5-容器单机编排工具 Docker Compose
5 容器单机编排工具 Docker Compose
5.1 Docker Compose介绍
当在宿主机启动较多的容器时候，如果都是手动操作会觉得比较麻烦而且容易出错，此时推荐使用docker 单机编排工具 docker-compose。
docker-compose 是 docker 容器的一种单机编排服务，docker-compose 是一个管理多个容器的工具，比如: 可以解决容器之间的依赖关系，就像启动一个nginx 前端服务的时候会调用后端的tomcat，那就得先启动tomcat，但是启动tomcat 容器还需要依赖数据库，那就还得先启动数据库，dockercompose 可以用来解决这样的嵌套依赖关系，并且可以替代docker命令对容器进行创建、启动和停止等手工的操作。
因此，如果说docker命令就像linux的命令，docker compose就像shell脚本，可以自动的执行容器批量操作，从而实现自动化的容器管理，或者说docker命令相当于ansible命令，那么docker compose文件，就相当于ansible-playbook的yaml文件。
docker-compose 项目是Docker 官方的开源项目，负责实现对Docker 容器集群的快速编排，dockercompose 将所管理的容器分为三层，分别是工程（project），服务（service）以及容器（container）。
Github地址: https://github.com/docker/compose
官方地址: https://docs.docker.com/compose/
5.2 安装和准备
5.2.1 安装Docker Compose
5.2.1.1 方法1: 在线安装，通过pip安装
python-pip 包将安装一个 pip 的命令，pip 命令是一个python 安装包的安装工具，其类似于ubuntu 的apt 或者 redhat 的yum，但是pip 只安装 python 相关的安装包，可以在多种操作系统安装和使用pip。
此方式当前安装的版本较新，为docker_compose-1.25.3，推荐使用。
Ubuntu:
# apt update
# apt install -y python-pip
CentOS:
# yum install epel-release
# yum install -y python-pip
# pip install --upgrade pip
范例: 基于python3 安装 docker-compose
#配置加速
[root@ubuntu2004 ~]#mkdir ~/.pip
[root@ubuntu2004 ~]#cat > ~/.pip/pip.conf <<-EOF
[global]
index-url = https://pypi.tuna.tsinghua.edu.cn/simple
EOF
[root@ubuntu2004 ~]#apt -y install python3-pip
[root@ubuntu2004 ~]#pip3 install --upgrade pip
[root@ubuntu2004 ~]#pip3 install docker-compose
[root@ubuntu2004 ~]#docker-compose --version
docker-compose version 1.27.4, build unknown
#基于python2安装docker-compose
[root@ubuntu1804 ~]#apt -y install python-pip
[root@ubuntu1804 ~]#pip install docker-compose
[root@ubuntu1804 ~]#docker-compose --version
docker-compose version 1.25.3, build unknown
5.2.1.2 方法2: 在线直接从包仓库安装
此方法安装的版本较旧，不推荐使用
#ubuntu安装,此为默认版本
[root@ubuntu1804 ~]#apt -y install docker-compose
[root@ubuntu1804 ~]#docker-compose --version
docker-compose version 1.17.1, build unknown
#CentOS7安装，依赖EPEL源
[root@centos7 ~]#yum -y install docker-compose
[root@centos7 ~]#docker-compose --version
docker-compose version 1.18.0, buil 8dd22a9
5.2.1.3 方法3: 离线安装，直接从github或国内镜像站下载安装对应版本
参看说明: https://github.com/docker/compose/releases
此方法安装版本可方便指定，推荐方法，但网络下载较慢
[root@ubuntu1804 ~]#curl -L https://github.com/docker/compose/releases/download/1.25.3/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose
root@ubuntu2204:~# wget -O /usr/local/bin/docker-compose https://github.com/docker/compose/releases/download/v2.24.6/docker-compose-linux-x86_64
#从国内镜像站下载
[root@ubuntu1804 ~]#curl -L https://get.daocloud.io/docker/compose/releases/download/1.25.3/dockercompose-$(uname -s)-$(uname -m) -o /usr/local/bin/docker-compose
[root@ubuntu1804 ~]#chmod +x /usr/local/bin/docker-compose
5.2.2 查看命令格式
官方文档: https://docs.docker.com/compose/reference/
docker-compose --help
Define and run multi-container applications with Docker.
