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iguration InitConfiguration JoinConfiguration BootstrapToken Appears in: InitConfiguration BootstrapToken describes one bootstrap token, stored as a Secret in the cluster Field Description token [Required] BootstrapTokenStringtoken is used for establishing bidirectional trust between nodes and control-planes. Used for joining nodes in the cluster. description stringdescription sets a human-friendly message why this token exists and what it's used for, so other administrators can know its purpose.• • • • •

Field Description ttl meta/v1.Durationttl defines the time to live for this token. Defaults to 24h. expires and ttl are mutually exclusive. expires meta/v1.Timeexpires specifies the timestamp when this token expires. Defaults to being set dynamically at runtime based on the ttl. expires and ttl are mutually exclusive. usages []stringusages describes the ways in which this token can be used. Can by default be used for establishing bidirectional trust, but that can be changed here. groups []stringgroups specifies the extra groups that this token will authenticate as when/if used for authentication BootstrapTokenString Appears in: BootstrapToken BootstrapTokenString is a token of the format abcdef.abcdef0123456789 that is used for both validation of the practically of the API server from a joining node's point of view and as an authentication method for the node in the bootstrap phase of "kubeadm join". This token is and should be short-lived. Field Description - [Required] stringNo

description provided. - [Required] stringNo description provided. ClusterConfiguration ClusterConfiguration contains cluster-wide configuration for a kubeadm cluster. Field Description apiVersion stringkubeadm.k8s.io/v1beta3 kind stringClusterConfiguration etcd Etcdetcd holds the configuration for etcd. networking Networking

Field Description networking holds configuration for the networking topology of the cluster. kubernetesVersion stringkubernetesVersion is the target version of the control plane. controlPlaneEndpoint stringcontrolPlaneEndpoint sets a stable IP address or DNS name for the control plane. It can be a valid IP address or a RFC-1123 DNS subdomain, both with optional TCP port. In case the controlPlaneEndpoint is not specified, the advertiseAddress + bindPort are used; in case the controlPlaneEndpoint is specified but without a TCP port, the bindPort is used. Possible usages are: In a cluster with more than one control plane instances, this field should be assigned the address of the external load balancer in front of the control plane instances. In environments with enforced node recycling, the controlPlaneEndpoint could be used for assigning a stable DNS to the control plane. apiServer APIServerapiServer contains extra settings for the API server. controllerManager ControlPlane

ComponentcontrollerManager contains extra settings for the controller manager. scheduler ControlPlaneComponentscheduler contains extra settings for the scheduler. dns DNSdns defines the options for the DNS add-on installed in the cluster. certificatesDir stringcertificatesDir specifies where to store or look for all required certificates. imageRepository stringimageRepository sets the container registry to pull images from. If empty, registry.k8s.io will be used by default. In case of kubernetes version is a CI build (kubernetes version starts with ci/) gcr.io/k8s- staging-ci-images will be used as a default for control plane components and for kube-proxy, while registry.k8s.io will be used for all the other images. featureGates map[string]boolfeatureGates contains the feature gates enabled by the user. clusterName stringThe cluster name.•

InitConfiguration InitConfiguration contains a list of elements that is specific "kubeadm init"-only runtime information. kubeadm init -only information. These fields are solely used the first time kubeadm init runs. After that, the information in the fields IS NOT uploaded to the kubeadm- config ConfigMap that is used by kubeadm upgrade for instance. These fields must be omitempty. Field Description apiVersion stringkubeadm.k8s.io/v1beta3 kind stringInitConfiguration bootstrapTokens []BootstrapTokenbootstrapTokens is respected at kubeadm init time and describes a set of Bootstrap Tokens to create. This information IS NOT uploaded to the kubeadm cluster configmap, partly because of its sensitive nature nodeRegistration NodeRegistrationOptionsnodeRegistration holds fields that relate to registering the new control-plane node to the cluster. localAPIEndpoint APIEndpointlocalAPIEndpoint represents the endpoint of the API server instance that's deployed on this control plane node.

In HA setups, this differs from ClusterConfiguration.controlPlaneEndpoint in the sense that controlPlaneEndpoint is the global endpoint for the cluster, which then load-balances the requests to each individual API server. This configuration object lets you customize what IP/DNS name and port the local API server advertises it's accessible on. By default, kubeadm tries to auto-detect the IP of the default interface and use that, but in case that process fails you may set the desired value here. certificateKey stringcertificateKey sets the key with which certificates and keys are encrypted prior to being uploaded in a Secret in the cluster during the uploadcerts init phase. The certificate key is a hex encoded string that is an AES key of size 32 bytes. skipPhases []stringskipPhases is a list of phases to skip during command execution. The list of phases can be obtained with the kubeadm init --help command. The flag "--skip-phases" takes precedence over this field. patches Patchesp

atches contains options related to applying patches to components deployed by kubeadm during kubeadm init . JoinConfiguration JoinConfiguration contains elements describing a particular node

Field Description apiVersion stringkubeadm.k8s.io/v1beta3 kind stringJoinConfiguration nodeRegistration NodeRegistrationOptionsnodeRegistration holds fields that relate to registering the new control-plane node to the cluster. caCertPath stringcaCertPath is the path to the SSL certificate authority used to secure comunications between a node and the control-plane. Defaults to "/ etc/kubernetes/pki/ca.crt". discovery [Required] Discoverydiscovery specifies the options for the kubelet to use during the TLS bootstrap process. controlPlane JoinControlPlanecontrolPlane defines the additional control plane instance to be deployed on the joining node. If nil, no additional control plane instance will be deployed. skipPhases []stringskipPhases is a list of phases to skip during command execution. The list of phases can be obtained with the kubeadm join --help command. The flag --skip-phases takes precedence over this field. patches Patchespatches contains options related to applying pa

tches to components deployed by kubeadm during kubeadm join . APIEndpoint Appears in: InitConfiguration JoinControlPlane APIEndpoint struct contains elements of API server instance deployed on a node. Field Description advertiseAddress stringadvertiseAddress sets the IP address for the API server to advertise. bindPort int32bindPort sets the secure port for the API Server to bind to. Defaults to 6443.•

APIServer Appears in: ClusterConfiguration APIServer holds settings necessary for API server deployments in the cluster Field Description ControlPlaneComponent [Required] ControlPlaneComponent(Members of ControlPlaneComponent are embedded into this type.) No description provided. certSANs []stringcertSANs sets extra Subject Alternative Names (SANs) for the API Server signing certificate. timeoutForControlPlane meta/v1.DurationtimeoutForControlPlane controls the timeout that we wait for API server to appear. BootstrapTokenDiscovery Appears in: Discovery BootstrapTokenDiscovery is used to set the options for bootstrap token based discovery. Field Description token [Required] stringtoken is a token used to validate cluster information fetched from the control-plane. apiServerEndpoint stringapiServerEndpoint is an IP or domain name to the API server from which information will be fetched. caCertHashes []stringcaCertHashes specifies a set of public key pins to verify when token- ba

sed discovery is used. The root CA found during discovery must match one of these values. Specifying an empty set disables root CA pinning, which can be unsafe. Each hash is specified as <type>:<value> , where the only currently supported type is "sha256". This is a hex-encoded SHA-256 hash of the Subject Public Key Info (SPKI) object in DER-encoded ASN.1. These hashes can be calculated using, for example, OpenSSL.•

