k8s常用操作整理

容器操作

• 常用命令

# 获得所有布署
kubectl get svc --all-namespaces
# 获得所有容器
kubectl pod svc --all-namespaces
# 修改布署文件
kubectl edit svc/<svc name> -n <namespace>
# 强制删除特定pods
#kubectl delete pods cloudagile-mariadb-0 -n intelligence-data-lab –grace-period=0 --force
# 删除集群失败的pods
kubectl get pods --field-selector=status.phase=Failed --all-namespaces |awk '{ system("kubectl delete pod "$2" -n "$1) }'
# 强制删除Terminating状态的pods
kubectl get pods --all-namespaces |grep Terminating||grep -w "0/1"|awk '{ system("kubectl delete pod "$2" -n "$1" --grace-period=0 --force") }'
# 删除空间
kubectl delete namespace <namespace>
# 修改部署的节点数
kubectl scale --replicas=2 deployment/serviceutil
# 回滚
kubectl rollout undo deployment/

• 有状态容器重启
  有状态容器重启要节点数改为0，再恢复到原来的值。
  rancher上的操作可以直接伸缩容器

# 修改部署的节点数
kubectl scale --replicas=2 deployment/<pod name>

标记标签(可以指定布署到标签)

# 查询所有标签
kubectl get nodes --show-labels
# 需要将对外的那台主机进行标记标签
kubectl label nodes 192.168.71.104 type=outer

污点(其它pod不分配到污点机器, 容忍的机器可以布署到这台机器)

• 设置node

# 为主机设置污点标签
kubectl taint nodes 192.168.xxx.xxx skywalking_namespace=skywalking:NoExecute --overwrite
# 设置调度标签
kubectl label nodes 192.168.xxx.xxx skywalking_namespace=skywalking --overwrite

• 配置pod

# 为部署设置污点容忍
tolerations:
- key: "skywalking_namespace"
  operator: "Equal"
  value: "skywalking"
  effect: "NoExecute"
# 设置标签符合
nodeSelector:
  tristan_namespace: "skywalking"

k8s network

• 开启服务

---
apiVersion: v1
kind: Service
metadata:
  name: kibana4log
spec:
  selector:
    app: kibana4log
  ports:
    - protocol: TCP
      port: 80
      targetPort: 5601

• 开启dns

---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: kibana-ingress
  namespace: logging
  annotations:
    kubernetes.io/ingress.class: traefik
    traefik.ingress.kubernetes.io/auth-type: "basic"
    traefik.ingress.kubernetes.io/auth-secret: "basic-auth"
spec:
  rules:
    - host: kibana.java.yibainetwork.com
      http:
        paths:
          - backend:
              serviceName: kibana4log
              servicePort: 80

• 转发内部网络到外部

kubectl port-forward service/ok 8080:8080 8081:80 -n the-project

docker反向工程

• docker image inspect

• 使用dockerfile-from-image工具

# 安装nodejs
curl --silent --location https://rpm.nodesource.com/setup_10.x | bash -
yum install -y nodejs
npm install -g cnpm --registry=https://registry.npm.taobao.org
npm install
npm run build
npm -v
npx dockerfile-from-image tensorflow/tensorflow:latest-py3 > dockerfile

es清除数据

curl -XGET 'http://127.0.0.1:9200/_cat/indices/?v'
GET /_cat/indices/?v
curl -XDELETE 'http://127.0.0.1:9200/索引名字'
DELETE /*-2019.07*

docker清除镜像

docker system prune -a

es减少副本数

.spec.revisionHistoryLimit

查看详情

kubectl describe node <节点名称>
kubectl get node -o wide