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CentOs7 podmanを利用してみる

CentOs7 podmanを利用してみる

RED HAT社のオープンソースのコンテナエンジンであるpodmanを利用してnginxコンテナを起動するまでの構築手順。

目次

Centos7バージョン

# cat /etc/centos-release
CentOS Linux release 7.7.1908 (Core)

インストール

インストールを実行する

## podmanをインストールする
yum install podman -y

## 確認
podman --version

<出力結果>
podman version 1.4.4

Podmanを利用

podmanからnginxのコンテナを起動してみる

## nginxを起動
podman run -d -p 8080:80 nginx

## 確認
curl http://localhost:8080/

＜出力結果＞
<!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>

基本的なコマンドは、dockerと同じようです

## ヘルプコマンド
podman --help

＜出力結果＞
manage pods and images

Usage:
  podman [flags]
  podman [command]

Available Commands:
  attach      Attach to a running container
  build       Build an image using instructions from Dockerfiles
  commit      Create new image based on the changed container
  container   Manage Containers
  cp          Copy files/folders between a container and the local filesystem
  create      Create but do not start a container
  diff        Inspect changes on container's file systems
  events      Show podman events
  exec        Run a process in a running container
  export      Export container's filesystem contents as a tar archive
  generate    Generated structured data
  healthcheck Manage Healthcheck
  help        Help about any command
  history     Show history of a specified image
  image       Manage images
  images      List images in local storage
  import      Import a tarball to create a filesystem image
  info        Display podman system information
  init        Initialize one or more containers
  inspect     Display the configuration of a container or image
  kill        Kill one or more running containers with a specific signal
  load        Load an image from container archive
  login       Login to a container registry
  logout      Logout of a container registry
  logs        Fetch the logs of a container
  mount       Mount a working container's root filesystem
  pause       Pause all the processes in one or more containers
  play        Play a pod
  pod         Manage pods
  port        List port mappings or a specific mapping for the container
  ps          List containers
  pull        Pull an image from a registry
  push        Push an image to a specified destination
  restart     Restart one or more containers
  rm          Remove one or more containers
  rmi         Removes one or more images from local storage
  run         Run a command in a new container
  save        Save image to an archive
  search      Search registry for image
  start       Start one or more containers
  stats       Display a live stream of container resource usage statistics
  stop        Stop one or more containers
  system      Manage podman
  tag         Add an additional name to a local image
  top         Display the running processes of a container
  umount      Unmounts working container's root filesystem
  unpause     Unpause the processes in one or more containers
  unshare     Run a command in a modified user namespace
  version     Display the Podman Version Information
  volume      Manage volumes
  wait        Block on one or more containers