kubernetes简单示例

1. 安装
yum install -y etcd kubernetes
2. 启动
systemctl start etcd
systemctl start docker
systemctl start kube-apiserver
systemctl start kube-controller-manager
systemctl start kube-scheduler
systemctl start kubelet
systemctl start kube-proxy
3. 拉镜像
docker pull daocloud.io/library/mysql
docker pull daocloud.io/library/tomcat
4. 创建YAML文件
mysql-rc.yaml
 1 apiVersion: v1
 2 kind: ReplicationController
 3 metadata:
 4     name: mysql
 5 spec:
 6     replicas: 1
 7     selector:
 8         app: mysql
 9     template:
10         metadata:
11             labels:
12                 app: mysql
13         spec:
14             containers:
15             - name: mysql
16               image: daocloud.io/library/mysql
17               ports:
18               - containerPort: 3306
19               env:
20               - name: MYSQL_ROOT_PASSWORD
21                 value: "123456"
mysql-svc.yaml
1 apiVersion: v1
2 kind: Service
3 metadata: 
4     name: mysql
5 spec: 
6     ports: 
7       - port: 3306
8     selector:
9       app: mysql

 

 myweb-rc.yaml
 apiVersion: v1
 1 apiVersion: v1
 2 kind: ReplicationController
 3 metadata: 
 4     name: myweb
 5 spec: 
 6     replicas: 3
 7     selector: 
 8         app: myweb
 9     template: 
10         metadata: 
11             labels: 
12                 app: myweb
13         spec: 
14             containers: 
15             - name: myweb
16               image: daocloud.io/library/tomcat
17               ports: 
18               - containerPort: 8080
19               env: 
20               - name: MYSQL_SERVICE_HOST
21                 value: "mysql"
22               - name: MYSQL_SERVICE_PORT
23                 value: "3306"

 

 myweb-svc.yaml
1 apiVersion: v1
2 kind: Service
3 metadata: 
4     name: mysql
5 spec: 
6     ports: 
7       - port: 3306
8     selector:
9       app: mysql
 
5.创建replicationController以及Service
kubectl create -f /XX/mysql-rc.yaml
kubectl create -f /XX/mysql-svc.yaml
kubectl create -f /XX/myweb-rc.yaml
kubectl create -f /XX/myweb-svc.yaml

 

 
6. 查看RC和Service运行状态
kubectl get pod mysql（应该是running状态）
kubectl get service mysql
kubectl get pod myweb（应该是running状态）
kubectl get service myweb

 

 
7. 查看kubectl的日志（如果有问题，则查看相应日志）
kubectl describe pod mysql(myweb)
kubectl describe service mysql(myweb)

 

 
8. 确认服务
http://ip:8080是否跳转到tomcat的欢迎页面，跳转则安装成功；
 
看到此处发现mysql其实并没有啥用，但是其实原始demo的tomcat是从hub.docker.com/u/kubeguide下面拉取，但是被墙了，于是就用daocloude的tomcat做替换。

posted on 2018-03-18 11:39  张叫兽的技术研究院  阅读(191)  评论(0)  编辑  收藏  举报

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