containers/podman v2.1.0 on GitHub

Features

A new command, podman image mount, has been added. This allows for an image to be mounted, read-only, to inspect its contents without creating a container from it (#1433).
The podman save and podman load commands can now create and load archives containing multiple images (#2669).
Rootless Podman now supports all podman network commands, and rootless containers can now be joined to networks.
The performance of podman build on ADD and COPY instructions has been greatly improved, especially when a .dockerignore is present.
The podman run and podman create commands now support a new mode for the --cgroups option, --cgroups=split. Podman will create two cgroups under the cgroup it was launched in, one for the container and one for Conmon. This mode is useful for running Podman in a systemd unit, as it ensures that all processes are retained in systemd's cgroup hierarchy (#6400).
The podman run and podman create commands can now specify options to slirp4netns by using the --network option as follows: --net slirp4netns:opt1,opt2. This allows for, among other things, switching the port forwarder used by slirp4netns away from rootlessport.
The podman ps command now features a new option, --storage, to show containers from Buildah, CRI-O and other applications.
The podman run and podman create commands now feature a --sdnotify option to control the behavior of systemd's sdnotify with containers, enabling improved support for Podman in Type=notify units.
The podman run command now features a --preserve-fds opton to pass file descriptors from the host into the container (#6458).
The podman run and podman create commands can now create overlay volume mounts, by adding the :O option to a bind mount (e.g. -v /test:/test:O). Overlay volume mounts will mount a directory into a container from the host and allow changes to it, but not write those changes back to the directory on the host.
The podman play kube command now supports the Socket HostPath type (#7112).
The podman play kube command now supports read-only mounts.
The podman play kube command now supports setting labels on pods from Kubernetes metadata labels.
The podman play kube command now supports setting container restart policy (#7656).
The podman play kube command now properly handles HostAlias entries.
The podman generate kube command now adds entries to /etc/hosts from --host-add generated YAML as HostAlias entries.
The podman play kube and podman generate kube commands now properly support shareProcessNamespace to share the PID namespace in pods.
The podman volume ls command now supports the dangling filter to identify volumes that are dangling (not attached to any container).
The podman run and podman create commands now feature a --umask option to set the umask of the created container.
The podman create and podman run commands now feature a --tz option to set the timezone within the container (#5128).
Environment variables for Podman can now be added in the containers.conf configuration file.
The --mount option of podman run and podman create now supports a new mount type, type=devpts, to add a devpts mount to the container. This is useful for containers that want to mount /dev/ from the host into the container, but still create a terminal.
The --security-opt flag to podman run and podman create now supports a new option, proc-opts, to specify options for the container's /proc filesystem.
Podman with the crun OCI runtime now supports a new option to podman run and podman create, --cgroup-conf, which allows for advanced configuration of cgroups on cgroups v2 systems.
The podman create and podman run commands now support a --override-variant option, to override the architecture variant of the image that will be pulled and ran.
A new global option has been added to Podman, --runtime-flags, which allows for setting flags to use when the OCI runtime is called.
The podman manifest add command now supports the --cert-dir, --auth-file, --creds, and --tls-verify options.

Security

This release resolves CVE-2020-14370, in which environment variables could be leaked between containers created using the Varlink API.

Changes

Podman will now retry pulling an image 3 times if a pull fails due to network errors.
The podman exec command would previously print error messages (e.g. exec session exited with non-zero exit code -1) when the command run exited with a non-0 exit code. It no longer does this. The podman exec command will still exit with the same exit code as the command run in the container did.
Error messages when creating a container or pod with a name that is already in use have been improved.
For read-only containers running systemd init, Podman creates a tmpfs filesystem at /run. This was previously limited to 65k in size and mounted noexec, but is now unlimited size and mounted exec.
The podman system reset command no longer removes configuration files for rootless Podman.

