k8s脚本部署

创建部署

部署命令

kubectl create -f 部署文件

部署文件demo

vim tomcat-deploy.yml

apiVersion: apps/v1
kind: Deployment
metadata:
     name: tomcat-deploy
spec:
     replicas: 3
     selector:
       matchLabels:
         k8s-app: tomcat-cluster
     template:
       metadata:
         labels:
           k8s-app: tomcat-cluster
       spec:
         containers:
      - name: tomcat-cluster
        image: tomcat:latest
        ports:
        - containerPort: 8080

创建部署

kubectl create -f ./tomcat-deploy.yml

查看当前所有当前的部署

kubectl get deployment

更新部署配置

更新部署配置

kubectl apply -f 部署文件

查看已部署的pod

查看已部署的pod

kubectl get pod [-o wide]
kubectl get pod -o wide

查看pod详细信息

查看pod详细信息

kubectl describe pod pod名称
kubectl describe pod tomcat-deploy-575dfb665d-6j59w

查看pod输出日志

查看pod输出日志

kubectl logs [-f] pod名称
kubectl logs tomcat-deploy-575dfb665d-6j59w

删除deployment

kubectl delete -n default deployment 部署名称
kubectl delete -n default deployment tomcat-deploy

k8s脚本服务

创建服务

服务文件demo

vim tomcat-service.yml

apiVersion: v1
kind: Service
metadata:
     name: tomcat-service
     labels:
        k8s-app: tomcat-service
spec:
     type: NodePort
     selector:
        k8s-app: tomcat-cluster
     ports:
  - port: 8000
    targetPort: 8080
    nodePort: 31000

创建服务

kubectl create -f ./tomcat-service.yml

更新服务

kubectl apply -f 部署文件

查看已部署的服务

kubectl get service

查看服务详情

kubectl describe service 服务名称
kubectl describe service tomcat-service

使用Rinetd给service做负载均衡

Rinted安装

wget http://www.boutell.com/rinetd/http/rinetd.tar.gz
tar -zxvf rinetd.tar.gz
cd rinetd
sed -i 's/65536/65535/g' rinetd.c
mkdir -p /usr/man/
make && make install

更新Rinted配置

vim /etc/rinetd.conf

0.0.0.0 8080 192.168.31.131 8080
0.0.0.0 8000 192.168.31.131 8000

启动Rinted

rinetd -c /etc/rinetd.conf

停止rinted

pkill rinetd

查看端口映射是否成功

netstat -tulpn

删除服务

kubectl delete service 服务名
kubectl delete service tomcat-service

更新服务配置

vim tomcat-service.yml

apiVersion: v1
kind: Service
metadata:
   name: tomcat-service
   labels:
       k8s-app: tomcat-service
spec:
# type: NodePort
   selector:
       k8s-app: tomcat-cluster
   ports:
  - port: 8000
    targetPort: 8080
#    nodePort: 31000

重新启动服务

kubectl create -f tomcat-service.yml

docker 文件拷贝

从宿主机拷文件到容器里面

在宿主机里面执行如下命令

docker cp 要拷贝的文件路径 容器名：要拷贝到容器里面对应的路径
docker cp -r /mnt/test/index.jsp 620da4525448:/usr/local/tomcat/webapps/test

从容器里面拷文件到宿主机

在宿主机里面执行以下命令

docker cp 容器名：要拷贝的文件在容器里面的路径       要拷贝到宿主机的相应路径 
docker cp 620da4525448:/usr/local/tomcat/webapps/test/index.jsp ~/index.jsp

进入docker容器

docker exec -it 容器名 /bin/bash
docker exec -it 620da4525448 /bin/bash

k8s service资源挂载

删除service

kubectl delete service tomcat-service

设置资源挂载

apiVersion: apps/v1
kind: Deployment
metadata:
  name: tomcat-deploy
spec:
  replicas: 3
  selector:
    matchLabels:
      k8s-app: tomcat-cluster
  template:
    metadata:
      labels:
        k8s-app: tomcat-cluster
    spec:
      volumes:
      - name: web-app
        hostPath:
          path: /mnt
      containers:
      - name: tomcat-cluster
        image: tomcat:latest
        ports:
        - containerPort: 8080
        volumeMounts:
        - name: web-app
          mountPath: /usr/local/tomcat/webapps

更新Deployment配置

kubectl apply -f tomcat-deploy.yml

启动Service

kubectl create -f tomcat-service.yml

k8s service服务资源限定

删除service

kubectl delete service tomcat-service

设置资源限定

apiVersion: apps/v1
kind: Deployment
metadata:
  name: tomcat-deploy
spec:
  replicas: 2
  selector:
    matchLabels:
      k8s-app: tomcat-cluster
  template:
    metadata:
      labels:
        k8s-app: tomcat-cluster
    spec:
      volumes:
      - name: web-app
        hostPath:
          path: /mnt
      containers:
      - name: tomcat-cluster
        image: tomcat:latest
        resources: 
          requests:
            cpu: 0.5
            memory: 200Mi
          limits: 
            cpu: 1
            memory: 512Mi
        ports:
        - containerPort: 8080
        volumeMounts:
        - name: web-app
          mountPath: /usr/local/tomcat/webapps

更新Deployment配置

kubectl apply -f tomcat-deploy.yml

启动Service

kubectl create -f tomcat-service.yml

设置容器启动命令

image: tomcat:latest
command: ["/bin/sh"]
args: ["-c","cd 路径;java -jar *.jar"]