kube-vip 简介
kube-vip 是一个开源项目，旨在简化为 Kubernetes 集群提供负载均衡服务。
kube-vip 为 Kubernetes 集群提供虚拟 IP 和负载均衡器，用于控制平面（用于构建高可用集群）和 Kubernetes 服务类型，而无需依赖LoadBalancer任何外部硬件或软件。
kube-vip 的最初目的是简化高可用（HA）Kubernetes 集群的构建，当时该集群涉及一些需要管理的组件和配置。随着项目的发展，它现在可以使用相同的技术为 LoadBalancer类型的 Kubernetes Service资源提供负载均衡功能。
官方网站：https://kube-vip.io/
项目地址：https://github.com/kube-vip/kube-vip
基于kube-vip部署kubernetes集群
本示例中的安装部署Kubernetes集群将基于以下环境进行：
- OS: Ubuntu Server 22.04 LTS
- Kubernetes：v1.28.1
- Container Runtime: Containerd
前置要求：
- 至少2个CPU、2G内存
- 禁用swap交换分区
- 允许 iptables 检查桥接流量
本次使用kubeadm部署4节点的 Kubernetes集群，包含3个master节点及1个worker节点。采用 kube-vip 来实现高可用，所有节点访问 VIP 来通讯。而且 kube-vip x 3 都运行在 Control Plane 所在的主机中，以减少集群主机数量。
注意：使用kube-vip管理vip需要保证vip和节点ip在同一子网中。
节点清单：
| 节点名称 | 节点IP | 节点角色 | CPU | 内存 | 磁盘 | OS |
|---|---|---|---|---|---|---|
| master1 | 192.168.72.30 | master | 2C | 4G | 100G | Ubutnu 22.04 LTS |
| master2 | 192.168.72.31 | master | 2C | 4G | 100G | Ubutnu 22.04 LTS |
| master3 | 192.168.72.32 | master | 2C | 4G | 100G | Ubutnu 22.04 LTS |
| node1 | 192.168.72.33 | worker | 2C | 4G | 100G | Ubutnu 22.04 LTS |
| kube-vip | 192.168.72.200 |
节点初始化
说明：以下操作在所有节点执行。
1、配置主机名
hostnamectl set-hostname master1
hostnamectl set-hostname master2
hostnamectl set-hostname master3
hostnamectl set-hostname node1
2、配置hosts解析
cat >> /etc/hosts << EOF
192.168.72.200 lb.k8s.local
192.168.72.30 master1
192.168.72.31 master2
192.168.72.32 master3
192.168.72.33 node1
EOF
3、关闭swap
sed -ri '/\sswap\s/s/^#?/#/' /etc/fstab
mount -a
swapoff -a
4、确认时间同步
apt install -y chrony
systemctl enable --now chrony
chronyc sources
5、加载ipvs内核模块
参考：https://github.com/kubernetes/kubernetes/tree/master/pkg/proxy/ipvs
另外，针对Linux kernel 4.19以上的内核版本使用nf_conntrack 代替nf_conntrack_ipv4。
cat <<EOF | tee /etc/modules-load.d/ipvs.conf
# Load IPVS at boot
ip_vs
ip_vs_rr
ip_vs_wrr
ip_vs_sh
nf_conntrack
EOF
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
modprobe -- nf_conntrack
#确认内核模块加载成功
lsmod | grep -e ip_vs -e nf_conntrack
#安装ipset和ipvsadm
apt install -y ipset ipvsadm
安装containerd
说明：以下操作在所有节点执行。
1、安装containerd容器运行时的前置条件
cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF
sudo modprobe overlay
sudo modprobe br_netfilter
# 设置必需的 sysctl 参数，这些参数在重新启动后仍然存在。
cat <<EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF
# 应用 sysctl 参数而无需重新启动
sudo sysctl --system
2、安装containerd容器运行时，如果网络较差，建议使用浏览器下载到本地，在上传到服务器。
下载地址：https://github.com/containerd/nerdctl/releases
wget https://github.com/containerd/nerdctl/releases/download/v1.5.0/nerdctl-full-1.5.0-linux-amd64.tar.gz
tar Cxzvvf /usr/local nerdctl-full-1.5.0-linux-amd64.tar.gz
3、创建containerd配置文件
sudo mkdir -p /etc/containerd
containerd config default | sudo tee /etc/containerd/config.toml
4、配置使用 systemd cgroup 驱动程序
sed -i "s#SystemdCgroup = false#SystemdCgroup = true#g" /etc/containerd/config.toml
5、修改基础设施镜像，安装kubeadm后使用kubeadm config images list命令确认pause默认镜像tag
old_image='sandbox_image = "registry.k8s.io/pause:.*"'
new_image='sandbox_image = "registry.aliyuncs.com/google_containers/pause:3.9"'
sed -i "s|$old_image|$new_image|" /etc/containerd/config.toml
6、启动containerd服务
systemctl enable --now containerd