Field Description unsafeSkipCAVerification boolunsafeSkipCAVerification allows token-based discovery without CA verification via caCertHashes . This can weaken the security of kubeadm since other nodes can impersonate the control-plane. ControlPlaneComponent Appears in: ClusterConfiguration APIServer ControlPlaneComponent holds settings common to control plane component of the cluster Field Description extraArgs map[string]stringextraArgs is an extra set of flags to pass to the control plane component. A key in this map is the flag name as it appears on the command line except without leading dash(es). extraVolumes []HostPathMountextraVolumes is an extra set of host volumes, mounted to the control plane component. DNS Appears in: ClusterConfiguration DNS defines the DNS addon that should be used in the cluster Field Description ImageMeta [Required] ImageMeta(Members of ImageMeta are embedded into this type.) imageMeta allows to customize the image used for the DNS component. Dis

covery Appears in: JoinConfiguration Discovery specifies the options for the kubelet to use during the TLS Bootstrap process.• • •

Field Description bootstrapToken BootstrapTokenDiscoverybootstrapToken is used to set the options for bootstrap token based discovery. bootstrapToken and file are mutually exclusive. file FileDiscoveryfile is used to specify a file or URL to a kubeconfig file from which to load cluster information. bootstrapToken and file are mutually exclusive. tlsBootstrapToken stringtlsBootstrapToken is a token used for TLS bootstrapping. If bootstrapToken is set, this field is defaulted to .bootstrapToken.token , but can be overridden. If file is set, this field must be set in case the KubeConfigFile does not contain any other authentication information timeout meta/v1.Durationtimeout modifies the discovery timeout. Etcd Appears in: ClusterConfiguration Etcd contains elements describing Etcd configuration. Field Description local LocalEtcdlocal provides configuration knobs for configuring the local etcd instance. local and external are mutually exclusive. external ExternalEtcdexternal de

scribes how to connect to an external etcd cluster. local and external are mutually exclusive. ExternalEtcd Appears in: Etcd ExternalEtcd describes an external etcd cluster. Kubeadm has no knowledge of where certificate files live and they must be supplied. Field Description endpoints [Required] []stringendpoints contains the list of etcd members.•

Field Description caFile [Required] stringcaFile is an SSL Certificate Authority (CA) file used to secure etcd communication. Required if using a TLS connection. certFile [Required] stringcertFile is an SSL certification file used to secure etcd communication. Required if using a TLS connection. keyFile [Required] stringkeyFile is an SSL key file used to secure etcd communication. Required if using a TLS connection. FileDiscovery Appears in: Discovery FileDiscovery is used to specify a file or URL to a kubeconfig file from which to load cluster information. Field Description kubeConfigPath [Required] stringkubeConfigPath is used to specify the actual file path or URL to the kubeconfig file from which to load cluster information. HostPathMount Appears in: ControlPlaneComponent HostPathMount contains elements describing volumes that are mounted from the host. Field Description name [Required] stringname is the name of the volume inside the Pod template. hostPath [Required]

stringhostPath is the path in the host that will be mounted inside the Pod. mountPath [Required] stringmountPath is the path inside the Pod where hostPath will be mounted. readOnly boolreadOnly controls write access to the volume.•

Field Description pathType core/v1.HostPathTypepathType is the type of the hostPath . ImageMeta Appears in: DNS LocalEtcd ImageMeta allows to customize the image used for components that are not originated from the Kubernetes/Kubernetes release process Field Description imageRepository stringimageRepository sets the container registry to pull images from. If not set, the imageRepository defined in ClusterConfiguration will be used instead. imageTag stringimageTag allows to specify a tag for the image. In case this value is set, kubeadm does not change automatically the version of the above components during upgrades. JoinControlPlane Appears in: JoinConfiguration JoinControlPlane contains elements describing an additional control plane instance to be deployed on the joining node. Field Description localAPIEndpoint APIEndpointlocalAPIEndpoint represents the endpoint of the API server instance to be deployed on this node. certificateKey stringcertificateKey is the key that is used

for decryption of certificates after they are downloaded from the secret upon joining a new control plane node. The corresponding encryption key is in the InitConfiguration. The certificate key is a hex encoded string that is an AES key of size 32 bytes.• •

LocalEtcd Appears in: Etcd LocalEtcd describes that kubeadm should run an etcd cluster locally. Field Description ImageMeta [Required] ImageMeta(Members of ImageMeta are embedded into this type.) ImageMeta allows to customize the container used for etcd. dataDir [Required] stringdataDir is the directory etcd will place its data. Defaults to "/var/lib/etcd". extraArgs map[string]stringextraArgs are extra arguments provided to the etcd binary when run inside a static Pod. A key in this map is the flag name as it appears on the command line except without leading dash(es). serverCertSANs []stringserverCertSANs sets extra Subject Alternative Names (SANs) for the etcd server signing certificate. peerCertSANs []stringpeerCertSANs sets extra Subject Alternative Names (SANs) for the etcd peer signing certificate. Networking Appears in: ClusterConfiguration Networking contains elements describing cluster's networking configuration. Field Description serviceSubnet stringserviceSubnet i

s the subnet used by Kubernetes Services. Defaults to "10.96.0.0/12". podSubnet stringpodSubnet is the subnet used by Pods. dnsDomain stringdnsDomain is the DNS domain used by Kubernetes Services. Defaults to "cluster.local".•

NodeRegistrationOptions Appears in: InitConfiguration JoinConfiguration NodeRegistrationOptions holds fields that relate to registering a new control-plane or node to the cluster, either via kubeadm init or kubeadm join . Field Description name stringname is the .metadata.name field of the Node API object that will be created in this kubeadm init or kubeadm join operation. This field is also used in the CommonName field of the kubelet's client certificate to the API server. Defaults to the hostname of the node if not provided. criSocket stringcriSocket is used to retrieve container runtime info. This information will be annotated to the Node API object, for later re-use. taints [Required] []core/v1.Tainttaints specifies the taints the Node API object should be registered with. If this field is unset, i.e. nil, it will be defaulted with a control-plane taint for control-plane nodes. If you don't want to taint your control-plane node, set this field to an empty list, i.e. taints

: [] in the YAML file. This field is solely used for Node registration. kubeletExtraArgs map[string]stringkubeletExtraArgs passes through extra arguments to the kubelet. The arguments here are passed to the kubelet command line via the environment file kubeadm writes at runtime for the kubelet to source. This overrides the generic base-level configuration in the kubelet-config ConfigMap. Flags have higher priority when parsing. These values are local and specific to the node kubeadm is executing on. A key in this map is the flag name as it appears on the command line except without leading dash(es). ignorePreflightErrors []stringignorePreflightErrors provides a list of pre-flight errors to be ignored when the current node is registered, e.g. IsPrevilegedUser,Swap . Value all ignores errors from all checks. imagePullPolicy core/v1.PullPolicyimagePullPolicy specifies the policy for image pulling during kubeadm "init" and "join" operations. The value of this field must be one of "Alwa

ys", "IfNotPresent" or "Never". If this field is not set, kubeadm will default it to "IfNotPresent", or pull the required images if not present on the host.•

Patches Appears in: InitConfiguration JoinConfiguration Patches contains options related to applying patches to components deployed by kubeadm. Field Description directory stringdirectory is a path to a directory that contains files named "target[suffix] [+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube- scheduler", "etcd". "patchtype" can be one of "strategic" "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha-numerically. kubeadm Configuration (v1beta4) Overview Package v1beta4 defines the v1beta4 version of the kubeadm configuration file format. This version improves on the v1beta3 format by fixing some minor issues and adding a few new fields. A list of changes since v

