重新安装的节点无法加入 Kubernetes 集群

Question

我使用 kubeadm 安装了一个工作的 3 节点 k8s 集群（Ubuntu 20.04 裸机上的 v1.21.0）。我删除了其中一个节点并从头开始重新安装它（擦除磁盘，新 OS 但 IP 地址相同）。现在无法加入集群：

# kubeadm join k8s.example.com:6443 --token who21h.jolq7z79twv7bf4m \
--discovery-token-ca-cert-hash sha256:f63c5786cea2be46c999f4b5c595abd0aa24896c3b37616c347df318d7406c00 \
--control-plane
...
[check-etcd] Checking that the etcd cluster is healthy
error execution phase check-etcd: etcd cluster is not healthy: failed to dial endpoint https://65.21.128.36:2379 with maintenance client: context deadline exceeded
To see the stack trace of this error execute with --v=5 or higher

我运行与 --v=5 相同（在 kubeadm reset 之后），它卡住了记录这些：

Failed to get etcd status for https://123.123.123.123:2379: failed to dial endpoint https://123.123.123.123:2379 with maintenance client: context deadline exceeded

123.123.123.123 是我尝试 return 到集群的节点的 IP 地址。

运行 kubectl get nodes 在其他一位大师上只列出了剩下的 2 位大师。我正确删除了有问题的节点：

kubectl get nodes
kubectl drain <node-name>
kubectl drain <node-name> --ignore-daemonsets --delete-local-data
kubectl delete node <node-name>

有什么想法吗？发送.

Answer 1

仔细查看您收到的错误消息：

Failed to get etcd status for https://123.123.123.123:2379: failed to dial endpoint https://123.123.123.123:2379 with maintenance client: context deadline exceeded

这是一个很常见的问题，与 etcd 集群相关，有详细记录。与以下线程进行比较：

具体而言，这与 etcd 法定人数的损失有关。您可以按照here.

中的描述进行检查

解决方法一步步描述in this comment:

For the record here the command to run on one of the remaining etcd pod :

Find the id of the member to remove

ETCDCTL_API=3 etcdctl --endpoints 127.0.0.1:2379 --cacert /etc/kubernetes/pki/etcd/ca.crt --cert
/etc/kubernetes/pki/etcd/server.crt --key
/etc/kubernetes/pki/etcd/server.key member list
5a4945140f0b39d9, started, sbg2-k8s001, https://192.168.208.12:2380, https://192.168.208.12:2379
740381e3c57ef823, started, gra3-k8s001, https://192.168.208.13:2380, https://192.168.208.13:2379
77a8fbb530b10f4a, started, rbx4-k8s001, https://192.168.208.14:2380, https://192.168.208.14:2379

I want to remove 740381e3c57ef823

ETCDCTL_API=3 etcdctl --endpoints 127.0.0.1:2379 --cacert /etc/kubernetes/pki/etcd/ca.crt --cert
/etc/kubernetes/pki/etcd/server.crt --key
/etc/kubernetes/pki/etcd/server.key member remove 740381e3c57ef823
Member 740381e3c57ef823 removed from cluster a2c90ef66bb95cc9

Checking

ETCDCTL_API=3 etcdctl --endpoints 127.0.0.1:2379 --cacert /etc/kubernetes/pki/etcd/ca.crt --cert
/etc/kubernetes/pki/etcd/server.crt --key
/etc/kubernetes/pki/etcd/server.key member list
5a4945140f0b39d9, started, sbg2-k8s001, https://192.168.208.12:2380, https://192.168.208.12:2379
77a8fbb530b10f4a, started, rbx4-k8s001, https://192.168.208.14:2380, https://192.168.208.14:2379

Now I can join my new master.

重新安装的节点无法加入 Kubernetes 集群

Re-installed node cannot join Kubernetes cluster

kubernetes

kubeadm