Docker Compose学习手札

version: "3.9"  # optional since v1.27.0
services:
  web:
    build: .
    ports:
      - "5000:5000"
    volumes:
      - .:/code
      - logvolume01:/var/log
    links:
      - redis
  redis:
    image: redis
volumes:
  logvolume01: {}

sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

# 国内用户可以使用以下两种方式加快下载
sudo curl -L "https://get.daocloud.io/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

[root@gzbsc001 bin]# docker-compose -version
docker-compose version 1.29.2, build 5becea4c

mkdir composetest
cd composetest

vi app.py

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)

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
EXPOSE 5000
COPY . .
CMD ["flask", "run"]

flask
redis

version: "3.9"
services:
  web:
    build: .
    ports:
      - "5000:5000"
  redis:
    image: "redis:alpine"

[root@gzbsc001 composetest]# docker-compose --help
Define and run multi-container applications with Docker.

Usage:
  docker-compose [-f <arg>...] [--profile <name>...] [options] [--] [COMMAND] [ARGS...]
  docker-compose -h|--help

Options:
  -f, --file FILE             Specify an alternate compose file
                              (default: docker-compose.yml)
                              # 指定使用的 Compose 模板文件，默认为 docker-compose.yml，可以多次指定。
  -p, --project-name NAME     Specify an alternate project name
                              (default: directory name)
  --profile NAME              Specify a profile to enable # 指定项目名称，默认将使用所在目录名称作为项目名。
  -c, --context NAME          Specify a context name # 指定上下文名称
  --verbose                   Show more output # 输出更多调试信息。
  --log-level LEVEL           Set log level (DEBUG, INFO, WARNING, ERROR, CRITICAL)
  --ansi (never|always|auto)  Control when to print ANSI control characters
  --no-ansi                   Do not print ANSI control characters (DEPRECATED)
  -v, --version               Print version and exit # 打印版本并退出。
  -H, --host HOST             Daemon socket to connect to

  --tls                       Use TLS; implied by --tlsverify
  --tlscacert CA_PATH         Trust certs signed only by this CA
  --tlscert CLIENT_CERT_PATH  Path to TLS certificate file
  --tlskey TLS_KEY_PATH       Path to TLS key file
  --tlsverify                 Use TLS and verify the remote
  --skip-hostname-check       Don't check the daemon's hostname against the
                              name specified in the client certificate
  --project-directory PATH    Specify an alternate working directory
                              (default: the path of the Compose file)
  --compatibility             If set, Compose will attempt to convert keys
                              in v3 files to their non-Swarm equivalent (DEPRECATED)
  --env-file PATH             Specify an alternate environment file

Commands:
  build              Build or rebuild services # 构建或重新构建服务
  config             Validate and view the Compose file # 验证并查看Compose文件
  create             Create services # 创建服务
  down               Stop and remove resources # 停止并删除资源
  events             Receive real time events from containers # 从容器接收实时事件
  exec               Execute a command in a running container
  help               Get help on a command
  images             List images
  kill               Kill containers
  logs               View output from containers
  pause              Pause services
  port               Print the public port for a port binding
  ps                 List containers
  pull               Pull service images
  push               Push service images
  restart            Restart services
  rm                 Remove stopped containers
  run                Run a one-off command
  scale              Set number of containers for a service
  start              Start services
  stop               Stop services
  top                Display the running processes
  unpause            Unpause services
  up                 Create and start containers
  version            Show version information and quit #版本

[root@gzbsc001 composetest]# docker-compose images 
     Container          Repository       Tag       Image Id       Size  
------------------------------------------------------------------------
composetest_redis_1   redis             alpine   5c08f13a2b92   32.4 MB 
composetest_web_1     composetest_web   latest   def65dbcd304   183.4 MB

version: "3"
services:
  webapp:
    build: ./webapp

version: "3"
services:
  webapp:
    build:
      context: ./webapp
      dockerfile: Dockerfile-test

version: "3.7"
services:
 web:
   build: .
   depends_on:
     - db
     - redis
 redis:
   image: redis
 db:
   image: postgres

dns: 8.8.8.8

dns:
  - 8.8.8.8
  - 114.114.114.114

dns_search: example.com

dns_search:
  - domain1.example.com
  - domain2.example.com

image: redis
image: ubuntu:14.04
image: tutum/influxdb
image: example-registry.com:4000/postgresql
image: a4bc65fd # 镜像id

driver: "json-file"
driver: "syslog"
driver: "none"

network_mode: "bridge"
network_mode: "host"
network_mode: "none"
network_mode: "service:[service name]"
network_mode: "container:[container name/id]"

services:
  some-service:
    networks:
      some-network:
        aliases:
         - alias1
      other-network:
        aliases:
         - alias2
networks:
  some-network:
    # Use a custom driver
    driver: custom-driver-1
  other-network:
    # Use a custom driver which takes special options
    driver: custom-driver-2

ports:
 - "3000"
 - "3000-3005"
 - "8000:8000"
 - "9090-9091:8080-8081"
 - "49100:22"
 - "127.0.0.1:8001:8001"
 - "127.0.0.1:5000-5010:5000-5010"
 - "6060:6060/udp"

version: "3.1"
services:

mysql:
  image: mysql
  environment:
    MYSQL_ROOT_PASSWORD_FILE: /run/secrets/db_root_password
  secrets:
    - db_root_password
    - my_other_secret

secrets:
  my_secret:
    file: ./my_secret.txt
  my_other_secret:
    external: true

sysctls:
  net.core.somaxconn: 1024
  net.ipv4.tcp_syncookies: 0

sysctls:
  - net.core.somaxconn=1024
  - net.ipv4.tcp_syncookies=0

  ulimits:
    nproc: 65535
    nofile:
      soft: 20000
      hard: 40000