1beta3: TODO https://github.com/kubernetes/kubeadm/issues/2890 Support custom environment variables in control plane components under ClusterConfiguration . Use APIServer.ExtraEnvs , ControllerManager.ExtraEnvs , Scheduler.ExtraEnvs , Etcd.Local.ExtraEnvs . The ResetConfiguration API type is now supported in v1beta4. Users are able to reset a node by passing a --config file to kubeadm reset . dry-run mode is now configureable in InitConfiguration and JoinConfiguration config files. Replace the existing string/string extra argument maps with structured extra arguments that support duplicates. The change applies to ClusterConfiguration - APIServer.ExtraArgs , ControllerManager.ExtraArgs , Scheduler.ExtraArgs . Also to NodeRegistrationOptions.KubeletExtraArgs . Add ClusterConfiguration.EncryptionAlgorithm that can be used to set the asymmetric encryption algorithm used for this cluster's keys and certificates. Can be "RSA" (default algorithm, key size is 2048) or "ECDSA" (uses

the P-256 elliptic curve). Add ClusterConfiguration.DNS.Disabled and ClusterConfiguration.Proxy.Disabled that can be used to disable the CoreDNS and kube-proxy addons during cluster initialization. Skipping the related addons phases, during cluster creation will set the same fields to false.• • • • • • • •

Migration from old kubeadm config versions kubeadm v1.15.x and newer can be used to migrate from v1beta1 to v1beta2. kubeadm v1.22.x and newer no longer support v1beta1 and older APIs, but can be used to migrate v1beta2 to v1beta3. kubeadm v1.27.x and newer no longer support v1beta2 and older APIs. TODO: https://github.com/kubernetes/kubeadm/issues/2890 add version that can be used to convert to v1beta4 Basics The preferred way to configure kubeadm is to pass an YAML configuration file with the `-- config“ option. Some of the configuration options defined in the kubeadm config file are also available as command line flags, but only the most common/simple use case are supported with this approach. A kubeadm config file could contain multiple configuration types separated using three dashes (---). kubeadm supports the following configuration types: apiVersion: kubeadm.k8s.io/v1beta4 kind: InitConfiguration apiVersion: kubeadm.k8s.io/v1beta4 kind: ClusterConfiguration apiVersion: kubelet.

config.k8s.io/v1beta1 kind: KubeletConfiguration apiVersion: kubeproxy.config.k8s.io/v1alpha1 kind: KubeProxyConfiguration apiVersion: kubeadm.k8s.io/v1beta4 kind: JoinConfiguration To print the defaults for "init" and "join" actions use the following commands: kubeadm config print init-defaults kubeadm config print join-defaults The list of configuration types that must be included in a configuration file depends by the action you are performing ( init or join`) and by the configuration options you are going to use (defaults or advanced customization).• • •

If some configuration types are not provided, or provided only partially, kubeadm will use default values; defaults provided by kubeadm includes also enforcing consistency of values across components when required (e.g. --cluster-cidr flag on controller manager and clusterCIDR on kube-proxy). Users are always allowed to override default values, with the only exception of a small subset of setting with relevance for security (e.g. enforce authorization-mode Node and RBAC on api server). If the user provides a configuration types that is not expected for the action you are performing, kubeadm will ignore those types and print a warning. Kubeadm init configuration types When executing kubeadm init with the `--config“ option, the following configuration types could be used: InitConfiguration, ClusterConfiguration, KubeProxyConfiguration, KubeletConfiguration, but only one between InitConfiguration and ClusterConfiguration is mandatory. apiVersion : kubeadm.k8s.io/v1beta4 kind: InitConfi

guration bootstrapTokens : ... nodeRegistration : ... The InitConfiguration type should be used to configure runtime settings, that in case of kubeadm init are the configuration of the bootstrap token and all the setting which are specific to the node where kubeadm is executed, including: NodeRegistration, that holds fields that relate to registering the new node to the cluster; use it to customize the node name, the CRI socket to use or any other settings that should apply to this node only (e.g. the node ip). LocalAPIEndpoint, that represents the endpoint of the instance of the API server to be deployed on this node; use it e.g. to customize the API server advertise address. apiVersion : kubeadm.k8s.io/v1beta4 kind: ClusterConfiguration networking : ... etcd: ... apiServer :•

extraArgs : ... extraVolumes : ... ... The ClusterConfiguration type should be used to configure cluster-wide settings, including settings for: networking that holds configuration for the networking topology of the cluster; use it e.g. to customize Pod subnet or services subnet. etcd: use it e.g. to customize the local etcd or to configure the API server for using an external etcd cluster. kube-apiserver, kube-scheduler, kube-controller-manager configurations; use it to customize control-plane components by adding customized setting or overriding kubeadm default settings. apiVersion : kubeproxy.config.k8s.io/v1alpha1 kind: KubeProxyConfiguration ... The KubeProxyConfiguration type should be used to change the configuration passed to kube- proxy instances deployed in the cluster. If this object is not provided or provided only partially, kubeadm applies defaults. See https://kubernetes.io/docs/reference/command-line-tools-reference/kube-proxy/ or https:// pkg.go.dev/k8s.io/kube-p

roxy/config/v1alpha1#KubeProxyConfiguration for kube-proxy official documentation. apiVersion : kubelet.config.k8s.io/v1beta1 kind: KubeletConfiguration ... The KubeletConfiguration type should be used to change the configurations that will be passed to all kubelet instances deployed in the cluster. If this object is not provided or provided only partially, kubeadm applies defaults. See https://kubernetes.io/docs/reference/command-line-tools-reference/kubelet/ or https:// pkg.go.dev/k8s.io/kubelet/config/v1beta1#KubeletConfiguration for kubelet official documentation. Here is a fully populated example of a single YAML file containing multiple configuration types to be used during a kubeadm init run. apiVersion : kubeadm.k8s.io/v1beta4 kind: InitConfiguration bootstrapTokens :• •

- token : "9a08jv.c0izixklcxtmnze7" description : "kubeadm bootstrap token" ttl: "24h" - token : "783bde.3f89s0fje9f38fhf" description : "another bootstrap token" usages : - authentication - signing groups : - system:bootstrappers:kubeadm:default-node-token nodeRegistration : name : "ec2-10-100-0-1" criSocket : "unix:///var/run/containerd/containerd.sock" taints : - key: "kubeadmNode" value : "someValue" effect : "NoSchedule" kubeletExtraArgs : v: 4 ignorePreflightErrors : - IsPrivilegedUser imagePullPolicy : "IfNotPresent" localAPIEndpoint : advertiseAddress : "10.100.0.1" bindPort : 6443 certificateKey : "e6a2eb8581237ab72a4f494f30285ec12a9694d750b9785706a83bfcbbbd2204" skipPhases : - addon/kube-proxy --- apiVersion : kubeadm.k8s.io/v1beta4 kind: ClusterConfiguration etcd: # one of local or external local : imageRepository : "registry.k8s.io" imageTag : "3.2.24" dataDir : "/var/lib/etcd" extraArgs : listen-client-urls

: "http://10.100.0.1:2379" serverCertSANs : - "ec2-10-100-0-1.compute-1.amazonaws.com" peerCertSANs : - "10.100.0.1" # external: # endpoints: # - "10.100.0.1:2379

# - "10.100.0.2:2379" # caFile: "/etcd/kubernetes/pki/etcd/etcd-ca.crt" # certFile: "/etcd/kubernetes/pki/etcd/etcd.crt" # keyFile: "/etcd/kubernetes/pki/etcd/etcd.key" networking : serviceSubnet : "10.96.0.0/16" podSubnet : "10.244.0.0/24" dnsDomain : "cluster.local" kubernetesVersion : "v1.21.0" controlPlaneEndpoint : "10.100.0.1:6443" apiServer : extraArgs : authorization-mode : "Node,RBAC" extraVolumes : - name : "some-volume" hostPath : "/etc/some-path" mountPath : "/etc/some-pod-path" readOnly : false pathType : File certSANs : - "10.100.1.1" - "ec2-10-100-0-1.compute-1.amazonaws.com" timeoutForControlPlane : 4m0s controllerManager : extraArgs : "node-cidr-mask-size": "20" extraVolumes : - name : "some-volume" hostPath : "/etc/some-path" mountPath : "/etc/some-pod-path" readOnly : false pathType : File scheduler : extraArgs : address : "10.100.0.1" extraVolumes : - name : "some-volume" hostPath : "/etc/some-path