Usage:
docker-compose [-f <arg>...] [options] [COMMAND] [ARGS...]
docker-compose -h|--help
#选项说明:
-f，-file FILE #指定Compose 模板文件，默认为docker-compose.yml
-p，-project-name NAME #指定项目名称，默认将使用当前所在目录名称作为项目名。
--verbose #显示更多输出信息
--log-level LEVEL #定义日志级别 (DEBUG, INFO, WARNING, ERROR, CRITICAL)
--no-ansi #不显示ANSI 控制字符
-v, --version #显示版本
#以下为命令选项，需要在docker-compose.yml|yaml 文件所在在目录里执行
config -q #查看当前配置，没有错误不输出任何信息
up #创建并启动容器
build #构建镜像
bundle #从当前docker compose 文件生成一个以<当前目录>为名称的json格式的Docker Bundle 备份文件
create #创建服务
down #停止和删除所有容器、网络、镜像和卷
events #从容器接收实时事件，可以指定json 日志格式
exec #进入指定容器进行操作
help #显示帮助细信息
images #显示镜像信息
kill #强制终止运行中的容器
logs #查看容器的日志
pause #暂停服务
port #查看端口
ps #列出容器
pull #重新拉取镜像，镜像发生变化后，需要重新拉取镜像
push #上传镜像
restart #重启服务
rm #删除已经停止的服务
run #一次性运行容器
scale #设置指定服务运行的容器个数，新版已废弃
start #启动服务
stop #停止服务
top #显示容器运行状态
unpause #取消暂定
范例:
[root@ubuntu1804 ~]#docker-compose --version
docker-compose version 1.25.3, build d4d1b42b
5.2.3 docker compose 文件格式
官方文档: https://docs.docker.com/compose/compose-file/
docker compose 文件是一个yaml格式的文件，所以注意行首的缩进很严格
默认docker-compose命令会调用当前目录下的docker-compose.yml的文件，因此一般执行docker-compose命令前先进入docker-compose.yml文件所在目录。
docker compose文件的格式很不同版本，版本不同，语法和格式有所不同，参看以下列表 https://docs.docker.com/compose/compose-file/compose-file-v3/
| Compose file format | Docker Engine release |
|---|---|
| 3.8 | 19.03.0+ |
| 3.7 | 18.06.0+ |
| 3.6 | 18.02.0+ |
| 3.5 | 17.12.0+ |
| 3.4 | 17.09.0+ |
| 3.3 | 17.06.0+ |
| 3.2 | 17.04.0+ |
| 3.1 | 1.13.1+ |
| 3.0 | 1.13.0+ |
| 2.4 | 17.12.0+ |
| 2.3 | 17.06.0+ |
| 2.2 | 1.13.0+ |
| 2.1 | 1.12.0+ |
| 2.0 | 1.10.0+ |
docker compose版本众多，以下通过具体示例说明docker compose的使用方法
5.3 从 docker compose 启动单个容器
注意: 使用Docker compose之前，先要安装docker
5.3.1 创建 docker compose文件
docker compose 文件可在任意目录，创建文件名为docker-compose.yml 配置文件，要注意前后的缩进
root@ubuntu2204:~# docker-compose -v
docker-compose version 1.25.4, build 8d51620a
root@ubuntu2204:~# mkdir /data/docker-compose -p
root@ubuntu2204:~# cd /data/docker-compose
root@ubuntu2204:/data/docker-compose# vim docker-compose.yml
root@ubuntu2204:/data/docker-compose# cat docker-compose.yml
service-nginx-web:
image: harbor.zhou.org/example/nginx-centos7-base:1.6.1
container_name: nginx-web
expose:
- 80
- 443
ports:
- "80:80"
- "443:443"
5.3.2 查看配置和格式检查
root@ubuntu2204:/data/docker-compose# docker-compose config
name: docker-compose
services:
nginx-web:
container_name: nginx-web
expose:
- "80"
- "443"
image: nginx:1.21.1-alpine
networks:
default: null
ports:
- mode: ingress
target: 80
published: "80"
protocol: tcp
- mode: ingress
target: 443
published: "443"
protocol: tcp
networks:
default:
name: docker-compose_default
root@ubuntu2204:/data/docker-compose# docker-compose config -q
5.3.3 启动容器
注意: 必须要在docker compose文件所在的目录执行
#前台启动
root@ubuntu2204:~# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
centos-nginx c71.9 8d5cfed63c2b 8 years ago 273MB
root@ubuntu2204:/data/docker-compose# cat docker-compose.yml
service-nginx-web:
image: centos-nginx:c71.9
container_name: nginx-web
expose:
- 80
- 443
ports:
- "80:80"
- "443:443"
root@ubuntu2204:/data/docker-compose# docker-compose up
Creating nginx-web ... done
Attaching to nginx-web
#以上是前台执行不退出
5.3.4 验证docker compose执行结果
#上面命令是前台执行，所以要查看结果，可以再开一个终端窗口进行观察
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
be54e1d43834 centos-nginx:c71.9 "nginx -g 'daemon of…" About a minute ago Up About a minute 0.0.0.0:80->80/tcp, :::80->80/tcp, 0.0.0.0:443->443/tcp, :::443->443/tcp nginx-web
root@ubuntu2204:~# docker-compose ps
ERROR:
Can't find a suitable configuration file in this directory or any
parent. Are you in the right directory?
Supported filenames: docker-compose.yml, docker-compose.yaml
root@ubuntu2204:~# cd /data/docker-compose/
root@ubuntu2204:/data/docker-compose# docker-compose ps
Name Command State Ports
--------------------------------------------------------------------------------------------------
nginx-web nginx -g daemon off; Up 0.0.0.0:443->443/tcp,:::443->443/tcp,
0.0.0.0:80->80/tcp,:::80->80/tcp
root@ubuntu2204:/data/docker-compose# curl 127.0.0.1
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
root@ubuntu2204:/data/docker-compose# docker-compose images
Container Repository Tag Image Id Size
----------------------------------------------------------
nginx-web centos-nginx c71.9 8d5cfed63c2b 272.9 MB
root@ubuntu2204:/data/docker-compose# docker-compose exec service-nginx-web bash
[root@be54e1d43834 /]#
[root@be54e1d43834 ~]# tail /var/log/nginx/access.log
172.17.0.1 - - [16/Feb/2024:04:26:38 +0000] "GET / HTTP/1.1" 200 612 "-" "curl/7.81.0" "-"
5.3.5 结束前台执行
root@ubuntu2204:/data/docker-compose# docker-compose up
Creating nginx-web ... done
Attaching to nginx-web #ctrl+c键，结束容器
^CGracefully stopping... (press Ctrl+C again to force)
Stopping nginx-web ... done
root@ubuntu2204:/data/docker-compose# docker-compose ps
Name Command State Ports
-------------------------------------------------
nginx-web nginx -g daemon off; Exit 0
root@ubuntu2204:/data/docker-compose# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
be54e1d43834 centos-nginx:c71.9 "nginx -g 'daemon of…" 10 minutes ago Exited (0) 24 seconds ago nginx-web
root@ubuntu2204:/data/docker-compose# docker-compose start
Starting service-nginx-web ... done
root@ubuntu2204:/data/docker-compose# docker-compose ps
Name Command State Ports
--------------------------------------------------------------------------------------------------
nginx-web nginx -g daemon off; Up 0.0.0.0:443->443/tcp,:::443->443/tcp,
0.0.0.0:80->80/tcp,:::80->80/tcp
#关闭容器
root@ubuntu2204:/data/docker-compose# docker-compose kill
Killing nginx-web ... done
root@ubuntu2204:/data/docker-compose# docker-compose ps
Name Command State Ports
---------------------------------------------------
nginx-web nginx -g daemon off; Exit 137
5.3.6 删除容器
root@ubuntu2204:/data/docker-compose# docker-compose ps
Name Command State Ports
---------------------------------------------------
nginx-web nginx -g daemon off; Exit 137
#只删除停止的容器
root@ubuntu2204:/data/docker-compose# docker-compose rm
Going to remove nginx-web
Are you sure? [yN] y
Removing nginx-web ... done
root@ubuntu2204:/data/docker-compose# docker-compose up -d
Creating nginx-web ... done
root@ubuntu2204:/data/docker-compose# docker-compose rm
No stopped containers
#停止并删除容器及镜像
root@ubuntu2204:/data/docker-compose# docker-compose ps -a
Name Command State Ports
--------------------------------------------------------------------------------------------------
nginx-web nginx -g daemon off; Up 0.0.0.0:443->443/tcp,:::443->443/tcp,
0.0.0.0:80->80/tcp,:::80->80/tcp
root@ubuntu2204:/data/docker-compose# docker-compose down
Stopping nginx-web ... done
Removing nginx-web ... done
root@ubuntu2204:/data/docker-compose# docker-compose ps
Name Command State Ports
------------------------------
