为特定namespace的所有pod预设环境（环境变量，挂载目录...）
例如：
kind: PodPreset apiVersion: settings.k8s.io/v1alpha1 metadata: name: default-zoneinfo namespace: default spec: selector: matchLabels: role: frontend env: - name: TZ value: Asia/Shanghai volumeMounts: - mountPath: /etc/localtime name: zoneinfo volumes: - name: zoneinfo hostPath: path: /usr/share/zoneinfo/Asia/Shanghai
配置/etc/kubectl/manifests/kube-apiserver.yaml，支持podpreset
---enable-admission-plugins=NodeRestriction,PodPreset
---service-node-port-range=1-65535
---runtime-config=http://settings.k8s.io/v1alpha1=true
参考文档
