k8s更改master节点IP

知本知至2024-06-07 21:13

背景

搭建集群的同事未规划网络，导致其中有一台master ip是192.168.7.173，和其他集群节点的IP192.168.0.x或192.168.1.x相隔太远，现在需要对网络做整改，方便管理配置诸如绑定限速等操作。

master节点是3节点的。此博客属于事后记录

Note：并没有想的那么简单

思路

  1. ectd中踢出master1节点
  2. kubectl踢出master1节点
  3. 更改master1节点IP地址
    由于当前master集群前面没有haproxy、nginx等反向代理，所以集群中的一些地方配置的是master1的节点IP或master1节点IP:6443作为访问集群的入口的，坑基本上也都在这里，遇到问题解决问题
  4. master1节点执行kubeadm reset 及清理cni插件信息
  5. 更改所有的节点的hosts文件
  6. 执行kubeadm join重新将节点加入集群
  7. 验证各个组件&排障

实施

系统版本

bash 复制代码 
root@dev-k8s-master01:~# cat /etc/os-release 
NAME="Ubuntu"
VERSION="18.04.6 LTS (Bionic Beaver)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 18.04.6 LTS"
VERSION_ID="18.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=bionic
UBUNTU_CODENAME=bionic

etcd踢出master1节点

使用etcdctl命令将要更改IP的master节点踢出集群

bash 复制代码 
export ETCDCTL_API=3
# 查看集群成员信息
etcdctl --endpoints=https://192.168.7.173:2379,https://192.168.1.17:2379,https://192.168.1.38:2379 --cacert=/etc/kubernetes/pki/etcd/ca.crt   --cert=/etc/kubernetes/pki/etcd/server.crt  --key=/etc/kubernetes/pki/etcd/server.key member list --write-out=table
# 备注 使用member list 查看不到当前集群的etcd主节点
# 查看集群etcd主节点
endpoints=https://192.168.7.173:2379,https://192.168.1.17:2379,https://192.168.1.38:2379 --cacert=/etc/kubernetes/pki/etcd/ca.crt   --cert=/etc/kubernetes/pki/etcd/server.crt  --key=/etc/kubernetes/pki/etcd/server.key endpoint status --write-out=table

执行结果如下

bash 复制代码 
root@dev-k8s-master03:~# etcdctl  --endpoints=https://192.168.1.15:2379,https://192.168.1.17:2379,https://192.168.1.38:2379  --cacert=/etc/kubernetes/pki/etcd/ca.crt   --cert=/etc/kubernetes/pki/etcd/server.crt --key=/etc/kubernetes/pki/etcd/server.key member list --write-out=table
+------------------+---------+------------------+---------------------------+---------------------------+------------+
|        ID        | STATUS  |       NAME       |        PEER ADDRS         |       CLIENT ADDRS        | IS LEARNER |
+------------------+---------+------------------+---------------------------+---------------------------+------------+
| 802c824d9f96584b | started | dev-k8s-master03 | https://192.168.1.38:2380 | https://192.168.1.38:2379 |      false |
| c3e9ff62e7bd6a70 | started | dev-k8s-master01 | https://192.168.1.15:2380 | https://192.168.1.15:2379 |      false |
| ef1d4aa461844a8a | started | dev-k8s-master02 | https://192.168.1.17:2380 | https://192.168.1.17:2379 |      false |
+------------------+---------+------------------+---------------------------+---------------------------+------------+
root@dev-k8s-master03:~# etcdctl  --endpoints=https://192.168.1.15:2379,https://192.168.1.17:2379,https://192.168.1.38:2379  --cacert=/etc/kubernetes/pki/etcd/ca.crt   --cert=/etc/kubernetes/pki/etcd/server.crt --key=/etc/kubernetes/pki/etcd/server.key endpoint status --write-out=table
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
|         ENDPOINT          |        ID        | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| https://192.168.1.15:2379 | c3e9ff62e7bd6a70 |   3.5.0 |  718 MB |     false |      false |       235 |  548780443 |          548780443 |        |
| https://192.168.1.17:2379 | ef1d4aa461844a8a |   3.5.0 |  718 MB |     false |      false |       235 |  548780444 |          548780444 |        |
| https://192.168.1.38:2379 | 802c824d9f96584b |   3.5.0 |  718 MB |      true |      false |       235 |  548780444 |          548780444 |        |
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+

