如何解决Kubernetes 升级计划命令失败，因为 etcd 集群无法使用维护客户端拨打端点 https://192.168.5.12:2379
我在虚拟机 VM 上使用 Kubeadm 创建了一个 Kubernetes 集群。我正在尝试从 v1.18.0 升级到 v1.20.5。但我只是为了获得升级计划而遇到问题。该问题与 etcd 有关。解释如下。
集群：
- 2 个主节点
- 2 个子节点
- 两个主节点中的 2 个 ETCD 成员
- 1 个负载均衡器
ETCD成员名单 集群运行状况良好。
| ID | STATUS | NAME | 对等地址 | 客户地址 |
|---|---|---|---|---|
| 71e6a7dee81f2d25 | 开始 | master-2 | https://192.168.5.12:2380 | https://192.168.5.12:2379 |
| c0f09c2e98e39311 | 开始 | master-1 | https://192.168.5.11:2380 | https://192.168.5.11:2379 |
节点
| 姓名 | STATUS | 角色 | 年龄 | 版本 | INTERNAL-IP |
|---|---|---|---|---|---|
| master-1 | 准备好 | master | 10h | v1.18.0 | 192.168.5.11 |
| master-2 | 准备好 | master | 10h | v1.18.0 | 192.168.5.12 |
| worker-1 | 准备好 | 10h | v1.18.0 | 192.168.5.21 | |
| worker-2 | 准备好 | 10h | v1.18.0 | 192.168.5.22 |
问题
当我尝试使用 'kubeadm upgrade plan' 获取升级计划时，出现以下错误。
**Command**
kubeadm upgrade plan
**I0405 08:35:19.395064 8137 etcd.go:512] Failed to get etcd status for https://192.168.5.12:2379: Failed to dial endpoint https://192.168.5.12:2379 with maintenance client: context deadline exceeded**
正在检查连接 Master-1
Connection to 192.168.5.11 2379 port [tcp/*] succeeded!
Connection to 192.168.5.12 2379 port [tcp/*] succeeded!
Master-2
Connection to 192.168.5.11 2379 port [tcp/*] succeeded!
Connection to 192.168.5.12 2379 port [tcp/*] succeeded!
ETCD Member 1 主节点定义：192.168.5.11
apiVersion: v1
kind: Pod
Metadata:
annotations:
kubeadm.kubernetes.io/etcd.advertise-client-urls: https://192.168.5.11:2379
creationTimestamp: null
labels:
component: etcd
tier: control-plane
name: etcd
namespace: kube-system
spec:
containers:
- command:
- etcd
- --advertise-client-urls=https://192.168.5.11:2379
- --cert-file=/etc/kubernetes/pki/etcd/server.crt
- --client-cert-auth=true
- --data-dir=/var/lib/etcd
- --initial-advertise-peer-urls=https://192.168.5.11:2380
- --initial-cluster=master-1=https://192.168.5.11:2380,master-2=https://192.168.5.12:2380
- --key-file=/etc/kubernetes/pki/etcd/server.key
- --listen-client-urls=https://127.0.0.1:2379,https://192.168.5.11:2379
- --listen-metrics-urls=http://127.0.0.1:2381
- --listen-peer-urls=https://192.168.5.11:2380
- --name=master-1
- --peer-cert-file=/etc/kubernetes/pki/etcd/peer.crt
- --peer-client-cert-auth=true
- --peer-key-file=/etc/kubernetes/pki/etcd/peer.key
- --peer-trusted-ca-file=/etc/kubernetes/pki/etcd/ca.crt
- --snapshot-count=10000
- --trusted-ca-file=/etc/kubernetes/pki/etcd/ca.crt
image: k8s.gcr.io/etcd:3.4.3-0
ETCD Member 2 主节点定义：192.168.5.12
apiVersion: v1
kind: Pod
Metadata:
annotations:
kubeadm.kubernetes.io/etcd.advertise-client-urls: https://192.168.5.12:2379
creationTimestamp: null
labels:
component: etcd
tier: control-plane
name: etcd
namespace: kube-system
spec:
containers:
- command:
- etcd
- --advertise-client-urls=https://192.168.5.12:2379
- --cert-file=/etc/kubernetes/pki/etcd/server.crt
- --client-cert-auth=true
- --data-dir=/var/lib/etcd
- --initial-advertise-peer-urls=https://192.168.5.12:2380
- --initial-cluster=master-2=https://192.168.5.12:2380,master-1=https://192.168.5.11:2380
- --initial-cluster-state=existing
- --key-file=/etc/kubernetes/pki/etcd/server.key
- --listen-client-urls=https://127.0.0.1:2379,https://192.168.5.12:2379
- --listen-metrics-urls=http://127.0.0.1:2381
- --listen-peer-urls=https://192.168.5.12:2380
- --name=master-2
- --peer-cert-file=/etc/kubernetes/pki/etcd/peer.crt
- --peer-client-cert-auth=true
- --peer-key-file=/etc/kubernetes/pki/etcd/peer.key
- --peer-trusted-ca-file=/etc/kubernetes/pki/etcd/ca.crt
- --snapshot-count=10000
- --trusted-ca-file=/etc/kubernetes/pki/etcd/ca.crt
image: k8s.gcr.io/etcd:3.4.3-0
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