" mountPath : "/etc/some-pod-path" readOnly : false pathType : File certificatesDir : "/etc/kubernetes/pki" imageRepository : "registry.k8s.io" clusterName : "example-cluster

--- apiVersion : kubelet.config.k8s.io/v1beta1 kind: KubeletConfiguration # kubelet specific options here --- apiVersion : kubeproxy.config.k8s.io/v1alpha1 kind: KubeProxyConfiguration # kube-proxy specific options here Kubeadm join configuration types When executing kubeadm join with the --config option, the JoinConfiguration type should be provided. apiVersion : kubeadm.k8s.io/v1beta4 kind: JoinConfiguration ... The JoinConfiguration type should be used to configure runtime settings, that in case of kubeadm join are the discovery method used for accessing the cluster info and all the setting which are specific to the node where kubeadm is executed, including: nodeRegistration , that holds fields that relate to registering the new node to the cluster; use it to customize the node name, the CRI socket to use or any other settings that should apply to this node only (e.g. the node ip). `apiEndpoint“, that represents the endpoint of the instance of the API server to be eventually deploy

ed on this node. Resource Types ClusterConfiguration InitConfiguration JoinConfiguration ResetConfiguration BootstrapToken Appears in: InitConfiguration InitConfiguration BootstrapToken describes one bootstrap token, stored as a Secret in the cluster• • • • • • •

Field Description token [Required] BootstrapTokenStringtoken is used for establishing bidirectional trust between nodes and control-planes. Used for joining nodes in the cluster. description stringdescription sets a human-friendly message why this token exists and what it's used for, so other administrators can know its purpose. ttl meta/v1.Durationttl defines the time to live for this token. Defaults to 24h. expires and ttl are mutually exclusive. expires meta/v1.Timeexpires specifies the timestamp when this token expires. Defaults to being set dynamically at runtime based on the ttl. expires and ttl are mutually exclusive. usages []stringusages describes the ways in which this token can be used. Can by default be used for establishing bidirectional trust, but that can be changed here. groups []stringgroups specifies the extra groups that this token will authenticate as when/if used for authentication BootstrapTokenString Appears in: BootstrapToken BootstrapTokenString is a to

ken of the format abcdef.abcdef0123456789 that is used for both validation of the practically of the API server from a joining node's point of view and as an authentication method for the node in the bootstrap phase of "kubeadm join". This token is and should be short-lived. Field Description - [Required] stringNo description provided. - [Required] stringNo description provided. ClusterConfiguration ClusterConfiguration contains cluster-wide configuration for a kubeadm cluster. Field Description kubeadm.k8s.io/v1beta4

Field Description apiVersion string kind stringClusterConfiguration etcd Etcdetcd holds the configuration for etcd. networking Networkingnetworking holds configuration for the networking topology of the cluster. kubernetesVersion stringkubernetesVersion is the target version of the control plane. controlPlaneEndpoint stringontrolPlaneEndpoint sets a stable IP address or DNS name for the control plane; It can be a valid IP address or a RFC-1123 DNS subdomain, both with optional TCP port. In case the controlPlaneEndpoint is not specified, the advertiseAddress + bindPort are used; in case the controlPlaneEndpoint is specified but without a TCP port, the bindPort is used. Possible usages are: In a cluster with more than one control plane instances, this field should be assigned the address of the external load balancer in front of the control plane instances. In environments with enforced node recycling, the controlPlaneEndpoint could be used for assigning a stable DNS to the c

ontrol plane. apiServer APIServerapiServer contains extra settings for the API server. controllerManager ControlPlaneComponentcontrollerManager contains extra settings for the controller manager. scheduler ControlPlaneComponentscheduler contains extra settings for the scheduler. dns DNSdns defines the options for the DNS add-on installed in the cluster. proxy [Required] Proxyproxy defines the options for the proxy add-on installed in the cluster. certificatesDir stringcertificatesDir specifies where to store or look for all required certificates. imageRepository string•

Field Description imageRepository sets the container registry to pull images from. If empty, registry.k8s.io will be used by default. In case of kubernetes version is a CI build (kubernetes version starts with ci/) gcr.io/k8s- staging-ci-images will be used as a default for control plane components and for kube-proxy, while registry.k8s.io will be used for all the other images. featureGates map[string]boolfeatureGates contains the feature gates enabled by the user. clusterName stringThe cluster name. encryptionAlgorithm EncryptionAlgorithmTypeencryptionAlgorithm holds the type of asymmetric encryption algorithm used for keys and certificates. Can be "RSA" (default algorithm, key size is 2048) or "ECDSA" (uses the P-256 elliptic curve). InitConfiguration InitConfiguration contains a list of elements that is specific "kubeadm init"-only runtime information. kubeadm init -only information. These fields are solely used the first time kubeadm init runs. After that, the information

in the fields IS NOT uploaded to the kubeadm- config ConfigMap that is used by kubeadm upgrade for instance. These fields must be omitempty. Field Description apiVersion stringkubeadm.k8s.io/v1beta4 kind stringInitConfiguration bootstrapTokens []BootstrapTokenbootstrapTokens is respected at kubeadm init time and describes a set of Bootstrap Tokens to create. This information IS NOT uploaded to the kubeadm cluster configmap, partly because of its sensitive nature dryRun [Required] booldryRun tells if the dry run mode is enabled, don't apply any change in dry run mode, just out put what would be done. nodeRegistration NodeRegistrationOptionsnodeRegistration holds fields that relate to registering the new control-plane node to the cluster. localAPIEndpoint APIEndpointlocalAPIEndpoint represents the endpoint of the API server instance that's deployed on this control plane node. In HA setups, this differs from ClusterConfiguration.controlPlaneEndpoint in the sense tha

Field Description ontrolPlaneEndpoint is the global endpoint for the cluster, which then loadbalances the requests to each individual API server. This configuration object lets you customize what IP/DNS name and port the local API server advertises it's accessible on. By default, kubeadm tries to auto-detect the IP of the default interface and use that, but in case that process fails you may set the desired value here. certificateKey stringcertificateKey sets the key with which certificates and keys are encrypted prior to being uploaded in a Secret in the cluster during the uploadcerts init phase. The certificate key is a hex encoded string that is an AES key of size 32 bytes. skipPhases []stringskipPhases is a list of phases to skip during command execution. The list of phases can be obtained with the kubeadm init --help command. The flag --skip-phases takes precedence over this field. patches Patchespatches contains options related to applying patches to components deployed by

kubeadm during kubeadm init . JoinConfiguration JoinConfiguration contains elements describing a particular node. Field Description apiVersion stringkubeadm.k8s.io/v1beta4 kind stringJoinConfiguration dryRun booldryRun tells if the dry run mode is enabled, don't apply any change if it is set, just output what would be done. nodeRegistration NodeRegistrationOptionsnodeRegistration holds fields that relate to registering the new control-plane node to the cluster caCertPath stringcaCertPath is the path to the SSL certificate authority used to secure comunications between node and control-plane. Defaults to "/etc/ kubernetes/pki/ca.crt". discovery [Required] Discoverydiscovery specifies the options for the kubelet to use during the TLS bootstrap process. controlPlane JoinControlPlan

