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第 12 章 日志故障排除

12.1. 查看 OpenShift Logging 状态
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您可以查看 Red Hat OpenShift Logging Operator 的状态以及多个 OpenShift Logging 组件的状态。

12.1.1. 查看 Red Hat OpenShift Logging Operator 的状态
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您可以查看 Red Hat OpenShift Logging Operator 的状态。

先决条件

  • 必须安装 OpenShift Logging 和 Elasticsearch。

流程

  1. 进入 openshift-logging 项目。 

    $ oc project openshift-logging

  2. 查看 OpenShift Logging 状态：

    1. 获取 OpenShift Logging 状态： 

      $ oc get clusterlogging instance -o yaml

      输出示例

      apiVersion: logging.openshift.io/v1
kind: ClusterLogging

....

status:
      1 
      
  collection:
    logs:
      fluentdStatus:
        daemonSet: fluentd
      2 
      
        nodes:
          fluentd-2rhqp: ip-10-0-169-13.ec2.internal
          fluentd-6fgjh: ip-10-0-165-244.ec2.internal
          fluentd-6l2ff: ip-10-0-128-218.ec2.internal
          fluentd-54nx5: ip-10-0-139-30.ec2.internal
          fluentd-flpnn: ip-10-0-147-228.ec2.internal
          fluentd-n2frh: ip-10-0-157-45.ec2.internal
        pods:
          failed: []
          notReady: []
          ready:
          - fluentd-2rhqp
          - fluentd-54nx5
          - fluentd-6fgjh
          - fluentd-6l2ff
          - fluentd-flpnn
          - fluentd-n2frh
  logstore:
      3 
      
    elasticsearchStatus:
    - ShardAllocationEnabled:  all
      cluster:
        activePrimaryShards:    5
        activeShards:           5
        initializingShards:     0
        numDataNodes:           1
        numNodes:               1
        pendingTasks:           0
        relocatingShards:       0
        status:                 green
        unassignedShards:       0
      clusterName:             elasticsearch
      nodeConditions:
        elasticsearch-cdm-mkkdys93-1:
      nodeCount:  1
      pods:
        client:
          failed:
          notReady:
          ready:
          - elasticsearch-cdm-mkkdys93-1-7f7c6-mjm7c
        data:
          failed:
          notReady:
          ready:
          - elasticsearch-cdm-mkkdys93-1-7f7c6-mjm7c
        master:
          failed:
          notReady:
          ready:
          - elasticsearch-cdm-mkkdys93-1-7f7c6-mjm7c
visualization:
      4 
      
    kibanaStatus:
    - deployment: kibana
      pods:
        failed: []
        notReady: []
        ready:
        - kibana-7fb4fd4cc9-f2nls
      replicaSets:
      - kibana-7fb4fd4cc9
      replicas: 1

      1
      在输出中，集群状态字段显示在 status 小节中。
      2
      Fluentd Pod 的相关信息。
      3
      Elasticsearch Pod 的相关信息，包括 Elasticsearch 集群健康状态 green、yellow 或 red。
      4
      Kibana Pod 的相关信息。

12.1.1.1. 情况消息示例
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以下是来自 OpenShift Logging 实例的 Status.Nodes 部分的一些情况消息示例。

类似于以下内容的状态消息表示节点已超过配置的低水位线，并且没有分片将分配给此节点：

输出示例

  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-clientdatamaster-0-1
    upgradeStatus: {}

类似于以下内容的状态消息表示节点已超过配置的高水位线，并且分片将重新定位到其他节点：

输出示例

  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: cluster-logging-operator
    upgradeStatus: {}

