by: Babin LonstonPosted on:

Podman cheat Sheet

A handy Podman cheat sheet, documenting for self reference.

Basic Podman Options

To check the current installed version of podman.

$ podman version $ podman --version # Only to print the podman version.
[root@node1 ~]# podman version Client: Podman Engine Version: 4.0.2 API Version: 4.0.2 Go Version: go1.18.4 Built: Tue Nov 8 22:30:52 2022 OS/Arch: linux/amd64 [root@node1 ~]#

Print everything about podman in this server.

$ podman info
$ podman system info
[root@node1 ~]# podman info host: arch: amd64 buildahVersion: 1.24.4 cgroupControllers: - cpuset - cpu - cpuacct

The long output has been truncated.

If we need to know podman disk usage

$ podman system df
[root@node1 ~]# podman system df TYPE TOTAL ACTIVE SIZE RECLAIMABLE Images 0 0 0B 0B (0%) Containers 0 0 0B 0B (0%) Local Volumes 0 0 0B 0B (0%) [root@node1 ~]#

Searching for a Image

Looking for a container image using name.

$ podman image search httpd
[root@node1 ~]# podman image search httpd NAME DESCRIPTION registry.access.redhat.com/rhscl/httpd-24-rhel7 Apache HTTP 2.4 Server registry.access.redhat.com/ubi8/httpd-24 Platform for running Apache httpd 2.4 or building httpd-based application

Searching for container image with tags

$ podman image search nginx --list-tags
[root@node1 ~]# podman image search nginx --list-tags NAME TAG docker.io/library/nginx 1 docker.io/library/nginx 1-alpine docker.io/library/nginx 1-alpine-perl docker.io/library/nginx 1-perl docker.io/library/nginx 1.10 docker.io/library/nginx 1.10-alpine docker.io/library/nginx 1.10.0 docker.io/library/nginx 1.10.0-alpine

Print only official images and limit to 3 numbers of output.

$ podman image search --filter=is-official --limit 3 nginx
[root@node1 ~]# podman image search --filter=is-official --limit 3 nginx NAME DESCRIPTION docker.io/library/nginx Official build of Nginx. [root@node1 ~]#

Pulling container Images

To download the container image user pull options by following arguments.

$ podman pull registry.access.redhat.com/ubi9/httpd-24

All tagged images in the repository will be pulled, usually we don’t do this in production.

$ podman pull httpd --all-tags

All other available options

--all-tags --arch ARCH --authfile string --cert-dir Pathname --creds Credentials --disable-content-trust --os OS --platform string --quiet --tls-verify --variant string

Listing Container Images

To list all the downloaded container images in local server use

$ podman image list $ podman image ls $ podman images # List images in local storage

Check if an image exists in local storage

$ podman image exists registry.access.redhat.com/ubi9/httpd-24 $ podman image exists httpd-24

Check history of the container image

$ podman image history httpd-24

To Inspect an Image

$ podman image inspect httpd-24

Print an image layers in tree structure 

[root@node1 ~]# podman image tree httpd-24 Image ID: 4afe283d911a Tags: [registry.access.redhat.com/ubi9/httpd-24:latest] Size: 378.8MB Image Layers ├── ID: 51dc345f72f6 Size: 219.4MB ├── ID: 54e043edb782 Size: 55.63MB └── ID: ff2f095c117d Size: 103.8MB Top Layer of: [registry.access.redhat.com/ubi9/httpd-24:latest] [root@node1 ~]#

Will add more on the fly.