root@ubuntu2204:/data/docker-compose# docker-compose ps -a
Name Command State Ports
------------------------------
#也会自动删除镜像
root@ubuntu2204:/data/docker-compose# docker-compose images
Container Repository Tag Image Id Size
----------------------------------------------
5.3.7 后台执行
root@ubuntu2204:/data/docker-compose# docker-compose up -d
Creating nginx-web ... done
root@ubuntu2204:/data/docker-compose# docker-compose ps
Name Command State Ports
--------------------------------------------------------------------------------------------------
nginx-web nginx -g daemon off; Up 0.0.0.0:443->443/tcp,:::443->443/tcp,
0.0.0.0:80->80/tcp,:::80->80/tcp
root@ubuntu2204:/data/docker-compose# curl 127.0.0.1
5.3.8 停止和启动与日志查看
root@ubuntu2204:/data/docker-compose# docker-compose stop
Stopping nginx-web ... done
root@ubuntu2204:/data/docker-compose# docker-compose ps
Name Command State Ports
-------------------------------------------------
nginx-web nginx -g daemon off; Exit 0
root@ubuntu2204:/data/docker-compose# docker-compose start
Starting service-nginx-web ... done
root@ubuntu2204:/data/docker-compose# docker-compose ps
Name Command State Ports
--------------------------------------------------------------------------------------------------
nginx-web nginx -g daemon off; Up 0.0.0.0:443->443/tcp,:::443->443/tcp,
0.0.0.0:80->80/tcp,:::80->80/tcp
root@ubuntu2204:/data/docker-compose# docker-compose restart
Restarting nginx-web ... done
root@ubuntu2204:/data/docker-compose# docker-compose ps
Name Command State Ports
--------------------------------------------------------------------------------------------------
nginx-web nginx -g daemon off; Up 0.0.0.0:443->443/tcp,:::443->443/tcp,
0.0.0.0:80->80/tcp,:::80->80/tcp
#执行上面操作时，可以同时开一个终端，观察日事件
root@ubuntu2204:/data/docker-compose# docker-compose events
2024-02-16 04:44:27.278633 container kill da17452399525584eeb43909c54a200b021e9b62ede6245828660e2356fe128b (image=centos-nginx:c71.9, name=nginx-web)
2024-02-16 04:44:27.725588 container stop da17452399525584eeb43909c54a200b021e9b62ede6245828660e2356fe128b (image=centos-nginx:c71.9, name=nginx-web)
2024-02-16 04:44:27.731206 container die da17452399525584eeb43909c54a200b021e9b62ede6245828660e2356fe128b (image=centos-nginx:c71.9, name=nginx-web)
2024-02-16 04:44:28.336162 container start da17452399525584eeb43909c54a200b021e9b62ede6245828660e2356fe128b (image=centos-nginx:c71.9, name=nginx-web)
2024-02-16 04:44:28.336393 container restart da17452399525584eeb43909c54a200b021e9b62ede6245828660e2356fe128b (image=centos-nginx:c71.9, name=nginx-web)
#以json格式显示日志
root@ubuntu2204:/data/docker-compose# docker-compose events --json
{"time": "2024-02-16T05:00:43.109948", "type": "container", "action": "kill", "id": "da17452399525584eeb43909c54a200b021e9b62ede6245828660e2356fe128b", "service": "service-nginx-web", "attributes": {"name": "nginx-web", "image": "centos-nginx:c71.9"}}
{"time": "2024-02-16T05:00:43.634358", "type": "container", "action": "stop", "id": "da17452399525584eeb43909c54a200b021e9b62ede6245828660e2356fe128b", "service": "service-nginx-web", "attributes": {"name": "nginx-web", "image": "centos-nginx:c71.9"}}
