podman-system-generator ignores RemainAfterExit from .build Quadlet

[ChristophHannappel]

Issue Description

I've created a .build quadlet file which runs perfectly at the user context. Since the service is supposed to be started by a systemd.timer I've set RemainAfterExit=no, but the podman-system-generator generates a systemd.service file where the Option RemainAfterExit ist set to yes.
Therefore the service never stops and can not be started again by a systemd.timer

Steps to reproduce the issue

Steps to reproduce the issue

1. Create a basic hetznerDNSUpdate.build file:

[Unit]
Description=Build Hetzner DNS Updater

[Service]
RemainAfterExit=no

[Build]
ImageTag=localhost/hetznerdnsupdate:latest
SetWorkingDirectory=/home/channappel/hetznerDocker
Pull=newer

2. Run /usr/lib/systemd/system-generators/podman-system-generator --user --dryrun

Describe the results you received

At the [Service] Section the Option is set to RemainAfterExit=yes

/usr/lib/systemd/system-generators/podman-system-generator --user --dryrun
quadlet-generator[13723]: Error occurred resolving path "/etc/containers/systemd/users": lstat /etc/containers/systemd/users: no such file or directory
quadlet-generator[13723]: Error occurred resolving path "/etc/containers/systemd/users/1000": lstat /etc/containers/systemd/users: no such file or directory
quadlet-generator[13723]: Loading source unit file /home/channappel/.config/containers/systemd/hetznerDNSUpdate.build
---hetznerDNSUpdate-build.service---
[Unit]
Wants=network-online.target
After=network-online.target
Description=Build Hetzner DNS Updater
RequiresMountsFor=%t/containers
SourcePath=/home/channappel/.config/containers/systemd/hetznerDNSUpdate.build

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/usr/bin/podman build --pull=newer --tag=localhost/hetznerdnsupdate:latest /home/channappel/hetznerDocker
SyslogIdentifier=%N

[X-Build]
ImageTag=localhost/hetznerdnsupdate:latest
SetWorkingDirectory=/home/channappel/hetznerDocker
Pull=newer

Describe the results you expected

At the [Service] Section the Option is set to RemainAfterExit=no as specified in the hetznerDNSUpdate.build File.

/usr/lib/systemd/system-generators/podman-system-generator --user --dryrun
quadlet-generator[13723]: Error occurred resolving path "/etc/containers/systemd/users": lstat /etc/containers/systemd/users: no such file or directory
quadlet-generator[13723]: Error occurred resolving path "/etc/containers/systemd/users/1000": lstat /etc/containers/systemd/users: no such file or directory
quadlet-generator[13723]: Loading source unit file /home/channappel/.config/containers/systemd/hetznerDNSUpdate.build
---hetznerDNSUpdate-build.service---
[Unit]
Wants=network-online.target
After=network-online.target
Description=Build Hetzner DNS Updater
RequiresMountsFor=%t/containers
SourcePath=/home/channappel/.config/containers/systemd/hetznerDNSUpdate.build

[Service]
Type=oneshot
RemainAfterExit=no
ExecStart=/usr/bin/podman build --pull=newer --tag=localhost/hetznerdnsupdate:latest /home/channappel/hetznerDocker
SyslogIdentifier=%N

[X-Build]
ImageTag=localhost/hetznerdnsupdate:latest
SetWorkingDirectory=/home/channappel/hetznerDocker
Pull=newer

