准备Redis Master服务器Deployment配置文件
[root@k8s01 ~]# vi redis-master-deployment.yaml apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2 kind: Deployment metadata: name: redis-master labels: app: redis spec: selector: matchLabels: app: redis role: master tier: backend replicas: 1 template: metadata: labels: app: redis role: master tier: backend spec: containers: - name: master image: k8s.gcr.io/redis:e2e # or just image: redis resources: requests: cpu: 100m memory: 100Mi ports: - containerPort: 6379
准备Redis Master服务器Service配置文件
[root@k8s01 ~]# vi redis-master-service.yaml apiVersion: v1 kind: Service metadata: name: redis-master labels: app: redis role: master tier: backend spec: ports: - port: 6379 targetPort: 6379 selector: app: redis role: master tier: backend
准备Redis Slave服务器Deployment配置文件
[root@k8s01 ~]# vi redis-slave-deployment.yaml apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2 kind: Deployment metadata: name: redis-slave labels: app: redis spec: selector: matchLabels: app: redis role: slave tier: backend replicas: 2 template: metadata: labels: app: redis role: slave tier: backend spec: containers: - name: slave image: gcr.io/google_samples/gb-redisslave:v3 resources: requests: cpu: 100m memory: 100Mi env: - name: GET_HOSTS_FROM value: dns # Using `GET_HOSTS_FROM=dns` requires your cluster to # provide a dns service. As of Kubernetes 1.3, DNS is a built-in # service launched automatically. However, if the cluster you are using # does not have a built-in DNS service, you can instead # access an environment variable to find the master # service's host. To do so, comment out the 'value: dns' line above, and # uncomment the line below: # value: env ports: - containerPort: 6379
准备Redis Slave服务器Service配置文件
[root@k8s01 ~]# vi redis-slave-service.yaml apiVersion: v1 kind: Service metadata: name: redis-slave labels: app: redis role: slave tier: backend spec: ports: - port: 6379 selector: app: redis role: slave tier: backend
准备Guestbook前端Deployment配置文件
[root@k8s01 ~]# vi frontend-deployment.yaml apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2 kind: Deployment metadata: name: frontend labels: app: guestbook spec: selector: matchLabels: app: guestbook tier: frontend replicas: 3 template: metadata: labels: app: guestbook tier: frontend spec: containers: - name: php-redis image: gcr.io/google-samples/gb-frontend:v4 resources: requests: cpu: 100m memory: 100Mi env: - name: GET_HOSTS_FROM value: dns # Using `GET_HOSTS_FROM=dns` requires your cluster to # provide a dns service. As of Kubernetes 1.3, DNS is a built-in # service launched automatically. However, if the cluster you are using # does not have a built-in DNS service, you can instead # access an environment variable to find the master # service's host. To do so, comment out the 'value: dns' line above, and # uncomment the line below: # value: env ports: - containerPort: 80
准备Guestbook前端Service配置文件
[root@k8s01 ~]# vi frontend-service.yaml apiVersion: v1 kind: Service metadata: name: frontend labels: app: guestbook tier: frontend spec: # comment or delete the following line if you want to use a LoadBalancer type: NodePort # if your cluster supports it, uncomment the following to automatically create # an external load-balanced IP for the frontend service. # type: LoadBalancer ports: - port: 80 selector: app: guestbook tier: frontend
应用Redis master服务器Deployment配置文件
[root@k8s01 ~]# kubectl apply -f redis-master-deployment.yaml deployment.apps/redis-master created [root@k8s01 ~]# [root@k8s01 ~]# kubectl get deployments NAME READY UP-TO-DATE AVAILABLE AGE redis-master 1/1 1 1 20s [root@k8s01 ~]# [root@k8s01 ~]# kubectl get pods NAME READY STATUS RESTARTS AGE redis-master-6b54579d85-kkbjt 1/1 Running 0 27s [root@k8s01 ~]# [root@k8s01 ~]# kubectl get services NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 20h [root@k8s01 ~]#
查看Pod日志输出
[root@k8s01 ~]# kubectl logs -f redis-master-6b54579d85-kkbjt _._ _.-``__ ''-._ _.-`` `. `_. ''-._ Redis 2.8.19 (00000000/0) 64 bit .-`` .-```. ```\/ _.,_ ''-._ ( ' , .-` | `, ) Running in stand alone mode |`-._`-...-` __...-.``-._|'` _.-'| Port: 6379 | `-._ `._ / _.-' | PID: 1 `-._ `-._ `-./ _.-' _.-' |`-._`-._ `-.__.-' _.-'_.-'| | `-._`-._ _.-'_.-' | http://redis.io `-._ `-._`-.__.-'_.-' _.-' |`-._`-._ `-.__.-' _.-'_.-'| | `-._`-._ _.-'_.-' | `-._ `-._`-.__.-'_.-' _.-' `-._ `-.__.-' _.-' `-._ _.-' `-.__.-' [1] 21 Apr 06:35:24.921 # Server started, Redis version 2.8.19 [1] 21 Apr 06:35:24.922 # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled. [1] 21 Apr 06:35:24.922 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128. [1] 21 Apr 06:35:24.922 * The server is now ready to accept connections on port 6379
