scripts/longvideoapi/longvideoapi_grayscale_update.py

import sys
import time
import requests
import utils
import logging
import os
import docker
import longvideoapi_config

health_instances = []
ess_instances = []
remove_container_instances = []


def server_health_check(ecs_client, instance_id):
    """
    服务健康检查
    :param ecs_client: 客户端连接
    :param instance_id: instanceId
    :return:
    """
    global health_instances
    ip_address = utils.get_ip_address(ecs_client=ecs_client, instance_id=instance_id)
    while True:
        health_check_url = f"http://{ip_address}:8080/longvideoapi/test"
        try:
            http_code = requests.get(health_check_url).status_code
        except:
            logging.info(f"images is downloading ip：{ip_address}")
            http_code = 0

        if http_code == 200:
            health_instances.append((instance_id, ip_address))
            logging.info(f"health check success, instance: {instance_id}/{ip_address}")
            break
        else:
            time.sleep(10)


def remove_container_image(ecs_client, instance_id, container_name_list):
    """
    移除旧容器并删除旧镜像
    :param ecs_client: 客户端连接
    :param instance_id: instanceId type-string
    :param container_name_list: 容器名称 type-list
    :return:
    """
    ip_address = utils.get_ip_address(ecs_client=ecs_client, instance_id=instance_id)
    logging.info(f"服务器信息：{instance_id}/{ip_address}")
    client = docker.DockerClient(base_url=f'tcp://{ip_address}:2375', timeout=60)

    # 移除旧的容器
    container_remove_retry = 3
    i = 0
    while True:
        if i >= container_remove_retry:
            logging.error(f"容器不存在或者无法删除当前容器, instance = {instance_id}/{ip_address}")
            sys.exit()
        try:
            flag = False
            for container_name in container_name_list:
                try:
                    container_id = client.containers.get(container_name)
                    container_id.remove(force=True)
                    flag = True
                    break
                except:
                    continue
            if flag:
                break
        except Exception as e:
            i += 1

    # 删除旧镜像
    images_remove_retry = 3
    j = 0
    while True:
        if j >= images_remove_retry:
            logging.error(f"镜像不存在，无法获取到镜像ID, instance = {instance_id}/{ip_address}")
            sys.exit()
        try:
            images = client.images.list()
            for image in images:
                client.images.remove(force=True, image=image.tags[0])
                time.sleep(2)
            global remove_container_instances
            remove_container_instances.append(instance_id)
            break
        except Exception as e:
            j += 1

def update_instance(ecs_client, alb_client, instance_id, version, port):
    """
    线上机器更新
    :param ecs_client:
    :param alb_client: alb客户端连接
    :param instance_id: instanceId
    :param version: 版本标记
    :param port: 后端服务器使用的端口
    :return:
    """
    logging.info(f"update instance: {instance_id}")
    # 1. 摘流量，将权重降为0
    utils.update_server_group_servers_attribute(alb_client=alb_client,
                                                server_group_id_list=longvideoapi_config.server_group_id_list,
                                                instance_id_list=[instance_id],
                                                weight_list=[(0, 20)],
                                                port=port)
    logging.info(f"Set weight to 0 for instance: {instance_id}")

    # 2. 移除旧容器并删除旧镜像
    global remove_container_instances
    remove_container_instances = []
    container_name_list = ['vlogapi', 'longvideoapi']
    remove_container_image(ecs_client, instance_id, container_name_list)
    logging.info(f"remove container & images finished, instance: {remove_container_instances},"
                 f" count: {len(remove_container_instances)}")
    if len(remove_container_instances) == 0:
        logging.error(f"remove container image failed|")
        sys.exit()

    # 3. 发送启动脚本到机器上
    utils.send_file_to_ecs(ecs_client=ecs_client, instance_id_list=[instance_id], **longvideoapi_config.start_sh)
    logging.info(f"send start shell file finished, instance: {instance_id}")

    # 4. 启动服务
    server_start_sh = os.path.join(longvideoapi_config.start_sh['target_dir'], longvideoapi_config.start_sh['name'])
    server_start_command = f"sh {server_start_sh} {version}"
    utils.run_command(ecs_client=ecs_client, instance_ids=[instance_id], command=server_start_command)

    # 5. 探活
    global health_instances
    health_instances = []
    server_health_check(ecs_client, instance_id)
    logging.info(f"health instances: {health_instances}, count: {len(health_instances)}")

    # 6. 挂载流量
    if len(health_instances) == 0:
        logging.info(f"health instances: {health_instances}, count: {len(health_instances)}")
        sys.exit()
    # 机器探活成功
    time.sleep(20)
    health_instance_ids = [instance_id for instance_id, _ in health_instances]
    add_weight_list = [(10, 5), (20, 5), (40, 5), (60, 5), (80, 5), (100, 5)]
    # add_weight_list = [(10, 10), (20, 10), (40, 10), (60, 10), (80, 10), (100, 10)]
    utils.update_server_group_servers_attribute(alb_client=alb_client,
                                                server_group_id_list=longvideoapi_config.server_group_id_list,
                                                instance_id_list=health_instance_ids,
                                                weight_list=add_weight_list,
                                                port=port)
    logging.info(f"finished instances: {health_instances}, count: {len(health_instances)}")


def main():
    try:
        version = sys.argv[1]
        alb_client = utils.connect_alb_client(
            access_key_id=longvideoapi_config.alb_client_params['access_key_id'],
            access_key_secret=longvideoapi_config.alb_client_params['access_key_secret'],
            endpoint=longvideoapi_config.alb_client_params['endpoint']
        )

        ecs_client = utils.connect_client(access_key_id=longvideoapi_config.ecs_client_params['access_key_id'],
                                          access_key_secret=longvideoapi_config.ecs_client_params[
                                                 'access_key_secret'],
                                          region_id=longvideoapi_config.ecs_client_params['region_id'])

        # 1. 获取ALB下所有机器
        online_instance_ids = utils.list_server_group_servers(alb_client=alb_client,
                                                              server_group_id=longvideoapi_config.server_group_id_list[0])
        online_instance_count = len(online_instance_ids)
        logging.info(f"online instance count: {online_instance_count}.")
        logging.info(f"online instance ids: {online_instance_ids}")

        # 2. 对其中一台机器进行更新
        instance_id = online_instance_ids[0]
        logging.info(f"update instance start ...")
        update_instance(ecs_client=ecs_client, alb_client=alb_client, instance_id=instance_id, version=version, port=longvideoapi_config.port)
        logging.info(f"update instances end!")

    except Exception as e:
        logging.error(e)
        sys.exit()


if __name__ == '__main__':
    main()