容器基础(十): 使用kubernetes部署应用

1. 配置一个server-rc.yml, 用于创建server端，全局只配置一个replicas;2. 配置一个server-svc.yml, 与server-rc.yml进行关联, 为server端分配VIP;3. 配置一个worker-rc.yml, 用于创建客户端, 可配置多个replicas, 用于和server进行通信;

 1 ? ?k8s ?cat server-rc.yml ?2 apiVersion: v1 3 kind: ReplicationController 4 metadata: 5 ??name: server 6 spec: 7 ??replicas: 1 8 ??selector: 9 ????app: server10 ??template:11 ????metadata:12 ??????labels:13 ????????app: server14 ????spec:15 ??????containers:16 ????????- name: server17 ??????????image: env/server:v0.118 ??????????ports:19 ??????????- containerPort: 300020 ??????????env:21 ??????????- name: APP_PORT22 ????????????value: "3000"23 ? ?k8s ?

 1 ? ?k8s ?cat server-svc.yml ?2 apiVersion: v1 3 kind: Service 4 metadata: 5 ??name: server 6 spec: 7 ??ports: 8 ????- port: 3000 9 ??selector:10 ????app: server11 ? ?k8s ?

 1 ? ?k8s ?cat worker-rc.yml ?2 apiVersion: v1 3 kind: ReplicationController 4 metadata: 5 ??name: worker 6 spec: 7 ??replicas: 2 8 ??selector: 9 ????app: worker10 ??template:11 ????metadata:12 ??????labels:13 ????????app: worker14 ????spec:15 ??????containers:16 ????????- name: worker17 ??????????image: env/worker:v0.118 ??????????ports:19 ??????????- containerPort: 300020 ??????????env:21 ??????????- name: APP_DOMAIN22 ????????????value: "server" ??# 传入service名字，后续脚本通过该名字从k8s获取到VIP23 ??????????- name: APP_PORT24 ????????????value: "3000"25 ? ?k8s ?

 1 # create server-rc 2 ? ?k8s ?kubectl create -f server-rc.yml 3 replicationcontroller/server created 4 ? ?k8s ?kubectl get rc 5 NAME ????DESIRED ??CURRENT ??READY ??AGE 6 server ??1 ????????1 ????????1 ??????15s 7 ?8 # create service 9 ? ?k8s ?kubectl create -f server-svc.yml10 service/server created11 ? ?k8s ?12 ? ?~ ?kubectl get svc13 NAME ????????TYPE ???????CLUSTER-IP ?????EXTERNAL-IP ??PORT(S) ???AGE14 kubernetes ??ClusterIP ??10.96.0.1 ??????<none> ???????443/TCP ???24h15 server ??????ClusterIP ??10.103.92.121 ??<none> ???????3000/TCP ??38s16 ? ?~ ?17 18 # create worker-rc19 ? ?k8s ?kubectl create -f worker-rc.yml 20 replicationcontroller/worker created21 ? ?k8s ?kubectl get rc22 NAME ????DESIRED ??CURRENT ??READY ??AGE23 server ??1 ????????1 ????????1 ??????14m24 worker ??2 ????????2 ????????2 ??????10s25 ? ?k8s ?kubectl get pods26 NAME ??????????READY ??STATUS ???RESTARTS ??AGE27 server-x67sw ??1/1 ????Running ??0 ?????????14m28 worker-45qjt ??1/1 ????Running ??0 ?????????15s29 worker-gvwlt ??1/1 ????Running ??0 ?????????15s30 ? ?k8s ?

 1 ? ?k8s docker ps | grep python | awk ‘{print $1, $3 $4}‘ 2 7b96a767637c "pythonworker.py" 3 fb45f45be871 "pythonworker.py" 4 e217df0ca52d "pythonserver.py" 5 ? ?k8s docker exec -it e217df0ca52d /bin/bash 6 root@server-x67sw:/env/server# ps -ef 7 UID ???????PID ?PPID ?C STIME TTY ?????????TIME CMD 8 root ????????1 ????0 ?0 15:39 ? ???????00:00:00 python server.py 9 root ????????7 ????0 ?0 15:40 pts/0 ???00:00:00 /bin/bash10 root ???????12 ????7 ?0 15:40 pts/0 ???00:00:00 ps -ef11 root@server-x67sw:/env/server# ls12 Dockerfile ?log ?server.py13 root@server-x67sw:/env/server# tail -f log/server.log 14 2018-12-06 15:39:56 [INFO] ?Waiting for connection...15 2018-12-06 15:54:06 [INFO] ?(‘10.32.0.9‘, 51266) connected16 2018-12-06 15:54:06 [INFO] ?(‘10.32.0.10‘, 47969) connected17 ^C18 root@server-x67sw:/env/server# exit19 exit20 ? ?k8s docker exec -it 7b96a767637c /bin/bash21 root@worker-gvwlt:/env/worker# ps -ef22 UID ???????PID ?PPID ?C STIME TTY ?????????TIME CMD23 root ????????1 ????0 ?0 15:54 ? ???????00:00:00 python worker.py24 root ????????6 ????0 ?0 15:57 pts/0 ???00:00:00 /bin/bash25 root ???????11 ????6 ?0 15:57 pts/0 ???00:00:00 ps -ef26 root@worker-gvwlt:/env/worker# tail -f log/worker.log 27 2018-12-06 15:56:31 [INFO] ?[recv] hello, docker!28 ^C29 root@worker-gvwlt:/env/worker# exit30 exit31 ? ?k8s 

1 ? ?worker ?cat ini/config.ini | grep ip2 ip = 10.103.92.121 3 ? ?worker ?python worker.py 4 [+][recv] hello, docker!5 [+][recv] hello, docker!6 ^C7 [-] signal(2) received, exit!8 ? ?worker