Use minikube and dashboard installation kubernetes

minikube kubernetes can run a single local cluster nodes, it can very easily deploy kubernetes locally. Although only support single-node cluster kubernetes, but can support many kubernetes features, including:

1. DNS

2. NodePorts

3. ConfigMaps and Secrets

4. Dashboards

5. Container Runtime: Docker, CRI-O, and containerd

6. Enabling CNI (Container Network Interface)

7. Ingress

8. Install

Not yet installed minikube, you can read my previous article "centos install kubectl and minikube tool."

In this paper, install rabbitmq example, the use minikube to deploy a node kubernete

1. Start the Start command minikube, an article on the use of

minikube start --image-repository='registry.cn-hangzhou.aliyuncs.com/google_containers' --vm-driver=none

2. The following deployment kubernete using existing image rabbitmq

kubectl create deployment rabbitmq-minikube --image=docker.io/rabbitmq:3.8.2-management

Note: In order to facilitate the management, the proposed order last specify the version number, if not specified, the default is the latest

status = running description of the service has been up

3. rabbitmq expose a service port

kubectl expose deployment rabbitmq-minikube --type=NodePort --port=15672

4. Check the service of external exposure url details

minikube service rabbitmq-minikube --url

This address is our access rabbitmq address, enter the address in the browser, enter rabbitmq page,

5. open Dashboard 

minikube dashboard

Tips are as follows:

1) Enter the failure in the browser, as shown below:

http://127.0.0.1:43584/api/v1/namespaces/kubernetes-dashboard/services/http:kubernetes-dashboard:/proxy/

View all pod, found no Dashboard

kubectl get pods --namespace kube-system

2) Create a Dashboard node, the method according to the official:

kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v1.10.1/src/deploy/recommended/kubernetes-dashboard.yaml

3) Go to state pod ImagePullBackOff, mirrored pull failure. Ali cloud pull only from the mirror, the following command:

docker pull  mirrorgooglecontainers/kubernetes-dashboard-amd64:v1.10.1docker tag mirrorgooglecontainers/kubernetes-dashboard-amd64:v1.10.1 k8s.gcr.io/kubernetes-dashboard-amd64:v1.10.1

After the above command is successful, then execute 2) commands. View pod status:

kubectl get pods --all-namespaces

View pod log:

kubectl logs -f pods/kubernetes-dashboard-7c54d59f66-7tswd -n kube-system

Refer to some of the information online, this error is kube dns repeatedly restart, restart the ip rule, the following command:

systemctl stop kubeletsystemctl stop dockeriptables --flushiptables -tnat --flushsystemctl start kubeletsystemctl start docker

After re-viewing pod state, we found a successful start up.

Enter the following URL in your browser virtual machine, you can see kubernete dashboard page

http://127.0.0.1:39780/api/v1/namespaces/kubernetes-dashboard/services/http:kubernetes-dashboard:/proxy/

6. commonly used commands

#查看kubernete集群下的podkubectl get pod#查看集群下所有pod和namespace信息kubectl get pods --all-namespaces#删除一个pod -n后跟namespacekubectl delete deployment dashboard-metrics-scraper -n kubernetes-dashboard#删除servicekubectl delete services rabbitmq-minikube#停止minikube集群minikube stop#删除minikube集群minikube delete#查看service对外暴露详情minikube service rabbitmq-minikube这个命令会使用默认l浏览器打开这个地址#查看pod状态kubectl describe -n kube-system pod/kubernetes-dashboard-65c76f6c97-htfxt#查看pod启动日志kubectl logs -f pods/kubernetes-dashboard-65c76f6c97-htfxt -n kube-systemminikube logs#为rabbitmq-minikube deployment创建service，并通过Service的80端口转发至容器的8000端口上。kubectl expose deployment rabbitmq-minikube --port=80 --target-port=8000

 

Reference documents:

https://kubernetes.io/docs/setup/learning-environment/minikube/https://blog.csdn.net/shida_csdn/article/details/80028905?utm_source=blogxgwz1

Micro-channel public number