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How to put in Podman on Ubuntu


Jack Wallen walks you thru the method of putting in the container runtime Podman on Ubuntu Server 22.04.

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Image: fatmawati/Adobe Stock

As , Kubernetes has formally deprecated Docker assist, which implies anybody working with Kubernetes might need to alter runtime environments. One such surroundings is almost a drop-in substitute for Docker named Podman.

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Podman is put in on RHEL-based server distributions by default and is obtainable to put in from the usual Ubuntu repositories. However, there are a couple of additional steps to take when putting in Podman on Ubuntu.

Let me stroll you thru the method.

What you’ll want

The solely belongings you’ll have to make this work are a operating occasion of Ubuntu Server 22.04 (Jammy Jellyfish) and a person with sudo privileges. That’s it. Let’s make some container magic.

How to put in Podman

The very first thing you need to do is replace and improve your occasion of Ubuntu. Log into the server and problem the next two instructions:

sudo apt replace
sudo apt improve -y

When the improve completes, you’re able to go. However, if the Linux kernel is upgraded within the course of, you’ll have to first restart the server so the modifications take impact. Restart with:

sudo reboot

After the reboot completes, log again in and set up Podman with the command:

sudo apt set up podman -y

How so as to add the default registries

Out of the field on Ubuntu Server, Podman doesn’t embody any registries. That means you gained’t be capable to pull down any photos. We have to repair that. Open the registries file with the command:

sudo nano /and many others/containers/registries.conf

You’ll see numerous content material that’s all commented out. Scroll all the way down to the underside of that file and paste the next code:

[registries.search]
registries=["registry.access.redhat.com", "registry.fedoraproject.org", "docker.io"]

That will add the redhat, fedoraproject, and docker registries to Podman.

Save and shut the file.

To confirm the registries have been added, problem the command:

podman information

You ought to see the next listed within the output:

registries:

 search:
 - registry.entry.redhat.com
 - registry.fedoraproject.org
 - docker.io

There we go. We now have registries to tug from. Test it by knocking down the hello-world picture with:

podman pull hello-world

You ought to see the next within the output:

Trying to tug docker.io/library/hello-world:newest...
Getting picture supply signatures
Copying blob 2db29710123e carried out
Copying config feb5d9fea6 carried out
Writing manifest to picture vacation spot
Storing signatures
feb5d9fea6a5e9606aa995e879d862b825965ba48de054caab5ef356dc6b3412

The final line might be a random string of characters indicating the ID of the picture that was pulled.

You can hold pulling totally different photos to additional take a look at Podman. Once you’re carried out, checklist out the pictures with:

podman photos

You ought to see all the pictures you’ve pulled listed (Figure A).

Figure A

I've pulled down hello-world, nginx, and ubuntu images with Podman.
I’ve pulled down hello-world, nginx and ubuntu photos with Podman.

Congratulations, you now have Podman up and operating on Ubuntu Server 22.04. Enjoy that containerized energy at your fingertips.

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