当1个主节点关闭时，使用kubeadm和nginx LB的Kubernetes HA群集不工作--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ETCD）。当我故意关闭一个主节点时，整个集群将关闭，我得到的错误如下：

[vagrant@k8s-master01 ~]$ kubectl get nodes
Error from server: etcdserver: request timed out

我使用Nginx作为LB来平衡Kubeapi

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

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, server: 0.0.0.0:6443, upstream: "apiserver_read", bytes from/to client:0/0, 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, server: 0.0.0.0:6443, upstream: "apiserver_read", bytes from/to client:0/0, bytes from/to upstream:0/0
2020/10/19 09:12:02 [error] 1215#0: *12467 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 09:12:02 [error] 1215#0: *12468 no live upstreams while connecting to upstream, client: 192.168.30.5, server: 0.0.0.0:6443, upstream: "apiserver_read", bytes from/to client:0/0, bytes from/to upstream:0/0

---

您是否尝试从nginx机器连接到

192.168.30.5:6443

和

192.168.30.6:6443

？@zerkms当192.168.30.6启动时，我可以连接，当我关闭192.168.30.6时，两台机器都在监听6443。另一台主机不再监听192.168.30.5您的群集资源使用情况如何关闭主节点（CPU、内存、磁盘）？“另一个主节点不再侦听192.168.30.5”-您如何检查它<代码>ss？

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, server: 0.0.0.0:6443, upstream: "apiserver_read", bytes from/to client:0/0, 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, server: 0.0.0.0:6443, upstream: "apiserver_read", bytes from/to client:0/0, bytes from/to upstream:0/0
2020/10/19 09:12:02 [error] 1215#0: *12467 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 09:12:02 [error] 1215#0: *12468 no live upstreams while connecting to upstream, client: 192.168.30.5, server: 0.0.0.0:6443, upstream: "apiserver_read", bytes from/to client:0/0, bytes from/to upstream:0/0