Docker Desktop Updates: Versions 4.2.0 - 4.3.0 - cgroupv2, Pause/Resume, and DNS Deprecation

- [Docker Hub Tool v0.4.4](https://github.com/docker/hub-tool/releases/tag/v0.4.4) - [Go 1.17.3](https://golang.org/doc/go1.17) ### Bug fixes and minor changes #### For all platforms - Added a self-diagnose warning if the host lacks Internet connectivity. - Fixed an issue which prevented users from saving files from a volume using the Save As option in the Volumes UI. Fixes [docker/for-win#12407](https://github.com/docker/for-win/issues/12407). - Docker Desktop now uses cgroupv2. If you need to run `systemd` in a container then: - Ensure your version of `systemd` supports cgroupv2. [It must be at least `systemd` 247](https://github.com/systemd/systemd/issues/19760#issuecomment-851565075). Consider upgrading any `centos:7` images to `centos:8`. - Containers running `systemd` need the following options: [`--privileged --cgroupns=host -v /sys/fs/cgroup:/sys/fs/cgroup:rw`](https://serverfault.com/questions/1053187/systemd-fails-to-run-in-a-docker-container-when-using-cgroupv2-cgroupns-priva). #### For Mac - Docker Desktop on Apple silicon no longer requires Rosetta 2, with the exception of [three optional command line tools](/manuals/desktop/troubleshoot-and-support/troubleshoot/known-issues.md). #### For Windows - Fixed an issue that caused Docker Desktop to fail during startup if the home directory path contains a character used in regular expressions. Fixes [docker/for-win#12374](https://github.com/docker/for-win/issues/12374). ### Known issue Docker Desktop Dashboard incorrectly displays the container memory usage as zero on Hyper-V based machines. You can use the [`docker stats`](/reference/cli/docker/container/stats.md) command on the command line as a workaround to view the actual memory usage. See [docker/for-mac#6076](https://github.com/docker/for-mac/issues/6076). ### Deprecation - The following internal DNS names are deprecated and will be removed from a future release: `docker-for-desktop`, `docker-desktop`, `docker.for.mac.host.internal`, `docker.for.mac.localhost`, `docker.for.mac.gateway.internal`. You must now use `host.docker.internal`, `vm.docker.internal`, and `gateway.docker.internal`. - Removed: Custom RBAC rules have been removed from Docker Desktop as it gives `cluster-admin` privileges to all Service Accounts. Fixes [docker/for-mac/#4774](https://github.com/docker/for-mac/issues/4774). ## 4.2.0 {{< release-date date="2021-11-09" >}} ### New **Pause/Resume**: You can now pause your Docker Desktop session when you are not actively using it and save CPU resources on your machine. - Ships [Docker Public Roadmap#226](https://github.com/docker/roadmap/issues/226) **Software Updates**: The option to turn off automatic check for updates is now available for users on all Docker subscriptions, including Docker Personal and Docker Pro. All update-related settings have been moved to the **Software Updates** section. - Ships [Docker Public Roadmap#228](https://github.com/docker/roadmap/issues/228) **Window management**: The Docker Desktop Dashboard window size and position persists when you close and reopen Docker Desktop. ### Upgrades - [Docker Engine v20.10.10](/manuals/engine/release-notes/20.10.md#201010) - [containerd v1.4.11](https://github.com/containerd/containerd/releases/tag/v1.4.11) - [runc v1.0.2](https://github.com/opencontainers/runc/releases/tag/v1.0.2) - [Go 1.17.2](https://golang.org/doc/go1.17) - [Compose v2.1.1](https://github.com/docker/compose/releases/tag/v2.1.1) - [docker-scan 0.9.0](https://github.com/docker/scan-cli-plugin/releases/tag/v0.9.0) ### Bug fixes and minor changes #### For all platforms - Improved: Self-diagnose now also checks for overlap between host IPs and `docker networks`. - Fixed the position of the indicator that displays the availability of an update on the Docker Desktop Dashboard. #### For Mac - Fixed an issue that caused Docker Desktop to stop responding upon clicking **Exit** on the fatal error dialog. - Fixed a rare startup failure affecting users having a `docker volume` bind-mounted on top of a directory from the host. If existing, this fix will also remove manually user added `DENY DELETE` ACL entries on the corresponding host directory.

This document details updates to Docker Desktop from versions 4.2.0 to 4.3.0. Version 4.3.0 includes upgrades to Docker Engine, containerd, Buildx, Compose, Kubernetes, Docker Hub Tool, and Go. Key changes involve the adoption of cgroupv2, requiring systemd 247 or later for systemd containers, and fixes for issues related to internet connectivity, saving files from volumes, and a Windows startup failure. It also highlights the deprecation of several internal DNS names. Version 4.2.0 introduces Pause/Resume functionality, software update settings, and window management improvements. Upgrades include Docker Engine, containerd, runc, Go, Compose, and docker-scan. Bug fixes address self-diagnose, update indicator position, and issues on Mac related to exit and volume bind-mounting. A known issue on Hyper-V machines causes incorrect memory usage display.