{"time": "2024-02-16T05:00:43.640445", "type": "container", "action": "die", "id": "da17452399525584eeb43909c54a200b021e9b62ede6245828660e2356fe128b", "service": "service-nginx-web", "attributes": {"name": "nginx-web", "image": "centos-nginx:c71.9"}}
{"time": "2024-02-16T05:00:44.174242", "type": "container", "action": "start", "id": "da17452399525584eeb43909c54a200b021e9b62ede6245828660e2356fe128b", "service": "service-nginx-web", "attributes": {"name": "nginx-web", "image": "centos-nginx:c71.9"}}
{"time": "2024-02-16T05:00:44.174288", "type": "container", "action": "restart", "id": "da17452399525584eeb43909c54a200b021e9b62ede6245828660e2356fe128b", "service": "service-nginx-web", "attributes": {"name": "nginx-web", "image": "centos-nginx:c71.9"}}
5.3.9 暂停和恢复
root@ubuntu2204:/data/docker-compose# docker-compose pause
Pausing nginx-web ... done
root@ubuntu2204:/data/docker-compose# docker-compose ps
Name Command State Ports
--------------------------------------------------------------------------------------------------
nginx-web nginx -g daemon off; Paused 0.0.0.0:443->443/tcp,:::443->443/tcp,
0.0.0.0:80->80/tcp,:::80->80/tcp
root@ubuntu2204:/data/docker-compose# curl -m 1 127.0.0.1
curl: (28) Operation timed out after 1008 milliseconds with 0 bytes received
root@ubuntu2204:/data/docker-compose# docker-compose unpause
Unpausing nginx-web ... done
root@ubuntu2204:/data/docker-compose# docker-compose ps
Name Command State Ports
--------------------------------------------------------------------------------------------------
nginx-web nginx -g daemon off; Up 0.0.0.0:443->443/tcp,:::443->443/tcp,
0.0.0.0:80->80/tcp,:::80->80/tcp
root@ubuntu2204:/data/docker-compose# curl -m 1 127.0.0.1
5.4 从 docker compose 启动多个容器
5.4.1 编辑 docker-compose 文件并使用数据卷
注意: 同一个文件 ，数据卷的优先级比镜像内的文件优先级高
[root@ubuntu1804 docker-compose]#vim docker-compose.yml
[root@ubuntu1804 docker-compose]#cat docker-compose.yml
service-nginx-web:
image: 10.0.0.102/example/nginx-centos7-base:1.6.1
container_name: nginx-web
volumes:
- /data/nginx:/apps/nginx/html/#指定数据卷，将宿主机/data/nginx挂载到容器/apps/nginx/html
expose:
- 80
- 443
ports:
- "80:80"
- "443:443"
service-tomcat-app1:
image: 10.0.0.102/example/tomcat-web:app1
container_name: tomcat-app1
expose:
- 8080
ports:
- "8081:8080"
service-tomcat-app2:
image: 10.0.0.102/example/tomcat-web:app2
container_name: tomcat-app2
expose:
- 8080
ports:
- "8082:8080"
#在宿主机准备nginx测试页面文件
[root@ubuntu2204 docker-compose]#mkdir /data/nginx
[root@ubuntu2204 docker-compose]#echo Docker compose test page > /data/nginx/index.html
5.4.2 启动容器并验证结果
[root@ubuntu2204 docker-compose]#docker-compose up -d
Pulling service-tomcat-app1 (10.0.0.102/example/tomcat-web:app1)...
app1: Pulling from example/tomcat-web
f34b00c7da20: Already exists
544476d462f7: Already exists
39345915aa1b: Already exists
4b792f2bae38: Already exists
4439447a3522: Already exists
fe34d2ec1dd0: Already exists
b8487ca03126: Already exists
5a475b7d8b1a: Already exists
df8703d3d2dd: Already exists
f0da1ffa7aa7: Pull complete
80fd4c70e670: Pull complete
c2a0247d7bfa: Pull complete
b0977ed809cd: Pull complete
Digest: sha256:e0aba904df6095ea04c594d6906101f8e5f4a6ceb0a8f9b24432c47698d0caa8
Status: Downloaded newer image for 10.0.0.102/example/tomcat-web:app1
Pulling service-tomcat-app2 (10.0.0.102/example/tomcat-web:app2)...