kubectl将master1踢出集群

bash 复制代码 
kubectl get node -o wide 
kubectl cordon k8s-master01
kubectl delete node k8s-master01

kubeadm reset

bash 复制代码 
root@dev-k8s-master01:~# kubeadm reset
[reset] Reading configuration from the cluster...
[reset] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml'
W0524 17:45:02.703143    6814 reset.go:101] [reset] Unable to fetch the kubeadm-config ConfigMap from cluster: failed to get config map: Get "https://192.168.7.173:6443/api/v1/namespaces/kube-system/configmaps/kubeadm-config?timeout=10s": dial tcp 192.168.7.173:6443: connect: no route to host
[reset] WARNING: Changes made to this host by 'kubeadm init' or 'kubeadm join' will be reverted.
[reset] Are you sure you want to proceed? [y/N]: y
[preflight] Running pre-flight checks
W0524 17:45:22.610779    6814 removeetcdmember.go:80] [reset] No kubeadm config, using etcd pod spec to get data directory
[reset] Stopping the kubelet service
[reset] Unmounting mounted directories in "/var/lib/kubelet"
[reset] Deleting contents of config directories: [/etc/kubernetes/manifests /etc/kubernetes/pki]
[reset] Deleting files: [/etc/kubernetes/admin.conf /etc/kubernetes/kubelet.conf /etc/kubernetes/bootstrap-kubelet.conf /etc/kubernetes/controller-manager.conf /etc/kubernetes/scheduler.conf]
[reset] Deleting contents of stateful directories: [/var/lib/etcd /var/lib/kubelet /var/lib/dockershim /var/run/kubernetes /var/lib/cni]

The reset process does not clean CNI configuration. To do so, you must remove /etc/cni/net.d

The reset process does not reset or clean up iptables rules or IPVS tables.
If you wish to reset iptables, you must do so manually by using the "iptables" command.

If your cluster was setup to utilize IPVS, run ipvsadm --clear (or similar)
to reset your system's IPVS tables.

The reset process does not clean your kubeconfig files and you must remove them manually.
Please, check the contents of the $HOME/.kube/config file.

清理cni插件&iptables规则

bash 复制代码 
root@dev-k8s-master01:~# mv /etc/cni/net.d /tmp/
root@dev-k8s-master01:~# iptables-save > /tmp/iptables.bak
root@dev-k8s-master01:~# iptables -F && iptables -t nat -F && iptables -t mangle -F && iptables -t raw -F && iptables -t security -F &&  iptables -X && su
# 验证
iptables -vnL

