Podman部署及应用
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什么是podman
Podman是一个开源项目，可在大多数Linux平台上使用并开源在GitHub上。Podman是一个无守护进程的容器引擎，用于在Linux系统上开发，管理和运行Open Container Initiative（OCI）容器和容器镜像。Podman提供了一个与Docker兼容的命令行前端，它可以简单地作为Docker cli，简单地说你可以直接添加别名：alias docker = podman来使用podman。
Podman控制下的容器可以由root用户运行，也可以由非特权用户运行。Podman管理整个容器的生态系统，其包括pod，容器，容器镜像，和使用libpod library的容器卷。Podman专注于帮助您维护和修改OCI容器镜像的所有命令和功能，例如拉取和标记。它允许您在生产环境中创建，运行和维护从这些映像创建的容器
部署podman
安装podman
[root@localhost ~]# dnf -y install podman
//配置podman镜像加速器
[root@localhost ~]# vim /etc/containers/registries.conf
unqualified-search-registries = ["docker.io"] //修改设置拉取镜像取docker官网拉取
[[registry]] //添加
prefix = "docker.io" //添加
location = "w673ojdv.mirror.aliyuncs.com" //配置加速器
[root@localhost ~]# systemctl enable --now podman
podman基础操作
查看版本
[root@localhost ~]# podman -v
podman version 3.3.1
[root@localhost ~]# podman version
Version: 3.3.1
API Version: 3.3.1
Go Version: go1.16.7
Built: Wed Nov 10 05:23:56 2021
OS/Arch: linux/amd64
[root@localhost ~]#
查看详细信息
[root@localhost ~]# podman info
host:
arch: amd64
buildahVersion: 1.22.3
cgroupManager: systemd
cgroupVersion: v1
conmon:
package: conmon-2.0.29-1.module_el8.5.0+890+6b136101.x86_64
path: /usr/bin/conmon
version: 'conmon version 2.0.29, commit: 84384406047fae626269133e1951c4b92eed7603'
cpus: 4
distribution:
distribution: '"centos"'
version: "8"
-----------------省略--------------------
imageStore:
number: 1
runRoot: /run/containers/storage
volumePath: /var/lib/containers/storage/volumes
version:
APIVersion: 3.3.1
Built: 1636493036
BuiltTime: Wed Nov 10 05:23:56 2021
GitCommit: ""
GoVersion: go1.16.7
OsArch: linux/amd64
Version: 3.3.1
搜索镜像
[root@localhost ~]# podman search httpd
INDEX NAME DESCRIPTION STARS OFFICIAL AUTOMATED
docker.io docker.io/library/httpd The Apache HTTP Server Project 4116 [OK]
docker.io docker.io/clearlinux/httpd httpd HyperText Transfer Protocol (HTTP) ser... 2
docker.io docker.io/centos/httpd-24-centos7 Platform for running Apache httpd 2.4 or bui... 44
docker.io docker.io/manageiq/httpd Container with httpd, built on CentOS for Ma... 1 [OK]
拉取镜像
[root@localhost ~]# podman pull httpd
Resolving "httpd" using unqualified-search registries (/etc/containers/registries.conf)
Trying to pull docker.io/library/httpd:latest...
Getting image source signatures
Copying blob dcc4698797c8 done
Copying blob 41c22baa66ec done
Copying blob d982c879c57e done
Copying blob a2abf6c4d29d done
Copying blob 67283bbdd4a0 done
Copying config dabbfbe0c5 done
Writing manifest to image destination
Storing signatures
dabbfbe0c57b6e5cd4bc089818d3f664acfad496dc741c9a501e72d15e803b34
列出镜像
[root@localhost ~]# podman images
REPOSITORY TAG IMAGE ID CREATED SIZE
docker.io/library/httpd latest dabbfbe0c57b 7 months ago 148 MB
[root@localhost ~]# podman image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
docker.io/library/httpd latest dabbfbe0c57b 7 months ago 148 MB
删除镜像
[root@localhost ~]# podman rmi httpd
Untagged: docker.io/library/httpd:latest
Deleted: dabbfbe0c57b6e5cd4bc089818d3f664acfad496dc741c9a501e72d15e803b34
[root@localhost ~]# p