Minikube 部署时，修改 kubernetes 的组件参数
minikube 支持修改每个组件的参数，用 --extra-config 中，格式如下：
$ ./minkube-v1.3.1 start --extra-config=scheduler.leader-elect-resource-lock=configmaps --extra-config=controller-manager.leader-elect-resource-lock=configmaps
😄 minikube v1.3.1 on Darwin 10.14
💡 Tip: Use 'minikube start -p <name>' to create a new cluster, or 'minikube delete' to delete this one.
🏃 Using the running virtualbox "minikube" VM ...
⌛ Waiting for the host to be provisioned ...
🐳 Preparing Kubernetes v1.15.2 on Docker 18.09.8 ...
▪ scheduler.leader-elect-resource-lock=configmaps
▪ controller-manager.leader-elect-resource-lock=configmaps
🔄 Relaunching Kubernetes using kubeadm ...
⌛ Waiting for: apiserver proxy etcd scheduler controller dns
🏄 Done! kubectl is now configured to use "minikube"
上面参数的含义是将 scheduler 的参数 LeaderElection.ResourceLock 设置为 configmaps。
支持参数设置的组件：kubelet、apiserver、proxy、controller-manager、etcd、scheduler。