生成密钥&重新加入集群

bash 复制代码 
root@dev-k8s-master01:~# kubeadm join 192.168.1.38:6443 --token ngq4b9.vylcwrghfiayv8au --discovery-token-ca-cert-hash sha256:b4c2xxxxx2ab6cf397255ff13c179e --control-plane --certificate-key e2d52bxxxab84edd --v=5
I0524 17:57:55.749888   10646 join.go:405] [preflight] found NodeName empty; using OS hostname as NodeName
I0524 17:57:55.749934   10646 join.go:409] [preflight] found advertiseAddress empty; using default interface's IP address as advertiseAddress
I0524 17:57:55.749974   10646 initconfiguration.go:116] detected and using CRI socket: /var/run/dockershim.sock
I0524 17:57:55.750479   10646 interface.go:431] Looking for default routes with IPv4 addresses
I0524 17:57:55.750548   10646 interface.go:436] Default route transits interface "ens18"
I0524 17:57:55.750709   10646 interface.go:208] Interface ens18 is up
I0524 17:57:55.750784   10646 interface.go:256] Interface "ens18" has 2 addresses :[192.168.1.15/21 fe80::68bf:2bff:feee:6c6e/64].
I0524 17:57:55.750809   10646 interface.go:223] Checking addr  192.168.1.15/21.
I0524 17:57:55.750822   10646 interface.go:230] IP found 192.168.1.15
I0524 17:57:55.750851   10646 interface.go:262] Found valid IPv4 address 192.168.1.15 for interface "ens18".
I0524 17:57:55.750871   10646 interface.go:442] Found active IP 192.168.1.15 
[preflight] Running pre-flight checks
I0524 17:57:55.750986   10646 preflight.go:92] [preflight] Running general checks
I0524 17:57:55.751036   10646 checks.go:245] validating the existence and emptiness of directory /etc/kubernetes/manifests
I0524 17:57:55.751096   10646 checks.go:282] validating the existence of file /etc/kubernetes/kubelet.conf
I0524 17:57:55.751107   10646 checks.go:282] validating the existence of file /etc/kubernetes/bootstrap-kubelet.conf
I0524 17:57:55.751119   10646 checks.go:106] validating the container runtime
I0524 17:57:55.812507   10646 checks.go:132] validating if the "docker" service is enabled and active
I0524 17:57:55.831211   10646 checks.go:331] validating the contents of file /proc/sys/net/bridge/bridge-nf-call-iptables
I0524 17:57:55.831268   10646 checks.go:331] validating the contents of file /proc/sys/net/ipv4/ip_forward
I0524 17:57:55.831297   10646 checks.go:649] validating whether swap is enabled or not
I0524 17:57:55.831322   10646 checks.go:372] validating the presence of executable conntrack
I0524 17:57:55.831337   10646 checks.go:372] validating the presence of executable ip
I0524 17:57:55.831351   10646 checks.go:372] validating the presence of executable iptables
I0524 17:57:55.831368   10646 checks.go:372] validating the presence of executable mount
I0524 17:57:55.831382   10646 checks.go:372] validating the presence of executable nsenter
I0524 17:57:55.831392   10646 checks.go:372] validating the presence of executable ebtables
I0524 17:57:55.831403   10646 checks.go:372] validating the presence of executable ethtool
I0524 17:57:55.831419   10646 checks.go:372] validating the presence of executable socat
I0524 17:57:55.831430   10646 checks.go:372] validating the presence of executable tc
I0524 17:57:55.831442   10646 checks.go:372] validating the presence of executable touch
I0524 17:57:55.831455   10646 checks.go:520] running all checks
I0524 17:57:55.900002   10646 checks.go:403] checking whether the given node name is valid and reachable using net.LookupHost
I0524 17:57:55.900158   10646 checks.go:618] validating kubelet version
I0524 17:57:55.953966   10646 checks.go:132] validating if the "kubelet" service is enabled and active
I0524 17:57:55.970602   10646 checks.go:205] validating availability of port 10250
I0524 17:57:55.970805   10646 checks.go:432] validating if the connectivity type is via proxy or direct
I0524 17:57:55.970857   10646 join.go:475] [preflight] Discovering cluster-info
I0524 17:57:55.970891   10646 token.go:80] [discovery] Created cluster-info discovery client, requesting info from "192.168.1.38:6443"
I0524 17:57:55.978324   10646 token.go:118] [discovery] Requesting info from "192.168.1.38:6443" again to validate TLS against the pinned public key
