feat: support for pods

[No9]

podman pod create and podman play kube mem.yaml fails with

Error: building local pause image: finding pause binary: exec: "catatonit": executable file not found in $PATH

catatonit can be found here: https://github.com/openSUSE/catatonit An intial review shows there are a couple of linuxisms in there: prctl.h which may be changable for procctl.h in freebsd.
signalfd.h may need replacing with kqueue implementation.
Also reviewed the older initrs https://github.com/cyphar/initrs but it has the same dependencies on signalfd.

There may be other items once this issue is resolved but this is what I have discovered so far.

kube mem.yaml

apiVersion: v1
kind: Pod
metadata:
  name: memory-demo
  namespace: mem-example
spec:
  containers:
  - name: memory-demo-ctr
    image: polinux/stress
    resources:
      requests:
        memory: "100Mi"
      limits:
        memory: "200Mi"
    command: ["stress"]
    args: ["--vm", "1", "--vm-bytes", "150M", "--vm-hang", "1"]

[dfr]

You can install catatonit from ports:

$ sudo pkg install catatonit
Updating FreeBSD repository catalogue...
FreeBSD repository is up to date.
Updating FreeBSD-base repository catalogue...
FreeBSD-base repository is up to date.
Updating containers repository catalogue...
containers repository is up to date.
All repositories are up to date.
The following 1 package(s) will be affected (of 0 checked):

New packages to be INSTALLED:
	catatonit: 0.1.7_2 [containers]

Number of packages to be installed: 1

226 KiB to be downloaded.

Proceed with this action? [y/N]: y
[1/1] Fetching catatonit-0.1.7_2.pkg: 100%  226 KiB 231.3kB/s    00:01
Checking integrity... done (0 conflicting)
[1/1] Installing catatonit-0.1.7_2...
[1/1] Extracting catatonit-0.1.7_2: 100%
$ pkg info catatonit
catatonit-0.1.7_2
Name           : catatonit
Version        : 0.1.7_2
Installed on   : Tue Sep  3 14:35:40 2024 BST
Origin         : sysutils/catatonit
Architecture   : FreeBSD:14:amd64
Prefix         : /usr/local
Categories     : sysutils
Licenses       : GPLv3+
Maintainer     : [email protected]
WWW            : https://github.com/openSUSE/catatonit
Comment        : A signal-forwarding process manager for containers
Annotations    :
	FreeBSD_version: 1400097
	build_timestamp: 2024-08-20T17:09:36+0000
	built_by       : poudriere-git-3.4.99.20231211
	port_checkout_unclean: no
	port_git_hash  : f95273e649e4
	ports_top_checkout_unclean: no
	ports_top_git_hash: a44e54a52619
	repo_type      : binary
	repository     : containers
Flat size      : 655KiB
Description    :
A container init that is so simple it's effectively brain-dead. See
https://github.com/openSUSE/catatonit#readme for more details.

This is based on my port of catatonit which you can find at https://github.com/dfr/catatonit.

[dfr]

Possibly we should add catatonit as a dependency of either podman-suite or podman.

[No9]

Thanks @dfr I'd say it should be added alright as I totally missed you could get it from ports so someone else probably will

Keeping this open as I want to run the yaml tests and capture them here

[dfr]

I'll add this to the podman-suite port when I update the podman ports next. In the meantime, after manually installing catatonit, pods should work for you - I use them locally with podman and Kubernetes