类似于以下内容的状态消息表示 CR 中的 Elasticsearch 节点选择器与集群中的任何节点都不匹配：

输出示例

    Elasticsearch Status:
      Shard Allocation Enabled:  shard allocation unknown
      Cluster:
        Active Primary Shards:  0
        Active Shards:          0
        Initializing Shards:    0
        Num Data Nodes:         0
        Num Nodes:              0
        Pending Tasks:          0
        Relocating Shards:      0
        Status:                 cluster health unknown
        Unassigned Shards:      0
      Cluster Name:             elasticsearch
      Node Conditions:
        elasticsearch-cdm-mkkdys93-1:
          Last Transition Time:  2019-06-26T03:37:32Z
          Message:               0/5 nodes are available: 5 node(s) didn't match node selector.
          Reason:                Unschedulable
          Status:                True
          Type:                  Unschedulable
        elasticsearch-cdm-mkkdys93-2:
      Node Count:  2
      Pods:
        Client:
          Failed:
          Not Ready:
            elasticsearch-cdm-mkkdys93-1-75dd69dccd-f7f49
            elasticsearch-cdm-mkkdys93-2-67c64f5f4c-n58vl
          Ready:
        Data:
          Failed:
          Not Ready:
            elasticsearch-cdm-mkkdys93-1-75dd69dccd-f7f49
            elasticsearch-cdm-mkkdys93-2-67c64f5f4c-n58vl
          Ready:
        Master:
          Failed:
          Not Ready:
            elasticsearch-cdm-mkkdys93-1-75dd69dccd-f7f49
            elasticsearch-cdm-mkkdys93-2-67c64f5f4c-n58vl
          Ready:

类似于以下内容的状态消息表示请求的 PVC 无法绑定到 PV：

输出示例

      Node Conditions:
        elasticsearch-cdm-mkkdys93-1:
          Last Transition Time:  2019-06-26T03:37:32Z
          Message:               pod has unbound immediate PersistentVolumeClaims (repeated 5 times)
          Reason:                Unschedulable
          Status:                True
          Type:                  Unschedulable

类似于以下内容的状态消息表示无法调度 Fluentd Pod，因为节点选择器与任何节点都不匹配：

输出示例

Status:
  Collection:
    Logs:
      Fluentd Status:
        Daemon Set:  fluentd
        Nodes:
        Pods:
          Failed:
          Not Ready:
          Ready:

12.1.2. 查看 OpenShift Logging 组件的状态
复制链接

您可以查看多个 OpenShift Logging 组件的状态。

先决条件

  • 必须安装 OpenShift Logging 和 Elasticsearch。

流程

  1. 进入 openshift-logging 项目。 

    $ oc project openshift-logging

  2. 查看 OpenShift Logging 环境的状态： 

    $ oc describe deployment cluster-logging-operator

    输出示例

    Name:                   cluster-logging-operator

....

Conditions:
  Type           Status  Reason
  ----           ------  ------
  Available      True    MinimumReplicasAvailable
  Progressing    True    NewReplicaSetAvailable

....

Events:
  Type    Reason             Age   From                   Message
  ----    ------             ----  ----                   -------
  Normal  ScalingReplicaSet  62m   deployment-controller  Scaled up replica set cluster-logging-operator-574b8987df to 1----

  3. 查看 OpenShift Logging 副本集的状态：

    1. 获取副本集的名称：

      输出示例

      $ oc get replicaset

      输出示例

      NAME                                      DESIRED   CURRENT   READY   AGE
cluster-logging-operator-574b8987df       1         1         1       159m
elasticsearch-cdm-uhr537yu-1-6869694fb    1         1         1       157m
elasticsearch-cdm-uhr537yu-2-857b6d676f   1         1         1       156m
elasticsearch-cdm-uhr537yu-3-5b6fdd8cfd   1         1         1       155m
kibana-5bd5544f87                         1         1         1       157m

    2. 获取副本集的状态： 

      $ oc describe replicaset cluster-logging-operator-574b8987df

      输出示例

      Name:           cluster-logging-operator-574b8987df

....

Replicas:       1 current / 1 desired
Pods Status:    1 Running / 0 Waiting / 0 Succeeded / 0 Failed

....

Events:
  Type    Reason            Age   From                   Message
  ----    ------            ----  ----                   -------
  Normal  SuccessfulCreate  66m   replicaset-controller  Created pod: cluster-logging-operator-574b8987df-qjhqv----

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