Field Description controlPlane defines the additional control plane instance to be deployed on the joining node. If nil, no additional control plane instance will be deployed. skipPhases []stringskipPhases is a list of phases to skip during command execution. The list of phases can be obtained with the kubeadm join --help command. The flag --skip-phases takes precedence over this field. patches Patchespatches contains options related to applying patches to components deployed by kubeadm during kubeadm join . ResetConfiguration ResetConfiguration contains a list of fields that are specifically kubeadm reset -only runtime information. Field Description apiVersion stringkubeadm.k8s.io/v1beta4 kind stringResetConfiguration cleanupTmpDir boolcleanupTmpDir specifies whether the "/etc/kubernetes/tmp" directory should be cleaned during the reset process. certificatesDir stringcertificatesDir specifies the directory where the certificates are stored. If specified, it will be cleaned durin

g the reset process. criSocket stringcriSocket is used to retrieve container runtime inforomation and used for the removal of the containers. If criSocket is not specified by flag or config file, kubeadm will try to detect one valid CRI socket instead. dryRun booldryRun tells if the dry run mode is enabled, don't apply any change if it is set and just output what would be done. force boolThe force flag instructs kubeadm to reset the node without prompting for confirmation. ignorePreflightErrors []stringignorePreflightErrors provides a list of pre-flight errors to be ignored during the reset process, e.g. IsPrivilegedUser,Swap . Value all ignores errors from all checks

Field Description skipPhases []stringskipPhases is a list of phases to skip during command execution. The list of phases can be obtained with the kubeadm reset phase --help command. APIEndpoint Appears in: InitConfiguration JoinControlPlane APIEndpoint struct contains elements of API server instance deployed on a node. Field Description advertiseAddress stringdvertiseAddress sets the IP address for the API server to advertise. bindPort int32bindPort sets the secure port for the API Server to bind to. Defaults to 6443. APIServer Appears in: ClusterConfiguration APIServer holds settings necessary for API server deployments in the cluster Field Description ControlPlaneComponent [Required] ControlPlaneComponent(Members of ControlPlaneComponent are embedded into this type.) No description provided. certSANs []stringcertSANs sets extra Subject Alternative Names (SANs) for the API Server signing certificate. timeoutForControlPlane meta/v1.DurationtimeoutForControlPlane controls the ti

meout that we use for API server to appear. Arg Appears in: ControlPlaneComponent• • •

LocalEtcd NodeRegistrationOptions Arg represents an argument with a name and a value. Field Description name [Required] stringThe name of the argument. value [Required] stringThe value of the argument. BootstrapTokenDiscovery Appears in: Discovery BootstrapTokenDiscovery is used to set the options for bootstrap token based discovery. Field Description token [Required] stringtoken is a token used to validate cluster information fetched from the control-plane. apiServerEndpoint stringapiServerEndpoint is an IP or domain name to the API server from which information will be fetched. caCertHashes []stringcaCertHashes specifies a set of public key pins to verify when token- based discovery is used. The root CA found during discovery must match one of these values. Specifying an empty set disables root CA pinning, which can be unsafe. Each hash is specified as <type>:<value> , where the only currently supported type is "sha256". This is a hex-encoded SHA-256 hash of the Subject Public

Key Info (SPKI) object in DER-encoded ASN.1. These hashes can be // calculated using, for example, OpenSSL. unsafeSkipCAVerification boolunsafeSkipCAVerification allows token-based discovery without CA verification via caCertHashes . This can weaken the security of kubeadm since other nodes can impersonate the control-plane. ControlPlaneComponent Appears in: ClusterConfiguration• • •

APIServer ControlPlaneComponent holds settings common to control plane component of the cluster Field Description extraArgs []ArgextraArgs is an extra set of flags to pass to the control plane component. An argument name in this list is the flag name as it appears on the command line except without leading dash(es). Extra arguments will override existing default arguments. Duplicate extra arguments are allowed. extraVolumes []HostPathMountextraVolumes is an extra set of host volumes, mounted to the control plane component. extraEnvs []EnvVarextraEnvs is an extra set of environment variables to pass to the control plane component. Environment variables passed using extraEnvs will override any existing environment variables, or *_proxy environment variables that kubeadm adds by default. DNS Appears in: ClusterConfiguration DNS defines the DNS addon that should be used in the cluster Field Description ImageMeta [Required] ImageMeta(Members of ImageMeta are embedded into this type.)

imageMeta allows to customize the image used for the DNS addon. disabled [Required] booldisabled specifies whether to disable this addon in the cluster. Discovery Appears in: JoinConfiguration Discovery specifies the options for the kubelet to use during the TLS Bootstrap process Field Description bootstrapToken BootstrapTokenDiscoverybootstrapToken is used to set the options for bootstrap token based discovery. bootstrapToken and file are mutually exclusive.• •

Field Description file FileDiscoveryfile is used to specify a file or URL to a kubeconfig file from which to load cluster information. bootstrapToken and file are mutually exclusive. tlsBootstrapToken stringtlsBootstrapToken is a token used for TLS bootstrapping. If bootstrapToken is set, this field is defaulted to bootstrapToken.token , but can be overridden. If file is set, this field must be set in case the KubeConfigFile does not contain any other authentication information. timeout meta/v1.Durationtimeout modifies the discovery timeout. EncryptionAlgorithmType (Alias of string ) Appears in: ClusterConfiguration EncryptionAlgorithmType can define an asymmetric encryption algorithm type. EnvVar Appears in: ControlPlaneComponent LocalEtcd EnvVar represents an environment variable present in a Container. Field Description EnvVar [Required] core/v1.EnvVar(Members of EnvVar are embedded into this type.) No description provided. Etcd Appears in: ClusterConfiguration Etcd contain

s elements describing Etcd configuration.• • •

Field Description local LocalEtcdlocal provides configuration knobs for configuring the local etcd instance. local and external are mutually exclusive. external ExternalEtcdexternal describes how to connect to an external etcd cluster. local and external are mutually exclusive. ExternalEtcd Appears in: Etcd ExternalEtcd describes an external etcd cluster. Kubeadm has no knowledge of where certificate files live and they must be supplied. Field Description endpoints [Required] []stringendpoints contains the list of etcd members. caFile [Required] stringcaFile is an SSL Certificate Authority (CA) file used to secure etcd communication. Required if using a TLS connection. certFile [Required] stringcertFile is an SSL certification file used to secure etcd communication. Required if using a TLS connection. keyFile [Required] stringkeyFile is an SSL key file used to secure etcd communication. Required if using a TLS connection. FileDiscovery Appears in: Discovery FileDiscover

y is used to specify a file or URL to a kubeconfig file from which to load cluster information. Field Description kubeConfigPath [Required] stringkubeConfigPath is used to specify the actual file path or URL to the kubeconfig file from which to load cluster information.•

HostPathMount Appears in: ControlPlaneComponent HostPathMount contains elements describing volumes that are mounted from the host. Field Description name [Required] stringname is the name of the volume inside the Pod template. hostPath [Required] stringhostPath is the path in the host that will be mounted inside the Pod. mountPath [Required] stringmountPath is the path inside the Pod where hostPath will be mounted. readOnly boolreadOnly controls write access to the volume. pathType core/v1.HostPathTypepathType is the type of the hostPath . ImageMeta Appears in: DNS LocalEtcd ImageMeta allows to customize the image used for components that are not originated from the Kubernetes/Kubernetes release process Field Description imageRepository stringimageRepository sets the container registry to pull images from. if not set, the imageRepository defined in ClusterConfiguration will be used instead. imageTag stringimageTag allows to specify a tag for the image. In case this value i

s set, kubeadm does not change automatically the version of the above components during upgrades. JoinControlPlane Appears in: JoinConfiguration• • •

