Podman 4.2.0

Features

• Podman now supports the Gitlab Runner (using the Docker executor), allowing its use in Gitlab CI/CD pipelines.
• A new command has been added, podman pod clone, to create a copy of an existing pod. It supports several options, including --start to start the new pod, --destroy to remove the original pod, and --name to change the name of the new pod (#12843).
• A new command has been added, podman volume reload, to sync changes in state between Podman's database and any configured volume plugins (#14207).
• A new command has been added, podman machine info, which displays information about the host and the versions of various machine components.
• Pods created by podman play kube can now be managed by systemd unit files. This can be done via a new systemd service, podman-kube@.service - e.g. systemctl --user start podman-play-kube@$(systemd-escape my.yaml).service will run the Kubernetes pod or deployment contained in my.yaml under systemd.
• The podman play kube command now honors the RunAsUser, RunAsGroup, and SupplementalGroups setting from the Kubernetes pod's security context.
• The podman play kube command now supports volumes with the BlockDevice and CharDevice types (#13951).
• The podman play kube command now features a new flag, --userns, to set the user namespace of created pods. Two values are allowed at present: host and auto (#7504).
• The podman play kube command now supports setting the type of created init containers via the io.podman.annotations.init.container.type annotation.
• Pods now have include an exit policy (configurable via the --exit-policy option to podman pod create), which determines what will happen to the pod's infra container when the entire pod stops. The default, continue, acts as Podman currently does, while a new option, stop, stops the infra container after the last container in the pod stops, and is used by default for pods from podman play kube (#13464).
• The podman pod create command now allows the pod's name to be specified as an argument, instead of using the --name option - for example, podman pod create mypod instead of the prior podman pod create --name mypod. Please note that the --name option is not deprecated and will continue to work.
• The podman pod create command's --share option now supports adding namespaces to the set by prefacing them with + (as opposed to specifying all namespaces that should be shared) (#13422).
• The podman pod create command has a new option, --shm-size, to specify the size of the /dev/shm mount that will be shared if the pod shares its UTS namespace (#14609).
• The podman pod create command has a new option, --uts, to configure the UTS namespace that will be shared by containers in the pod.
• The podman pod create command now supports setting pod-level resource limits via the --cpus, --cpuset-cpus, and --memory options. These will set a limit for all containers in the pod, while individual containers within the pod are allowed to set further limits. Look forward to more options for resource limits in our next release!
• The podman create and podman run commands now include the -c short option for the --cpu-shares option.
• The podman create and podman run commands can now create containers from a manifest list (and not an image) as long as the --platform option is specified (#14773).
• The podman build command now supports a new option, --cpp-flag, to specify options for the C preprocessor when using Containerfile.in files that require preprocessing.
• The podman build command now supports a new option, --build-context, allowing the user to specify an additional build context.
• The podman machine inspect command now prints the location of the VM's Podman API socket on the host (#14231).
• The podman machine init command on Windows now fetches an image with packages pre-installed (#14698).
• Unused, cached Podman machine VM images are now cleaned up automatically. Note that because Podman now caches in a different directory, this will not clean up old images pulled before this change (#14697).
• The default for the --image-volume option to podman run and podman create can now have its default set through the image_volume_mode setting in containers.conf (#14230).
• Overlay volumes now support two new options, workdir and upperdir, to allow multiple overlay volumes from different containers to reuse the same workdir or upperdir (#14427).
• The podman volume create command now supports two new options, copy and nocopy, to control whether contents from the overmounted folder in a container will be copied into the newly-created named volume (copy-up).
• Volumes created using a volume plugin can now specify a timeout for all operations that contact the volume plugin (replacing the standard 5 second timeout) via the --opt o=timeout= option to podman volume create (BZ 2080458).
• The podman volume ls command's --filter name= option now supports regular expression matching for volume names (#14583).
• When used with a podman machine VM, volumes now support specification of the 9p security model using the security_model option to podman create -v and podman run -v.
• The remote Podman client's podman push command now supports the --remove-signatures option (#14558).
• The remote Podman client now supports the podman image scp command.
• The podman image scp command now supports tagging the transferred image with a new name.
• The podman network ls command supports a new filter, --filter dangling=, to list networks not presently used by any containers (#14595).
• The --condition option to podman wait can now be specified multiple times to wait on any one of multiple conditions.
• The podman events command now includes the -f short option for the --filter option.
• The podman pull command now includes the -a short option for the --all-tags option.
• The podman stop command now includes a new flag, --filter, to filter which containers will be stopped (e.g. podman stop --all --filter label=COM.MY.APP).
• The Podman global option --url now has two aliases: -H and --host.
• The podman network create command now supports a new option with the default bridge driver, --opt isolate=, which isolates the network by blocking any traffic from it to any other network with the isolate option enabled. This option is enabled by default for networks created using the Docker-compatible API.
• Added the ability to create sigstore signatures in podman push and podman manifest push.
• Added an option to read image signing passphrase from a file.

