// List of sources to populate environment variables in the container.
  // The keys defined within a source must be a C_IDENTIFIER. All invalid keys
  // will be reported as an event when the container is starting. When a key exists in multiple
  // sources, the value associated with the last source will take precedence.
  // Values defined by an Env with a duplicate key will take precedence.
  // Cannot be updated.
  // +optional

Its type must be a <a href="#Type_definitions">defined</a> type <code>T</code> or a
pointer to a defined type <code>T</code>, possibly followed by a list of type parameter
names <code>[P1, P2, …]</code> enclosed in square brackets.
<code>T</code> is called the receiver <i>base type</i>. A receiver base type cannot be
a pointer or interface type and it must be defined in the same package as the method.

## Changelog since v1.17.13

## Changes by Kind

### Bug or Regression

- An issues preventing volume expand controller to annotate the PVC with `volume.kubernetes.io/storage-resizer` when the PVC StorageClass is already updated to the out-of-tree provisioner is now fixed. ([#94489](https://github.com/kubernetes/kubernetes/pull/94489), [@ialidzhikov](https://github.com/ialidzhikov)) [SIG API Machinery, Apps and Storage]

- Improved scheduler performance when no scoring plugins were defined.
   ([#122058](https://github.com/kubernetes/kubernetes/pull/122058), [@aleksandra-malinowska](https://github.com/aleksandra-malinowska))
- Improved scheduler performance when no scoring plugins were defined.

For detailed release notes on the three alpha features from SIG AWS, please refer to the following Changelogs:

    Potential impacts:

## Changelog since v1.18.10

## Changes by Kind

### Bug or Regression

- An issues preventing volume expand controller to annotate the PVC with `volume.kubernetes.io/storage-resizer` when the PVC StorageClass is already updated to the out-of-tree provisioner is now fixed. ([#94489](https://github.com/kubernetes/kubernetes/pull/94489), [@ialidzhikov](https://github.com/ialidzhikov)) [SIG API Machinery, Apps and Storage]

In-tree bug fixes and improvements included:
- Fix load balancer status without VIP.
- Fix filtering of server status.
- Fix resizing PVC of Cinder volume.
- Disable load balancer configuration if it is not defined in cloud config.
- Add support for node shutdown taint.

The external provider includes all of the above with the additional fixes and features:
- Fix bug to prevent allocation of existing floating IP.

For the 1.8 release, SIG Scalability focused on automating large cluster
scalability testing in a continuous integration (CI) environment. The SIG
defined a concrete process for scalability testing, created
documentation for the current scalability thresholds, and defined a new set of
Service Level Indicators (SLIs) and Service Level Objectives (SLOs) for the system.
Here's the release [scalability validation report].

- The go version defined in `.go-version` is now fetched when invoking test, build, and code generation targets if the current go version does not match it. Set $FORCE_HOST_GO=y while testing or building to skip this behavior, or set $GO_VERSION to override the selected go...