phi/docker/resource/container.py

from time import sleep
from typing import Optional, Any, Dict, Union, List

from phi.docker.api_client import DockerApiClient
from phi.docker.resource.base import DockerResource
from phi.cli.console import print_info
from phi.utils.log import logger


class DockerContainerMount(DockerResource):
    resource_type: str = "ContainerMount"

    target: str
    source: str
    type: str = "volume"
    read_only: bool = False
    labels: Optional[Dict[str, Any]] = None


class DockerContainer(DockerResource):
    resource_type: str = "Container"

    # image (str) – The image to run.
    image: Optional[str] = None
    # command (str or list) – The command to run in the container.
    command: Optional[Union[str, List]] = None
    # auto_remove (bool) – enable auto-removal of the container when the container’s process exits.
    auto_remove: bool = True
    # detach (bool) – Run container in the background and return a Container object.
    detach: bool = True
    # entrypoint (str or list) – The entrypoint for the container.
    entrypoint: Optional[Union[str, List]] = None
    # environment (dict or list) – Environment variables to set inside the container
    environment: Optional[Union[Dict[str, Any], List]] = None
    # group_add (list) – List of additional group names and/or IDs that the container process will run as.
    group_add: Optional[List[Any]] = None
    # healthcheck (dict) – Specify a test to perform to check that the container is healthy.
    healthcheck: Optional[Dict[str, Any]] = None
    # hostname (str) – Optional hostname for the container.
    hostname: Optional[str] = None
    # labels (dict or list) – A dictionary of name-value labels
    # e.g. {"label1": "value1", "label2": "value2"})
    # or a list of names of labels to set with empty values (e.g. ["label1", "label2"])
    labels: Optional[Dict[str, Any]] = None
    # mounts (list) – Specification for mounts to be added to the container.
    # More powerful alternative to volumes.
    # Each item in the list is a DockerContainerMount object which is
    # then converted to a docker.types.Mount object.
    mounts: Optional[List[DockerContainerMount]] = None
    # network (str) – Name of the network this container will be connected to at creation time
    network: Optional[str] = None
    # network_disabled (bool) – Disable networking.
    network_disabled: Optional[str] = None
    # network_mode (str) One of:
    # bridge - Create a new network stack for the container on on the bridge network.
    # none - No networking for this container.
    # container:<name|id> - Reuse another container’s network stack.
    # host - Use the host network stack. This mode is incompatible with ports.
    # network_mode is incompatible with network.
    network_mode: Optional[str] = None
    # Platform in the format os[/arch[/variant]].
    platform: Optional[str] = None
    # ports (dict) – Ports to bind inside the container.
    # The keys of the dictionary are the ports to bind inside the container,
    # either as an integer or a string in the form port/protocol, where the protocol is either tcp, udp.
    #
    # The values of the dictionary are the corresponding ports to open on the host, which can be either:
    #   - The port number, as an integer.
    #       For example, {'2222/tcp': 3333} will expose port 2222 inside the container
    #       as port 3333 on the host.
    #   - None, to assign a random host port. For example, {'2222/tcp': None}.
    #   - A tuple of (address, port) if you want to specify the host interface.
    #       For example, {'1111/tcp': ('127.0.0.1', 1111)}.
    #   - A list of integers, if you want to bind multiple host ports to a single container port.
    #       For example, {'1111/tcp': [1234, 4567]}.
    ports: Optional[Dict[str, Any]] = None
    # remove (bool) – Remove the container when it has finished running. Default: False.
    remove: Optional[bool] = None
    # Restart the container when it exits. Configured as a dictionary with keys:
    # Name: One of on-failure, or always.
    # MaximumRetryCount: Number of times to restart the container on failure.
    # For example: {"Name": "on-failure", "MaximumRetryCount": 5}
    restart_policy: Optional[Dict[str, Any]] = None
    # stdin_open (bool) – Keep STDIN open even if not attached.
    stdin_open: Optional[bool] = None
    # stdout (bool) – Return logs from STDOUT when detach=False. Default: True.
    stdout: Optional[bool] = None
    # stderr (bool) – Return logs from STDERR when detach=False. Default: False.
    stderr: Optional[bool] = None
    # tty (bool) – Allocate a pseudo-TTY.
    tty: Optional[bool] = None
    # user (str or int) – Username or UID to run commands as inside the container.
    user: Optional[Union[str, int]] = None
    # volumes (dict or list) –
    # A dictionary to configure volumes mounted inside the container.
    # The key is either the host path or a volume name, and the value is a dictionary with the keys:
    # bind - The path to mount the volume inside the container
    # mode - Either rw to mount the volume read/write, or ro to mount it read-only.
    # For example:
    # {
    #   '/home/user1/': {'bind': '/mnt/vol2', 'mode': 'rw'},
    #   '/var/www': {'bind': '/mnt/vol1', 'mode': 'ro'}
    # }
    volumes: Optional[Union[Dict[str, Any], List]] = None
    # working_dir (str) – Path to the working directory.
    working_dir: Optional[str] = None
    devices: Optional[list] = None

    # Data provided by the resource running on the docker client
    container_status: Optional[str] = None

    def run_container(self, docker_client: DockerApiClient) -> Optional[Any]:
        from docker import DockerClient
        from docker.errors import ImageNotFound, APIError
        from rich.progress import Progress, SpinnerColumn, TextColumn

        print_info("Starting container: {}".format(self.name))
        # logger.debug()(
        #     "Args: {}".format(
        #         self.json(indent=2, exclude_unset=True, exclude_none=True)
        #     )
        # )
        try:
            _api_client: DockerClient = docker_client.api_client
            with Progress(
                SpinnerColumn(spinner_name="dots"), TextColumn("{task.description}"), transient=True
            ) as progress:
                if self.pull:
                    try:
                        pull_image_task = progress.add_task("Downloading Image...")  # noqa: F841
                        _api_client.images.pull(self.image, platform=self.platform)
                        progress.update(pull_image_task, completed=True)
                    except Exception as pull_exc:
                        logger.debug(f"Could not pull image: {self.image}: {pull_exc}")
                run_container_task = progress.add_task("Running Container...")  # noqa: F841
                container_object = _api_client.containers.run(
                    name=self.name,
                    image=self.image,
                    command=self.command,
                    auto_remove=self.auto_remove,
                    detach=self.detach,
                    entrypoint=self.entrypoint,
                    environment=self.environment,
                    group_add=self.group_add,
                    healthcheck=self.healthcheck,
                    hostname=self.hostname,
                    labels=self.labels,
                    mounts=self.mounts,
                    network=self.network,
                    network_disabled=self.network_disabled,
                    network_mode=self.network_mode,
                    platform=self.platform,
                    ports=self.ports,
                    remove=self.remove,
                    restart_policy=self.restart_policy,
                    stdin_open=self.stdin_open,
                    stdout=self.stdout,
                    stderr=self.stderr,
                    tty=self.tty,
                    user=self.user,
                    volumes=self.volumes,
                    working_dir=self.working_dir,
                    devices=self.devices,
                )
                return container_object
        except ImageNotFound as img_error:
            logger.error(f"Image {self.image} not found. Explanation: {img_error.explanation}")
            raise
        except APIError as api_err:
            logger.error(f"APIError: {api_err.explanation}")
            raise
        except Exception:
            raise

    def _create(self, docker_client: DockerApiClient) -> bool:
        """Creates the Container

        Args:
            docker_client: The DockerApiClient for the current cluster
        """
        from docker.models.containers import Container

        logger.debug("Creating: {}".format(self.get_resource_name()))
        container_object: Optional[Container] = self._read(docker_client)

        # Delete the container if it exists
        if container_object is not None:
            print_info(f"Deleting container {container_object.name}")
            self._delete(docker_client)

        try:
            container_object = self.run_container(docker_client)
            if container_object is not None:
                logger.debug("Container Created: {}".format(container_object.name))
            else:
                logger.debug("Container could not be created")
        except Exception:
            raise