7、查看containerd运行状态
systemctl status containerd
安装kubeadm
说明：以下操作在所有节点执行。
1、添加kubernetes源，使用阿里云apt源进行替换：
apt update -y
apt-get install -y apt-transport-https
curl https://mirrors.aliyun.com/kubernetes/apt/doc/apt-key.gpg | apt-key add -
cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
deb https://mirrors.aliyun.com/kubernetes/apt/ kubernetes-xenial main
EOF
2、查看可安装的版本
apt-get update
apt-cache madison kubectl | more
3、安装指定版本kubeadm、kubelet及kubectl
export KUBERNETES_VERSION=1.28.1-00
apt update -y
apt-get install -y kubelet=${KUBERNETES_VERSION} kubeadm=${KUBERNETES_VERSION} kubectl=${KUBERNETES_VERSION}
apt-mark hold kubelet kubeadm kubectl
4、启动kubelet服务
systemctl enable --now kubelet
生成kube-vip配置文件
说明：以下操作在第一个master节点执行。
1、生成kube-vip 静态yaml配置文件
export VIP=192.168.72.200
export INTERFACE=ens33
export KVVERSION=v0.6.2
nerdctl run -it --rm --net=host ghcr.io/kube-vip/kube-vip:$KVVERSION manifest pod \
--interface $INTERFACE \
--address $VIP \
--controlplane \
--services \
--arp \
--enableLoadBalancer \
--leaderElection | tee /etc/kubernetes/manifests/kube-vip.yaml
2、修改镜像拉取策略
sed -i "s#imagePullPolicy: Always#imagePullPolicy: IfNotPresent#g" \
/etc/kubernetes/manifests/kube-vip.yaml
3、复制kube-vip.yaml到其他master节点
scp -r /etc/kubernetes/manifests/kube-vip.yaml 192.168.72.31:/etc/kubernetes/manifests/
scp -r /etc/kubernetes/manifests/kube-vip.yaml 192.168.72.32:/etc/kubernetes/manifests/
4、提前在所有master节点拉取kube-vip镜像
nerdctl -n k8s.io pull ghcr.io/kube-vip/kube-vip:v0.6.2
提前拉取k8s镜像
备注：以下操作在所有节点执行。
1、查看可安装的kubernetes版本
kubectl version --short
2、查看对应kubernetes版本的容器镜像
kubeadm config images list \
--kubernetes-version=v1.28.1 \
--image-repository registry.aliyuncs.com/google_containers
3、在所有节点执行以下命令，提前拉取镜像
kubeadm config images pull \
--kubernetes-version=v1.28.1 \
--image-repository registry.aliyuncs.com/google_containers
4、查看拉取的镜像
root@master1:~# nerdctl -n k8s.io images |grep -v none
REPOSITORY TAG IMAGE ID CREATED PLATFORM SIZE BLOB SIZE
ghcr.io/kube-vip/kube-vip v0.6.2 d9271fa975a4 2 minutes ago linux/amd64 40.8 MiB 40.8 MiB
registry.aliyuncs.com/google_containers/coredns v1.10.1 90d3eeb2e210 About a minute ago linux/amd64 51.1 MiB 15.4 MiB
registry.aliyuncs.com/google_containers/etcd 3.5.9-0 b124583790d2 About a minute ago linux/amd64 283.8 MiB 98.1 MiB
registry.aliyuncs.com/google_containers/kube-apiserver v1.28.1 1e9a3ea7d1d4 2 minutes ago linux/amd64 123.1 MiB 33.0 MiB
registry.aliyuncs.com/google_containers/kube-controller-manager v1.28.1 f6838231cb74 2 minutes ago linux/amd64 119.5 MiB 31.8 MiB
registry.aliyuncs.com/google_containers/kube-proxy v1.28.1 feb6017bf009 About a minute ago linux/amd64 73.6 MiB 23.4 MiB
registry.aliyuncs.com/google_containers/kube-scheduler v1.28.1 b76ea016d6b9 2 minutes ago linux/amd64 60.6 MiB 17.9 MiB
registry.aliyuncs.com/google_containers/pause 3.9 7031c1b28338 About a minute ago linux/amd64 728.0 KiB 314.0 KiB
创建集群配置文件
说明：以下操作仅在第一个master节点执行。
1、生成默认的集群初始化配置文件。
kubeadm config print init-defaults --component-configs KubeProxyConfiguration > kubeadm.yaml
2、修改集群配置文件
$ cat kubeadm.yaml
apiVersion: kubeadm.k8s.io/v1beta3
bootstrapTokens:
