在Ubuntu系统上安装Podman的方法

本文介绍在Ubuntu操作系统上安装Podman（Pod Manager）的方法。它是一个用于创建和维护容器的工具，podman包位于PPA存储库中，需要在安装之前添加，适用Ubuntu 18.04等版本，可参考安装以使用Podman可以在非root权限中运行Linux容器一文。

 

在Ubuntu上安装Podman

在Ubuntu计算机上启动一个新的终端会话并运行下面的命令：

sudo apt update

sudo apt -y  install software-properties-common

sudo add-apt-repository -y ppa:projectatomic/ppa

添加存储库后，继续安装Podman：

sudo apt -y install podman

安装后，你可以显示有关主机、当前存储统计信息和podman构建的信息：

# podman  info

host:

BuildahVersion: 1.7-dev

Conmon:

package: 'cri-o-1.12: /usr/lib/crio/bin/conmon'

path: /usr/lib/crio/bin/conmon

version: 'conmon version 1.12.4-dev, commit: '

Distribution:

distribution: ubuntu

version: "18.04"

MemFree: 720404480

MemTotal: 1033080832

OCIRuntime:

package: 'cri-o-runc: /usr/sbin/runc'

path: /usr/sbin/runc

version: 'runc version spec: 1.0.1-dev'

SwapFree: 2047864832

SwapTotal: 2047864832

arch: amd64

cpus: 2

hostname: ubuntu-01

kernel: 4.15.0-42-generic

os: Linux

rootless: false

uptime: 2m 5.03s

insecure registries:

registries: []

registries:

registries:

- docker.io

- registry.fedoraproject.org

- quay.io

- registry.access.redhat.com

- registry.centos.org

store:

ConfigFile: /etc/containers/storage.conf

ContainerStore:

number: 1

GraphDriverName: overlay

GraphOptions: null

GraphRoot: /var/lib/containers/storage

GraphStatus:

Backing Filesystem: extfs

Native Overlay Diff: "true"

Supports d_type: "true"

Using metacopy: "false"

ImageStore:

number: 2

RunRoot: /var/run/containers/storage

注：以上操作在Ubuntu 18.04版本中测试成功。

 

在Ubuntu上测试使用Podman

Pull Alpine docker image：

$ podman pull alpine

Trying to pull docker.io/library/alpine…Getting image source signatures

Copying blob 8e402f1a9c57: 2.63 MiB / 2.63 MiB [=======================] 5s

Copying config 5cb3aa00f899: 1.48 KiB / 1.48 KiB [=====================] 0s

Writing manifest to image destination

Storing signatures

5cb3aa00f89934411ffba5c063a9bc98ace875

列出已下载的images，运行podman  images命令：

Podman的本地存储库位于/var/lib/containers中。

使用命令运行容器，命令选项类似于docker：

$ podman  run -it  --rm docker.io/library/alpine /bin/sh

/ # apk update

fetch http://dl-cdn.alpineLinux.org/alpine/v3.9/main/x86_64/APKINDEX.tar.gz

fetch http://dl-cdn.alpineLinux.org/alpine/v3.9/community/x86_64/APKINDEX.tar.gz

v3.9.2-1-g592d872fb8 [http://dl-cdn.alpineLinux.org/alpine/v3.9/main]

v3.9.2-2-ge7dc3349a9 [http://dl-cdn.alpineLinux.org/alpine/v3.9/community]

OK: 9754 distinct packages available

/ # apk add vim

(1/5) Installing lua5.3-libs (5.3.5-r1)

(2/5) Installing ncurses-terminfo-base (6.1_p20190105-r0)

(3/5) Installing ncurses-terminfo (6.1_p20190105-r0)

(4/5) Installing ncurses-libs (6.1_p20190105-r0)

(5/5) Installing vim (8.1.0630-r0)

Executing busybox-1.29.3-r10.trigger

OK: 40 MiB in 19 packages

/ # exit

显示正在运行的容器，运行podman ls命令：

测试运行相当的好，Podman安装很成功。