准备工作
Docker拉取mysql镜像和tomcat镜像
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| sudo docker pull mysql:5.7
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| sudo docker pull kubeguide/tomcat-app:v1
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为了解决， kubernetes pod卡在ContainerCreating的问题
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| sudo docker pull registry.cn-hangzhou.aliyuncs.com/sunyuki/pod-infrastructure
sudo docker tag f66f4bd9b894 registry.access.redhat.com/rhel7/pod-infrastructure:latest
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创建 rc, svc yaml
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| apiVersion: v1
kind: ReplicationController
metadata:
name: mysql
spec:
replicas: 1
selector:
app: mysql
template:
metadata:
labels:
app: mysql
spec:
containers:
- name: mysql
image: mysql:5.7
ports:
- containerPort: 3306
env:
- name: MYSQL_ROOT_PASSWORD
value: "123456"
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| apiVersion: v1
kind: Service
metadata:
name: mysql
spec:
ports:
- port: 3306
selector:
app: mysql
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| apiVersion: v1
kind: ReplicationController
metadata:
name: myweb
spec:
replicas: 1
selector:
app: myweb
template:
metadata:
labels:
app: myweb
spec:
containers:
- name: myweb
image: kubeguide/tomcat-app:v1
ports:
- containerPort: 8080
env:
- name: MYSQL_SERVICE_HOST
value: "mysql"
- name: MYSQL_SERVICE_PORT
value: "3306"
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| apiVersion: v1
kind: Service
metadata:
name: myweb
spec:
type: NodePort
ports:
- port: 8080
nodePort: 30001
selector:
app: myweb
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| sudo kubectl create -f mysql-rc.yaml
sudo kubectl create -f mysql-svc.yaml
sudo kubectl create -f myweb-rc.yaml
sudo kubectl create -f myweb-svc.yaml
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| sudo kubectl delete -f mysql-rc.yaml
sudo kubectl delete -f mysql-svc.yaml
sudo kubectl delete -f myweb-rc.yaml
sudo kubectl delete -f myweb-svc.yaml
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| sudo kubectl get rc
sudo kubectl get svc
sudo kubectl get pods
sudo kubectl get ep
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| kubectl get ep
[root@localhost ~]# kubectl exec -ti myweb-qrjsd -- /bin/bash
root@myweb-qrjsd:/usr/local/tomcat# echo $MYSQL_SERVICE_HOST
mysql
root@myweb-qrjsd:/usr/local/tomcat# echo "172.17.0.2 mysql" >> /etc/hosts
root@myweb-qrjsd:/usr/local/tomcat#
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使用127.0.0.1:30001/demo打开页面
参考文章