- groups:
- system:bootstrappers:kubeadm:default-node-token
token: abcdef.0123456789abcdef
ttl: 24h0m0s
usages:
- signing
- authentication
kind: InitConfiguration
localAPIEndpoint:
advertiseAddress: 192.168.72.30
bindPort: 6443
nodeRegistration:
criSocket: unix:///var/run/containerd/containerd.sock
imagePullPolicy: IfNotPresent
name: master1
taints: null
---
apiServer:
timeoutForControlPlane: 4m0s
certSANs:
- lb.k8s.local
- master1
- master2
- master3
- node1
- 192.168.72.30
- 192.168.72.31
- 192.168.72.32
- 192.168.72.33
controlPlaneEndpoint: lb.k8s.local:6443
apiVersion: kubeadm.k8s.io/v1beta3
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controllerManager: {}
dns: {}
etcd:
local:
dataDir: /var/lib/etcd
imageRepository: registry.aliyuncs.com/google_containers
kind: ClusterConfiguration
kubernetesVersion: 1.28.1
networking:
dnsDomain: cluster.local
serviceSubnet: 10.96.0.0/12
podSubnet: 10.244.0.0/16
scheduler: {}
---
apiVersion: kubelet.config.k8s.io/v1beta1
authentication:
anonymous:
enabled: false
webhook:
cacheTTL: 0s
enabled: true
x509:
clientCAFile: /etc/kubernetes/pki/ca.crt
authorization:
mode: Webhook
webhook:
cacheAuthorizedTTL: 0s
cacheUnauthorizedTTL: 0s
cgroupDriver: systemd
clusterDNS:
- 10.96.0.10
clusterDomain: cluster.local
containerRuntimeEndpoint: ""
cpuManagerReconcilePeriod: 0s
evictionPressureTransitionPeriod: 0s
fileCheckFrequency: 0s
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 0s
imageMinimumGCAge: 0s
kind: KubeletConfiguration
logging:
flushFrequency: 0
options:
json:
infoBufferSize: "0"
verbosity: 0
memorySwap: {}
nodeStatusReportFrequency: 0s
nodeStatusUpdateFrequency: 0s
resolvConf: /run/systemd/resolve/resolv.conf
rotateCertificates: true
runtimeRequestTimeout: 0s
shutdownGracePeriod: 0s
shutdownGracePeriodCriticalPods: 0s
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 0s
syncFrequency: 0s
volumeStatsAggPeriod: 0s
---
---
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 0.0.0.0
bindAddressHardFail: false
clientConnection:
acceptContentTypes: ""
burst: 0
contentType: ""
kubeconfig: /var/lib/kube-proxy/kubeconfig.conf
qps: 0
clusterCIDR: ""
configSyncPeriod: 0s
conntrack:
maxPerCore: null
min: null
tcpCloseWaitTimeout: null
tcpEstablishedTimeout: null
detectLocal:
bridgeInterface: ""
interfaceNamePrefix: ""
detectLocalMode: ""
enableProfiling: false
healthzBindAddress: ""
hostnameOverride: ""
iptables:
localhostNodePorts: null
masqueradeAll: false
masqueradeBit: null
minSyncPeriod: 0s
syncPeriod: 0s
ipvs:
excludeCIDRs: null
minSyncPeriod: 0s
scheduler: ""
strictARP: false
syncPeriod: 0s
tcpFinTimeout: 0s
tcpTimeout: 0s
udpTimeout: 0s
kind: KubeProxyConfiguration
logging:
flushFrequency: 0
options:
json:
infoBufferSize: "0"
verbosity: 0
metricsBindAddress: ""
mode: "ipvs"
nodePortAddresses: null
oomScoreAdj: null
portRange: ""
showHiddenMetricsForVersion: ""
winkernel:
enableDSR: false
forwardHealthCheckVip: false
networkName: ""
rootHnsEndpointName: ""
sourceVip: ""
3、在默认值基础之上需要配置的参数说明：
InitConfiguration
kind: InitConfiguration
apiVersion: kubeadm.k8s.io/v1beta3
localAPIEndpoint:
advertiseAddress: 192.168.72.30
