k8s_demo with minikube
- 启动
minikube start --image-mirror-country=cn
😄 minikube v1.4.0 on Darwin 10.15
⚠️ None of the known repositories in your location are accessible. Using registry.cn-hangzhou.aliyuncs.com/google_containers as fallback.
✅ Using image repository registry.cn-hangzhou.aliyuncs.com/google_containers
🔥 Creating virtualbox VM (CPUs=2, Memory=2000MB, Disk=20000MB) ...
🐳 Preparing Kubernetes v1.16.0 on Docker 18.09.9 ...
🚜 Pulling images ...
🚀 Launching Kubernetes ...
⌛ Waiting for: apiserver proxy etcd scheduler controller dns
🏄 Done! kubectl is now configured to use "minikube"- 验证
minikube status
host: Running
kubelet: Running
apiserver: Running
kubectl: Correctly Configured: pointing to minikube-vm at 192.168.99.100
- Demo
eval $(minikube docker-env)
# cd /Users/jay/code/dev/k8s/k8s_demo
➜ docker build -t k8s-demo:0.1 .
Sending build context to Docker daemon 5.632kB
Step 1/2 : FROM nginx
latest: Pulling from library/nginx
8d691f585fa8: Pull complete
5b07f4e08ad0: Pull complete
abc291867bca: Pull complete
Digest: sha256:922c815aa4df050d4df476e92daed4231f466acc8ee90e0e774951b0fd7195a4
Status: Downloaded newer image for nginx:latest
---> 540a289bab6c
Step 2/2 : COPY html/* /usr/share/nginx/html
---> 279d420cbc27
Successfully built 279d420cbc27
Successfully tagged k8s-demo:0.1
➜ k8s_demo docker images|grep demo
k8s-demo 0.1 279d420cbc27 5 seconds ago 126MB
➜ k8s_demo k get pods
No resources found.
➜ k8s_demo kubectl create -f pod.yml
pod/k8s-demo created
➜ k8s_demo k get pods
NAME READY STATUS RESTARTS AGE
k8s-demo 1/1 Running 0 4s
➜ k8s_demo kubectl describe pods | grep Labels
Labels: app=k8s-demo
➜ k8s_demo kubectl create -f svc.yml
service/k8s-demo-svc created
➜ k8s_demo k get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
k8s-demo-svc NodePort 10.108.119.235 <none> 80:30050/TCP 8s
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 6m3s
➜ k8s_demo minikube service k8s-demo-svc --url
http://192.168.99.100:30050
➜ k8s_demo curl http://192.168.99.100:30050
<h1>Hello Docker!</h1>
➜ k create -f deployment.yml
deployment.apps/k8s-demo-deployment created
➜ k8s_demo k get rs
NAME DESIRED CURRENT READY AGE
k8s-demo-deployment-7c4cf5fbbf 3 3 3 16s
- 横向扩展、滚动更新、版本回滚
# update app
echo '<h1>Hello Kubernetes!</h1>' > html/index.html
docker build -t k8s-demo:0.2 .
# 更新 deployment.yml
k apply -f deployment.yml --record=true # --record=true 让 Kubernetes 把这行命令记到发布历史中备查
Warning: kubectl apply should be used on resource created by either kubectl create --save-config or kubectl apply
deployment.apps/k8s-demo-deployment configured
# 查看日志
rollout status deployment k8s-demo-deployment
# 查看历史日志
➜ k8s_demo git:(master) ✗ k rollout history deployment k8s-demo-deployment
deployment.apps/k8s-demo-deployment
REVISION CHANGE-CAUSE
1 <none>
2 kubectl apply --filename=deployment.yml --record=true
# 回滚
k rollout undo deployment k8s-demo-deployment --to-revision=1
deployment.apps/k8s-demo-deployment rolled back
➜ k8s_demo git:(master) ✗ k get pods
NAME READY STATUS RESTARTS AGE
k8s-demo-deployment-545967bfcb-2scqh 1/1 Running 0 112s
k8s-demo-deployment-545967bfcb-ppp6v 0/1 Terminating 0 103s
k8s-demo-deployment-545967bfcb-zckhk 1/1 Running 0 112s
k8s-demo-deployment-7c4cf5fbbf-h4hc8 1/1 Running 0 3s
k8s-demo-deployment-7c4cf5fbbf-qdn27 1/1 Running 0 3s
➜ k8s_demo git:(master) ✗ k get pods
NAME READY STATUS RESTARTS AGE
k8s-demo-deployment-545967bfcb-2scqh 0/1 Terminating 0 119s
k8s-demo-deployment-7c4cf5fbbf-8zgkb 1/1 Running 0 3s
k8s-demo-deployment-7c4cf5fbbf-h4hc8 1/1 Running 0 10s
k8s-demo-deployment-7c4cf5fbbf-qdn27 1/1 Running 0 10s
➜ k8s_demo git:(master) ✗ k get pods
NAME READY STATUS RESTARTS AGE
k8s-demo-deployment-7c4cf5fbbf-8zgkb 1/1 Running 0 72s
k8s-demo-deployment-7c4cf5fbbf-h4hc8 1/1 Running 0 79s
k8s-demo-deployment-7c4cf5fbbf-qdn27 1/1 Running 0 79s
# k get all
NAME READY STATUS RESTARTS AGE
pod/k8s-demo-deployment-545967bfcb-fmrb7 1/1 Running 0 134m
pod/k8s-demo-deployment-545967bfcb-kw59g 1/1 Running 0 134m
pod/k8s-demo-deployment-545967bfcb-njhht 1/1 Running 0 134m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/k8s-demo-svc NodePort 10.97.51.154 <none> 80:30050/TCP 143m
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/k8s-demo-deployment 3/3 3 3 141m
NAME DESIRED CURRENT READY AGE
replicaset.apps/k8s-demo-deployment-545967bfcb 3 3 3 141m
replicaset.apps/k8s-demo-deployment-7c4cf5fbbf 0 0 0 138m- 访问测试
# local
curl 10.97.51.154 # OK
# remote
curl host:30050