问题描述
我有一个使用 kubeadm
安装的 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(擦除磁盘、新操作系统但 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
我用 kubeadm reset
运行相同的(在 --v=5
之后),但它在记录这些时卡住了:
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
是我尝试返回集群的节点的 IP 地址。
在其他 master 之一上运行 kubectl get nodes
只会列出剩余的 2 个 master。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。
解决方法
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:
- Control plain won't join #81071
- kubeadm join is not fault tolerant to etcd endpoint failures #1432
- etcd becomes unhealthy after I delete one of master node,I am look for a fix
- Restoring etcd quorum
具体来说,这与 etcd
法定人数的损失有关。您可以按照here所述进行检查。
分步说明解决方案in this comment:
这里的记录是在剩余的 etcd 之一上运行的命令 豆荚:
找到要移除的成员的id
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,gra3-k8s001,https://192.168.208.13:2380,https://192.168.208.13:2379
77a8fbb530b10f4a,rbx4-k8s001,https://192.168.208.14:2380,https://192.168.208.14:2379
我想删除 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
检查
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,https://192.168.208.12:2379
77a8fbb530b10f4a,https://192.168.208.14:2379
现在我可以加入我的新主人了。