I0524 17:57:55.983254   10646 token.go:135] [discovery] Cluster info signature and contents are valid and TLS certificate validates against pinned roots, will use API Server "192.168.1.38:6443"
I0524 17:57:55.983268   10646 discovery.go:52] [discovery] Using provided TLSBootstrapToken as authentication credentials for the join process
I0524 17:57:55.983276   10646 join.go:489] [preflight] Fetching init configuration
I0524 17:57:55.983281   10646 join.go:534] [preflight] Retrieving KubeConfig objects
[preflight] Reading configuration from the cluster...
[preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml'
I0524 17:57:55.991118   10646 interface.go:431] Looking for default routes with IPv4 addresses
I0524 17:57:55.991128   10646 interface.go:436] Default route transits interface "ens18"
I0524 17:57:55.991236   10646 interface.go:208] Interface ens18 is up
I0524 17:57:55.991269   10646 interface.go:256] Interface "ens18" has 2 addresses :[192.168.1.15/21 fe80::68bf:2bff:feee:6c6e/64].
I0524 17:57:55.991284   10646 interface.go:223] Checking addr  192.168.1.15/21.
I0524 17:57:55.991288   10646 interface.go:230] IP found 192.168.1.15
I0524 17:57:55.991292   10646 interface.go:262] Found valid IPv4 address 192.168.1.15 for interface "ens18".
I0524 17:57:55.991295   10646 interface.go:442] Found active IP 192.168.1.15 
I0524 17:57:55.994214   10646 preflight.go:103] [preflight] Running configuration dependant checks
[preflight] Running pre-flight checks before initializing the new control plane instance
I0524 17:57:55.994260   10646 checks.go:577] validating Kubernetes and kubeadm version
I0524 17:57:55.994304   10646 checks.go:170] validating if the firewall is enabled and active
I0524 17:57:56.001072   10646 checks.go:205] validating availability of port 6443
I0524 17:57:56.001119   10646 checks.go:205] validating availability of port 10259
I0524 17:57:56.001134   10646 checks.go:205] validating availability of port 10257
I0524 17:57:56.001149   10646 checks.go:282] validating the existence of file /etc/kubernetes/manifests/kube-apiserver.yaml
I0524 17:57:56.001162   10646 checks.go:282] validating the existence of file /etc/kubernetes/manifests/kube-controller-manager.yaml
I0524 17:57:56.001170   10646 checks.go:282] validating the existence of file /etc/kubernetes/manifests/kube-scheduler.yaml
I0524 17:57:56.001174   10646 checks.go:282] validating the existence of file /etc/kubernetes/manifests/etcd.yaml
I0524 17:57:56.001178   10646 checks.go:432] validating if the connectivity type is via proxy or direct
I0524 17:57:56.001195   10646 checks.go:471] validating http connectivity to first IP address in the CIDR
I0524 17:57:56.001208   10646 checks.go:471] validating http connectivity to first IP address in the CIDR
I0524 17:57:56.001217   10646 checks.go:205] validating availability of port 2379
I0524 17:57:56.001235   10646 checks.go:205] validating availability of port 2380
I0524 17:57:56.001247   10646 checks.go:245] validating the existence and emptiness of directory /var/lib/etcd
[preflight] Pulling images required for setting up a Kubernetes cluster
[preflight] This might take a minute or two, depending on the speed of your internet connection
[preflight] You can also perform this action in beforehand using 'kubeadm config images pull'
I0524 17:57:56.001349   10646 checks.go:838] using image pull policy: IfNotPresent
I0524 17:57:56.018435   10646 checks.go:847] image exists: registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver:v1.22.4
I0524 17:57:56.033614   10646 checks.go:847] image exists: registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager:v1.22.4
I0524 17:57:56.049090   10646 checks.go:847] image exists: registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler:v1.22.4
I0524 17:57:56.064531   10646 checks.go:847] image exists: registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.22.4
I0524 17:57:56.082128   10646 checks.go:847] image exists: registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.5