app2: Pulling from example/tomcat-web
f34b00c7da20: Already exists
544476d462f7: Already exists
39345915aa1b: Already exists
4b792f2bae38: Already exists
4439447a3522: Already exists
fe34d2ec1dd0: Already exists
b8487ca03126: Already exists
5a475b7d8b1a: Already exists
df8703d3d2dd: Already exists
f0da1ffa7aa7: Already exists
80fd4c70e670: Already exists
1a55cb76a801: Pull complete
565ab795f82a: Pull complete
Digest: sha256:c4d6f166c3933f6c1ba59c84ea0518ed653af25f28b87981c242b0deff4209bb
Status: Downloaded newer image for 10.0.0.102/example/tomcat-web:app2
Creating tomcat-app1 ... done
Creating tomcat-app2 ... done
Creating nginx-web ... done
[root@ubuntu2204 docker-compose]#docker-compose ps
Name Command State Ports
-----------------------------------------------------------------------------------------
nginx-web /apps/nginx/sbin/nginx Up 0.0.0.0:443->443/tcp, 0.0.0.0:80->80/tcp
tomcat-app1 /apps/tomcat/bin/run_tomcat.sh Up 8009/tcp, 0.0.0.0:8081->8080/tcp
tomcat-app2 /apps/tomcat/bin/run_tomcat.sh Up 8009/tcp, 0.0.0.0:8082->8080/tcp
[root@ubuntu2204 docker-compose]#curl http://127.0.0.1/
Docker compose test page
[root@ubuntu2204 docker-compose]#curl http://127.0.0.1:8081/app/
Tomcat Page in app1
[root@ubuntu2204 docker-compose]#curl http://127.0.0.1:8082/app/
Tomcat Page in app2
5.4.3 指定同时启动容器的数量
[root@ubuntu2204 docker-compose]#vim docker-compose.yml
[root@ubuntu2204 docker-compose]#cat docker-compose.yml
service-nginx-web:
image: 10.0.0.102/example/nginx-centos7-base:1.6.1
# container_name: nginx-web #同时启动多个同一镜像的容器，不要指定容器名称，否则会冲突
expose:
- 80
- 443
# ports: #同时启动多个同一镜像的容器，不要指定端口号，否则会冲突
# - "80:80"
# - "443:443"
#再加一个service
service-tomcat:
image: 10.0.0.102/example/tomcat-base:v8.5.50
[root@ubuntu2204 docker-compose]#docker-compose ps
Name Command State Ports
------------------------------
[root@ubuntu2204 docker-compose]#docker-compose up -d --scale service-nginxweb=2
Creating docker-compose_service-tomcat_1 ... done
Creating docker-compose_service-nginx-web_1 ... done
Creating docker-compose_service-nginx-web_2 ... done
[root@ubuntu2204 docker-compose]#docker-compose ps
Name Command State Ports
---------------------------------------------------------------------------------
-----
docker-compose_service-nginx-web_1 /apps/nginx/sbin/nginx Up 443/tcp, 80/tcp
docker-compose_service-nginx-web_2 /apps/nginx/sbin/nginx Up 443/tcp, 80/tcp
docker-compose_service-tomcat_1 /bin/bash Exit 0
[root@ubuntu2204 docker-compose]#docker-compose up -d --scale service-nginxweb=3 --scale service-tomcat=2
Starting docker-compose_service-tomcat_1 ... done
Starting docker-compose_service-nginx-web_1 ... done
Starting docker-compose_service-nginx-web_2 ... done
Creating docker-compose_service-nginx-web_3 ... done
Creating docker-compose_service-tomcat_2 ... done
[root@ubuntu2204 docker-compose]#docker-compose ps
Name Command State Ports
--------------------------------------------------------------------------------------
docker-compose_service-nginx-web_1 /apps/nginx/sbin/nginx Up 443/tcp, 80/tcp
docker-compose_service-nginx-web_2 /apps/nginx/sbin/nginx Up 443/tcp, 80/tcp
