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Dell EMC Metro node 7.1 CLI Guide

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cluster summary

Displays a summary of all clusters and the connectivity between them.

Contexts

All contexts.

In /clusters context, command is summary.

Syntax

cluster summary

Description

The following table shows the fields available in the cluster summary output.

Table 1. cluster summary field descriptions
Field Description
Clusters:
Name Name of the cluster.
Cluster ID For metro node Local, always 1. For metro node Metro, 1 or 2.
TLA The Top-level Assembly. The product TLA must uniquely identify the product instance. For metro node the TLA must uniquely identify the cluster (which is the rack and all physical components in it)
Connected Whether or not the CLI is connected to at least one director in the cluster (connected to the cluster).
  • true - CLI is connected to the cluster.
  • false - CLI is not connected to the cluster.
Expelled
  • true - The cluster is expelled from its island.
  • false - The cluster is not expelled from its island.
Operational Status
  • degraded - The cluster is not operating as configured and is not currently transitioning. Examples include: degraded redundancy level (a director is dead), all exports switched to write through because of hardware health problems, suspended virtual volumes, suspended exports, storage volumes not visible from all directors, meta-volume not yet processed.
  • isolated - The cluster is not communicating with any other clusters.
  • ok - The cluster is functioning normally.
  • transitioning - The cluster is reacting to external events and may not be operating as configured. I/O may be suspended during the transition period.
  • If no meta-volume has been configured, operational status is transitioning.
  • unknown - The metro node encountered a problem determining the operational status of the cluster. This may indicate a degraded state, since it usually means that at least one of the directors is not responding or is communicating abnormally.
Health State
  • critical failure - The cluster is not functioning and may have failed completely. This may indicate a complete loss of back-end connectivity.
  • degraded - The cluster is not functioning at an optimal level. This may indicate non-functioning remote virtual volumes, unhealthy devices or storage volumes, suspended devices, conflicting director count configuration values, out-of-date devices, and so forth.
  • ok - The cluster is functioning normally.
  • unknown - The metro node cannot determine the cluster's health state, or the state is invalid.
  • major failure - The cluster is failing and some functionality may be degraded or unavailable. This may indicate complete loss of back-end connectivity.
  • minor failure - The cluster is functioning, but some functionality may be degraded. This may indicate one or more unreachable storage volumes.
Islands:
Island ID ID of the island. For current release, always 1.
Clusters Names of clusters belonging to the island. For current release, always cluster-1 or cluster-2.

Examples

Display summary for healthy clusters: 

VPlexcli:/> cluster summary
Clusters:
  Name       Cluster ID  TLA             Connected  Expelled  Operational Status  Health State
  ---------  ----------  --------------  ---------  --------  ------------------  ------------
  cluster-1  1           43A5DL9         true       false     ok                  ok
  cluster-2  2           43A7DL9         true       false     ok                  ok


Islands:
  Island ID  Clusters
  ---------  --------------------
  1          cluster-1, cluster-2

Display cluster summary for metro node Metro configuration with a inter-cluster link outage: 

VPlexcli:/> cluster summary
Clusters:
  Name       Cluster ID  TLA             Connected  Expelled  Operational Status  Health State
  ---------  ----------  --------------  ---------  --------  ------------------  ------------
  cluster-1  1           43A5DL9         true       false     ok                  degraded
  cluster-2  2           43A7DL9         true       false     ok                  degraded


Islands:
  Island ID  Clusters
  ---------  ---------
  1          cluster-1
  2          cluster-2

Display cluster summary for metro node Metro configuration with a cluster expelled: 

VPlexcli:/> cluster summary
Clusters:
  Name       Cluster ID  TLA             Connected  Expelled  Operational Status  Health State
  ---------  ----------  --------------  ---------  --------  ------------------  ------------
  cluster-1  1           43A5DL9         true       true      isolated            degraded
  cluster-2  2           43A7DL9         true       true      isolated            degraded


Islands:
  Island ID  Clusters
  ---------  ---------
  1          cluster-1
  2          cluster-2

See also

  • cluster status

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