        # By this step the container should be created
        # Validate that the container is running
        logger.debug("Validating container is created...")
        if container_object is not None:
            container_object.reload()
            self.container_status: str = container_object.status
            print_info("Container Status: {}".format(self.container_status))

            if self.container_status == "running":
                logger.debug("Container is running")
                return True
            elif self.container_status == "created":
                from rich.progress import Progress, SpinnerColumn, TextColumn

                with Progress(
                    SpinnerColumn(spinner_name="dots"), TextColumn("{task.description}"), transient=True
                ) as progress:
                    task = progress.add_task("Waiting for container to start", total=None)  # noqa: F841
                    while self.container_status != "created":
                        logger.debug(f"Container Status: {self.container_status}, trying again in 1 seconds")
                        sleep(1)
                        container_object.reload()
                        self.container_status = container_object.status
                    logger.debug(f"Container Status: {self.container_status}")

            if self.container_status in ("running", "created"):
                logger.debug("Container Created")
                self.active_resource = container_object
                return True

        logger.debug("Container not found")
        return False

    def _read(self, docker_client: DockerApiClient) -> Optional[Any]:
        """Returns a Container object if the container is active

        Args:
            docker_client: The DockerApiClient for the current cluster
        """
        from docker import DockerClient
        from docker.models.containers import Container

        logger.debug("Reading: {}".format(self.get_resource_name()))
        container_name: Optional[str] = self.name
        try:
            _api_client: DockerClient = docker_client.api_client
            container_list: Optional[List[Container]] = _api_client.containers.list(
                all=True, filters={"name": container_name}
            )
            if container_list is not None:
                for container in container_list:
                    if container.name == container_name:
                        logger.debug(f"Container {container_name} exists")
                        self.active_resource = container
                        return container
        except Exception:
            logger.debug(f"Container {container_name} not found")
        return None

    def _update(self, docker_client: DockerApiClient) -> bool:
        """Updates the Container

        Args:
            docker_client: The DockerApiClient for the current cluster
        """
        logger.debug("Updating: {}".format(self.get_resource_name()))
        return self._create(docker_client=docker_client)

    def _delete(self, docker_client: DockerApiClient) -> bool:
        """Deletes the Container

        Args:
            docker_client: The DockerApiClient for the current cluster
        """
        from docker.models.containers import Container
        from docker.errors import NotFound

        logger.debug("Deleting: {}".format(self.get_resource_name()))
        container_name: Optional[str] = self.name
        container_object: Optional[Container] = self._read(docker_client)
        # Return True if there is no Container to delete
        if container_object is None:
            return True

        # Delete Container
        try:
            self.active_resource = None
            self.container_status = container_object.status
            logger.debug("Container Status: {}".format(self.container_status))
            logger.debug("Stopping Container: {}".format(container_name))
            container_object.stop()
            # If self.remove is set, then the container would be auto removed after being stopped
            # If self.remove is not set, we need to manually remove the container
            if not self.remove:
                logger.debug("Removing Container: {}".format(container_name))
                try:
                    container_object.remove()
                except Exception as remove_exc:
                    logger.debug(f"Could not remove container: {remove_exc}")
        except Exception as e:
            logger.exception("Error while deleting container: {}".format(e))

        # Validate that the Container is deleted
        logger.debug("Validating Container is deleted")
        try:
            logger.debug("Reloading container_object: {}".format(container_object))
            for i in range(10):
                container_object.reload()
                logger.debug("Waiting for NotFound Exception...")
                sleep(1)
        except NotFound:
            logger.debug("Got NotFound Exception, container is deleted")

        return True

    def is_active(self, docker_client: DockerApiClient) -> bool:
        """Returns True if the container is running on the docker cluster"""
        from docker.models.containers import Container

        container_object: Optional[Container] = self.read(docker_client=docker_client)
        if container_object is not None:
            # Check if container is stopped/paused
            status: str = container_object.status
            if status in ["exited", "paused"]:
                logger.debug(f"Container status: {status}")
                return False
            return True
        return False

    def create(self, docker_client: DockerApiClient) -> bool:
        # If self.force then always create container
        if not self.force:
            # If use_cache is True and container is active then return True
            if self.use_cache and self.is_active(docker_client=docker_client):
                print_info(f"{self.get_resource_type()}: {self.get_resource_name()} already exists")
                return True

        resource_created = self._create(docker_client=docker_client)
        if resource_created:
            print_info(f"{self.get_resource_type()}: {self.get_resource_name()} created")
            return True
        logger.error(f"Failed to create {self.get_resource_type()}: {self.get_resource_name()}")
        return False