docker-compose_service-nginx-web_3 /apps/nginx/sbin/nginx Up 443/tcp, 80/tcp
docker-compose_service-tomcat_1 /bin/bash Exit 0
docker-compose_service-tomcat_2 /bin/bash Exit 0
[root@ubuntu2204 docker-compose]#docker-compose up -d
Stopping and removing docker-compose_service-nginx-web_2 ... done
Stopping and removing docker-compose_service-nginx-web_3 ... done
Stopping and removing docker-compose_service-tomcat_2 ... done
Starting docker-compose_service-tomcat_1 ... done
Starting docker-compose_service-nginx-web_1 ... done
[root@ubuntu2204 docker-compose]#docker-compose ps
Name Command State Ports
--------------------------------------------------------------------------------------
docker-compose_service-nginx-web_1 /apps/nginx/sbin/nginx Up 443/tcp, 80/tcp
docker-compose_service-tomcat_1 /bin/bash Exit 0
5.4.4 扩容和缩容
注意: 新版中scale 命令已废弃
#扩容
[root@ubuntu2204 docker-compose]#docker-compose scale service-nginx-web=3
#缩容为0，即删除容器
[root@ubuntu2204 docker-compose]#docker-compose scale service-nginx-web=0
5.5 实战案例: 实现 Wordpress 应用
version: '3'
services:
db:
image: mysql:5.7.30
container_name: db
restart: unless-stopped
environment:
- MYSQL_DATABASE=wordpress
- MYSQL_ROOT_PASSWORD=123456
- MYSQL_USER=wordpress
- MYSQL_PASSWORD=123456
volumes:
- dbdata:/var/lib/mysql
networks:
- wordpress-network
wordpress:
depends_on:
- db
image: wordpress:5.8.0-php8.0-apache
container_name: wordpress
restart: unless-stopped
ports:
- "80:80"
environment:
- WORDPRESS_DB_HOST=db:3306
- WORDPRESS_DB_USER=wordpress
- WORDPRESS_DB_PASSWORD=123456
- WORDPRESS_DB_NAME=wordpress
volumes:
- wordpress:/var/www/html
networks:
- wordpress-network
volumes:
wordpress:
dbdata:
networks:
wordpress-network:
driver: bridge
ipam:
config:
- subnet: 172.30.0.0/16
5.6 实战案例: 搭建运维平台 Spug
Spug是面向中小型企业设计的轻量级无Agent的自动化运维平台，整合了主机管理、主机批量执行、主机在线终端、文件在线上传下载、应用发布部署、在线任务计划、配置中心、监控、报警等一系列功能。
Spug是上海时巴克科技有限公司旗下的开源运维项目，公司旗下现有产品「Spug开源运维平台」「Spug推送助手」，公司专注为中小企业服务。
参考链接
https://spug.cc/docs/install-docker
范例: 基于docker-compse 部署 Spug
#安装docker和docker-compse
略
#创建docker-compse.yml文件
#vi docker-compose.yml
version: "3.9"
services:
db:
image: mariadb:10.8
container_name: spug-db
restart: always
command: --character-set-server=utf8mb4 --collationserver=utf8mb4_unicode_ci
volumes:
- /data/spug/mysql:/var/lib/mysql
environment:
- MYSQL_DATABASE=spug
- MYSQL_USER=spug
- MYSQL_PASSWORD=spug.cc
- MYSQL_ROOT_PASSWORD=spug.cc
spug:
image: openspug/spug-service
container_name: spug
privileged: true
restart: always
volumes:
- /data/spug/service:/data/spug
- /data/spug/repos:/data/repos
ports:
# 如果80端口被占用可替换为其他端口，例如: - "8000:80"
- "80:80"
environment:
- SPUG_DOCKER_VERSION=v3.2.1
- MYSQL_DATABASE=spug
- MYSQL_USER=spug
- MYSQL_PASSWORD=spug.cc
- MYSQL_HOST=db
- MYSQL_PORT=3306
depends_on:
- db
#启动项目
#docker compose up -d
#初始化:以下操作会创建一个用户名为 admin 密码为 spug.dev 的管理员账户，可自行替换管理员账户/密码。
docker exec spug init_spug admin spug.dev
#访问测试:在浏览器中输入 http://localhost:80 访问（默认账户密码在上面一步初始化时设置）。
5.7 案例: 一键生成 Docker Compose
利用网站将docker 命令自动生成 Docker Compse
https://www.composerize.com/
阅读建议
评论
匿名评论
隐私政策
你无需删除空行，直接评论以获取最佳展示效果