12.7. 使用 Podman 自动运行容器和 pod

1. 存在一个名称与 YAML 文件中所用镜像相同的目录
2. 该目录包含一个 Containerfile

流程

1. 使用 wordpress.yaml 文件创建 wordpress pod：

   $ podman play kube wordpress.yaml
   STEP 1/2: FROM docker.io/library/mariadb
   STEP 2/2: COPY my.cnf /etc/mysql/my.cnf
   COMMIT localhost/mariadb-conf:latest
   --> 428832c45d0
   Successfully tagged localhost/mariadb-conf:latest
   428832c45d07d78bb9cb34e0296a7dc205026c2fe4d636c54912c3d6bab7f399
   Trying to pull docker.io/library/wordpress:latest...
   Getting image source signatures
   Copying blob 99c3c1c4d556 done
   ...
   Storing signatures
   Pod:
   3e391d091d190756e655219a34de55583eed3ef59470aadd214c1fc48cae92ac
   Containers:
   6c59ebe968467d7fdb961c74a175c88cb5257fed7fb3d375c002899ea855ae1f
   29717878452ff56299531f79832723d3a620a403f4a996090ea987233df0bc3d

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   podman play kube 命令：

   • 根据 docker.io/library/mariadb 镜像，自动构建 localhost/mariadb-conf:latest 镜像。
   • 拉取 docker.io/library/wordpress:latest 镜像。
   • 创建名为 wordpresspod 的 pod，它有两个容器，名为 wordpresspod-mydb 和 wordpresspod-myweb。

2. 列出所有容器和 pod：

   $ podman ps --pod -a
   CONTAINER ID  IMAGE                               COMMAND               CREATED        STATUS                    PORTS                 NAMES               POD ID        PODNAME
   a1dbf7b5606c  k8s.gcr.io/pause:3.5                                      3 minutes ago  Up 2 minutes ago          0.0.0.0:8080->80/tcp  3e391d091d19-infra  3e391d091d19  wordpresspod
   6c59ebe96846  localhost/mariadb-conf:latest       mariadbd              2 minutes ago  Exited (1) 2 minutes ago  0.0.0.0:8080->80/tcp  wordpresspod-mydb   3e391d091d19  wordpresspod
   29717878452f  docker.io/library/wordpress:latest  apache2-foregroun...  2 minutes ago  Up 2 minutes ago          0.0.0.0:8080->80/tcp  wordpresspod-myweb  3e391d091d19  wordpresspod

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