bindPort: 6443
nodeRegistration:
name: master1
ClusterConfiguration
kind: ClusterConfiguration
apiVersion: kubeadm.k8s.io/v1beta3
controlPlaneEndpoint: lb.k8s.local:6443
imageRepository: registry.aliyuncs.com/google_containers
kubernetesVersion: 1.28.1
networking:
dnsDomain: cluster.local
serviceSubnet: 10.96.0.0/12
podSubnet: 10.244.0.0/16
apiServer:
certSANs:
- lb.k8s.local
- master1
- master2
- master3
- node1
- 192.168.72.30
- 192.168.72.31
- 192.168.72.32
- 192.168.72.33
KubeletConfiguration
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
cgroupDriver: systemd
clusterDNS:
- 10.96.0.10
clusterDomain: cluster.local
containerRuntimeEndpoint: ""
KubeProxyConfiguration
kind: KubeProxyConfiguration
apiVersion: kubeproxy.config.k8s.io/v1alpha1
mode: "ipvs"
初始化第一个master节点
1、在第一个master节点运行以下命令开始初始化master节点：
kubeadm init --upload-certs --config kubeadm.yaml
如果初始化报错可以执行以下命令检查kubelet相关日志。
journalctl -xeu kubelet
2、记录日志输出中的join control-plane和join worker命令。
3、查看master1节点生成的vip地址
root@master1:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 00:50:56:aa:75:9f brd ff:ff:ff:ff:ff:ff
altname enp2s1
inet 192.168.72.30/24 brd 192.168.72.255 scope global ens33
valid_lft forever preferred_lft forever
inet 192.168.72.200/32 scope global deprecated dynamic ens33
valid_lft 58sec preferred_lft 0sec
inet6 fe80::250:56ff:feaa:759f/64 scope link
valid_lft forever preferred_lft forever
3: kube-ipvs0: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN group default
link/ether a2:de:63:b2:34:ce brd ff:ff:ff:ff:ff:ff
inet 10.96.0.1/32 scope global kube-ipvs0
valid_lft forever preferred_lft forever
inet 10.96.0.10/32 scope global kube-ipvs0
valid_lft forever preferred_lft forever
4、master节点初始化完成后参考最后提示配置kubectl客户端连接
mkdir -p $HOME/.kube
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
chown $(id -u):$(id -g) $HOME/.kube/config
5、查看节点状态，当前还未安装网络插件节点处于NotReady状态
root@master1:~# kubectl get nodes
NAME STATUS ROLES AGE VERSION
node NotReady control-plane 40s v1.28.1
6、查看pod状态，当前还未安装网络插件coredns pod处于Pending状态
root@master1:~# kubectl get pods -A
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system coredns-66f779496c-44fcc 0/1 Pending 0 32s
kube-system coredns-66f779496c-9cjmf 0/1 Pending 0 32s
kube-system etcd-node 1/1 Running 1 44s
kube-system kube-apiserver-node 1/1 Running 1 44s
kube-system kube-controller-manager-node 1/1 Running 1 44s
kube-system kube-proxy-g4kns 1/1 Running 0 32s
kube-system kube-scheduler-node 1/1 Running 1 44s
kube-system kube-vip-node 1/1 Running 1 46s
安装calico网络插件
说明：以下操作仅在第一个master节点执行。
参考：https://projectcalico.docs.tigera.io/getting-started/kubernetes/quickstart
1、在第一个master节点安装helm
version=v3.12.3
curl -LO https://repo.huaweicloud.com/helm/${version}/helm-${version}-linux-amd64.tar.gz
tar -zxvf helm-${version}-linux-amd64.tar.gz
mv linux-amd64/helm /usr/local/bin/helm && rm -rf linux-amd64
2、添加calico helm 仓库
helm repo add projectcalico https://projectcalico.docs.tigera.io/charts
3、部署calico，如果无法访问dockerhub，可能需要提前拉取镜像
helm install calico projectcalico/tigera-operator \
--namespace tigera-operator --create-namespace
4、查看节点变为Ready状态
root@master1:~# kubectl get nodes