I0524 17:57:56.097267   10646 checks.go:847] image exists: registry.cn-hangzhou.aliyuncs.com/google_containers/etcd:3.5.0-0
I0524 17:57:56.113455   10646 checks.go:847] image exists: registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:v1.8.4
[download-certs] Downloading the certificates in Secret "kubeadm-certs" in the "kube-system" Namespace
[certs] Using certificateDir folder "/etc/kubernetes/pki"
I0524 17:57:56.118314   10646 certs.go:46] creating PKI assets
I0524 17:57:56.118376   10646 certs.go:487] validating certificate period for etcd/ca certificate
[certs] Generating "etcd/server" certificate and key
[certs] etcd/server serving cert is signed for DNS names [dev-k8s-master01 localhost] and IPs [192.168.1.15 127.0.0.1 ::1]
[certs] Generating "etcd/peer" certificate and key
[certs] etcd/peer serving cert is signed for DNS names [dev-k8s-master01 localhost] and IPs [192.168.1.15 127.0.0.1 ::1]
[certs] Generating "apiserver-etcd-client" certificate and key
[certs] Generating "etcd/healthcheck-client" certificate and key
I0524 17:57:57.010895   10646 certs.go:487] validating certificate period for ca certificate
[certs] Generating "apiserver-kubelet-client" certificate and key
[certs] Generating "apiserver" certificate and key
[certs] apiserver serving cert is signed for DNS names [dev-k8s-master01 dev-k8s-master02 dev-k8s-master03 k8s-dev-master.ex-ai.com kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local] and IPs [10.96.0.1 192.168.1.15 192.168.7.173 192.168.1.38 192.168.0.163 192.168.0.90]
I0524 17:57:57.339536   10646 certs.go:487] validating certificate period for front-proxy-ca certificate
[certs] Generating "front-proxy-client" certificate and key
[certs] Valid certificates and keys now exist in "/etc/kubernetes/pki"
I0524 17:57:57.385838   10646 certs.go:77] creating new public/private key files for signing service account users
[certs] Using the existing "sa" key
[kubeconfig] Generating kubeconfig files
[kubeconfig] Using kubeconfig folder "/etc/kubernetes"
[kubeconfig] Writing "admin.conf" kubeconfig file
[kubeconfig] Writing "controller-manager.conf" kubeconfig file
[kubeconfig] Writing "scheduler.conf" kubeconfig file
[control-plane] Using manifest folder "/etc/kubernetes/manifests"
[control-plane] Creating static Pod manifest for "kube-apiserver"
I0524 17:57:58.009494   10646 manifests.go:99] [control-plane] getting StaticPodSpecs
I0524 17:57:58.009751   10646 certs.go:487] validating certificate period for CA certificate
I0524 17:57:58.009827   10646 manifests.go:125] [control-plane] adding volume "ca-certs" for component "kube-apiserver"
I0524 17:57:58.009841   10646 manifests.go:125] [control-plane] adding volume "etc-ca-certificates" for component "kube-apiserver"
I0524 17:57:58.009847   10646 manifests.go:125] [control-plane] adding volume "etc-pki" for component "kube-apiserver"
I0524 17:57:58.009854   10646 manifests.go:125] [control-plane] adding volume "k8s-certs" for component "kube-apiserver"
I0524 17:57:58.009862   10646 manifests.go:125] [control-plane] adding volume "usr-local-share-ca-certificates" for component "kube-apiserver"
I0524 17:57:58.009869   10646 manifests.go:125] [control-plane] adding volume "usr-share-ca-certificates" for component "kube-apiserver"
I0524 17:57:58.016124   10646 manifests.go:154] [control-plane] wrote static Pod manifest for component "kube-apiserver" to "/etc/kubernetes/manifests/kube-apiserver.yaml"
[control-plane] Creating static Pod manifest for "kube-controller-manager"
I0524 17:57:58.016145   10646 manifests.go:99] [control-plane] getting StaticPodSpecs
I0524 17:57:58.016322   10646 manifests.go:125] [control-plane] adding volume "ca-certs" for component "kube-controller-manager"
I0524 17:57:58.016335   10646 manifests.go:125] [control-plane] adding volume "etc-ca-certificates" for component "kube-controller-manager"
I0524 17:57:58.016341   10646 manifests.go:125] [control-plane] adding volume "etc-pki" for component "kube-controller-manager"
I0524 17:57:58.016348   10646 manifests.go:125] [control-plane] adding volume "flexvolume-dir" for component "kube-controller-manager"
