如何解决当1个主节点关闭时，使用kubeadm和nginx LB的Kubernetes HA群集无法正常工作-服务器错误：etcdserver：请求超时
我已经使用Kubeadm建立了Kubernetes HA集群（堆叠的ETCD）。当我故意关闭一个主节点时，整个集群都关闭了，并且出现错误：
[vagrant@k8s-master01 ~]$ kubectl get nodes
Error from server: etcdserver: request timed out
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
k8s-master01 Ready master 27d v1.19.2 192.168.30.5 <none> CentOS Linux 7 (Core) 3.10.0-1127.19.1.el7.x86_64 docker://19.3.11
k8s-master02 Ready master 27d v1.19.2 192.168.30.6 <none> CentOS Linux 7 (Core) 3.10.0-1127.19.1.el7.x86_64 docker://19.3.11
k8s-worker01 Ready <none> 27d v1.19.2 192.168.30.10 <none> CentOS Linux 7 (Core) 3.10.0-1127.19.1.el7.x86_64 docker://19.3.11
k8s-worker02 Ready <none> 27d v1.19.2 192.168.30.11 <none> CentOS Linux 7 (Core) 3.10.0-1127.19.1.el7.x86_64 docker://19.3.11
[vagrant@k8s-master01 ~]$ kubectl get pods -n kube-system
NAME READY STATUS RESTARTS AGE
coredns-f9fd979d6-wkknl 0/1 Running 9 27d
coredns-f9fd979d6-wp854 1/1 Running 8 27d
etcd-k8s-master01 1/1 Running 46 27d
etcd-k8s-master02 1/1 Running 10 27d
kube-apiserver-k8s-master01 1/1 Running 60 27d
kube-apiserver-k8s-master02 1/1 Running 13 27d
kube-controller-manager-k8s-master01 1/1 Running 20 27d
kube-controller-manager-k8s-master02 1/1 Running 15 27d
kube-proxy-7vn9l 1/1 Running 7 26d
kube-proxy-9kjrj 1/1 Running 7 26d
kube-proxy-lbmkz 1/1 Running 8 27d
kube-proxy-ndbp5 1/1 Running 9 27d
kube-scheduler-k8s-master01 1/1 Running 20 27d
kube-scheduler-k8s-master02 1/1 Running 15 27d
weave-net-77ck8 2/2 Running 21 26d
weave-net-bmpsf 2/2 Running 24 27d
weave-net-frchk 2/2 Running 27 27d
weave-net-zqjzf 2/2 Running 22 26d
[vagrant@k8s-master01 ~]$
Nginx配置：
stream {
upstream apiserver_read {
server 192.168.30.5:6443;
server 192.168.30.6:6443;
}
server {
listen 6443;
proxy_pass apiserver_read;
}
}
Nginx日志：
2020/10/19 09:12:01 [error] 1215#0: *12460 no live upstreams while connecting to upstream,client: 192.168.30.11,server: 0.0.0.0:6443,upstream: "apiserver_read",bytes from/to client:0/0,bytes from/to upstream:0/0
2020/10/19
2020/10/19 09:12:01 [error] 1215#0: *12465 no live upstreams while connecting to upstream,client: 192.168.30.5,bytes from/to upstream:0/0
2020/10/19 09:12:02 [error] 1215#0: *12466 no live upstreams while connecting to upstream,client: 192.168.30.10,bytes from/to upstream:0/0
2020/10/19 09:12:02 [error] 1215#0: *12467 no live upstreams while connecting to upstream,bytes from/to upstream:0/0
2020/10/19 09:12:02 [error] 1215#0: *12468 no live upstreams while connecting to upstream,bytes from/to upstream:0/0
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