podman info output

podman info
host:
  arch: amd64
  buildahVersion: 1.37.3
  cgroupControllers:
  - cpu
  - memory
  - pids
  cgroupManager: systemd
  cgroupVersion: v2
  conmon:
    package: conmon-2.1.12-2.fc40.x86_64
    path: /usr/bin/conmon
    version: 'conmon version 2.1.12, commit: '
  cpuUtilization:
    idlePercent: 95.64
    systemPercent: 0.6
    userPercent: 3.76
  cpus: 12
  databaseBackend: boltdb
  distribution:
    distribution: fedora
    variant: server
    version: "40"
  eventLogger: journald
  freeLocks: 2048
  hostname: caracal.flusk.com
  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: 6.11.3-200.fc40.x86_64
  linkmode: dynamic
  logDriver: journald
  memFree: 13954265088
  memTotal: 67304443904
  networkBackend: netavark
  networkBackendInfo:
    backend: netavark
    dns:
      package: aardvark-dns-1.12.2-2.fc40.x86_64
      path: /usr/libexec/podman/aardvark-dns
      version: aardvark-dns 1.12.2
    package: netavark-1.12.2-1.fc40.x86_64
    path: /usr/libexec/podman/netavark
    version: netavark 1.12.2
  ociRuntime:
    name: crun
    package: crun-1.17-1.fc40.x86_64
    path: /usr/bin/crun
    version: |-
      crun version 1.17
      commit: 000fa0d4eeed8938301f3bcf8206405315bc1017
      rundir: /run/user/1000/crun
      spec: 1.0.0
      +SYSTEMD +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +CRIU +LIBKRUN +WASM:wasmedge +YAJL
  os: linux
  pasta:
    executable: /usr/bin/pasta
    package: passt-0^20240906.g6b38f07-1.fc40.x86_64
    version: |
      pasta 0^20240906.g6b38f07-1.fc40.x86_64
      Copyright Red Hat
      GNU General Public License, version 2 or later
        <https://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
      This is free software: you are free to change and redistribute it.
      There is NO WARRANTY, to the extent permitted by law.
  remoteSocket:
    exists: true
    path: /run/user/1000/podman/podman.sock
  rootlessNetworkCmd: pasta
  security:
    apparmorEnabled: false
    capabilities: CAP_CHOWN,CAP_DAC_OVERRIDE,CAP_FOWNER,CAP_FSETID,CAP_KILL,CAP_NET_BIND_SERVICE,CAP_SETFCAP,CAP_SETGID,CAP_SETPCAP,CAP_SETUID,CAP_SYS_CHROOT
    rootless: true
    seccompEnabled: true
    seccompProfilePath: /usr/share/containers/seccomp.json
    selinuxEnabled: true
  serviceIsRemote: false
  slirp4netns:
    executable: /usr/bin/slirp4netns
    package: slirp4netns-1.2.2-2.fc40.x86_64
    version: |-
      slirp4netns version 1.2.2
      commit: 0ee2d87523e906518d34a6b423271e4826f71faf
      libslirp: 4.7.0
      SLIRP_CONFIG_VERSION_MAX: 4
      libseccomp: 2.5.5
  swapFree: 25430056960
  swapTotal: 25430056960
  uptime: 3h 58m 8.00s (Approximately 0.12 days)
  variant: ""
plugins:
  authorization: null
  log:
  - k8s-file
  - none
  - passthrough
  - journald
  network:
  - bridge
  - macvlan
  - ipvlan
  volume:
  - local
registries:
  search:
  - registry.fedoraproject.org
  - registry.access.redhat.com
  - docker.io
store:
  configFile: /home/channappel/.config/containers/storage.conf
  containerStore:
    number: 0
    paused: 0
    running: 0
    stopped: 0
  graphDriverName: overlay
  graphOptions: {}
  graphRoot: /home/channappel/.local/share/containers/storage
  graphRootAllocated: 536860426240
  graphRootUsed: 290320703488
  graphStatus:
    Backing Filesystem: xfs
    Native Overlay Diff: "false"
    Supports d_type: "true"
    Supports shifting: "true"
    Supports volatile: "true"
    Using metacopy: "false"
  imageCopyTmpDir: /var/tmp
  imageStore:
    number: 12
  runRoot: /run/user/1000/containers
  transientStore: false
  volumePath: /home/channappel/.local/share/containers/storage/volumes
version:
  APIVersion: 5.2.3
  Built: 1727136000
  BuiltTime: Tue Sep 24 02:00:00 2024
  GitCommit: ""
  GoVersion: go1.22.7
  Os: linux
  OsArch: linux/amd64
  Version: 5.2.3

Podman in a container

No

Privileged Or Rootless

Rootless

Upstream Latest Release

No

Additional environment details

Baremetal Fedora Server 40

Additional information

None

[rhatdan]

@ygalblum @alexlarsson @vrothberg Why are we setting RemainAfterExit in quadlet at all?

[ygalblum]

Quadlet sets RemainAfterExit for all single shot services. I think the reason was that the original ones (.volume and .network) were actually one-offs that created the podman object and noop afterwards. So, there was no point in running them again (yes, they still run again after reboot).
I agree that Quadlet should check if the key is set in the Quadlet file and not override it.

[rhatdan]

What should the default for build be though, shouldn't it attempt a rebuild on each restart?
(Also agree on not modifying if user sets the field.)

[rhatdan]

Is there a way to check if the user set this?

[ygalblum]

Is there a way to check if the user set this?

Yes. We do something similar for KillMode here:

podman/pkg/systemd/quadlet/quadlet.go

Line 574 in 1ca42f0

killMode, ok := service.Lookup(ServiceGroup, "KillMode")

What should the default for build be though, shouldn't it attempt a rebuild on each restart?

Not sure