使用podman-compose快速部署应用

我们对于docker-compose并不陌生，它是一个用于编排多个可能相互依赖的容器的工具。

而Podman Compose项目的目标是作为 docker-ompose 的替代品，而不需要对 docker-compose.yaml 文件进行任何修改。

要想使用podman-compose需要先安装podman，然后安装podman-compose。

Rocky8下安装podman：

yum install -y podman

Rocky8下安装podman-compose，因为podman-compose是基于python开发，可以使用pip来安装:

pip3 install podman-compose

 

示例：使用podman-compose部署wordpress

编辑docker-compose.yml文件，内容如下

version: "3.8"
services:
web:
image: wordpress
restart: always
volumes:
- wordpress:/var/www/html
ports:
- 8080:80
environment:
WORDPRESS_DB_HOST: db
WORDPRESS_DB_USER: magazine
WORDPRESS_DB_NAME: magazine
WORDPRESS_DB_PASSWORD: 1maGazine!
WORDPRESS_TABLE_PREFIX: cz
WORDPRESS_DEBUG: 0
depends_on:
- db
networks:
- wpnet
db:
image: mariadb:10.5
restart: always
ports:
- 6603:3306

volumes:
- wpdbvol:/var/lib/mysql

environment:
MYSQL_DATABASE: magazine
MYSQL_USER: magazine
MYSQL_PASSWORD: 1maGazine!
MYSQL_ROOT_PASSWORD: 1maGazine!
networks:
- wpnet
volumes:
wordpress: {}
wpdbvol: {}

networks:
wpnet: {}

为了让podman拉取镜像更快，先给它配置个加速器

# mv /etc/containers/registries.conf /etc/containers/registries.conf.bak
# vi /etc/containers/registries.conf ##添加如下内容
unqualified-search-registries = ["docker.io"]

[[registry]]
prefix = "docker.io"
location = "docker.io"

[[registry.mirror]]
location = "hub-mirror.c.163.com"

[[registry.mirror]]
location = "mirror.baidubce.com"

[[registry.mirror]]
location = "f1361db2.m.daocloud.io"

[[registry.mirror]]
location = "ustc-edu-cn.mirror.aliyuncs.com"

[[registry.mirror]]
location = "ghcr.io"

然后就可以启动wordpress容器啦：

# podman-compose up -d

用起来其实跟docker-compose一样。