- Ephemeral containers have been added in alpha. These temporary containers can be added to running pods for purposes such as debugging, similar to how `kubectl exec` runs a process in an existing container. Also like `kubectl exec`, no resources are reserved for ephemeral containers and they are not restarted when they exit. Note that container namespace targeting is not yet implemented, so [process namespace sharing](https:/...

  * You can now set container requests, container limits, and node allocatable reservations for the new `ephemeral-storage` resource.

  * The `ephemeral-storage` resource includes all the disk space a container might consume with container overlay or scratch.

* [alpha] Mount namespace propagation

  * The `VolumeMount.Propagation` field for `VolumeMount` in pod containers is now available.

- github.com/containerd/cgroups: [0dbf7f0 → v1.0.1](https://github.com/containerd/cgroups/compare/0dbf7f0...v1.0.1)
- github.com/containerd/containerd: [v1.4.4 → v1.4.11](https://github.com/containerd/containerd/compare/v1.4.4...v1.4.11)
- github.com/containerd/continuity: [aaeac12 → v0.1.0](https://github.com/containerd/continuity/compare/aaeac12...v0.1.0)

- Added a mechanism for configurable container restarts: _container-level restart rules_. This was an alpha feature behind the `ContainerRestartRules` feature gate. ([#132642](https://github.com/kubernetes/kubernetes/pull/132642), [@yuanwang04](https://github.com/yuanwang04)) [SIG API Machinery, Apps, Node and Testing]
- Added a new `FileKeyRef` field to containers, allowing them to load variables from files by setting this field.
  

* Use...

Two alpha features were also added in this release.

The RuntimeClass alpha feature enables a node to surface multiple runtime options to support a variety of workload types.  Examples include native linux containers, and “sandboxed” containers that isolate the container from the host kernel.

- github.com/aws/aws-sdk-go: [v1.38.49 → v1.44.116](https://github.com/aws/aws-sdk-go/compare/v1.38.49...v1.44.116)
- github.com/container-storage-interface/spec: [v1.6.0 → v1.7.0](https://github.com/container-storage-interface/spec/compare/v1.6.0...v1.7.0)
- github.com/containerd/ttrpc: [v1.0.2 → v1.1.0](https://github.com/containerd/ttrpc/compare/v1.0.2...v1.1.0)

- Fixed a bug where init containers may fail to start due to a temporary container runtime failure. ([#127212](https://github.com/kubernetes/kubernetes/pull/127212), [@SergeyKanzhelev](https://github.com/SergeyKanzhelev)) [SIG Node]

- The kubelet now only collects cgroups metrics for the node, container runtime, kubelet, pods, and containers. ([#72787](https://github.com/kubernetes/kubernetes/pull/72787), [@dashpole](https://github.com/dashpole))

#### Storage

# See https://github.com/protocolbuffers/upb/blob/9effcbcb27f0a665f9f345030188c0b291e32482/upb/upb.c#L183.
common:rbe_linux_cpu --copt=-Wno-gnu-offsetof-extensions
# Python config is the same across all containers because the binary is the same
common:rbe_linux_cpu --python_path="/usr/bin/python3"
# These you may need to change for your own GCP project.