通过Rancher一键部署k8s服务
sudo docker run --privileged -d --restart=unless-stopped -p 80:80 -p 443:443 rancher/rancher
- 然后访问你的docker机器的IP地址就可以看到一个叫local的k8s环境，不过不知道是不是我操作不对,我不能使用这个集群
- 点击添加集群,自定义一通默认到最后给你一个docker命令执行后我们就又得到一个自定义的k8s集群了（弄一个单节点集群的话最后一步把3个都要勾选上）
- 下载kubectl https://kubernetes.io/docs/tasks/tools/install-kubectl/
- 创建一个～/.kube/config文件，把https://k8s集群部署IP/c/local/monitoring 里面的Kubeconfig File按钮里面的文本拷贝进去OK
部署一个 nginx
nginx.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
labels:
app: nginx
spec:
selector:
matchLabels:
app: nginx
replicas: 1
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx
ports:
- containerPort: 80
运行
>kubectl apply -f nginx.yml
deployment.apps/nginx configured
>kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-deployment-7f4768c97b-69t65 1/1 Running 0 105s
//删除 deployment
kubectl delete deployment nginx-deployment
//删除 pod
kubectl.exe delete pod nginx-deployment-7f4768c97b-69t65
//查看 pod 日志
kubectl.exe logs -f nginx-deployment-7f4768c97b-69t65
现在外网还无法访问要把pod内的端口通过service给暴露出来
nginx_service.yaml
apiVersion: v1
kind: Service
metadata:
name: nginx-service
labels:
app: nginx
spec:
selector:
app: nginx
ports:
- name: nginx-port
protocol: TCP
port: 80
targetPort: 80
nodePort: 30080
type: NodePort
运行
>kubectl apply -f nginx_service.yaml
>kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.43.0.1 <none> 443/TCP 83m
nginx-service NodePort 10.43.207.110 <none> 80:30080/TCP 29m
访问 http://k8s集群部署IP:30080 就可以看到熟悉的 nginx 欢迎界面了
在k8s中部署 golang 服务
代码
package main
import "net/http"
func main() {
http.HandleFunc("/k8s", func(writer http.ResponseWriter, request *http.Request) {
_, _ = writer.Write([]byte("hello world k8s"))
})
_ = http.ListenAndServe(":8080", nil)
}
Dockerfile
FROM scratch
ADD app /var/app
WORKDIR /var
ENTRYPOINT ["/var/app"]
构建docker
//docker image build -t [username(dockerhub 用户名)]/[repository（在dockerhub新建的仓库）]:[tag（版本号）] .
docker image build -t hwholiday/app:v1 .
docker run -p 8080:8080 --name app -d hwholiday/app:v1
//访问定义好的api能正常输出就代表一切正常接下来我们把镜像传到 Dockerhub
docker push hwholiday/app:v1
在k8s运行服务
app.yml
apiVersion: apps/v1
kind: Deployment
metadata:
name: app-deployment
labels:
app: app
spec:
selector:
matchLabels:
app: app
replicas: 1
template:
metadata:
labels:
app: app
spec:
containers:
- name: app
image: hwholiday/app:v1
ports:
- containerPort: 8080
app_service.yml
apiVersion: v1
kind: Service
metadata:
name: app-service
labels:
app: app
spec:
selector:
app: app
ports:
- name: app-port
protocol: TCP
port: 8080
targetPort: 8080
nodePort: 31080
type: NodePort
运行
kubectl.exe apply -f app.yml
kubectl.exe apply -f app_service.yml