$ oc login https://master.example.com:8443 -u admin -p admin应用扩展
目的
使用部署配置来部署多个 Pod，并以此扩展缩放应用。
环境
-
openshift v3.11.16/kubernetes v1.11.0
步骤
创建工程
1. CLI 登录到 OCP
2. 创建工程
$ oc new-project lab08创建一个新应用，测试缩放
1. 创建一个应用，导出定义到 scaling.yml
# oc new-app -o yaml --name=lab08 -i php:7.0 https://github.com/redhat-china/scaling.git > scaling.yml2. 编辑 scaling.yml，DeploymentConfig 部分 replicas 设为 3
- apiVersion: apps.openshift.io/v1
kind: DeploymentConfig
metadata:
annotations:
openshift.io/generated-by: OpenShiftNewApp
creationTimestamp: null
labels:
app: lab08
name: lab08
spec:
replicas: 33. 创建应用
# oc create -f scaling.yml
imagestream.image.openshift.io/lab08 created
buildconfig.build.openshift.io/lab08 created
deploymentconfig.apps.openshift.io/lab08 created
service/lab08 created4. 查看创建的 Pod
# oc get pods
NAME READY STATUS RESTARTS AGE
lab08-1-build 0/1 Completed 0 1m
lab08-1-f654z 1/1 Running 0 32s
lab08-1-n7cgl 1/1 Running 0 32s
lab08-1-wjgqs 1/1 Running 0 32s5. 创建路由
# oc expose svc lab08 --hostname=lab08.apps.example.com6. 访问测试
# for i in {1..5}; do curl -s http://lab08.apps.example.com ; done
Server ID: 10.244.4.115
Server ID: 10.244.8.59
Server ID: 10.244.8.60
Server ID: 10.244.4.115
Server ID: 10.244.8.59扩展到更多节点
1. 查看当前 Replicas 数量
# oc describe dc lab08 | grep Replicas
Replicas: 3
Replicas: 3 current / 3 desired3. 扩展到 5 个 Pod
# oc scale --replicas=5 dc lab08
deploymentconfig.apps.openshift.io/lab08 scaled4. 查看当前运行的 Pod
# oc get pods
NAME READY STATUS RESTARTS AGE
lab08-1-build 0/1 Completed 0 11m
lab08-1-f654z 1/1 Running 0 10m
lab08-1-lxpj9 1/1 Running 0 1m
lab08-1-n7cgl 1/1 Running 0 10m
lab08-1-vdjzn 1/1 Running 0 1m
lab08-1-wjgqs 1/1 Running 0 10m5. 访问测试
# for i in {1..5}; do curl -s http://lab08.apps.example.com ; done
Server ID: 10.244.4.115
Server ID: 10.244.8.59
Server ID: 10.244.8.60
Server ID: 10.244.8.61
Server ID: 10.244.8.62