v1.6.0-rc1

This is the first release candidate for v1.6.0. Preliminary release notes follow:

Features

• The podman network create, podman network rm, podman network inspect, and podman network ls commands have been added to manage CNI networks used by Podman
• The podman volume create command can now create and mount volumes with options, allowing volumes backed by NFS, tmpfs, and many other filesystems
• Podman can now run containers without CGroups for better integration with systemd by using the --cgroups=disabled flag with podman create and podman run. This is presently only supported with the crun OCI runtime
• The podman volume rm and podman volume inspect commands can now refer to volumes by an unambiguous partial name, in addition to full name (e.g. podman volume rm myvol to remove a volume named myvolume) (#3891)
• The podman run and podman create commands now support the --pull flag to allow forced re-pulling of images (#3734)
• Mounting volumes into a container using --volume, --mount, and --tmpfs now allows the suid, dev, and exec mount options (the inverse of nosuid, nodev, noexec) (#3819)
• The podman push command now supports the --digestfile option to save a file containing the pushed digest
• Pods can now have their hostname set via podman pod create --hostname or providing Pod YAML with a hostname set to podman play kube (#3732)
• The podman image sign command now supports the --cert-dir flag
• The podman run and podman create commands now support the --security-opt label=filetype:$LABEL flag to set the SELinux label for container files
• The remote Podman client now supports healthchecks

Bugfixes

• Fixed a bug where remote podman pull would panic if a Varlink connection was not available (#4013)
• Fixed a bug where podman exec would not properly set terminal size when creating a new exec session (#3903)
• Fixed a bug where podman exec would not clean up socket symlinks on the host (#3962)
• Fixed a bug where Podman could not run systemd in containers that created a CGroup namespace
• Fixed a bug where podman prune -a would attempt to prune images used by Buildah and CRI-O, causing errors (#3983)
• Fixed a bug where improper permissions on the ~/.config directory could cause rootless Podman to use an incorrect directory for storing some files
• Fixed a bug where the bash completions for podman import threw errors
• Fixed a bug where Podman volumes created with podman volume create would not copy the contents of their mountpoint the first time they were mounted into a container (#3945)
• Fixed a bug where rootless Podman could not run podman exec when the container was not run inside a CGroup owned by the user (#3937)
• Fixed a bug where podman play kube would panic when given Pod YAML without a securityContext (#3956)
• Fixed a bug where Podman would place files incorrectly when storage.conf configuration items were set to the empty string (#3952)
• Fixed a bug where podman build did not correctly inherit Podman's CGroup configuration, causing crashed on CGroups V2 systems (#3938)
• Fixed a bug where podman cp would improperly copy files on the host when copying a symlink in the container that included a glob operator (#3829)
• Fixed a bug where remote podman run --rm would exit before the container was completely removed, allowing race conditions when removing container resources (#3870)
• Fixed a bug where rootless Podman would not properly handle changes to /etc/subuid and /etc/subgid after a container was launched
• Fixed a bug where rootless Podman could not include some devices in a container using the --device flag (#3905)
• Fixed a bug where the commit Varlink API would segfault if provided incorrect arguments (#3897)
• Fixed a bug where temporary files were not properly cleaned up after a build using remote Podman (#3869)
• Fixed a bug where podman remote cp crashed instead of reporting it was not yet supported (#3861)
• Fixed a bug where podman exec would run as the wrong user when execing into a container was started from an image with Dockerfile USER (or a user specified via podman run --user) (#3838)
• Fixed a bug where images pulled using the oci: transport would be improperly named
• Fixed a bug where podman varlink would hang when managed by systemd due to SD_NOTIFY support conflicting with Varlink (#3572)

Misc

• Significant changes were made to Podman volumes in this release. If you have pre-existing volumes, it is strongly recommended to run podman system renumber after upgrading.
• Version 0.8.1 or greater of the CNI Plugins is now required for Podman
• Version 2.0.1 or greater of Conmon is strongly recommended
• Updated vendored Buildah to v1.11.2
• Improved error messages when trying to run podman pause or podman stats on a rootless container on a system without CGroups V2 enabled
• TMPDIR has been set to /var/tmp by default to better handle large temporary files
• podman wait has been optimized to detect stopped containers more rapidly
• Podman containers now include a ContainerManager annotation indicating they were created by libpod
• The podman info command now includes information about slirp4netns and fuse-overlayfs if they are available
• Podman no longer sets a default size of 65kb for tmpfs filesystems
• The default Podman CNI network has been renamed in an attempt to prevent conflicts with CRI-O when both are run on the same system. This should only take effect on system restart
• The output of podman volume inspect has been more closely matched to docker volume inspect