descriptor's requiredConnectivity field.

  * If <<<(offline == true) && (requiresOnline != true)>>>, bind
    the mojo to the lifecycle.

    In this case, the client is <<offline>>, and the mojo does not require
    online status.

  * If <<<(offline == false) && (requiresOnline == true)>>>, bind
    the mojo to the lifecycle.

    In this case, the client is <<online>>, and the mojo either requires

	// If not set the client will not keep track of health.
	// Calling this returns true or false if the target
	// is online or offline.
	HealthCheckFn func() bool

	// HealthCheckRetryUnit will be used to calculate the exponential
	// backoff when trying to reconnect to an offline node
	HealthCheckReconnectUnit time.Duration

	// HealthCheckTimeout determines timeout for each call.
	HealthCheckTimeout time.Duration

					var lastOnline time.Time
					var offline time.Duration
					//	var deploymentID string
					sys.hMutex.RLock()
					prev, ok := sys.hc[result.Endpoint.Host]
					sys.hMutex.RUnlock()
					if ok {
						if prev.Online != result.Online || !result.Online {
							if !prev.lastHCAt.IsZero() {
								offline = time.Since(prev.lastHCAt) + prev.offlineDuration
							} else {

                boolean remoteEnabled = remote != null && remote.isEnabled();

                if (remoteEnabled && remoteAccessMode == RemoteAccessMode.OFFLINE) {
                    remoteEnabled = false;
                    LOGGER.warn("Remote build cache is disabled when running with --offline.");
                }

                DescribedBuildCacheService<DirectoryBuildCache, L> localDescribedService = localEnabled

| `minio_node_replication_link_online`                    | Reports whether the replication link is online (1) or offline (0).                                       |
| `minio_node_replication_link_offline_duration_seconds`  | Total duration of replication link being offline in seconds since last offline event                     |

		prometheus.NewDesc(
			prometheus.BuildFQName(minioNamespace, "nodes", "online"),
			"Total number of MinIO nodes online",
			nil, nil),
		prometheus.GaugeValue,
		float64(nodesUp),
	)
	ch <- prometheus.MustNewConstMetric(
		prometheus.NewDesc(
			prometheus.BuildFQName(minioNamespace, "nodes", "offline"),
			"Total number of MinIO nodes offline",
			nil, nil),
		prometheus.GaugeValue,
		float64(nodesDown),
	)

        return projectRequired;
    }

    // ----------------------------------------------------------------------
    // Online vs. Offline requirement
    // ----------------------------------------------------------------------

    /**
     * @param requiresOnline <code>true</code> if the Mojo is online, <code>false</code> otherwise.
     */
    public void setOnlineRequired(boolean requiresOnline) {

	// Return error when quorum unformatted disks - indicating we are
	// waiting for first server to be online.
	unformattedDisks := quorumUnformattedDisks(sErrs)
	if unformattedDisks && !firstDisk {
		return nil, errNotFirstDisk
	}

	// Return error when quorum unformatted disks but waiting for rest
	// of the servers to be online.
	if unformattedDisks && firstDisk {
		return nil, errFirstDiskWait
	}

| `minio_cluster_health_drives_online_count`         | `gauge` | Count of online drives in the cluster          |        |
| `minio_cluster_health_drives_count`                | `gauge` | Count of all drives in the cluster             |        |
| `minio_cluster_health_nodes_offline_count`         | `gauge` | Count of offline nodes in the cluster          |        |

        when:
        server.resetExpectations()
        then:
        executer.withArgument("--offline")
        run 'retrieve'
        and:
        file('libs/projectA-1.0-SNAPSHOT.jar').assertIsCopyOf(module.artifact.file)
    }

    @ToBeFixedForConfigurationCache
    def "can run offline mode after connection problem with repo url using unique snapshot version"() {
        given: