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Chapter 9. Viewing Elasticsearch status

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You can view the status of the Elasticsearch Operator and for a number of Elasticsearch components.

9.1. Viewing Elasticsearch status

You can view the status of your Elasticsearch cluster.

Prerequisites

  • Cluster logging and Elasticsearch must be installed.

Procedure

  1. Change to the openshift-logging project. 

    $ oc project openshift-logging

  2. To view the Elasticsearch cluster status:

    1. Get the name of the Elasticsearch instance: 

      $ oc get Elasticsearch

NAME            AGE
elasticsearch   5h9m

    2. Get the Elasticsearch status: 

      $ oc get Elasticsearch <Elasticsearch-instance> -o yaml

      For example: 

      $ oc get Elasticsearch elasticsearch -n openshift-logging -o yaml

      The output includes information similar to the following: 

      status: 1
  cluster: 2
    activePrimaryShards: 30
    activeShards: 60
    initializingShards: 0
    numDataNodes: 3
    numNodes: 3
    pendingTasks: 0
    relocatingShards: 0
    status: green
    unassignedShards: 0
  clusterHealth: ""
  conditions: [] 3
  nodes: 4
  - deploymentName: elasticsearch-cdm-zjf34ved-1
    upgradeStatus: {}
  - deploymentName: elasticsearch-cdm-zjf34ved-2
    upgradeStatus: {}
  - deploymentName: elasticsearch-cdm-zjf34ved-3
    upgradeStatus: {}
  pods: 5
    client:
      failed: []
      notReady: []
      ready:
      - elasticsearch-cdm-zjf34ved-1-6d7fbf844f-sn422
      - elasticsearch-cdm-zjf34ved-2-dfbd988bc-qkzjz
      - elasticsearch-cdm-zjf34ved-3-c8f566f7c-t7zkt
    data:
      failed: []
      notReady: []
      ready:
      - elasticsearch-cdm-zjf34ved-1-6d7fbf844f-sn422
      - elasticsearch-cdm-zjf34ved-2-dfbd988bc-qkzjz
      - elasticsearch-cdm-zjf34ved-3-c8f566f7c-t7zkt
    master:
      failed: []
      notReady: []
      ready:
      - elasticsearch-cdm-zjf34ved-1-6d7fbf844f-sn422
      - elasticsearch-cdm-zjf34ved-2-dfbd988bc-qkzjz
      - elasticsearch-cdm-zjf34ved-3-c8f566f7c-t7zkt
  shardAllocationEnabled: all
      1
      In the output, the cluster status fields appear in the status stanza.
      2
      The status of the Elasticsearch cluster:
      • The number of active primary shards.
      • The number of active shards.
      • The number of shards that are initializing.
      • The number of Elasticsearch data nodes.
      • The total number of Elasticsearch nodes.
      • The number of pending tasks.
      • The Elasticsearch status: green, red, yellow.
      • The number of unassigned shards.
      3
      Any status conditions, if present. The Elasticsearch cluster status indicates the reasons from the scheduler if a pod could not be placed. Any events related to the following conditions are shown:
      • Container Waiting for both the Elasticsearch and proxy containers.
      • Container Terminated for both the Elasticsearch and proxy containers.
      • Pod unschedulable. Also, a condition is shown for a number of issues, see Example condition messages.
      4
      The Elasticsearch nodes in the cluster, with upgradeStatus.
      5
      The Elasticsearch client, data, and master pods in the cluster, listed under 'failed`, notReady or ready state.

9.1.1. Example condition messages

The following are examples of some condition messages from the Status section of the Elasticsearch instance.

This status message indicates a node has exceeded the configured low watermark and no shard will be allocated to this node. 

status:
  nodes:
  - conditions:
    - lastTransitionTime: 2019-03-15T15:57:22Z
      message: Disk storage usage for node is 27.5gb (36.74%). Shards will be not
        be allocated on this node.
      reason: Disk Watermark Low
      status: "True"
      type: NodeStorage
    deploymentName: example-elasticsearch-cdm-0-1
    upgradeStatus: {}

This status message indicates a node has exceeded the configured high watermark and shards will be relocated to other nodes. 

status:
  nodes:
  - conditions:
    - lastTransitionTime: 2019-03-15T16:04:45Z
      message: Disk storage usage for node is 27.5gb (36.74%). Shards will be relocated
        from this node.
      reason: Disk Watermark High
      status: "True"
      type: NodeStorage
    deploymentName: example-elasticsearch-cdm-0-1
    upgradeStatus: {}

This status message indicates the Elasticsearch node selector in the CR does not match any nodes in the cluster: 

status:
    nodes:
    - conditions:
      - lastTransitionTime: 2019-04-10T02:26:24Z
        message: '0/8 nodes are available: 8 node(s) didn''t match node selector.'
        reason: Unschedulable
        status: "True"
        type: Unschedulable

This status message indicates that the Elasticsearch CR uses a non-existent PVC. 

status:
   nodes:
   - conditions:
     - last Transition Time:  2019-04-10T05:55:51Z
       message:               pod has unbound immediate PersistentVolumeClaims (repeated 5 times)
       reason:                Unschedulable
       status:                True
       type:                  Unschedulable

This status message indicates that your Elasticsearch cluster does not have enough nodes to support your Elasticsearch redundancy policy. 

status:
  clusterHealth: ""
  conditions:
  - lastTransitionTime: 2019-04-17T20:01:31Z
    message: Wrong RedundancyPolicy selected. Choose different RedundancyPolicy or
      add more nodes with data roles
    reason: Invalid Settings
    status: "True"
    type: InvalidRedundancy

This status message indicates your cluster has too many master nodes: 

status:
  clusterHealth: green
  conditions:
    - lastTransitionTime: '2019-04-17T20:12:34Z'
      message: >-
        Invalid master nodes count. Please ensure there are no more than 3 total
        nodes with master roles
      reason: Invalid Settings
      status: 'True'
      type: InvalidMasters

9.2. Viewing Elasticsearch component status

You can view the status for a number of Elasticsearch components.

Elasticsearch indices

You can view the status of the Elasticsearch indices.

  1. Get the name of an Elasticsearch pod: 

    $ oc get pods --selector component=elasticsearch -o name

pod/elasticsearch-cdm-1godmszn-1-6f8495-vp4lw
pod/elasticsearch-cdm-1godmszn-2-5769cf-9ms2n
pod/elasticsearch-cdm-1godmszn-3-f66f7d-zqkz7

  2. Get the status of the indices: 

    $ oc exec elasticsearch-cdm-1godmszn-1-6f8495-vp4lw -- indices

Defaulting container name to elasticsearch.
Use 'oc describe pod/elasticsearch-cdm-1godmszn-1-6f8495-vp4lw -n openshift-logging' to see all of the containers in this pod.
Wed Apr 10 05:42:12 UTC 2019
health status index                                            uuid                   pri rep docs.count docs.deleted store.size pri.store.size
red    open   .kibana.647a750f1787408bf50088234ec0edd5a6a9b2ac N7iCbRjSSc2bGhn8Cpc7Jg   2   1
green  open   .operations.2019.04.10                           GTewEJEzQjaus9QjvBBnGg   3   1    2176114            0       3929           1956
green  open   .operations.2019.04.11                           ausZHoKxTNOoBvv9RlXfrw   3   1    1494624            0       2947           1475
green  open   .kibana                                          9Fltn1D0QHSnFMXpphZ--Q   1   1          1            0          0              0
green  open   .searchguard                                     chOwDnQlSsqhfSPcot1Yiw   1   1          5            1          0              0
Elasticsearch pods

You can view the status of the Elasticsearch pods.

  1. Get the name of a pod: 

    $ oc get pods --selector component=elasticsearch -o name

pod/elasticsearch-cdm-1godmszn-1-6f8495-vp4lw
pod/elasticsearch-cdm-1godmszn-2-5769cf-9ms2n
pod/elasticsearch-cdm-1godmszn-3-f66f7d-zqkz7

  2. Get the status of a pod: 

    oc describe pod elasticsearch-cdm-1godmszn-1-6f8495-vp4lw

    The output includes the following status information: 

    ....
Status:             Running

....

Containers:
  elasticsearch:
    Container ID:   cri-o://b7d44e0a9ea486e27f47763f5bb4c39dfd2
    State:          Running
      Started:      Mon, 08 Apr 2019 10:17:56 -0400
    Ready:          True
    Restart Count:  0
    Readiness:  exec [/usr/share/elasticsearch/probe/readiness.sh] delay=10s timeout=30s period=5s #success=1 #failure=3

....

  proxy:
    Container ID:  cri-o://3f77032abaddbb1652c116278652908dc01860320b8a4e741d06894b2f8f9aa1
    State:          Running
      Started:      Mon, 08 Apr 2019 10:18:38 -0400
    Ready:          True
    Restart Count:  0

....

Conditions:
  Type              Status
  Initialized       True
  Ready             True
  ContainersReady   True
  PodScheduled      True

....

Events:          <none>
Elasticsearch deployment configuration

You can view the status of the Elasticsearch deployment configuration.

  1. Get the name of a deployment configuration: 

    $ oc get deployment --selector component=elasticsearch -o name

deployment.extensions/elasticsearch-cdm-1gon-1
deployment.extensions/elasticsearch-cdm-1gon-2
deployment.extensions/elasticsearch-cdm-1gon-3

  2. Get the deployment configuration status: 

    $ oc describe deployment elasticsearch-cdm-1gon-1

    The output includes the following status information: 

    ....
  Containers:
   elasticsearch:
    Image:      registry.redhat.io/openshift4/ose-logging-elasticsearch5:v4.2
    Readiness:  exec [/usr/share/elasticsearch/probe/readiness.sh] delay=10s timeout=30s period=5s #success=1 #failure=3

....

Conditions:
  Type           Status   Reason
  ----           ------   ------
  Progressing    Unknown  DeploymentPaused
  Available      True     MinimumReplicasAvailable

....

Events:          <none>
Elasticsearch ReplicaSet

You can view the status of the Elasticsearch ReplicaSet.

  1. Get the name of a replica set: 

    $ oc get replicaSet --selector component=elasticsearch -o name

replicaset.extensions/elasticsearch-cdm-1gon-1-6f8495
replicaset.extensions/elasticsearch-cdm-1gon-2-5769cf
replicaset.extensions/elasticsearch-cdm-1gon-3-f66f7d

  2. Get the status of the replica set: 

    $ oc describe replicaSet elasticsearch-cdm-1gon-1-6f8495

    The output includes the following status information: 

    ....
  Containers:
   elasticsearch:
    Image:      registry.redhat.io/openshift4/ose-logging-elasticsearch5:v4.2
    Readiness:  exec [/usr/share/elasticsearch/probe/readiness.sh] delay=10s timeout=30s period=5s #success=1 #failure=3

....

Events:          <none>
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