应用Redis master服务器Service配置文件
[root@k8s01 ~]# kubectl apply -f redis-master-service.yaml service/redis-master created [root@k8s01 ~]# [root@k8s01 ~]# kubectl get pods NAME READY STATUS RESTARTS AGE redis-master-6b54579d85-kkbjt 1/1 Running 0 5m59s [root@k8s01 ~]# [root@k8s01 ~]# kubectl get deployments NAME READY UP-TO-DATE AVAILABLE AGE redis-master 1/1 1 1 6m11s [root@k8s01 ~]# [root@k8s01 ~]# kubectl get services NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 20h redis-master ClusterIP 10.103.128.16 <none> 6379/TCP 31s [root@k8s01 ~]#
应用Redis slave服务器Deployment配置文件
[root@k8s01 ~]# kubectl apply -f redis-slave-deployment.yaml deployment.apps/redis-slave created [root@k8s01 ~]# [root@k8s01 ~]# kubectl get pods NAME READY STATUS RESTARTS AGE redis-master-6b54579d85-kkbjt 1/1 Running 0 8m4s redis-slave-799788557c-8vxqf 1/1 Running 0 12s redis-slave-799788557c-rq74t 1/1 Running 0 12s [root@k8s01 ~]# [root@k8s01 ~]# kubectl get deployments NAME READY UP-TO-DATE AVAILABLE AGE redis-master 1/1 1 1 8m12s redis-slave 2/2 2 2 20s [root@k8s01 ~]# [root@k8s01 ~]# kubectl get services NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 20h redis-master ClusterIP 10.103.128.16 <none> 6379/TCP 2m40s [root@k8s01 ~]#
应用Redis slave服务器service配置文件
[root@k8s01 ~]# kubectl apply -f redis-slave-service.yaml service/redis-slave created [root@k8s01 ~]# [root@k8s01 ~]# kubectl get pods NAME READY STATUS RESTARTS AGE redis-master-6b54579d85-kkbjt 1/1 Running 0 9m6s redis-slave-799788557c-8vxqf 1/1 Running 0 74s redis-slave-799788557c-rq74t 1/1 Running 0 74s [root@k8s01 ~]# [root@k8s01 ~]# kubectl get deployments NAME READY UP-TO-DATE AVAILABLE AGE redis-master 1/1 1 1 9m15s redis-slave 2/2 2 2 83s [root@k8s01 ~]# [root@k8s01 ~]# kubectl get services NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 20h redis-master ClusterIP 10.103.128.16 <none> 6379/TCP 3m37s redis-slave ClusterIP 10.96.236.63 <none> 6379/TCP 25s [root@k8s01 ~]#
应用Guestbook前端Deployment配置文件
[root@k8s01 ~]# kubectl apply -f frontend-deployment.yaml deployment.apps/frontend created [root@k8s01 ~]# [root@k8s01 ~]# kubectl get pods -l app=guestbook -l tier=frontend NAME READY STATUS RESTARTS AGE frontend-56fc5b6b47-5sgpf 1/1 Running 0 17s frontend-56fc5b6b47-hb87m 1/1 Running 0 17s frontend-56fc5b6b47-rs6jl 1/1 Running 0 17s [root@k8s01 ~]#
应用Guestbook前端Service配置文件
[root@k8s01 ~]# kubectl apply -f frontend-service.yaml service/frontend created [root@k8s01 ~]# [root@k8s01 ~]# kubectl get services NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE frontend NodePort 10.96.130.115 <none> 80:31802/TCP 7s kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 20h redis-master ClusterIP 10.103.128.16 <none> 6379/TCP 9m redis-slave ClusterIP 10.96.236.63 <none> 6379/TCP 5m48s [root@k8s01 ~]#
查看
[root@k8s01 ~]# kubectl get service frontend NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE frontend NodePort 10.96.130.115 <none> 80:31802/TCP 90s [root@k8s01 ~]#
浏览器访问
服务伸缩
扩容
[root@k8s01 ~]# kubectl scale deployment frontend --replicas=5 deployment.apps/frontend scaled [root@k8s01 ~]# kubectl get pods NAME READY STATUS RESTARTS AGE frontend-56fc5b6b47-5sgpf 1/1 Running 0 8m38s frontend-56fc5b6b47-f4pt6 1/1 Running 0 11s frontend-56fc5b6b47-hb87m 1/1 Running 0 8m38s frontend-56fc5b6b47-hj59m 1/1 Running 0 11s frontend-56fc5b6b47-rs6jl 1/1 Running 0 8m38s redis-master-6b54579d85-kkbjt 1/1 Running 0 22m redis-slave-799788557c-8vxqf 1/1 Running 0 14m redis-slave-799788557c-rq74t 1/1 Running 0 14m [root@k8s01 ~]#
缩容
[root@k8s01 ~]# kubectl scale deployment frontend --replicas=2 deployment.apps/frontend scaled [root@k8s01 ~]# kubectl get pods NAME READY STATUS RESTARTS AGE frontend-56fc5b6b47-hb87m 1/1 Running 0 9m28s frontend-56fc5b6b47-hj59m 1/1 Running 0 61s redis-master-6b54579d85-kkbjt 1/1 Running 0 22m redis-slave-799788557c-8vxqf 1/1 Running 0 15m redis-slave-799788557c-rq74t 1/1 Running 0 15m [root@k8s01 ~]#
清除Deployment配置Service配置和运行中的Pod容器
[root@k8s01 ~]# kubectl delete deployment -l app=redis deployment.apps "redis-master" deleted deployment.apps "redis-slave" deleted [root@k8s01 ~]# kubectl delete service -l app=redis service "redis-master" deleted service "redis-slave" deleted [root@k8s01 ~]# kubectl delete deployment -l app=guestbook deployment.apps "frontend" deleted [root@k8s01 ~]# kubectl delete service -l app=guestbook service "frontend" deleted [root@k8s01 ~]#