Podman: Podman play kube ignores Limits

[daniel-wtd]

Is this a BUG REPORT or FEATURE REQUEST? (leave only one on its own line)

/kind bug

Description

It seems like some Attributes/Paramaters in a kubernetes deployment.yaml are ignored in podman. I was able to identify
the following behaviour.

Steps to reproduce the issue:

1. Create a file (deployment.yml) with the below content

apiVersion: v1
kind: Deployment
metadata:
  name: test
  labels:
    app: test
  namespace: test
spec:
  restartPolicy: Always
  selectors:
    matchLabels:
      app: test
  template:
    metadata:
      labels:
        app: test
    spec:
      containers:
        - name: web01
          image: docker.io/library/httpd:2.4
          imagePullPolicy: Always
          resources:
            requests:
              memory: "128Mi"
              cpu: "250m"
            limits:
              memory: "128Mi"
              cpu: "250m"
          ports:
            - name: http
              containerPort: 80

1. Run [sudo] podman play kube deployment.yml
2. First error is comming up, that the imagePullPolicy is not ok
3. Remove the line and repeat Step 2
4. Inspect the container and pod via podman (container|pod) (inspect|stats)

Describe the results you received:

For step 2, the deployment does not work at all.
In Step 5, you can see that the deployment still uses all of the available memory/cpu and the restartPolicy seems to be ignored.
Also the namespace declaration is not shown in podman pod ls --ns.

Describe the results you expected:

1. A list with supported parameters would be fine for now
2. Memory and CPU Limits should work from a deployment.yaml the same way like -m when using podman run

Additional information you deem important (e.g. issue happens only occasionally):

Output of podman version:

Version:      2.0.6
API Version:  1
Go Version:   go1.14.6
Built:        Tue Sep  1 21:26:51 2020
OS/Arch:      linux/amd64

Output of podman info --debug:

host:
  arch: amd64
  buildahVersion: 1.15.1
  cgroupVersion: v2
  conmon:
    package: conmon-2.0.19-1.fc32.x86_64
    path: /usr/bin/conmon
    version: 'conmon version 2.0.19, commit: 5dce9767526ed27f177a8fa3f281889ad509fea7'
  cpus: 8
  distribution:
    distribution: fedora
    version: "32"
  eventLogger: file
  hostname: nb01
  idMappings:
    gidmap:
    - container_id: 0
      host_id: 1000
      size: 1
    - container_id: 1
      host_id: 100000
      size: 65536
    uidmap:
    - container_id: 0
      host_id: 1000
      size: 1
    - container_id: 1
      host_id: 100000
      size: 65536
  kernel: 5.8.9-200.fc32.x86_64
  linkmode: dynamic
  memFree: 3985612800
  memTotal: 16600133632
  ociRuntime:
    name: crun
    package: crun-0.14.1-5.fc32.x86_64
    path: /usr/bin/crun
    version: |-
      crun version 0.14.1
      commit: 598ea5e192ca12d4f6378217d3ab1415efeddefa
      spec: 1.0.0
      +SYSTEMD +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +YAJL
  os: linux
  remoteSocket:
    path: /run/user/1000/podman/podman.sock
  rootless: true
  slirp4netns:
    executable: /usr/bin/slirp4netns
    package: slirp4netns-1.1.4-1.fc32.x86_64
    version: |-
      slirp4netns version 1.1.4
      commit: b66ffa8e262507e37fca689822d23430f3357fe8
      libslirp: 4.3.1
      SLIRP_CONFIG_VERSION_MAX: 2
  swapFree: 8371826688
  swapTotal: 8371826688
  uptime: 40h 52m 8.75s (Approximately 1.67 days)
registries:
  search:
  - registry.fedoraproject.org
  - registry.access.redhat.com
  - registry.centos.org
  - docker.io
store:
  configFile: /var/home/dschier/.config/containers/storage.conf
  containerStore:
    number: 2
    paused: 0
    running: 1
    stopped: 1
  graphDriverName: overlay
  graphOptions:
    overlay.mount_program:
      Executable: /usr/bin/fuse-overlayfs
      Package: fuse-overlayfs-1.1.2-1.fc32.x86_64
      Version: |-
        fusermount3 version: 3.9.1
        fuse-overlayfs: version 1.1.0
        FUSE library version 3.9.1
        using FUSE kernel interface version 7.31
  graphRoot: /var/home/dschier/.local/share/containers/storage
  graphStatus:
    Backing Filesystem: extfs
    Native Overlay Diff: "false"
    Supports d_type: "true"
    Using metacopy: "false"
  imageStore:
    number: 10
  runRoot: /run/user/1000
  volumePath: /var/home/dschier/.local/share/containers/storage/volumes
version:
  APIVersion: 1
  Built: 1598988411
  BuiltTime: Tue Sep  1 21:26:51 2020
  GitCommit: ""
  GoVersion: go1.14.6
  OsArch: linux/amd64
  Version: 2.0.6

Package info (e.g. output of rpm -q podman or apt list podman):

podman-2.0.6-1.fc32.x86_64

Have you tested with the latest version of Podman and have you checked the Podman Troubleshooting Guide?

Yes

Additional environment details (AWS, VirtualBox, physical, etc.):

Issue occurs on Fedora 32 Silverblue, Fedora 32 Server and Fedora CoreOS.

[rhatdan]

Interested in opening a PR to fix this?
@zhangguanzhang @ashley-cui @haircommander Anyone else interested in fixing this?

[zhangguanzhang]

I think I can fix this problem, but I am busy recently. If others are busy, I will fix this problem later.

[xordspar0]

First error is comming up, that the imagePullPolicy is not ok

This was fixed in cd2b2d9fae0c1dbcf8f4222ba461d5cc8223dd51 and released in podman 2.1.0.

[xordspar0]

Just to be clear, the imagePullPolicy: Always issue was fixed in that commit, but not the rest of it. Was another fix done recently that fixes the limits issue?

[mheon]

No, reopening.

[xordspar0]

Also the namespace declaration is not shown in podman pod ls --ns.

I think --ns shows you information about Linux namespaces (as in man 7 namespaces), which are different from Kubernetes namespaces. Does podman support Kubernetes namespaces? If not, what would be required to add them?

[mheon]

We have something similar (Libpod namespaces and the --namespace flag) but they are poorly documented and, honestly, I doubt anyone uses them. They're a little on the limited side right now.

[daniel-wtd]

It wouldnt be required. For me it would be totally fine to have some kind of documentation which parameters/arguments/flags are supported if one uses podman play kube (pod.yml|deployment.yml) :)

[xordspar0]

I'm working on adding support for limits to play kube in xordspar0:play-kube-limits-#7742.

[rhatdan]

@xordspar0 Any progress?

[xordspar0]

I guess I forgot to link to the PR I opened: https://github.com/containers/podman/pull/7853

I'm still working on it. I'm currently stuck with some test failures. I haven't figured out why it's happening yet.

[rhatdan]

Awesome.

[xordspar0]

https://github.com/containers/podman/pull/7853 was merged, so that should wrap this issue up I think.

[TomSweeneyRedHat]

As the reporter gave a thumbs up, I'm closing this issue. @xordspar0 TYVM for the PR to fix this!