Docker Compose container orchestration configuration details! !

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definition

Docker Compose is a container orchestration tool used to define and run applications composed of multiple containers. Using compose,
each service of the application can be defined through the yaml file, and the creation and startup of the application can be completed by a single command. Allows users to define a group of associated containers in a template (yaml format), which will sort the startup priority according to parameters such as -link.

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One: Docker Compos container orchestration

YUML is a very intuitive data serialization format for markup language

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1.1: Docker Compose configuration common fields

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1.2: Docker Compose commonly used commands

docker-compose -h                           # 查看帮助
docker-compose up                           # 创建并运行所有容器
docker-compose up -d                        # 创建并后台运行所有容器
docker-compose ps                           # 显示所用容器信息
docker-compose -f docker-compose.yml up -d  # 指定模板
docker-compose down                         # 停止并删除容器、网络、卷、镜像。
docker-compose rm                           # 删除容器
docker-compose logs                         # 查看容器输出日志
docker-compose pull                         # 拉取依赖镜像
dokcer-compose config                       # 检查配置
dokcer-compose config -q                    # 验证yaml配置文件是否正确，有问题才有输出
docker-compose pause                        # 暂停容器
docker-compose unpause                      # 恢复暂停
docker-compose restart                      # 重启服务
docker-compose start                        # 启动服务
docker-compose stop                :         # 停止服务

1.3: Compose command description

Basic usage format

docker-compose [options][COMMAND][ARGS...]

docker-compose option

--verbose    输出更多调试信息
--version     打印版本并退出
-f，--file FILE使用特定的compose模板文件，默认为docker-compose.yml
-p，--project-name NAME指定项目名称，默认使用目录名称

2: Arrangement examples

2.1: Download docker-compose

[root@localhost ~]# rz -E
rz waiting to receive.

#给下载好的docker-compose赋予权限
[root@localhost ~]# chmod +x docker-compose 

#将下载好的docker-compose复制到/usr/local/bin目录下
[root@localhost ~]# cp -p docker-compose /usr/local/bin/

2.2: Create a working directory

(Copy the nginx software package to the nginx directory)

[root@localhost compose_nginx]# mkdir nginx
[root@localhost compose_nginx]# cd nginx/
[root@localhost nginx]# vim Dockerfile

FROM centos:7
RUN yum -y update
RUN yum -y install pcre-devel zlib-devel gcc gcc-c++ make
RUN useradd -M -s /sbin/nologin nginx
ADD nginx-1.12.0.tar.gz /usr/local/src
WORKDIR /usr/local/src
WORKDIR nginx-1.12.0
RUN ./configure \
--prefix=/usr/local/nginx \
--user=nginx \
--group=nginx \
--with-http_stub_status_module && make && make install
ENV PATH /usr/local/nginx/sbin:$PATH
EXPOSE 80
EXPOSE 443
RUN echo "daemon off;">>/usr/local/nginx/conf/nginx.conf
ADD run.sh /run.sh
RUN chmod 755 /run.sh
CMD ["/run.sh"]

'//编写启动脚本'
[root@localhost nginx]# vim run.sh
#!/bin/bash
/usr/local/nginx/sbin/nginx

#把nginx包复制到nginx目录
[root@localhost nginx]# ls
Dockfile  nginx-1.12.0.tar.gz  run.sh

2.3: Create and edit yml files

[root@localhost nginx]# cd ..
[root@localhost compose_nginx]# vim docker-compose.yml 

'//冒号后面注意有空格'

version: '3'
services:
  nginx:
    hostname: nginx
    build:
      context: ./nginx
      dockerfile: Dockerfile
    ports：
     - 1216:80
     - 1217:443
    networks:
     - cluster
    volumes:
     - ./wwwroot:/usr/local/nginx/html
networks:
  cluster:

2.4: execute open, tree view structure

#执行开启
[root@localhost compose_nginx]# docker-compose -f docker-compose.yml up -d

[root@localhost compose_nginx]# ls
docker-compose.yml  nginx  wwwroot

#在站点目录下创建一个网页，用浏览器访问是否可以正常显示
[root@localhost compose_nginx]# cd wwwroot/
'//编写站点信息'
[root@localhost wwwroot]# vim index.html

<h1>this is shuai web</h1>

#下载tree查看组织结构
[root@localhost compose_nginx]# yum install tree -y

[root@localhost compose_nginx]# tree ./
./
├── docker-compose.yml
├── nginx
│   ├── Dockerfile
│   ├── nginx-1.12.0.tar.gz
│   └── run.sh
└── wwwroot
    └── index.html

Check whether the image and container are both creatively successful:

[root@localhost compose_nginx]# docker images
REPOSITORY            TAG                 IMAGE ID            CREATED             SIZE
compose_nginx_nginx   latest              178d32644ae3        13 minutes ago      480MB
centos                7                   7e6257c9f8d8        6 weeks ago         203MB

#查看容器
[root@localhost compose_nginx]# docker ps -a
CONTAINER ID        IMAGE                 COMMAND             CREATED             STATUS              PORTS                                         NAMES
0874ae4fe802        compose_nginx_nginx   "/run.sh"           13 minutes ago      Up 13 minutes       0.0.0.0:1216->80/tcp, 0.0.0.0:1217->443/tcp   compose_nginx_nginx_1
8fb37f271c31        centos:7              "/bin/bash"         2 hours ago         Up 2 hours                                                      niu

2.5: Browser access (the IP address of the machine is): 20.0.0.42:1216

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Thank you for watching this experiment.