### ConfigMap
* Volumes and environment variables populated from ConfigMap and Secret objects can now tolerate the named source object or specific keys being missing, by adding `optional: true` to the volume or environment variable source specifications. ([#39981](https://github.com/kubernetes/kubernetes/pull/39981), [@fraenkel](https://github.com/fraenkel))

 | | <<<$\{java.home\}>>> |
*----+------+------+
| <<<*>>> | User properties | <<<$\{foo\}>>> |
*----+------+------+
| <<<env.*>>>\
<<<*>>> | environment variables | <<<$\{env.PATH\}>>> |
*----+------+------+
| <<<settings.*>>> | Local user settings (see {{{../maven-settings/settings.html}settings reference}}) | <<<$\{settings.localRepository\}>>> |
*----+------+------+

			t.Fatalf("FAIL: Temporary file not cleaned in %v: %v", tempCNIConfDir, f.Name())
		}
	}
	t.Logf("PASS: All temporary files removed from %v", tempCNIConfDir)
}

// doTest sets up necessary environment variables, runs the Docker installation
// container and verifies output file correctness.
func doTest(t *testing.T, chainedCNIPlugin bool, wd, preConfFile, resultFileName, delayedConfFile, expectedOutputFile,

podAnnotations: {} annotations: {} securityContext: enabled: false runAsUser: 1000 runAsGroup: 1000 fsGroup: 1000 nodeSelector: {} tolerations: [] affinity: {} ## Use this field to add environment variables relevant to MinIO server. These fields will be passed on to MinIO container(s) ## when Chart is deployed environment: ## Please refer for comprehensive list https://min.io/docs/minio/linux/reference/minio-server/minio-server.html ## MINIO_SUBNET_LICENSE: "License key obtained from https://subnet.min.io"...

podAnnotations: {} annotations: {} securityContext: enabled: false runAsUser: 1000 runAsGroup: 1000 fsGroup: 1000 nodeSelector: {} tolerations: [] affinity: {} ## Use this field to add environment variables relevant to MinIO server. These fields will be passed on to MinIO container(s) ## when Chart is deployed environment: ## Please refer for comprehensive list https://min.io/docs/minio/linux/reference/minio-server/minio-server.html ## MINIO_SUBNET_LICENSE: "License key obtained from https://subnet.min.io"...

podAnnotations: {} annotations: {} securityContext: enabled: false runAsUser: 1000 runAsGroup: 1000 fsGroup: 1000 nodeSelector: {} tolerations: [] affinity: {} ## Use this field to add environment variables relevant to MinIO server. These fields will be passed on to MinIO container(s) ## when Chart is deployed environment: ## Please refer for comprehensive list https://min.io/docs/minio/linux/reference/minio-server/minio-server.html ## MINIO_SUBNET_LICENSE: "License key obtained from https://subnet.min.io"...

podAnnotations: {} annotations: {} securityContext: enabled: false runAsUser: 1000 runAsGroup: 1000 fsGroup: 1000 nodeSelector: {} tolerations: [] affinity: {} ## Use this field to add environment variables relevant to MinIO server. These fields will be passed on to MinIO container(s) ## when Chart is deployed environment: ## Please refer for comprehensive list https://min.io/docs/minio/linux/reference/minio-server/minio-server.html ## MINIO_SUBNET_LICENSE: "License key obtained from https://subnet.min.io"...

podAnnotations: {} annotations: {} securityContext: enabled: false runAsUser: 1000 runAsGroup: 1000 fsGroup: 1000 nodeSelector: {} tolerations: [] affinity: {} ## Use this field to add environment variables relevant to MinIO server. These fields will be passed on to MinIO container(s) ## when Chart is deployed environment: ## Please refer for comprehensive list https://min.io/docs/minio/linux/reference/minio-server/minio-server.html ## MINIO_SUBNET_LICENSE: "License key obtained from https://subnet.min.io"...

fsGroup: 1000 resources: requests: memory: 128Mi nodeSelector: {} tolerations: [] affinity: {} # Command to run after the main command on exit exitCommand: "" ## Use this field to add environment variables relevant to MinIO server. These fields will be passed on to MinIO container(s) ## when Chart is deployed environment: ## Please refer for comprehensive list https://docs.min.io/minio/baremetal/reference/minio-server/minio-server.html ## MINIO_SUBNET_LICENSE: "License key obtained from https://subnet.min.io"...

<i>packages</i>, whose properties allow efficient management of
dependencies.
</p>

<p>
The syntax is compact and simple to parse, allowing for easy analysis
by automatic tools such as integrated development environments.
</p>

<h2 id="Notation">Notation</h2>
<p>
The syntax is specified using a
<a href="https://en.wikipedia.org/wiki/Wirth_syntax_notation">variant</a>
of Extended Backus-Naur Form (EBNF):
</p>