NAME STATUS ROLES AGE VERSION
node Ready control-plane 17m v1.28.1
5、查看coredns pod状态变为Running
root@master1:~# kubectl get pods -A
NAMESPACE NAME READY STATUS RESTARTS AGE
calico-apiserver calico-apiserver-c7b9c94d5-ck6n8 1/1 Running 0 4m6s
calico-apiserver calico-apiserver-c7b9c94d5-fjbbh 1/1 Running 0 4m6s
calico-system calico-kube-controllers-9c4d4576f-rtbm5 1/1 Running 0 11m
calico-system calico-node-vwkhs 1/1 Running 0 11m
calico-system calico-typha-76c649f99d-7gdsv 1/1 Running 0 11m
calico-system csi-node-driver-fzlck 2/2 Running 0 11m
kube-system coredns-66f779496c-44fcc 1/1 Running 0 17m
kube-system coredns-66f779496c-9cjmf 1/1 Running 0 17m
kube-system etcd-node 1/1 Running 1 17m
kube-system kube-apiserver-node 1/1 Running 1 17m
kube-system kube-controller-manager-node 1/1 Running 1 17m
kube-system kube-proxy-g4kns 1/1 Running 0 17m
kube-system kube-scheduler-node 1/1 Running 1 17m
kube-system kube-vip-node 1/1 Running 1 17m
tigera-operator tigera-operator-94d7f7696-lzrrz 1/1 Running 0 11m
master节点加入集群
1、分别在第2和第3个master节点执行以下命令
kubeadm join lb.k8s.local:6443 --token abcdef.0123456789abcdef \
--discovery-token-ca-cert-hash sha256:7e25d6bc9368f5ab747c8c0b3349c5441005e0e15914cd4be1eac6351fb1e320 \
--control-plane --certificate-key fbae5ace48cf806fe5df818174859e3a837cf316156cd6e26ec14c7fca28fba3
2、如果master初始化后未记录节点加入集群命令，可以通过运行以下命令重新生成：
kubeadm token create --print-join-command --ttl 0
worker节点加入集群
1\在node1节点上执行如下命令，将其注册到 Cluster 中：
kubeadm join lb.k8s.local:6443 --token abcdef.0123456789abcdef \
--discovery-token-ca-cert-hash sha256:7e25d6bc9368f5ab747c8c0b3349c5441005e0e15914cd4be1eac6351fb1e320
2、通过 kubectl get nodes 查看节点的状态。
root@master1:~# kubectl get nodes -o wide
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
master1 Ready control-plane 22m v1.28.1 192.168.72.30 <none> Ubuntu 22.04.2 LTS 5.15.0-76-generic containerd://1.7.3
master2 Ready control-plane 4m34s v1.28.1 192.168.72.31 <none> Ubuntu 22.04.2 LTS 5.15.0-76-generic containerd://1.7.3
master3 Ready control-plane 3m48s v1.28.1 192.168.72.32 <none> Ubuntu 22.04.2 LTS 5.15.0-76-generic containerd://1.7.3
node1 Ready <none> 3m41s v1.28.1 192.168.72.33 <none> Ubuntu 22.04.2 LTS 5.15.0-76-generic containerd://1.7.3
3、最终运行的pods
root@master1:~# kubectl get pods -A -o wide
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
calico-apiserver calico-apiserver-866fdb498d-2jndc 1/1 Running 0 18m 10.244.137.69 master1 <none> <none>
calico-apiserver calico-apiserver-866fdb498d-672gj 1/1 Running 0 18m 10.244.137.70 master1 <none> <none>
calico-system calico-kube-controllers-57b4847fc8-zlf8t 1/1 Running 0 18m 10.244.137.66 master1 <none> <none>
calico-system calico-node-bxjhp 1/1 Running 0 18m 192.168.72.30 master1 <none> <none>
calico-system calico-node-j2zxw 1/1 Running 0 12m 192.168.72.31 master2 <none> <none>
calico-system calico-node-kjfhh 1/1 Running 0 11m 192.168.72.33 node1 <none> <none>
calico-system calico-node-zmngb 1/1 Running 0 11m 192.168.72.32 master3 <none> <none>
calico-system calico-typha-548dd44bd-hzj8b 1/1 Running 0 18m 192.168.72.30 master1 <none> <none>
