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这篇“Kubernetes的cronhpa怎么安装使用”文章的知识点大部分人都不太理解，所以小编给大家总结了以下内容，内容详细，步骤清晰，具有一定的借鉴价值，希望大家阅读完这篇文章能有所收获，下面我们一起来看看这篇“Kubernetes的cronhpa怎么安装使用”文章吧。
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cronhpa 是基于 CRD 的方式开发的 controller，使用 cronhpa 的方式非常简单，整体的使用习惯也尽可能的和 HPA 保持一致。代码仓库地址
kubectl apply -f config/crds/autoscaling_v1beta1_cronhorizontalpodautoscaler.yaml
# create ClusterRole kubectl apply -f config/rbac/rbac_role.yaml # create ClusterRolebinding and ServiceAccount kubectl apply -f config/rbac/rbac_role_binding.yaml
kubernetes-cronhpa-controllerkubectl apply -f config/deploy/deploy.yaml
kubernetes-cronhpa-controller 安装状态kubectl get deploy kubernetes-cronhpa-controller -n kube-system -o wide kubernetes-cronhpa-controller git:(master) kubectl get deploy kubernetes-cronhpa-controller -n kube-system NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE kubernetes-cronhpa-controller 1 1 1 1 49s
安装了 kubernetes-cronhpa-controller 后，我们可以通过一个简单的 demo 进行功能的验证。在部署前，我们先看下一个标准的 cronhpa 的定义。
apiVersion: autoscaling.alibabacloud.com/v1beta1 kind: CronHorizontalPodAutoscaler metadata: labels: controller-tools.k8s.io: "1.0" name: cronhpa-sample namespace: default spec: scaleTargetRef: apiVersion: apps/v1beta2 kind: Deployment name: nginx-deployment-basic jobs: - name: "scale-down" schedule: "30 */1 * * * *" targetSize: 1 - name: "scale-up" schedule: "0 */1 * * * *" targetSize: 3
其中 scaleTargetRef 字段负责描述伸缩的对象，jobs 中定义了扩展的 crontab 定时任务。在这个例子中，设定的是每分钟的第 0 秒扩容到 3 个 Pod，每分钟的第 30s 缩容到 1 个 Pod。如果执行正常，我们可以在 30s 内看到负载数目的两次变化。
kubectl apply -f examples/deployment_cronhpa.yaml
kubectl get deploy nginx-deployment-basic kubernetes-cronhpa-controller git:(master) kubectl get deploy nginx-deployment-basic NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE nginx-deployment-basic 2 2 2 2 9s
kubectl describe cronhpa cronhpa-sample
Name: cronhpa-sample
Namespace: default
Labels: controller-tools.k8s.io=1.0
Annotations: kubectl.kubernetes.io/last-applied-configuration:
{"apiVersion":"autoscaling.alibabacloud.com/v1beta1","kind":"CronHorizontalPodAutoscaler","metadata":{"annotations":{},"labels":{"controll...
API Version: autoscaling.alibabacloud.com/v1beta1
Kind: CronHorizontalPodAutoscaler
Metadata:
Creation Timestamp: 2019-04-14T10:42:38Z
Generation: 1
Resource Version: 4017247
Self Link: /apis/autoscaling.alibabacloud.com/v1beta1/namespaces/default/cronhorizontalpodautoscalers/cronhpa-sample
UID: 05e41c95-5ea2-11e9-8ce6-00163e12e274
Spec:
Jobs:
Name: scale-down
Schedule: 30 */1 * * * *
Target Size: 1
Name: scale-up
Schedule: 0 */1 * * * *
Target Size: 3
Scale Target Ref:
API Version: apps/v1beta2
Kind: Deployment
Name: nginx-deployment-basic
Status:
Conditions:
Job Id: 38e79271-9a42-4131-9acd-1f5bfab38802
Last Probe Time: 2019-04-14T10:43:02Z
Message:
Name: scale-down
Schedule: 30 */1 * * * *
State: Submitted
Job Id: a7db95b6-396a-4753-91d5-23c2e73819ac
Last Probe Time: 2019-04-14T10:43:02Z
Message:
Name: scale-up
Schedule: 0 */1 * * * *
State: Submitted
Events: kubernetes-cronhpa-controller git:(master) kubectl describe cronhpa cronhpa-sample
Name: cronhpa-sample
Namespace: default
Labels: controller-tools.k8s.io=1.0
Annotations: kubectl.kubernetes.io/last-applied-configuration:
{"apiVersion":"autoscaling.alibabacloud.com/v1beta1","kind":"CronHorizontalPodAutoscaler","metadata":{"annotations":{},"labels":{"controll...
API Version: autoscaling.alibabacloud.com/v1beta1
Kind: CronHorizontalPodAutoscaler
Metadata:
Creation Timestamp: 2019-04-15T06:41:44Z
Generation: 1
Resource Version: 15673230
Self Link: /apis/autoscaling.alibabacloud.com/v1beta1/namespaces/default/cronhorizontalpodautoscalers/cronhpa-sample
UID: 88ea51e0-5f49-11e9-bd0b-00163e30eb10
Spec:
Jobs:
Name: scale-down
Schedule: 30 */1 * * * *
Target Size: 1
Name: scale-up
Schedule: 0 */1 * * * *
Target Size: 3
Scale Target Ref:
API Version: apps/v1beta2
Kind: Deployment
Name: nginx-deployment-basic
Status:
Conditions:
Job Id: 84818af0-3293-43e8-8ba6-6fd3ad2c35a4
Last Probe Time: 2019-04-15T06:42:30Z
Message: cron hpa job scale-down executed successfully
Name: scale-down
Schedule: 30 */1 * * * *
State: Succeed
Job Id: f8579f11-b129-4e72-b35f-c0bdd32583b3
Last Probe Time: 2019-04-15T06:42:20Z
Message:
Name: scale-up
Schedule: 0 */1 * * * *
State: Submitted
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Succeed 5s cron-horizontal-pod-autoscaler cron hpa job scale-down executed successfully此时可以在 event 中发现负载的定时伸缩已经生效。
以上就是关于“Kubernetes的cronhpa怎么安装使用”这篇文章的内容，相信大家都有了一定的了解，希望小编分享的内容对大家有帮助，若想了解更多相关的知识内容，请关注创新互联行业资讯频道。