Merge pull request labring#588 from oldthreefeng/develop

use channel to manage goroutine when upgrade nodes

Merge pull request labring#578 from oldthreefeng/fix_join_node

 join node use config file

Merge pull request labring#568 from oldthreefeng/develop

clean master use --master ; clean node use --node, if not ;exit

Merge pull request labring#481 from oldthreefeng/upgrade_kubernetes_b…

…y_sealos

WIP: add upgrade kubernetes cmd

Merge pull request labring#475 from oldthreefeng/fix_contropanle

fix 1.19.1 kube-controller-manager and kube-scheduler use the LocalAP…

Merge branch 'develop'

Merge pull request labring#370 from cuisongliu/fix/delete_master

feat(develop): 修复由于kubectl出现的问题导致无法delete node

feat(develop): 修复join时候kubeadm找不到的问题

feat(develop): 修复join时候kubeadm找不到的问题

Merge pull request labring#347 from cuisongliu/fix/ca

Fix/ca

Merge branch 'develop' of https://github.com/fanux/sealos into develop