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Tencent Kubernetes Engine
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    Health Check

    Last updated: 2024-12-23 15:29:48
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      Overview

      The cluster health check feature is a service provided by Tencent Kubernetes Engine (TKE) for checking the status and health of each resource in a cluster. The resulting check report displays the detailed status and configuration of components, nodes, workloads, and other check items. If an exception is detected, this feature can describe the exception in detail, automatically analyze the severity, cause, and impact, and propose rectification suggestions.
      Note:
      During the health check, namespace tke-cluster-inspection will be automatically created in your cluster, and a Daemonset will be installed to collect node information. Both objects will be automatically deleted after the health check is completed.

      Main Check Items

      Check Category
      Check Item
      Check Content
      Self-Deployed Clusters Only
      Resource status
      kube-apiserver status
      Check whether the component is running. If the component runs as a pod, the health check feature checks whether it has restarted over the past 24 hours
      Yes
      kube-scheduler status
      Yes
      kube-controller-manager status
      Yes
      etcd status
      Yes
      kubelet status
      No
      kube-proxy status
      No
      dockerd status
      No
      Master node status
      Check whether the node status is Ready and free of any other exceptions, such as insufficient memory and insufficient disk space
      Yes
      Worker node status
      Check whether the node status is Ready and free of any other exceptions, such as insufficient memory and insufficient disk space
      No
      Status of each workload
      Check whether the number of currently available pods of the workload meets the expected number of pods
      No
      Running status
      Parameter configuration of kube-apiserver
      Check the following parameters based on the master node configuration:
      max-requests-inflight: maximum number of non-change requests running in a given period
      max-mutating-requests-inflight: maximum number of change requests running in a given period
      Yes
      Parameter configuration of kube-scheduler
      Check the following parameters based on the master node configuration:
      kube-api-qps: QPS of kube-apiserver resquests
      kube-api-burst: maximum burst value during communication with kube-apiserver
      Yes
      Parameter configuration of kube-controller-manager
      Check the following parameters based on the master node configuration:
      kube-api-qps: QPS of kube-apiserver requests
      
      kube-api-burst: maximum burst value during communication with kube-apiserver
      Yes
      Parameter configuration of etcd
      Check the following parameter based on the master node configuration:quota-backend-bytes: storage capacity
      Yes
      Reasonability of the master node configuration
      Check whether the current master node configuration is sufficient to the current cluster scale
      Yes
      High availability of nodes
      Check whether the current cluster is a single-node cluster.Check whether current cluster nodes support multi-AZ disaster recoveryThat is, the health check feature checks whether the total number of resources in other availability zones is sufficient to the current cluster business scale in the event that one availability zone becomes unavailable
      No
      Request and Limit configuration of workloads
      Check whether workloads have configured resource-limiting containers. Configuring resource limits helps improve resource planning, pod scheduling, cluster availability, and other functions
      No
      Anti-affinity configuration of workloads
      Check whether workloads have configured affinity or anti-affinity. Configuring anti-affinity helps improve the high availability of business
      No
      PDB configuration of workloads
      Check whether workloads have configured PDB, which can help prevent your business from becoming unavailable due to eviction.
      No
      Health check configuration of workloads
      Check whether a health check is configured for workloads. Health check helps detect business exceptions
      No
      HPA-IP configuration
      Check whether the current number of remaining pod IP addresses in the cluster meets the maximum number for HPA scale-out
      No
      

      Directions

      1. Log in to the Tencent Kubernetes Engine console and choose Cluster OPS > Health Check in the left sidebar.
      2. On the Health Check page that appears, select the health check mode for the cluster. In the Health Check page, there’re three options: Batch Check, Check Now, and Auto Check.
      Batch Check: simultaneously checks multiple clusters.
      Check Now: checks only one cluster.
      Auto Check: enables periodic health check for the cluster.
      
      In the Auto-Checking Settings window that appears, you can enable/disable auto-check, and set the check period and time based on your needs.
      
      3. When the health check starts, you can view the check progress.
      
      4. After the check is completed, you can click View Check Result to view the check report.
      
      On the check report page, click Resource Status and Running Status tab to view resource statuses and exceptions respectively. Click Check Contents to view the detailed check contents. Click Exceptions to view the exception severity, descriptions, causes, impacts, and rectification suggestions.
      
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