Bugfixes

Fixed a bug where Podman would not add an entry to /etc/hosts for a container if it joined another container's network namespace (#66782).
Fixed a bug where podman save --format oci-dir saved the image in an incorrect format (#6544).
Fixed a bug where privileged containers would still configure an AppArmor profile.
Fixed a bug where the --format option of podman system df was not properly interpreting format codes that included backslashes (#7149).
Fixed a bug where rootless Podman would ignore errors from newuidmap and newgidmap, even if /etc/subuid and /etc/subgid contained valid mappings for the user running Podman.
Fixed a bug where the podman commit command did not properly handle single-character image names (#7114).
Fixed a bug where the output of podman ps --format=json did not include a Status field (#6980).
Fixed a bug where input to the --log-level option was no longer case-insensitive.
Fixed a bug where podman images could segfault when an image pull was aborted while incomplete, leaving an image without a manifest (#7444).
Fixed a bug where rootless Podman would try to create the ~/.config directory when it did not exist, despite not placing any configuration files inside the directory.
Fixed a bug where the output of podman system df was inconsistent based on whether the -v option was specified (#7405).
Fixed a bug where --security-opt apparmor=unconfined would error if Apparmor was not enabled on the system (#7545).
Fixed a bug where running podman stop on multiple containers starting with --rm could sometimes cause no such container errors (#7384).
Fixed a bug where podman-remote would still try to contact the server when displaying help information about subcommands.
Fixed a bug where the podman build --logfile command would segfault.
Fixed a bug where the podman generate systemd command did not properly handle containers which were created with a name given as --name=$NAME instead of --name $NAME (#7157).
Fixed a bug where the podman ps was ignoring the --latest flag.
Fixed a bug where the podman-remote kill command would hang when a signal that did not kill the container was specified (#7135).
Fixed a bug where the --oom-score-adj option of podman run and podman create was nonfunctional.
Fixed a bug where the --display option of podman runlabel was nonfunctional.
Fixed a bug where the podman runlabel command would not pull images that did not exist locally on the system.
Fixed a bug where podman-remote run would not exit with the correct code with the container was removed by a podman-remote rm -f while podman-remote run was still running (#7117).
Fixed a bug where the podman-remote run --rm command would error attempting to remove containers that had already been removed (e.g. by podman-remote rm --force) (#7340).
Fixed a bug where podman --user with a numeric user and podman run --userns=keepid could create users in /etc/passwd in the container that belong to groups without a corresponding entry in /etc/group (#7389).
Fixed a bug where podman run --userns=keepid could create entries in /etc/passwd with a UID that was already in use by another user (#7503).
Fixed a bug where podman --user with a numeric user and podman run --userns=keepid could create users that could not be logged into (#7499).
Fixed a bug where trying to join another container's user namespace with --userns container:$ID would fail (#7547).
Fixed a bug where the podman play kube command would trim underscores from container names (#7020).
Fixed a bug where the podman attach command would not show output when attaching to a container with a terminal (#6523).
Fixed a bug where the podman system df command could be extremely slow when large quantities of images were present (#7406).
Fixed a bug where podman images -a would break if any image pulled by digest was present in the store (#7651).
Fixed a bug where the --mount option to podman run and podman create required the type= parameter to be passed first (#7628).
Fixed a bug where the --infra-command parameter to podman pod create was nonfunctional.
Fixed a bug where podman auto-update would fail for any container started with --pull=always (#7407).
Fixed a bug where the podman wait command would only accept a single argument.
Fixed a bug where the parsing of the --volumes-from option to podman run and podman create was broken, making it impossible to use multiple mount options at the same time (#7701).
Fixed a bug where the podman exec command would not join executed processes to the container's supplemental groups if the container was started with both the --user and --group-add options.
Fixed a bug where the --iidfile option to podman-remote build was nonfunctional.

API

The Libpod API version has been bumped to v2.0.0 due to a breaking change in the Image List API.
Docker-compatible Volume Endpoints (Create, Inspect, List, Remove, Prune) are now available!
Added an endpoint for generating systemd unit files for containers.
The last parameter to the Libpod container list endpoint now has an alias, limit (#6413).
The Libpod image list API new returns timestamps in Unix format, as integer, as opposed to as strings
The Compat Inspect endpoint for containers now includes port information in NetworkSettings.
The Compat List endpoint for images now features limited support for the (deprecated) filter query parameter (#6797).
Fixed a bug where the Compat Create endpoint for containers was not correctly handling bind mounts.
Fixed a bug where the Compat Create endpoint for containers would not return a 404 when the requested image was not present.
Fixed a bug where the Compat Create endpoint for containers did not properly handle Entrypoint and Command from images.
Fixed a bug where name history information was not properly added in the Libpod Image List endpoint.
Fixed a bug where the Libpod image search endpoint improperly populated the Description field of responses.
Added a noTrunc option to the Libpod image search endpoint.
Fixed a bug where the Pod List API would return null, instead of an empty array, when no pods were present (#7392).
Fixed a bug where endpoints that hijacked would do perform the hijack too early, before being ready to send and receive data (#7195).
Fixed a bug where Pod endpoints that can operate on multiple containers at once (e.g. Kill, Pause, Unpause, Stop) would not forward errors from individual containers that failed.
The Compat List endpoint for networks now supports filtering results (#7462).
Fixed a bug where the Top endpoint for pods would return both a 500 and 404 when run on a non-existant pod.
Fixed a bug where Pull endpoints did not stream progress back to the client.
The Version endpoints (Libpod and Compat) now provide version in a format compatible with Docker.
All non-hijacking responses to API requests should not include headers with the version of the server.
Fixed a bug where Libpod and Compat Events endpoints did not send response headers until the first event occurred (#7263).
Fixed a bug where the Build endpoints (Compat and Libpod) did not stream progress to the client.
Fixed a bug where the Stats endpoints (Compat and Libpod) did not properly handle clients disconnecting.
Fixed a bug where the Ignore parameter to the Libpod Stop endpoint was not performing properly.
Fixed a bug where the Compat Logs endpoint for containers did not stream its output in the correct format (#7196).

Misc

Updated Buildah to v1.16.1
Updated the containers/storage library to v1.23.5
Updated the containers/image library to v5.6.0
Updated the containers/common library to v0.22.0