docker

업데이트 된 Docker 이미지를 ECS의 스테이징 서비스에 배포하기위한 스크립트 를 생성 하여 해당 작업 정의가 현재 버전의 Docker 이미지를 참조하도록했습니다. 모범 사례를 따르고 있는지 확실하지 않으므로 피드백을 환영합니다.

스크립트가 작동하려면 deploymentConfiguration.minimumHealthyPercentECS가 업데이트 된 작업 정의를 배포 할 인스턴스를 훔칠 수 있도록 예비 ECS 인스턴스 또는 값 이 필요합니다 .

내 알고리즘은 다음과 같습니다.

1. Git 개정으로 작업 정의의 컨테이너에 해당하는 Docker 이미지에 태그를 지정합니다.
2. Docker 이미지 태그를 해당 레지스트리로 푸시합니다.
3. 작업 정의 패밀리에서 이전 작업 정의를 등록 취소합니다.
4. 현재 Git 개정으로 태그가 지정된 Docker 이미지를 참조하여 새 작업 정의를 등록합니다.
5. 새 작업 정의를 사용하도록 서비스를 업데이트합니다.

내 코드는 아래에 붙여 넣었습니다.

deploy-ecs

#!/usr/bin/env python3
import subprocess
import sys
import os.path
import json
import re
import argparse
import tempfile

_root_dir = os.path.abspath(os.path.normpath(os.path.dirname(__file__)))
sys.path.insert(0, _root_dir)
from _common import *


def _run_ecs_command(args):
    run_command(['aws', 'ecs', ] + args)


def _get_ecs_output(args):
    return json.loads(run_command(['aws', 'ecs', ] + args, return_stdout=True))


def _tag_image(tag, qualified_image_name, purge):
    log_info('Tagging image \'{}\' as \'{}\'...'.format(
        qualified_image_name, tag))
    log_info('Pulling image from registry in order to tag...')
    run_command(
        ['docker', 'pull', qualified_image_name], capture_stdout=False)
    run_command(['docker', 'tag', '-f', qualified_image_name, '{}:{}'.format(
        qualified_image_name, tag), ])
    log_info('Pushing image tag to registry...')
    run_command(['docker', 'push', '{}:{}'.format(
        qualified_image_name, tag), ], capture_stdout=False)
    if purge:
        log_info('Deleting pulled image...')
        run_command(
            ['docker', 'rmi', '{}:latest'.format(qualified_image_name), ])
        run_command(
            ['docker', 'rmi', '{}:{}'.format(qualified_image_name, tag), ])


def _register_task_definition(task_definition_fpath, purge):
    with open(task_definition_fpath, 'rt') as f:
        task_definition = json.loads(f.read())

    task_family = task_definition['family']

    tag = run_command([
        'git', 'rev-parse', '--short', 'HEAD', ], return_stdout=True).strip()
    for container_def in task_definition['containerDefinitions']:
        image_name = container_def['image']
        _tag_image(tag, image_name, purge)
        container_def['image'] = '{}:{}'.format(image_name, tag)

    log_info('Finding existing task definitions of family \'{}\'...'.format(
        task_family
    ))
    existing_task_definitions = _get_ecs_output(['list-task-definitions', ])[
        'taskDefinitionArns']
    for existing_task_definition in [
        td for td in existing_task_definitions if re.match(
            r'arn:aws:ecs+:[^:]+:[^:]+:task-definition/{}:\d+'.format(
                task_family),
            td)]:
        log_info('Deregistering task definition \'{}\'...'.format(
            existing_task_definition))
        _run_ecs_command([
            'deregister-task-definition', '--task-definition',
            existing_task_definition, ])

    with tempfile.NamedTemporaryFile(mode='wt', suffix='.json') as f:
        task_def_str = json.dumps(task_definition)
        f.write(task_def_str)
        f.flush()
        log_info('Registering task definition...')
        result = _get_ecs_output([
            'register-task-definition',
            '--cli-input-json', 'file://{}'.format(f.name),
        ])

    return '{}:{}'.format(task_family, result['taskDefinition']['revision'])


def _update_service(service_fpath, task_def_name):
    with open(service_fpath, 'rt') as f:
        service_config = json.loads(f.read())
    services = _get_ecs_output(['list-services', ])[
        'serviceArns']
    for service in [s for s in services if re.match(
        r'arn:aws:ecs:[^:]+:[^:]+:service/{}'.format(
            service_config['serviceName']),
        s
    )]:
        log_info('Updating service with new task definition...')
        _run_ecs_command([
            'update-service', '--service', service,
            '--task-definition', task_def_name,
        ])


parser = argparse.ArgumentParser(
    description="""Deploy latest Docker image to staging server.
The task definition file is used as the task definition, whereas
the service file is used to configure the service.
""")
parser.add_argument(
    'task_definition_file', help='Your task definition JSON file')
parser.add_argument('service_file', help='Your service JSON file')
parser.add_argument(
    '--purge_image', action='store_true', default=False,
    help='Purge Docker image after tagging?')
args = parser.parse_args()

task_definition_file = os.path.abspath(args.task_definition_file)
service_file = os.path.abspath(args.service_file)

os.chdir(_root_dir)

task_def_name = _register_task_definition(
    task_definition_file, args.purge_image)
_update_service(service_file, task_def_name)

_common.py

import sys
import subprocess


__all__ = ['log_info', 'handle_error', 'run_command', ]


def log_info(msg):
    sys.stdout.write('* {}\n'.format(msg))
    sys.stdout.flush()


def handle_error(msg):
    sys.stderr.write('* {}\n'.format(msg))
    sys.exit(1)


def run_command(
        command, ignore_error=False, return_stdout=False, capture_stdout=True):
    if not isinstance(command, (list, tuple)):
        command = [command, ]
    command_str = ' '.join(command)
    log_info('Running command {}'.format(command_str))
    try:
        if capture_stdout:
            stdout = subprocess.check_output(command)
        else:
            subprocess.check_call(command)
            stdout = None
    except subprocess.CalledProcessError as err:
        if not ignore_error:
            handle_error('Command failed: {}'.format(err))
    else:
        return stdout.decode() if return_stdout else None

답변