stack-orchestrator/app/deploy_util.py

# Copyright © 2022, 2023 Cerc

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http:#www.gnu.org/licenses/>.

import os
from typing import List
from app.deploy_types import DeployCommandContext, VolumeMapping
from app.util import get_parsed_stack_config, get_yaml, get_compose_file_dir


def _container_image_from_service(stack :str, service: str):
    # Parse the compose files looking for the image name of the specified service
    image_name = None
    parsed_stack = get_parsed_stack_config(stack)
    pods = parsed_stack["pods"]
    yaml = get_yaml()
    for pod in pods:
        pod_file_path = os.path.join(get_compose_file_dir(), f"docker-compose-{pod}.yml")
        parsed_pod_file = yaml.load(open(pod_file_path, "r"))
        if "services" in parsed_pod_file:
            services = parsed_pod_file["services"]
            if service in services:
                service_definition = services[service]
                if "image" in service_definition:
                    image_name = service_definition["image"]
    return image_name


def _volumes_to_docker(mounts: List[VolumeMapping]):
    # Example from doc: [("/", "/host"), ("/etc/hosts", "/etc/hosts", "rw")]
    result = []
    for mount in mounts:
        docker_volume = (mount.host_path, mount.container_path)
        result.append(docker_volume)
    return result


def run_container_command(ctx: DeployCommandContext, service: str, command: str, mounts: List[VolumeMapping]):
    docker = ctx.docker
    container_image = _container_image_from_service(ctx.stack, service)
    docker_volumes = _volumes_to_docker(mounts)
    if ctx.cluster_context.options.debug:
        print(f"Running this command in {service} container: {command}")
    docker_output = docker.run(
        container_image,
        ["-c", command], entrypoint="sh",
        user=f"{os.getuid()}:{os.getgid()}",
        volumes=docker_volumes
        )
    # There doesn't seem to be a way to get an exit code from docker.run()
    return (docker_output, 0)