calico-system calico-typha-548dd44bd-pjpn5 1/1 Running 0 11m 192.168.72.32 master3 <none> <none>
calico-system csi-node-driver-48xkx 2/2 Running 0 18m 10.244.137.65 master1 <none> <none>
calico-system csi-node-driver-rtxt2 2/2 Running 0 11m 10.244.136.1 master3 <none> <none>
calico-system csi-node-driver-ssfbh 2/2 Running 0 11m 10.244.166.129 node1 <none> <none>
calico-system csi-node-driver-v8h9l 2/2 Running 0 12m 10.244.180.1 master2 <none> <none>
kube-system coredns-66f779496c-ldfpv 1/1 Running 0 23m 10.244.137.68 master1 <none> <none>
kube-system coredns-66f779496c-zx8rs 1/1 Running 0 23m 10.244.137.67 master1 <none> <none>
kube-system etcd-master1 1/1 Running 0 23m 192.168.72.30 master1 <none> <none>
kube-system etcd-master2 1/1 Running 0 12m 192.168.72.31 master2 <none> <none>
kube-system etcd-master3 1/1 Running 0 12m 192.168.72.32 master3 <none> <none>
kube-system kube-apiserver-master1 1/1 Running 0 23m 192.168.72.30 master1 <none> <none>
kube-system kube-apiserver-master2 1/1 Running 0 12m 192.168.72.31 master2 <none> <none>
kube-system kube-apiserver-master3 1/1 Running 1 (12m ago) 12m 192.168.72.32 master3 <none> <none>
kube-system kube-controller-manager-master1 1/1 Running 1 (12m ago) 23m 192.168.72.30 master1 <none> <none>
kube-system kube-controller-manager-master2 1/1 Running 0 12m 192.168.72.31 master2 <none> <none>
kube-system kube-controller-manager-master3 1/1 Running 0 11m 192.168.72.32 master3 <none> <none>
kube-system kube-proxy-4dzjw 1/1 Running 0 23m 192.168.72.30 master1 <none> <none>
kube-system kube-proxy-cqkbr 1/1 Running 0 11m 192.168.72.32 master3 <none> <none>
kube-system kube-proxy-vcr8w 1/1 Running 0 11m 192.168.72.33 node1 <none> <none>
kube-system kube-proxy-x6tkn 1/1 Running 0 12m 192.168.72.31 master2 <none> <none>
kube-system kube-scheduler-master1 1/1 Running 1 (12m ago) 23m 192.168.72.30 master1 <none> <none>
kube-system kube-scheduler-master2 1/1 Running 0 12m 192.168.72.31 master2 <none> <none>
kube-system kube-scheduler-master3 1/1 Running 0 12m 192.168.72.32 master3 <none> <none>
kube-system kube-vip-master1 1/1 Running 1 (12m ago) 23m 192.168.72.30 master1 <none> <none>
kube-system kube-vip-master2 1/1 Running 0 12m 192.168.72.31 master2 <none> <none>
kube-system kube-vip-master3 1/1 Running 0 11m 192.168.72.32 master3 <none> <none>
tigera-operator tigera-operator-94d7f7696-b5fbl 1/1 Running 1 (12m ago) 19m 192.168.72.30 master1 <none> <none>
验证集群高可用
1、关闭master1节点
root@master1:~# shutdown -h now
2、查看vip地址自动转移到master3节点
root@master3:~# ip a |grep ens33
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
inet 192.168.72.32/24 brd 192.168.72.255 scope global ens33
inet 192.168.72.200/32 scope global ens33
3、在master3节点配置kubectl客户端连接信息
mkdir -p $HOME/.kube
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
chown $(id -u):$(id -g) $HOME/.kube/config
4、在master3节点验证依然能够正常访问集群
root@master3:~# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master1 NotReady control-plane 39m v1.28.1
master2 Ready control-plane 27m v1.28.1
master3 Ready control-plane 27m v1.28.1
node1 Ready <none> 27m v1.28.1
至此，基于kube-vip的高可用集群部署完成。
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