qemu machine disappears after upgrade to 5.0.0

[nilleb]

Issue Description

Describe your issueUpgrading from podman 4.9.3 to 5.0.0 the qemu machine has just disappeared from podman's radar.
The files are still there, but a podman machine list does not list it.
I must have missed some warning during the install - but I can not find any source of documentation about the change altogether.

Steps to reproduce the issue

Steps to reproduce the issue

1. on macos, upgrade podman from 4.9.3 to 5.0.0 - having a qemu machine

Describe the results you received

The podman machine is gone - I have to re-initialize a machine

Describe the results you expected

The existing qemu machine is still listed. OR - during the upgrade I am proposed to entirely remove it (because it occupies ~60GiB)

podman info output

host:
  arch: arm64
  buildahVersion: 1.35.0
  cgroupControllers:
  - cpu
  - io
  - memory
  - pids
  cgroupManager: systemd
  cgroupVersion: v2
  conmon:
    package: conmon-2.1.10-1.fc39.aarch64
    path: /usr/bin/conmon
    version: 'conmon version 2.1.10, commit: '
  cpuUtilization:
    idlePercent: 98.81
    systemPercent: 0.65
    userPercent: 0.54
  cpus: 4
  databaseBackend: sqlite
  distribution:
    distribution: fedora
    variant: coreos
    version: "39"
  eventLogger: journald
  freeLocks: 2047
  hostname: localhost.localdomain
  idMappings:
    gidmap:
    - container_id: 0
      host_id: 1000
      size: 1
    - container_id: 1
      host_id: 100000
      size: 1000000
    uidmap:
    - container_id: 0
      host_id: 501
      size: 1
    - container_id: 1
      host_id: 100000
      size: 1000000
  kernel: 6.7.7-200.fc39.aarch64
  linkmode: dynamic
  logDriver: journald
  memFree: 1641418752
  memTotal: 2047995904
  networkBackend: netavark
  networkBackendInfo:
    backend: netavark
    dns:
      package: aardvark-dns-1.10.0-1.20240312103946045036.main.18.g8377c0a.fc39.aarch64
      path: /usr/libexec/podman/aardvark-dns
      version: aardvark-dns 1.11.0-dev
    package: netavark-1.10.1-1.20240319111419242122.main.46.gcc3f35d.fc39.aarch64
    path: /usr/libexec/podman/netavark
    version: netavark 1.11.0-dev
  ociRuntime:
    name: crun
    package: crun-1.14.4-1.20240302220834691516.main.10.g64ee22c.fc39.aarch64
    path: /usr/bin/crun
    version: |-
      crun version UNKNOWN
      commit: feb70bc2ab11944a6443e4f5d2eb96a22f186b80
      rundir: /run/user/501/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-0^20240220.g1e6f92b-1.fc39.aarch64
    version: |
      pasta 0^20240220.g1e6f92b-1.fc39.aarch64-pasta
      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/501/podman/podman.sock
  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: true
  slirp4netns:
    executable: /usr/bin/slirp4netns
    package: slirp4netns-1.2.2-1.fc39.aarch64
    version: |-
      slirp4netns version 1.2.2
      commit: 0ee2d87523e906518d34a6b423271e4826f71faf
      libslirp: 4.7.0
      SLIRP_CONFIG_VERSION_MAX: 4
      libseccomp: 2.5.3
  swapFree: 0
  swapTotal: 0
  uptime: 0h 2m 39.00s
  variant: v8
plugins:
  authorization: null
  log:
  - k8s-file
  - none
  - passthrough
  - journald
  network:
  - bridge
  - macvlan
  - ipvlan
  volume:
  - local
registries:
  search:
  - docker.io
store:
  configFile: /var/home/core/.config/containers/storage.conf
  containerStore:
    number: 1
    paused: 0
    running: 0
    stopped: 1
  graphDriverName: overlay
  graphOptions: {}
  graphRoot: /var/home/core/.local/share/containers/storage
  graphRootAllocated: 106769133568
  graphRootUsed: 5559578624
  graphStatus:
    Backing Filesystem: xfs
    Native Overlay Diff: "true"
    Supports d_type: "true"
    Supports shifting: "false"
    Supports volatile: "true"
    Using metacopy: "false"
  imageCopyTmpDir: /var/tmp
  imageStore:
    number: 30
  runRoot: /run/user/501/containers
  transientStore: false
  volumePath: /var/home/core/.local/share/containers/storage/volumes
version:
  APIVersion: 5.0.0-dev-8a643c243
  Built: 1710720000
  BuiltTime: Mon Mar 18 01:00:00 2024
  GitCommit: ""
  GoVersion: go1.21.8
  Os: linux
  OsArch: linux/arm64
  Version: 5.0.0-dev-8a643c243

Podman in a container

No

Privileged Or Rootless

Rootless

Upstream Latest Release

Yes

Additional environment details

Additional environment details

Additional information

Additional information like issue happens only occasionally or issue happens with a particular architecture or on a particular setting

[bc-lee]

Maintainers mentioned this in the v5.0.0 Release Note:

QEMU is no longer a supported VM provider for podman machine on Mac. Instead, the native Apple hypervisor is supported.

[nilleb]

@bc-lee would you also have a link to the documentation explaining how to reclaim the GiB occupied by the qemu VM, eventually migrating the volumes from that format to the new, please?

[baude]

https://blog.podman.io/2024/03/migration-of-podman-4-to-podman-5-machines/ might be helpful.

if i was in your position, i would do:

1. podman machine reset
2. rm -fr ~/.config/containers/podman/machine/
3. rm -fr~/.local/share/containers/podman/machine
4. podman system connection ls
5. identify any system connections associated with podman machine
6. podman system connection rm <connection_name>
7. Rm any unneeded SSH keys in ~/.ssh

that should get you very close

[Luap99]

Moving it to a discussion because this is expected