- kubeadm: Control plane images (etcd, kube-apiserver, kube-proxy, etc.) no longer use arch suffixes. Arch suffixes are kept for kube-dns only. ([#66960](https://github.com/kubernetes/kubernetes/pull/66960),
[@rosti](https://github.com/rosti)) Courtesy of SIG Cluster Lifecycle, SIG Release, and SIG Testing

   */
  @Deprecated
  JAVA_EXT_DIRS("java.ext.dirs"),

  /** Operating system name. */
  OS_NAME("os.name"),

  /** Operating system architecture. */
  OS_ARCH("os.arch"),

  /** Operating system version. */
  OS_VERSION("os.version"),

  /** File separator ("/" on UNIX). */
  FILE_SEPARATOR("file.separator"),

  /** Path separator (":" on UNIX). */

   */
  @Deprecated
  JAVA_EXT_DIRS("java.ext.dirs"),

  /** Operating system name. */
  OS_NAME("os.name"),

  /** Operating system architecture. */
  OS_ARCH("os.arch"),

  /** Operating system version. */
  OS_VERSION("os.version"),

  /** File separator ("/" on UNIX). */
  FILE_SEPARATOR("file.separator"),

  /** Path separator (":" on UNIX). */

  amd64 binary instead of the go-runner that matches that architecture.
  
  This commit explicitly sets the '--platform=linux/${arch}' to ensure
  we're pulling the correct go-runner arch from the manifest list.
  
  Before:
  `FROM ${base_image}`
  
  After:
  `FROM --platform=linux/${arch} ${base_image}` ([#94552](https://github.com/kubernetes/kubernetes/pull/94552), [@justaugustus](https://github.com/justaugustus)) [SIG Release]

     */
    public static final String OS_NAME = System.getProperty("os.name").toLowerCase(Locale.ENGLISH);

    /**
     * The OA architecture.
     */
    public static final String OS_ARCH = System.getProperty("os.arch").toLowerCase(Locale.ENGLISH);

    /**
     * The OS version.
     */
    public static final String OS_VERSION = System.getProperty("os.version").toLowerCase(Locale.ENGLISH);

    /**
     * OS Family
     */

    private void logGlobalBuildInfo() {
        final String osName = System.getProperty("os.name");
        final String osVersion = System.getProperty("os.version");
        final String osArch = System.getProperty("os.arch");
        final Jvm gradleJvm = Jvm.current();
        JvmInstallationMetadata gradleJvmMetadata = metadataDetector.getMetadata(gradleJvm.getJavaHome());

* AWS: Allow cross-region image pulling with ECR ([#24369](https://github.com/kubernetes/kubernetes/pull/24369), [@therc](https://github.com/therc))
* Automatically add node labels beta.kubernetes.io/{os,arch} ([#23684](https://github.com/kubernetes/kubernetes/pull/23684), [@luxas](https://github.com/luxas))

          int scale = theUnsafe.arrayIndexScale(byte[].class);

          // Use Unsafe only if we're in a 64-bit JVM with an 8-byte aligned field offset.
          if (Objects.equals(System.getProperty("sun.arch.data.model"), "64")
              && (offset % 8) == 0
              // sanity check - this should never fail
              && scale == 1) {
            return offset;
          }

            <li>Property check: {@code ${my.property} != 'some-value'}</li>
            <li>Regex matching: {@code matches(${os.version}, '.*aws')}</li>
            <li>Complex condition: {@code ${os.name} == 'windows' && ${os.arch} != 'amd64' && inrange(${os.version}, '[10,)')}</li>
            <li>String length check: {@code length(${user.name}) > 5}</li>
            <li>Substring with version: {@code substring(${java.version}, 0, 3) == '1.8'}</li>

- The deprecated mondo `kubernetes-test` tarball is no longer built. Users running Kubernetes e2e tests should use the `kubernetes-test-portable` and `kubernetes-test-{OS}-{ARCH}` tarballs instead. ([#83093](https://github.com/kubernetes/kubernetes/pull/83093), [@ixdy](https://github.com/ixdy))

### Scheduling