k8s -hpa

hpa定义弹性自动伸缩

1、横向伸缩，当定义的cpu、mem指标达到hpa值时，会触发pods伸展

2、安装metrics-server  收集pods的cpu。mem信息供hpa参照

     安装helm

     curl -fsSl -o get_helm.sh https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3

用helm安装metrics-server

helm repo add metrics-server https://kubernetes-sigs.github.io/metrics-server/
 helm repo update
 helm install metrics-server metrics-server/metrics-server   --namespace kube-system   --set args="{--kubelet-insecure-tls,--requestheader-allowed-names=,--requestheader-extra-headers-prefix=X-Remote-Extra-,-requestheader-group-headers=X-Remote-Group,--requestheader-username-headers=X-Remote-User,--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname}"   --set serviceAccount.create=true   --set serviceAccount.name=metrics-server

过程中发现pods未启动

kubectl describe pods metrics-server-7f8c89bbd6-m2g5n -n kube-system  发现镜像拉不下来。估计是网络的原因。