JoinControlPlane contains elements describing an additional control plane instance to be deployed on the joining node. Field Description localAPIEndpoint APIEndpointlocalAPIEndpoint represents the endpoint of the API server instance to be deployed on this node. certificateKey stringcertificateKey is the key that is used for decryption of certificates after they are downloaded from the Secret upon joining a new control plane node. The corresponding encryption key is in the InitConfiguration. The certificate key is a hex encoded string that is an AES key of size 32 bytes. LocalEtcd Appears in: Etcd LocalEtcd describes that kubeadm should run an etcd cluster locally. Field Description ImageMeta [Required] ImageMeta(Members of ImageMeta are embedded into this type.) ImageMeta allows to customize the container used for etcd dataDir [Required] stringdataDir is the directory etcd will place its data. Defaults to "/var/lib/etcd". extraArgs [Required] []ArgextraArgs are extra argumen

ts provided to the etcd binary when run inside a static Pod. An argument name in this list is the flag name as it appears on the command line except without leading dash(es). Extra arguments will override existing default arguments. Duplicate extra arguments are allowed. extraEnvs []EnvVarextraEnvs is an extra set of environment variables to pass to the control plane component. Environment variables passed using extraEnvs will override any existing environment variables, or *_proxy environment variables that kubeadm adds by default. serverCertSANs []stringserverCertSANs sets extra Subject Alternative Names (SANs) for the etcd server signing certificate. peerCertSANs []stringpeerCertSANs sets extra Subject Alternative Names (SANs) for the etcd peer signing certificate.

Networking Appears in: ClusterConfiguration Networking contains elements describing cluster's networking configuration. Field Description serviceSubnet stringserviceSubnet is the subnet used by Kubernetes Services. Defaults to "10.96.0.0/12". podSubnet stringpodSubnet is the subnet used by Pods. dnsDomain stringdnsDomain is the dns domain used by Kubernetes Services. Defaults to "cluster.local". NodeRegistrationOptions Appears in: InitConfiguration JoinConfiguration NodeRegistrationOptions holds fields that relate to registering a new control-plane or node to the cluster, either via kubeadm init or kubeadm join . Field Description name stringname is the .Metadata.Name field of the Node API object that will be created in this kubeadm init or kubeadm join operation. This field is also used in the CommonName field of the kubelet's client certificate to the API server. Defaults to the hostname of the node if not provided. criSocket stringcriSocket is used to retrieve container ru

ntime info. This information will be annotated to the Node API object, for later re-use. taints [Required] []core/v1.Tainttaints specifies the taints the Node API object should be registered with. If this field is unset, i.e. nil, it will be defaulted with a control-plane taint for control-plane nodes. If you don't want to taint your control-plane node, set this field to an empty list, i.e. taints: [] in the YAML file. This field is solely used for Node registration. kubeletExtraArgs []ArgkubeletExtraArgs passes through extra arguments to the kubelet. The arguments here are passed to the kubelet command line via the• •

Field Description environment file kubeadm writes at runtime for the kubelet to source. This overrides the generic base-level configuration in the kubelet-config ConfigMap. Flags have higher priority when parsing. These values are local and specific to the node kubeadm is executing on. An argument name in this list is the flag name as it appears on the command line except without leading dash(es). Extra arguments will override existing default arguments. Duplicate extra arguments are allowed. ignorePreflightErrors []stringignorePreflightErrors provides a slice of pre-flight errors to be ignored when the current node is registered, e.g. 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks. imagePullPolicy core/v1.PullPolicyimagePullPolicy specifies the policy for image pulling during kubeadm init and join operations. The value of this field must be one of "Always", "IfNotPresent" or "Never". If this field is unset kubeadm will default it to "IfNotPresent", or pull the

required images if not present on the host. Patches Appears in: InitConfiguration JoinConfiguration Patches contains options related to applying patches to components deployed by kubeadm. Field Description directory stringdirectory is a path to a directory that contains files named "target[suffix] [+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube- scheduler", "etcd", "kubeletconfiguration". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha- numerically. Proxy Appears in: ClusterConfiguration Proxy defines the proxy addon that should be used in the cluster.• •

Field Description disabled [Required] booldisabled specifies whether to disable this addon in the cluster. kubeconfig (v1) Resource Types Config Config Config holds the information needed to build connect to remote kubernetes clusters as a given user Field Description apiVersion string/v1 kind stringConfig kind stringLegacy field from pkg/api/types.go TypeMeta. TODO(jlowdermilk): remove this after eliminating downstream dependencies. apiVersion stringLegacy field from pkg/api/types.go TypeMeta. TODO(jlowdermilk): remove this after eliminating downstream dependencies. preferences [Required] PreferencesPreferences holds general information to be use for cli interactions clusters [Required] []NamedClusterClusters is a map of referencable names to cluster configs users [Required] []NamedAuthInfoAuthInfos is a map of referencable names to user configs contexts [Required] []NamedContextContexts is a map of referencable names to context configs current-context [Required] stringCurren

tContext is the name of the context that you would like to use by default extensions []NamedExtensionExtensions holds additional information. This is useful for extenders so that reads and writes don't clobber unknown fields

AuthInfo Appears in: NamedAuthInfo AuthInfo contains information that describes identity information. This is use to tell the kubernetes cluster who you are. Field Description client-certificate stringClientCertificate is the path to a client cert file for TLS. client-certificate- data []byteClientCertificateData contains PEM-encoded data from a client cert file for TLS. Overrides ClientCertificate client-key stringClientKey is the path to a client key file for TLS. client-key-data []byteClientKeyData contains PEM-encoded data from a client key file for TLS. Overrides ClientKey token stringToken is the bearer token for authentication to the kubernetes cluster. tokenFile stringTokenFile is a pointer to a file that contains a bearer token (as described above). If both Token and TokenFile are present, Token takes precedence. as stringImpersonate is the username to impersonate. The name matches the flag. as-uid stringImpersonateUID is the uid to impersonate. as-groups []stringImpersonateGr

oups is the groups to impersonate. as-user-extra map[string][]stringImpersonateUserExtra contains additional information for impersonated user. username stringUsername is the username for basic authentication to the kubernetes cluster. password stringPassword is the password for basic authentication to the kubernetes cluster.

Field Description auth-provider AuthProviderConfigAuthProvider specifies a custom authentication plugin for the kubernetes cluster. exec ExecConfigExec specifies a custom exec-based authentication plugin for the kubernetes cluster. extensions []NamedExtensionExtensions holds additional information. This is useful for extenders so that reads and writes don't clobber unknown fields AuthProviderConfig Appears in: AuthInfo AuthProviderConfig holds the configuration for a specified auth provider. Field Description name [Required] stringNo description provided. config [Required] map[string]stringNo description provided. Cluster Appears in: NamedCluster Cluster contains information about how to communicate with a kubernetes cluster Field Description server [Required] stringServer is the address of the kubernetes cluster (https://hostname:port). tls-server-name stringTLSServerName is used to check server certificate. If TLSServerName is empty, the hostname used to contact the server is used

. insecure-skip-tls- verify boolInsecureSkipTLSVerify skips the validity check for the server's certificate. This will make your HTTPS connections insecure. certificate- authority stringCertificateAuthority is the path to a cert file for the certificate authority.•

