k8s常用的排查命令
- 1. 查看组件状态#kubectl get cs
- 2. 查看集群状态#kubectl cluster-info
- 3. 查看node状态#kubectl get node
- 4. 查看pod#kubectl get pod -owide -A 查看所有命名空间的pod
- 5. 查看svc
- 6. 查看组件日志获取核心组件：
- 7. kubelet日志#cd /cloud/app/kube-base/NodeDaemon#/kubelet/current/
- 8. 其他命令请参考
1. 查看组件状态#kubectl get cs
NAME STATUS MESSAGE ERROR
scheduler Healthy ok
controller-manager Healthy ok
etcd-1 Healthy {"health":"true"}
etcd-2 Healthy {"health":"true"}
etcd-0 Healthy {"health":"true"}
2. 查看集群状态#kubectl cluster-info
Kubernetes master is running at https://10.45.1.1:6443
metrics-server is running at https://10.45.1.1:6443/api/v1/namespaces/kube-system/services/heapster/proxy
KubeDNS is running at https://10.45.1.1:6443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy
To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
导出集群信息供排查
#kubectl cluster-info dump --namespace kube-system --output-directory=/path/to/cluster-state
3. 查看node状态#kubectl get node
NAME STATUS ROLES AGE VERSION
c43k090101.cloud.k09 Ready master,minio-0,ops1,prometheus,redis-0,worker 6d22h v1.14.8-aliyun.1
c43k090108.cloud.k09 Ready worker 6d20h v1.14.8-aliyun.1
c43k090109.cloud.k09 Ready worker 6d20h v1.14.8-aliyun.1
c43k090110.cloud.k09 Ready worker 6d20h v1.14.8-aliyun.1
c43k090111.cloud.k09 Ready worker 6d20h v1.14.8-aliyun.1
c43k090112.cloud.k09 Ready worker 6d20h v1.14.8-aliyun.1
c43k090113.cloud.k09 Ready worker 6d20h v1.14.8-aliyun.1
c43k090114.cloud.k09 Ready worker 6d20h v1.14.8-aliyun.1
c43k090115.cloud.k09 Ready worker 6d20h v1.14.8-aliyun.1
c43k09012.cloud.k09 Ready master,minio-1,prometheus,redis-1,worker 6d22h v1.14.8-aliyun.1
c43k09108.cloud.k10. Ready master,minio-2,redis-2,worker 6d22h v1.14.8-aliyun.1
#kubectl describe node
4. 查看pod#kubectl get pod -owide -A 查看所有命名空间的pod
#kubectl get pod -owide -n 查看指定命名空间的pod
#kubectl get pod -oyaml -n 查看pod定义及状态
#kubectl describe pod -n 查看pod信息及event事件
#kubectl logs -f -n -c 查看pod日志
5. 查看svc
#kubectl get svc -owide -A 查看所有命名空间的svc
#kubectl get svc -owide -n 查看指定命名空间的svc
#kubectl get svc -oyaml -n 查看svc定义及状态
#kubectl describe svc -n 查看svc信息,event及后端endpoint
6. 查看组件日志获取核心组件：
#kubectl get pod -l component=xxx -n kube-system (component:kube-apiserver/kube-controller-manager/kube-scheduler)
获取addon组件：
#kubectl get pod -l k8s-app=xxx -n kube-system (k8s-app:kube-dns/kube-proxy-master/kube-proxy-worker)
查看日志
#kubectl logs -n kube-system
查看上一次的log
#kubectl logs -n kube-system --previous
获取集群日志
#kubectl cluster-info dump --namespace default,kube-system,... --output-directory=/path/to/dump
7. kubelet日志#cd /cloud/app/kube-base/NodeDaemon#/kubelet/current/
#vim log/tianji/stderr
#vim log/tianji/stdout
8. 其他命令请参考
https://kubernetes.io/zh/docs/reference/kubectl/cheatsheet/
https://jimmysong.io/kubernetes-handbook/guide/kubectl-cheatsheet.html