Changes

• Paused containers can now be killed with the podman kill command.
• The podman system prune command now removes unused networks.
• The --userns=keep-id and --userns=nomap options to the podman run and podman create commands are no longer allowed (instead of simply being ignored) with root Podman.
• If the /run directory for a container is part of a volume, Podman will not create the /run/.containerenv file (#14577).
• The podman machine stop command on macOS now waits for the machine to be completely stopped to exit (#14148).
• All podman machine commands now only support being run as rootless, given that VMs only functioned when run rootless.
• The podman unpause --all command will now only attempt to unpause containers that are paused, not all containers.
• Init containers created with podman play kube now default to the once type (#14877).
• Pods created with no shared namespaces will no longer create an infra container unless one is explicitly requested (#15048).
• The podman create, podman run, and podman cp commands can now autocomplete paths in the image or container via the shell completion.
• The libpod/common package has been removed as it's not used anywhere.
• The --userns option to podman create and podman run is no longer accepted when an explicit UID or GID mapping is specified (#15233).

Bugfixes

• Fixed a bug where bind-mounting /dev into a container which used the --init flag would cause the container to fail to start (#14251).
• Fixed a bug where the podman image mount command would not pretty-print its output when multiple images were mounted.
• Fixed a bug where the podman volume import command would print an unrelated error when attempting to import into a nonexistent volume (#14411).
• Fixed a bug where the podman system reset command could race against other Podman commands (#9075).
• Fixed a bug where privileged containers were not able to restart if the layout of host devices changed (#13899).
• Fixed a bug where the podman cp command would overwrite directories with non-directories and vice versa. A new --overwrite flag to podman cp allows for retaining the old behavior if needed (#14420).
• Fixed a bug where the podman machine ssh command would not preserve the exit code from the command run via ssh (#14401).
• Fixed a bug where VMs created by podman machine would fail to start when created with more than 3072MB of RAM on Macs with M1 CPUs (#14303).
• Fixed a bug where the podman machine init command would fail when run from C:\Windows\System32 on Windows systems (#14416).
• Fixed a bug where the podman machine init --now did not respect proxy environment variables (#14640).
• Fixed a bug where the podman machine init command would fail if there is no $HOME/.ssh dir (#14572).
• Fixed a bug where the podman machine init command would add a connection even if creating the VM failed (#15154).
• Fixed a bug where interrupting the podman machine start command could render the VM unable to start.
• Fixed a bug where the podman machine list --format command would still print a heading.
• Fixed a bug where the podman machine list command did not properly set the Starting field (#14738).
• Fixed a bug where the podman machine start command could fail to start QEMU VMs when the machine name started with a number.
• Fixed a bug where Podman Machine VMs with proxy variables could not be started more than once (#14636 and #14837).
• Fixed a bug where containers created using the Podman API would, when the Podman API service was managed by systemd, be killed when the API service was stopped (BZ 2052697).
• Fixed a bug where the podman -h command did not show help output.
• Fixed a bug where the podman wait command (and the associated REST API endpoint) could return before a container had fully exited, breaking some tools like the Gitlab Runner.
• Fixed a bug where healthchecks generated exec events, instead of health_status events (#13493).
• Fixed a bug where the podman pod ps command could return an error when run at the same time as podman pod rm (#14736).
• Fixed a bug where the podman systemd df command incorrectly calculated reclaimable storage for volumes (#13516).
• Fixed a bug where an exported container checkpoint using a non-default OCI runtime could not be restored.
• Fixed a bug where Podman, when used with a recent runc version, could not remove paused containers.
• Fixed a bug where the remote Podman client's podman manifest rm command would remove images, not manifests (#14763).
• Fixed a bug where Podman did not correctly parse wildcards for device major number in the podman run and podman create commands' --device-cgroup-rule option.
• Fixed a bug where the podman play kube command on 32 bit systems where the total memory was calculated incorrectly (#14819).
• Fixed a bug where the podman generate kube command could set ports and hostname incorrectly in generated YAML (#13030).
• Fixed a bug where the podman system df --format "" command would not output the Size and Reclaimable fields (#14769).
• Fixed a bug where the remote Podman client's podman pull command would display duplicate progress output.
• Fixed a bug where the podman system service command could leak memory when a client unexpectedly closed a connection when reading events or logs (#14879).
• Fixed a bug where Podman containers could fail to run if the image did not contain an /etc/passwd file (#14966).
• Fixed a bug where the remote Podman client's podman push command did not display progress information (#14971).
• Fixed a bug where a lock ordering issue could cause podman pod rm to deadlock if it was run at the same time as a command that attempted to lock multiple containers at once (#14929).
• Fixed a bug where the podman rm --force command would exit with a non-0 code if the container in question did not exist (#14612).
• Fixed a bug where the podman container restore command would fail when attempting to restore a checkpoint for a container with the same name as an image (#15055).
• Fixed a bug where the podman manifest push --rm command could remove image, instead of manifest lists (#15033).
• Fixed a bug where the podman run --rm command could fail to remove the container if it failed to start (#15049).
• Fixed a bug where the podman generate systemd --new command would create incorrect unit files when the container was created with the --sdnotify parameter (#15052).
• Fixed a bug where the podman generate systemd --new command would fail when -h <hostname> was used to create the container (#15124).