I0524 17:57:58.016356   10646 manifests.go:125] [control-plane] adding volume "k8s-certs" for component "kube-controller-manager"
I0524 17:57:58.016363   10646 manifests.go:125] [control-plane] adding volume "kubeconfig" for component "kube-controller-manager"
I0524 17:57:58.016370   10646 manifests.go:125] [control-plane] adding volume "usr-local-share-ca-certificates" for component "kube-controller-manager"
I0524 17:57:58.016377   10646 manifests.go:125] [control-plane] adding volume "usr-share-ca-certificates" for component "kube-controller-manager"
I0524 17:57:58.016980   10646 manifests.go:154] [control-plane] wrote static Pod manifest for component "kube-controller-manager" to "/etc/kubernetes/manifests/kube-controller-manager.yaml"
[control-plane] Creating static Pod manifest for "kube-scheduler"
I0524 17:57:58.016998   10646 manifests.go:99] [control-plane] getting StaticPodSpecs
I0524 17:57:58.017171   10646 manifests.go:125] [control-plane] adding volume "kubeconfig" for component "kube-scheduler"
I0524 17:57:58.017507   10646 manifests.go:154] [control-plane] wrote static Pod manifest for component "kube-scheduler" to "/etc/kubernetes/manifests/kube-scheduler.yaml"
[check-etcd] Checking that the etcd cluster is healthy
I0524 17:57:58.018268   10646 local.go:71] [etcd] Checking etcd cluster health
I0524 17:57:58.018282   10646 local.go:74] creating etcd client that connects to etcd pods
I0524 17:57:58.018291   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:58:02.138320   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:58:05.187304   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:58:08.258177   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:58:11.356253   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:58:14.366123   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:58:17.447385   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:58:20.513218   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:58:23.606232   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:58:26.699159   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:58:29.800693   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:58:32.813094   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:58:35.901599   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:58:38.967241   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:58:42.054078   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:58:45.107540   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:58:48.180650   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:58:51.291295   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:58:54.317130   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:58:57.388214   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:59:00.476226   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:59:03.569171   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:59:06.669514   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:59:09.685159   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:59:12.757184   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:59:15.875321   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:59:18.892172   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:59:22.030165   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:59:25.085195   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
I0524 17:59:28.139599   10646 etcd.go:166] retrieving etcd endpoints from "kubeadm.kubernetes.io/etcd.advertise-client-urls" annotation in etcd Pods
Get "https://192.168.7.173:6443/api/v1/namespaces/kube-system/pods?labelSelector=component%3Detcd%2Ctier%3Dcontrol-plane": dial tcp 192.168.7.173:6443: connect: no route to host
could not retrieve the list of etcd endpoints
k8s.io/kubernetes/cmd/kubeadm/app/util/etcd.getRawEtcdEndpointsFromPodAnnotation
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/cmd/kubeadm/app/util/etcd/etcd.go:155
k8s.io/kubernetes/cmd/kubeadm/app/util/etcd.getEtcdEndpointsWithBackoff
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/cmd/kubeadm/app/util/etcd/etcd.go:131
