修改软件源
二、安装k8s修改配置
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
yum makecache
安装k8s,etcd,docker
yum install -y etcd kubernetes
启动下列服务:
systemctl start etcd
systemctl start docker
systemctl start kube-apiserver.service
systemctl start kube-controller-manager.service
systemctl start kube-scheduler.service
systemctl start kubelet.service
systemctl start kube-proxy.service
三、拉取启动镜像
安装mysql
docker pull mysql:5.7
创建文件: mysql-rc.yaml:
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"
kubectl create -f mysql-rc.yaml
查看mysql具体启动情况:
kubectl describe pod mysql
下载安装证书:
wget [http://mirror.centos.org/centos/7/os/x86\_64/Packages/python-rhsm-certificates-1.19.10-1.el7\_4.x86\_64.rpm](http://mirror.centos.org/centos/7/os/x86_64/Packages/python-rhsm-certificates-1.19.10-1.el7_4.x86_64.rpm)
rpm2cpio python-rhsm-certificates-1.19.10-1.el7\_4.x86\_64.rpm | cpio -iv --to-stdout ./etc/rhsm/ca/redhat-uep.pem | tee /etc/rhsm/ca/redhat-uep.pem
#rpm2cpio命令用于将rpm软件包转换为cpio格式的文件,cpio命令主要是用来建立或者还原备份档的工具程序,cpio命令可以复制文件到归档包中,或者从归档包中复制文件。
删除并重新生成mysql的rc:
kubectl delete -f mysql-rc.yaml
kubectl get pods
kubectl create -f mysql-rc.yaml
kubectl describe pod mysql
kubectl get pods
创建文件:mysql-svc.yaml:
apiVersion: v1
kind: Service
metadata:
name: mysql
spec:
ports:
- port: 3306
selector:
app: mysql
kubectl create -f mysql-svc.yaml
拉取并运行tomcat的demo镜像:
docker pull kubeguide/tomcat-app:v1
创建文件:myweb-rc.yaml:
apiVersion: v1
kind: ReplicationController
metadata:
name: myweb
spec:
replicas: 5
selector:
app: myweb
template:
metadata:
labels:
app: myweb
spec:
containers:
- name: myweb
image: docker.io/kubeguide/tomcat-app:v1
ports:
- containerPort: 8080
env:
- name: MYSQL_SERVICE_HOST
value: "10.254.65.209" #<===这里的mysql地址需要填写service的mysql地址,执行kubectl get svc 查看
- name: MYSQL_SERVICE_PORT
value: "3306"
创建文件:myweb-svc.yaml:
apiVersion: v1
kind: Service
metadata:
name: myweb
spec:
type: NodePort
ports:
- port: 8080
nodePort: 30001 #外部端口映射
selector:
app: myweb
kubectl create -f myweb-rc.yaml
kubectl create -f myweb-svc.yaml
四、外部访问与查看数据
访问:http://127.0.0.1:30001/demo/
K8S: (一)CentOS 单机部署