Field Description certificate- authority-data []byteCertificateAuthorityData contains PEM-encoded certificate authority certificates. Overrides CertificateAuthority proxy-url stringProxyURL is the URL to the proxy to be used for all requests made by this client. URLs with "http", "https", and "socks5" schemes are supported. If this configuration is not provided or the empty string, the client attempts to construct a proxy configuration from http_proxy and https_proxy environment variables. If these environment variables are not set, the client does not attempt to proxy requests. socks5 proxying does not currently support spdy streaming endpoints (exec, attach, port forward). disable- compression boolDisableCompression allows client to opt-out of response compression for all requests to the server. This is useful to speed up requests (specifically lists) when client-server network bandwidth is ample, by saving time on compression (server-side) and decompression (client-side): https:// g

ithub.com/kubernetes/kubernetes/issues/112296. extensions []NamedExtensionExtensions holds additional information. This is useful for extenders so that reads and writes don't clobber unknown fields Context Appears in: NamedContext Context is a tuple of references to a cluster (how do I communicate with a kubernetes cluster), a user (how do I identify myself), and a namespace (what subset of resources do I want to work with) Field Description cluster [Required] stringCluster is the name of the cluster for this context user [Required] stringAuthInfo is the name of the authInfo for this context namespace stringNamespace is the default namespace to use on unspecified requests extensions []NamedExtensionExtensions holds additional information. This is useful for extenders so that reads and writes don't clobber unknown fields

ExecConfig Appears in: AuthInfo ExecConfig specifies a command to provide client credentials. The command is exec'd and outputs structured stdout holding credentials. See the client.authentication.k8s.io API group for specifications of the exact input and output format Field Description command [Required] stringCommand to execute. args []stringArguments to pass to the command when executing it. env []ExecEnvVarEnv defines additional environment variables to expose to the process. These are unioned with the host's environment, as well as variables client-go uses to pass argument to the plugin. apiVersion [Required] stringPreferred input version of the ExecInfo. The returned ExecCredentials MUST use the same encoding version as the input. installHint [Required] stringThis text is shown to the user when the executable doesn't seem to be present. For example, brew install foo-cli might be a good InstallHint for foo-cli on Mac OS systems. provideClusterInfo [Required] boolProvideCl

usterInfo determines whether or not to provide cluster information, which could potentially contain very large CA data, to this exec plugin as a part of the KUBERNETES_EXEC_INFO environment variable. By default, it is set to false. Package k8s.io/client-go/tools/ auth/exec provides helper methods for reading this environment variable. interactiveMode ExecInteractiveModeInteractiveMode determines this plugin's relationship with standard input. Valid values are "Never" (this exec plugin never uses standard input), "IfAvailable" (this exec plugin wants to use standard input if it is available), or "Always" (this exec plugin requires standard input to function). See ExecInteractiveMode values for more details. If APIVersion is client.authentication.k8s.io/v1alpha1 or client.authentication.k8s.io/v1beta1, then this field is optional and defaults to "IfAvailable" when unset. Otherwise, this field is required.

ExecEnvVar Appears in: ExecConfig ExecEnvVar is used for setting environment variables when executing an exec-based credential plugin. Field Description name [Required] stringNo description provided. value [Required] stringNo description provided. ExecInteractiveMode (Alias of string ) Appears in: ExecConfig ExecInteractiveMode is a string that describes an exec plugin's relationship with standard input. NamedAuthInfo Appears in: Config NamedAuthInfo relates nicknames to auth information Field Description name [Required] stringName is the nickname for this AuthInfo user [Required] AuthInfoAuthInfo holds the auth information NamedCluster Appears in: Config NamedCluster relates nicknames to cluster information• • • •

Field Description name [Required] stringName is the nickname for this Cluster cluster [Required] ClusterCluster holds the cluster information NamedContext Appears in: Config NamedContext relates nicknames to context information Field Description name [Required] stringName is the nickname for this Context context [Required] ContextContext holds the context information NamedExtension Appears in: Config AuthInfo Cluster Context Preferences NamedExtension relates nicknames to extension information Field Description name [Required] stringName is the nickname for this Extension extension [Required] k8s.io/apimachinery/pkg/runtime.RawExtensionExtension holds the extension information• • • • • •

Preferences Appears in: Config Field Description colors boolNo description provided. extensions []NamedExtensionExtensions holds additional information. This is useful for extenders so that reads and writes don't clobber unknown fields Kubelet Configuration (v1) Resource Types CredentialProviderConfig CredentialProviderConfig CredentialProviderConfig is the configuration containing information about each exec credential provider. Kubelet reads this configuration from disk and enables each provider as specified by the CredentialProvider type. Field Description apiVersion stringkubelet.config.k8s.io/v1 kind stringCredentialProviderConfig providers [Required] []CredentialProviderproviders is a list of credential provider plugins that will be enabled by the kubelet. Multiple providers may match against a single image, in which case credentials from all providers will be returned to the kubelet. If multiple providers are called for a single image, the results are combined. If providers re

turn overlapping auth keys, the value from the provider earlier in this list is used. CredentialProvider Appears in: CredentialProviderConfig CredentialProvider represents an exec plugin to be invoked by the kubelet. The plugin is only invoked when an image being pulled matches the images handled by the plugin (see matchImages).• •

Field Description name [Required] stringname is the required name of the credential provider. It must match the name of the provider executable as seen by the kubelet. The executable must be in the kubelet's bin directory (set by the --image-credential- provider-bin-dir flag). matchImages [Required] []stringmatchImages is a required list of strings used to match against images in order to determine if this provider should be invoked. If one of the strings matches the requested image from the kubelet, the plugin will be invoked and given a chance to provide credentials. Images are expected to contain the registry domain and URL path. Each entry in matchImages is a pattern which can optionally contain a port and a path. Globs can be used in the domain, but not in the port or the path. Globs are supported as subdomains like ' .k8s.io' or 'k8s. .io', and top-level-domains such as 'k8s. '. Matching partial subdomains like 'app.k8s.io' is also supported. Each glob can only match a single

subdomain segment, so *.io does not match *.k8s.io. A match exists between an image and a matchImage when all of the below are true: Both contain the same number of domain parts and each part matches. The URL path of an imageMatch must be a prefix of the target image URL path. If the imageMatch contains a port, then the port must match in the image as well. Example values of matchImages: 123456789.dkr.ecr.us-east-1.amazonaws.com *.azurecr.io gcr.io ..registry.io registry.io:8080/path defaultCacheDuration [Required] meta/v1.DurationdefaultCacheDuration is the default duration the plugin will cache credentials in-memory if a cache duration is not provided in the plugin response. This field is required. apiVersion [Required] stringRequired input version of the exec CredentialProviderRequest. The returned CredentialProviderResponse MUST use the same encoding version as the input. Current supported values are: credentialprovider.kubelet.k8s.io/v1 args []stringArguments to pass to the co

mmand when executing it.• • • • • • • •

Field Description env []ExecEnvVarEnv defines additional environment variables to expose to the process. These are unioned with the host's environment, as well as variables client-go uses to pass argument to the plugin. ExecEnvVar Appears in: CredentialProvider ExecEnvVar is used for setting environment variables when executing an exec-based credential plugin. Field Description name [Required] stringNo description provided. value [Required] stringNo description provided. Kubelet Configuration (v1alpha1) Resource Types CredentialProviderConfig CredentialProviderConfig CredentialProviderConfig is the configuration containing information about each exec credential provider. Kubelet reads this configuration from disk and enables each provider as specified by the CredentialProvider type. Field Description apiVersion stringkubelet.config.k8s.io/v1alpha1 kind stringCredentialProviderConfig providers [Required] []CredentialProviderproviders is a list of credential provider plugins that wil

l be enabled by the kubelet. Multiple providers may match against a single image, in which case credentials from all providers will be returned to the kubelet. If multiple providers are called for a single image, the results are combined. If providers return overlapping auth keys, the value from the provider earlier in this list is used.•

