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Fly To Podman: a script that will help you to migrate from Docker

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Re: Fly To Podman: a script that will help you to migrate from Docker

#61

Post by passivegains »

pinoy420 wrote: post #42

Why do people consistently like to make their lives harder in software engineering?

programmers ("developers," if you prefer) have trouble with "second order" thinking. we integrate X technology in Y way, maybe with some Z optimization, and that'll solve the problem.

okay, but, like... will it?

is there new maintenance stuff you've completely ignored? (I've noticed this is more common when maintenance is someone else's job.) is it completely new and none of us know about it so we get blindsided unless everything goes exactly right every time? do we get visibility into what it's doing? can we fix it when (not if, when) it breaks? can everyone work on it or is it impossible for anyone but the person who set it up? they're good at thinking up things that should fix the problem but less good at things that will.

I'm a fan of cross-functional feature teams because others in the software engineering ecosystem like QA, systems people, ops, etc. tend not to have this problem. programmers are accountable to the other stakeholders up front, bad ideas are handled in real time, and- this is the most important part- everyone learns. (I won't say all systems people are cantankerous bastards... but the mistakes they've harangued me for are usually the mistakes I don't make twice.)

Re: Fly To Podman: a script that will help you to migrate from Docker

#63

Post by wink »

exceptione wrote: post #43
wink wrote: post #39

Earlier quoted context omitted.

The point is that it works 95% of the time, or probably more like 98%. If this is a e.g. webserver and I only need my fastcgi backend built by myself, I can still have reverse proxy, database, and every other package be done by the distro. No one said you need backports. More like: If it fits 90% and one package doesn't work, you get it from somewhere else - that doesn't invalidate the concept of a distro for me. YMM…

Honest question: wouldn't that make you more nervous you now arrived at an unknown/unsupported configuration? Boring stability is the goal, but if Debian does not fit as is, then why not find a total package that is somewhat more cutting edge but does fit together? Especially given the fact that Debian does customization to upstream, so esoteric times esoteric.

It doesn't make me nervous because Debian has only let me down a couple of times over nearly 20 years and for example Ubuntu und RHEL and SLES have let me down dozens of times each.

Also I don't usually run "supported". I just run a system that fits my needs.

Re: Fly To Podman: a script that will help you to migrate from Docker

#64

Post by johnbrodie »

jjice wrote: post #16

Has Podman become more user friendly in recent years? I gave it a go about three or four years ago now when Docker began their commercial push (which I don't have an issue with). This was for some hobby project, so I didn't spend a ton of time, but it definitely wasn't as set-and-forget as Docker was. I believe I had to set up a separate VM or something? This was on Linux as the host OS too. It's been a while, so apo…

Hasn't become more friendly from what I've seen. The project seems largely centered around K8s, and isn't really investing in fixing anything on the "compose" side. I did the same thing as you when Docker first started going down the more commercial path, and after dealing with random breakages for a number of years, fully switched back to Docker (for local dev work on osx).

Podman machine is fine, but occasionally you have to fix things _in the vm_ to get your setup working. Those bugs, along with other breakages during many upgrades, plus slower performance compared to Docker, made me switch back. This is just for local dev with a web app or two and some supporting services in their own containers via compose, nothing special. Totally not worth it IMO.

Re: Fly To Podman: a script that will help you to migrate from Docker

#66

Post by mikedelfino »

lbhdc wrote: post #26

Last year I transitioned all of my personal projects to use podman. The biggest surface area was converting CI to use podman to build my docker files, but also changed out tooling to use it (like having kind use it instead of docker). For the most part this worked without issue. The only snag I ran into was my CI provider can't use oci formatted images. Podman lets you select the format of image to build, so I was ab…

Are you pulling base images from Docker Hub, or do you build all images from source from scratch?

Re: Fly To Podman: a script that will help you to migrate from Docker

#67

Post by lbhdc »

mikedelfino wrote: post #66
lbhdc wrote: post #26

Last year I transitioned all of my personal projects to use podman. The biggest surface area was converting CI to use podman to build my docker files, but also changed out tooling to use it (like having kind use it instead of docker). For the most part this worked without issue. The only snag I ran into was my CI provider can't use oci formatted images. Podman lets you select the format of image to build, so I was ab…

Are you pulling base images from Docker Hub, or do you build all images from source from scratch?

I am pulling from a few registries, but trying to move everything to a private registry.

In podman, you have to use the "full path" to work with docker hub. Eg `docker.io/library/nginx`.

Re: Fly To Podman: a script that will help you to migrate from Docker

#68

Post by toprerules »

Just want to say everyone should be using podman. Its architecture is way more sane and integrates with Linux on a far more basic level (a regular process that can be started via systemd, etc. instead of a root daemon. Run it as root to get privileged containers).

They've also built an incredible ecosystem around podman itself. Red Hat has been absolutely cooking with containers recently.

Re: Fly To Podman: a script that will help you to migrate from Docker

#70

Post by mati365 »

toprerules wrote: post #68

Just want to say everyone should be using podman. Its architecture is way more sane and integrates with Linux on a far more basic level (a regular process that can be started via systemd, etc. instead of a root daemon. Run it as root to get privileged containers). They've also built an incredible ecosystem around podman itself. Red Hat has been absolutely cooking with containers recently.

Systemd .container services (Quadlet) are excellent. I used them to set up multiple smaller sites without any issues. Containers work just like regular systemd services. I created a small Ansible template to demonstrate how simple yet powerful this solution is.

GH: https://github.com/Mati365/hetzner-podman-bunjs-deploy

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