/** Returns true if this string is not a host name and might be an IP address. */
fun String.canParseAsIpAddress(): Boolean = VERIFY_AS_IP_ADDRESS.matches(this)

/**
 * Returns true if the length is not valid for DNS (empty or greater than 253 characters), or if any
 * label is longer than 63 characters. Trailing dots are okay.
 */
internal fun String.containsInvalidLabelLengths(): Boolean {
  if (length !in 1..253) return true

        }

        // Query for cluster witness service via DNS
        try {
            String clusterName = getClusterName(serverAddress);
            if (clusterName != null) {
                return InetAddress.getByName(clusterName + "-witness");
            }
        } catch (Exception e) {
            log.debug("Failed to discover cluster witness via DNS", e);
        }

    return true // The caller's address can be carried by this connection.
  }

  /**
   * Returns true if this connection's route has the same address as any of [candidates]. This
   * requires us to have a DNS address for both hosts, which only happens after route planning. We
   * can't coalesce connections that use a proxy, since proxies don't tell us the origin server's IP
   * address.
   */

                    }
                    final UniAddress[] addrs = wrapInetAddresses(InetAddress.getAllByName(hostname));
                    if (log.isDebugEnabled()) {
                        log.debug("Resolved '{}' to {} using DNS", hostname, Arrays.toString(addrs));
                    }
                    return addrs; // Success
                default:
                    throw new UnknownHostException(hostname);
                }

* Update kube-dns to Version 1.14.10. Major changes: ([#62676](https://github.com/kubernetes/kubernetes/pull/62676), [@MrHohn](https://github.com/MrHohn))
    * - Fix a bug in DNS resolution for externalName services and PTR records that need to query from upstream nameserver.



# v1.8.11

- Bind dns-horizontal containers to linux nodes to avoid Windows scheduling on kubernetes cluster includes linux nodes and windows nodes ([#83364](https://github.com/kubernetes/kubernetes/pull/83364), [@wawa0210](https://github.com/wawa0210)) [SIG Cluster Lifecycle and Windows]

- This PR sets the --cluster-dns flag value to kube-dns service IP whether or not NodeLocal DNSCache is enabled. NodeLocal DNSCache will listen on both the link-local as well as the service IP. ([#84383](https://github.com/kubernetes/kubernetes/pull/84383), [@prameshj](https://github.com/prameshj))
- kube-dns add-on:
  - All containers are now being executed under more restrictive privileges.

## Changelog since v1.15.9

## Changes by Kind

### Other (Bug, Cleanup or Flake)

- Fix the bug PIP's DNS is deleted if no DNS label service annotation isn't set. ([#87310](https://github.com/kubernetes/kubernetes/pull/87310), [@nilo19](https://github.com/nilo19)) [SIG Cloud Provider]

     */
    boolean isDisablePlainTextPasswords();

    /**
     *
     *
     * Property {@code jcifs.resolveOrder} (string, default {@code LMHOSTS,DNS,WINS,BCAST})
     *
     * @return order and selection of resolver modules, see {@link ResolverType}
     */
    List<ResolverType> getResolveOrder();

    /**
     *

      .isEqualTo(generalNameIpAddress to localhost)
    assertThat(CertificateAdapters.generalName.toDer(generalNameIpAddress to localhost))
      .isEqualTo(bytes)
  }

  @Test fun `choice dns`() {
    val bytes = "820b6578616d706c652e636f6d".decodeHex()
    assertThat(CertificateAdapters.generalName.fromDer(bytes))
      .isEqualTo(generalNameDnsName to "example.com")