CredentialProvider Appears in: CredentialProviderConfig CredentialProvider represents an exec plugin to be invoked by the kubelet. The plugin is only invoked when an image being pulled matches the images handled by the plugin (see matchImages). Field Description name [Required] stringname is the required name of the credential provider. It must match the name of the provider executable as seen by the kubelet. The executable must be in the kubelet's bin directory (set by the --image-credential- provider-bin-dir flag). matchImages [Required] []stringmatchImages is a required list of strings used to match against images in order to determine if this provider should be invoked. If one of the strings matches the requested image from the kubelet, the plugin will be invoked and given a chance to provide credentials. Images are expected to contain the registry domain and URL path. Each entry in matchImages is a pattern which can optionally contain a port and a path. Globs can be used in the

domain, but not in the port or the path. Globs are supported as subdomains like *.k8s.io or k8s.*.io , and top-level-domains such as k8s.*. Matching partial subdomains like app*.k8s.io is also supported. Each glob can only match a single subdomain segment, so *.io does not match *.k8s.io . A match exists between an image and a matchImage when all of the below are true: Both contain the same number of domain parts and each part matches. The URL path of an imageMatch must be a prefix of the target image URL path. If the imageMatch contains a port, then the port must match in the image as well. Example values of matchImages: 123456789.dkr.ecr.us-east-1.amazonaws.com *.azurecr.io gcr.io *.*.registry.io registry.io:8080/path• • • • • • • •

Field Description defaultCacheDuration [Required] meta/v1.DurationdefaultCacheDuration is the default duration the plugin will cache credentials in-memory if a cache duration is not provided in the plugin response. This field is required. apiVersion [Required] stringRequired input version of the exec CredentialProviderRequest. The returned CredentialProviderResponse MUST use the same encoding version as the input. Current supported values are: credentialprovider.kubelet.k8s.io/v1alpha1 args []stringArguments to pass to the command when executing it. env []ExecEnvVarEnv defines additional environment variables to expose to the process. These are unioned with the host's environment, as well as variables client-go uses to pass argument to the plugin. ExecEnvVar Appears in: CredentialProvider ExecEnvVar is used for setting environment variables when executing an exec-based credential plugin. Field Description name [Required] stringNo description provided. value [Required] stringNo de

scription provided. Kubelet Configuration (v1beta1) Resource Types CredentialProviderConfig KubeletConfiguration SerializedNodeConfigSource FormatOptions Appears in: LoggingConfiguration• • • • •

FormatOptions contains options for the different logging formats. Field Description json [Required] JSONOptions[Alpha] JSON contains options for logging format "json". Only available when the LoggingAlphaOptions feature gate is enabled. JSONOptions Appears in: FormatOptions JSONOptions contains options for logging format "json". Field Description splitStream [Required] bool[Alpha] SplitStream redirects error messages to stderr while info messages go to stdout, with buffering. The default is to write both to stdout, without buffering. Only available when the LoggingAlphaOptions feature gate is enabled. infoBufferSize [Required] k8s.io/apimachinery/pkg/api/ resource.QuantityValue[Alpha] InfoBufferSize sets the size of the info stream when using split streams. The default is zero, which disables buffering. Only available when the LoggingAlphaOptions feature gate is enabled. LogFormatFactory LogFormatFactory provides support for a certain additional, non-default log format. LoggingConfi

guration Appears in: KubeletConfiguration LoggingConfiguration contains logging options. Field Description format [Required] stringFormat Flag specifies the structure of log messages. default value of format is text flushFrequency [Required] TimeOrMetaDurationMaximum time between log flushes. If a string, parsed as a duration (i.e. "1s") If an int, the maximum number of nanoseconds (i.e. 1s =•

Field Description 1000000000). Ignored if the selected logging backend writes log messages without buffering. verbosity [Required] VerbosityLevelVerbosity is the threshold that determines which log messages are logged. Default is zero which logs only the most important messages. Higher values enable additional messages. Error messages are always logged. vmodule [Required] VModuleConfigurationVModule overrides the verbosity threshold for individual files. Only supported for "text" log format. options [Required] FormatOptions[Alpha] Options holds additional parameters that are specific to the different logging formats. Only the options for the selected format get used, but all of them get validated. Only available when the LoggingAlphaOptions feature gate is enabled. LoggingOptions LoggingOptions can be used with ValidateAndApplyWithOptions to override certain global defaults. Field Description ErrorStream [Required] io.WriterErrorStream can be used to override the os.Stderr default.

InfoStream [Required] io.WriterInfoStream can be used to override the os.Stdout default. TimeOrMetaDuration Appears in: LoggingConfiguration TimeOrMetaDuration is present only for backwards compatibility for the flushFrequency field, and new fields should use metav1.Duration. Field Description Duration [Required] meta/v1.DurationDuration holds the duration - [Required] boolSerializeAsString controls whether the value is serialized as a string or an integer

TracingConfiguration Appears in: KubeletConfiguration TracingConfiguration provides versioned configuration for OpenTelemetry tracing clients. Field Description endpoint stringEndpoint of the collector this component will report traces to. The connection is insecure, and does not currently support TLS. Recommended is unset, and endpoint is the otlp grpc default, localhost:4317. samplingRatePerMillion int32SamplingRatePerMillion is the number of samples to collect per million spans. Recommended is unset. If unset, sampler respects its parent span's sampling rate, but otherwise never samples. VModuleConfiguration (Alias of []k8s.io/component-base/logs/api/v1.VModuleItem ) Appears in: LoggingConfiguration VModuleConfiguration is a collection of individual file names or patterns and the corresponding verbosity threshold. VerbosityLevel (Alias of uint32 ) Appears in: LoggingConfiguration VerbosityLevel represents a klog or logr verbosity threshold. CredentialProviderConfig CredentialProvide

rConfig is the configuration containing information about each exec credential provider. Kubelet reads this configuration from disk and enables each provider as specified by the CredentialProvider type. Field Description apiVersion stringkubelet.config.k8s.io/v1beta1• •

Field Description kind stringCredentialProviderConfig providers [Required] []CredentialProviderproviders is a list of credential provider plugins that will be enabled by the kubelet. Multiple providers may match against a single image, in which case credentials from all providers will be returned to the kubelet. If multiple providers are called for a single image, the results are combined. If providers return overlapping auth keys, the value from the provider earlier in this list is used. KubeletConfiguration KubeletConfiguration contains the configuration for the Kubelet Field Description apiVersion stringkubelet.config.k8s.io/v1beta1 kind stringKubeletConfiguration enableServer [Required] boolenableServer enables Kubelet's secured server. Note: Kubelet's insecure port is controlled by the readOnlyPort option. Default: true staticPodPath stringstaticPodPath is the path to the directory containing local (static) pods to run, or the path to a single static pod file. Default: "" syncF

requency meta/v1.DurationsyncFrequency is the max period between synchronizing running containers and config. Default: "1m" fileCheckFrequency meta/v1.DurationfileCheckFrequency is the duration between checking config files for new data. Default: "20s" httpCheckFrequency meta/v1.DurationhttpCheckFrequency is the duration between checking http for new data. Default: "20s" staticPodURL stringstaticPodURL is the URL for accessing static pods to run. Default: "

Field Description staticPodURLHeader map[string][]stringstaticPodURLHeader is a map of slices with HTTP headers to use when accessing the podURL. Default: nil address stringaddress is the IP address for the Kubelet to serve on (set to 0.0.0.0 for all interfaces). Default: "0.0.0.0" port int32port is the port for the Kubelet to serve on. The port number must be between 1 and 65535, inclusive. Default: 10250 readOnlyPort int32readOnlyPort is the read-only port for the Kubelet to serve on with no authentication/authorization. The port number must be between 1 and 65535, inclusive. Setting this field to 0 disables the read- only service. Default: 0 (disabled) tlsCertFile stringtlsCertFile is the file containing x509 Certificate for HTTPS. (CA cert, if any, concatenated after server cert). If tlsCertFile and tlsPrivateKeyFile are not provided, a self-signed certificate and key are generated for the public address and saved to the directory passed to the Kubelet's --cert-dir flag. Default: "