API

• The Docker-compatible API now supports API version v1.41 (#14204).
• Fixed a bug where containers created via the Libpod API had an incorrect umask set (#15036).
• Fixed a bug where the remote parameter to the Libpod API's Build endpoint for Images was nonfunctional (#13831).
• Fixed a bug where the Libpod List endpoint for Containers did not return the application/json content type header when there were no containers present (#14647).
• Fixed a bug where the Compat Stats endpoint for Containers could return incorrect memory limits (#14676).
• Fixed a bug where the Compat List and Inspect endpoints for Containers could return incorrect strings for container status.
• Fixed a bug where the Compat Create endpoint for Containers did not properly handle disabling healthchecks (#14493).
• Fixed a bug where the Compat Create endpoint for Networks did not support the mtu, name, mode, and parent options (#14482).
• Fixed a bug where the Compat Create endpoint for Networks did not allow the creation of networks name bridge (#14983).
• Fixed a bug where the Compat Inspect endpoint for Networks did not properly set netmasks in the SecondaryIPAddresses and SecondaryIPv6Addresses fields (#14674).
• The Libpod Stats endpoint for Pods now supports streaming output via two new parameters, stream and delay (#14674).

Misc

• Podman will now check for nameservers in /run/NetworkManager/no-stub-resolv.conf if the /etc/resolv.conf file only contains a localhost server.
• The podman build command now supports caching with builds that specify --squash-all by allowing the --layers flag to be used at the same time.
• Podman Machine support for QEMU installations at non-default paths has been improved.
• The podman machine ssh command no longer prints spurious warnings every time it is run.
• When accessing the WSL prompt on Windows, the rootless user will be preferred.
• The podman info command now includes a field for information on supported authentication plugins for improved Docker compatibility. Authentication plugins are not presently supported by Podman, so this field is always empty.
• The podman system prune command now no longer prints the Deleted Images header if no images were pruned.
• The podman system service command now automatically creates and moves to a sub-cgroup when running in the root cgroup (#14573).
• Updated Buildah to v1.27.0
• Updated the containers/image library to v5.22.0
• Updated the containers/storage library to v1.42.0
• Updated the containers/common library to v0.49.1
• Podman will automatically create a sub-cgroup and move itself into it when it detects that it is running inside a container (#14884).
• Fixed an incorrect release note about regexp.
• A new MacOS installer (via pkginstaller) is now supported.

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