kubectl格式化输出

_事件查看

---

1.  查看事件并输出资源类型名称

   kubectl get events -A  -o=jsonpath='{range .items[*]}{.involvedObject.namespace} {.involvedObject.name} {.involvedObject.kind} {.source.component} {.source.name} {.message}{"\n"}{end}' 

2.  按时间降序查看日志

   kubectl get events --sort-by='.metadata.creationTimestamp'

    

Pod查看

---

1.  查看Pod，按重启次数排序

   kubectl get pods -A  --sort-by='.status.containerStatuses[0].restartCount'

2. 统计集群中所有Pods的状态
   方法一
   

   kubectl get pods  --all-namespaces  | awk -F " " '{print $4}' | sort | uniq -c
         1 Completed
        36 ContainerCreating
         5 CrashLoopBackOff
         5 CreateContainerError
         1 Error
       966 Evicted
        69 Pending
      3504 Running
         1 STATUS
       320 Terminating

   方法二

   [root@sh-bs-b1-303-d10-uatccemaster-0-2 ~]# kubectl get pods --all-namespaces -o=jsonpath='{range .items[*]}{.metadata.namespace} {.metadata.name} {.status.phase}{"\n"}{end}' | awk -F " " '{print $3}' | sort | uniq -c
       966 Failed
       116 Pending
      3824 Running
         1 Succeeded

3. 查看指定的Pods的运行状态

   kubectl get pod -n ad-effective ad-brand-web-bfd894b8c-sznlc -o=jsonpath='{.status}' | jq -r

4. 获取集群中Evicted的Pods

   kubectl get pods --all-namespaces | grep Evicted
   或者使用
   kubectl get pods --all-namespaces --field-selector=status.phase=Failed -o=jsonpath='{range .items[?(@.status.reason=="Evicted")]}{.metadata.namespace} {.metadata.name}{"\n"}{end}'

5. 清理Evicted的Pods

   kubectl get pods --all-namespaces --field-selector=status.phase=Failed -o jsonpath='{range .items[?(@.status.reason=="Evicted")]}{.metadata.name}{" "}{.metadata.namespace}{"\n"}{end}' |
   while read -r pod namespace; do
       echo -e "\e[1;34mDeleting Pod: $pod in Namespace: $namespace\e[0m"
       echo -e "\e[1;33m-----------------------------\e[0m"
       kubectl delete pod -n "$namespace" "$pod" --grace-period=0 --force
   done

6. 清理集群中Terminating的Pods

   kubectl get pods --all-namespaces -o json |
   jq -r '.items[] | select(.metadata.deletionTimestamp != null) | .metadata.namespace + " " + .metadata.name' |
   while read -r namespace pod; do
       echo -e "\e[1;34mDeleting Pod: $pod in Namespace: $namespace\e[0m"
       echo -e "\e[1;33m-----------------------------\e[0m"
       kubectl delete pod -n "$namespace" "$pod" --grace-period=0 --force
   done

   kubectl get pods --all-namespaces | awk '/Terminating/{print $1, $2}' | while read -r namespace pod; do echo "Deleting Pod: $namespace/$pod"; kubectl delete pod -n "$namespace" "$pod" --grace-period=0 --force; done

7. 清理集群中NotReady的Pods
   先查看集群中NotReady的Pods

   kubectl get pods --all-namespaces -o json | jq -r '.items[] | select(.status.conditions != null and any(.status.conditions[]; .type == "Ready" and .status == "False")) | .metadata.namespace + " " + .metadata.name'

   方法一 清理集群中NotReady的Pods

   kubectl get pods --all-namespaces -o json |
   jq -r '.items[] | select(.status.conditions[].type=="Ready" and .status.conditions[].status=="False") | .metadata.namespace + " " + .metadata.name' |
   while read -r namespace pod; do
       echo -e "\033[1;31mDeleting NotReady Pod: $namespace/$pod\033[0m"
       kubectl delete pod -n "$namespace" "$pod" --grace-period=0 --force
       echo "--------------------------------------------------"
   done

   方法二 

   kubectl get pods --all-namespaces -o jsonpath='{range .items[?(@.status.conditions)]}{.metadata.namespace} {.metadata.name}{"\n"}{end}' |
   while read -r namespace pod; do
     ready=$(kubectl get pod -n "$namespace" "$pod" -o jsonpath='{.status.conditions[?(@.type=="Ready")].status}')
     if [[ $ready != "True" ]]; then
       echo -e "\033[1;31mDeleting NotReady Pod: $namespace/$pod\033[0m"
       kubectl delete pod -n "$namespace" "$pod" --grace-period=0 --force
       echo "--------------------------------------------------"
     fi
   done