k8s.io/kubernetes/cmd/kubeadm/app/util/etcd.getEtcdEndpoints
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/cmd/kubeadm/app/util/etcd/etcd.go:127
k8s.io/kubernetes/cmd/kubeadm/app/util/etcd.NewFromCluster
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/cmd/kubeadm/app/util/etcd/etcd.go:98
k8s.io/kubernetes/cmd/kubeadm/app/phases/etcd.CheckLocalEtcdClusterStatus
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/cmd/kubeadm/app/phases/etcd/local.go:75
k8s.io/kubernetes/cmd/kubeadm/app/cmd/phases/join.runCheckEtcdPhase
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/cmd/kubeadm/app/cmd/phases/join/checketcd.go:69
k8s.io/kubernetes/cmd/kubeadm/app/cmd/phases/workflow.(*Runner).Run.func1
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/cmd/kubeadm/app/cmd/phases/workflow/runner.go:234
k8s.io/kubernetes/cmd/kubeadm/app/cmd/phases/workflow.(*Runner).visitAll
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/cmd/kubeadm/app/cmd/phases/workflow/runner.go:421
k8s.io/kubernetes/cmd/kubeadm/app/cmd/phases/workflow.(*Runner).Run
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/cmd/kubeadm/app/cmd/phases/workflow/runner.go:207
k8s.io/kubernetes/cmd/kubeadm/app/cmd.newCmdJoin.func1
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/cmd/kubeadm/app/cmd/join.go:174
k8s.io/kubernetes/vendor/github.com/spf13/cobra.(*Command).execute
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/github.com/spf13/cobra/command.go:852
k8s.io/kubernetes/vendor/github.com/spf13/cobra.(*Command).ExecuteC
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/github.com/spf13/cobra/command.go:960
k8s.io/kubernetes/vendor/github.com/spf13/cobra.(*Command).Execute
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/github.com/spf13/cobra/command.go:897
k8s.io/kubernetes/cmd/kubeadm/app.Run
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/cmd/kubeadm/app/kubeadm.go:50
main.main
	_output/local/go/src/k8s.io/kubernetes/cmd/kubeadm/kubeadm.go:25
runtime.main
	/usr/local/go/src/runtime/proc.go:225
runtime.goexit
	/usr/local/go/src/runtime/asm_amd64.s:1371
error execution phase check-etcd
k8s.io/kubernetes/cmd/kubeadm/app/cmd/phases/workflow.(*Runner).Run.func1
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/cmd/kubeadm/app/cmd/phases/workflow/runner.go:235
k8s.io/kubernetes/cmd/kubeadm/app/cmd/phases/workflow.(*Runner).visitAll
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/cmd/kubeadm/app/cmd/phases/workflow/runner.go:421
k8s.io/kubernetes/cmd/kubeadm/app/cmd/phases/workflow.(*Runner).Run
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/cmd/kubeadm/app/cmd/phases/workflow/runner.go:207
k8s.io/kubernetes/cmd/kubeadm/app/cmd.newCmdJoin.func1
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/cmd/kubeadm/app/cmd/join.go:174
k8s.io/kubernetes/vendor/github.com/spf13/cobra.(*Command).execute
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/github.com/spf13/cobra/command.go:852
k8s.io/kubernetes/vendor/github.com/spf13/cobra.(*Command).ExecuteC
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/github.com/spf13/cobra/command.go:960
k8s.io/kubernetes/vendor/github.com/spf13/cobra.(*Command).Execute
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/github.com/spf13/cobra/command.go:897
k8s.io/kubernetes/cmd/kubeadm/app.Run
	/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/cmd/kubeadm/app/kubeadm.go:50
main.main
	_output/local/go/src/k8s.io/kubernetes/cmd/kubeadm/kubeadm.go:25
runtime.main
	/usr/local/go/src/runtime/proc.go:225
runtime.goexit
	/usr/local/go/src/runtime/asm_amd64.s:1371

报错1

Get "https://192.168.7.173:6443/api/v1/namespaces/kube-system/pods?labelSelector=component%3Detcd%2Ctier%3Dcontrol-plane": dial tcp 192.168.7.173:6443: connect: no route to host

解决：在活着的master上更改kube-system ns下的kubeadm-config这个cm

bash 复制代码 
root@dev-k8s-master03:~# kubectl edit cm kubeadm-config
    controlPlaneEndpoint: 192.168.1.38:6443

有空继续补充

refer

https://cloud.tencent.com/developer/article/2008321

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