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简介 Dockerfile build run 是手动操作单个容器,假如使用微服务架构,需要启动 100 + 个容器,他们之间的依赖关系如何维护? 三个步骤:
初体验 1.Dockerfile FROM python:3.7-alpine WORKDIR /code ENV FLASK_APP app.py ENV FLASK_RUN_HOST 0.0.0.0 RUN apk add --no-cache gcc musl-dev linux-headers COPY requirements.txt requirements.txt RUN pip install -r requirements.txt COPY . . CMD ["flask", "run"] 2.Service import time import redis from flask import Flask app = Flask(__name__) cache = redis.Redis(host='redis', port=6379) def get_hit_count(): retries = 5 while True: try: return cache.incr('hits') except redis.exceptions.ConnectionError as exc: if retries == 0: raise exc retries -= 1 time.sleep(0.5) @app.route('/') def hello(): count = get_hit_count() return 'Hello World! I have been seen {} times.\n'.format(count) docker-compose.yml version: '3' services: web: build: . ports: - "5000:5000" volumes: - .:/code - logvolume01:/var/log links: - redis redis: image: redis volumes: logvolume01: {} docker-compose up Starting compose-demo_web_1 ... done Starting compose-demo_redis_1 ... done Attaching to compose-demo_redis_1, compose-demo_web_1 redis_1 | 1:C 12 Sep 2020 07:34:09.654 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo redis_1 | 1:C 12 Sep 2020 07:34:09.655 # Redis version=6.0.7, bits=64, commit=00000000, modified=0, pid=1, just started redis_1 | 1:C 12 Sep 2020 07:34:09.655 # Warning: no config file specified, using the default config. In order to specify a config file use redis-server /path/to/redis.conf redis_1 | 1:M 12 Sep 2020 07:34:09.657 * Running mode=standalone, port=6379. redis_1 | 1:M 12 Sep 2020 07:34:09.657 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128. redis_1 | 1:M 12 Sep 2020 07:34:09.657 # Server initialized redis_1 | 1:M 12 Sep 2020 07:34:09.658 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect. redis_1 | 1:M 12 Sep 2020 07:34:09.658 * Loading RDB produced by version 6.0.7 redis_1 | 1:M 12 Sep 2020 07:34:09.658 * RDB age 156 seconds redis_1 | 1:M 12 Sep 2020 07:34:09.658 * RDB memory usage when created 0.77 Mb redis_1 | 1:M 12 Sep 2020 07:34:09.658 * DB loaded from disk: 0.000 seconds web_1 | * Serving Flask app "app.py" web_1 | * Environment: production web_1 | WARNING: This is a development server. Do not use it in a production deployment. web_1 | Use a production WSGI server instead. web_1 | * Debug mode: off YML 文件规则 version: "1.0" #版本 services: #服务列表 service1: #服务配置 container_name: #容器名称 depends_on: #依赖列表 - depend1 - depend2 images: #镜像 - image1 - image2 build:. #构建目录 network: #网络 ...... service2: test2 ...... volumnes: #挂载目录列表 networks: #网络列表 configs: #其他配置 到此这篇关于Docker批量容器编排的实现的文章就介绍到这了,更多相关Docker批量容器编排内容请搜索极客世界以前的文章或继续浏览下面的相关文章希望大家以后多多支持极客世界! |
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