RKE2摆设高可用Rancher v2.7.1
先决条件[*]留意修改主机名，不要有辩说
配置负载平衡器和康健查抄
我这里使用的是VMware NSX-T负载平衡
这里有个坑，80端口的响应代码，必要把307,308,303标志为康健的状态码
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第一个server节点安装
官方文档的形貌感觉对于新手来说太不友爱了，建议以下链接都看一下。Rancher新老文档都建议看一下，不然刚刚入门很蒙。
RKE2快速开始：https://docs.rke2.io/zh/install/quickstart
RKE2高可用：https://docs.rke2.io/zh/install/ha
RKE2离线安装：https://docs.rke2.io/zh/install/airgap
RKE2卸载：https://docs.rke2.io/zh/install/linux_uninstall
Rancher Helm CLI快速入门：https://ranchermanager.docs.rancher.com/zh/getting-started/quick-start-guides/deploy-rancher-manager/helm-cli
Rancher 离线Helm安装：https://ranchermanager.docs.rancher.com/zh/getting-started/installation-and-upgrade/other-installation-methods/air-gapped-helm-cli-install/install-rancher-ha
老版Rancher文档 离线安装：https://docs.rancher.cn/docs/rancher2/installation/other-installation-methods/air-gap/install-rancher/_index
老版Rancher文档 怎样在国内使用 Rancher：https://docs.rancher.cn/docs/rancher2/best-practices/use-in-china/_index/
# 卸载
/usr/local/bin/rke2-uninstall.sh
# 配置文件，load_balancer_addr 负载均衡ip或者第一台serverip
load_balancer_addr=172.16.10.241
mkdir -p /etc/rancher/rke2 && echo "
tls-san:
- ${load_balancer_addr}
system-default-registry: \"docker.nju.edu.cn\"
" > /etc/rancher/rke2/config.yaml
# 检查配置
cat /etc/rancher/rke2/config.yaml
# 指定版本安装
curl -sfL https://rancher-mirror.rancher.cn/rke2/install.sh | INSTALL_RKE2_MIRROR=cn INSTALL_RKE2_VERSION=v1.22.17+rke2r1 sh -
# 安装最新stable版本
# curl -sfL https://rancher-mirror.rancher.cn/rke2/install.sh | INSTALL_RKE2_MIRROR=cn sh -
systemctl enable rke2-server.service && systemctl start rke2-server.service
# 查看日志
# journalctl -u rke2-server -f
实用程序注册到PATH
kubeconfig默认的server地址是127.0.0.1
在最小集群安装完成之后必要修改为负载平衡地址
echo 'export PATH=$PATH:/var/lib/rancher/rke2/bin;' >> ~/.bashrc && source ~/.bashrc
mkdir -p ~/.kube && rm -f ~/.kube/config && ln -s /etc/rancher/rke2/rke2.yaml ~/.kube/config
等待全部pod运行
root@rke1:~# watch -n 1 kubectl get pods -A
Every 1.0s: kubectl get pods -A rke1: Thu Mar 16 21:22:08 2023
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system cloud-controller-manager-rke1 1/1 Running 0 33m
kube-system etcd-rke1 1/1 Running 0 33m
kube-system helm-install-rke2-canal-mscjh 0/1 Completed 0 34m
kube-system helm-install-rke2-coredns-qrmgn 0/1 Completed 0 34m
kube-system helm-install-rke2-ingress-nginx-ddt95 0/1 Completed 0 34m
kube-system helm-install-rke2-metrics-server-6cm27 0/1 Completed 0 34m
kube-system kube-apiserver-rke1 1/1 Running 0 33m
kube-system kube-controller-manager-rke1 1/1 Running 0 33m
kube-system kube-proxy-rke1 1/1 Running 0 33m
kube-system kube-scheduler-rke1 1/1 Running 0 33m
kube-system rke2-canal-f56nc 2/2 Running 0 32m
kube-system rke2-coredns-rke2-coredns-69844654d9-lsvw6 1/1 Running 0 32m
kube-system rke2-coredns-rke2-coredns-autoscaler-95d984597-p9r6k 1/1 Running 0 32m
kube-system rke2-ingress-nginx-controller-4ddx9 1/1 Running 0 29m
kube-system rke2-metrics-server-765b64878b-jtq2v 1/1 Running 0 30m
注册令牌，接下来要用
cat /var/lib/rancher/rke2/server/node-token
其他server节点安装
# 配置文件，load_balancer_addr 负载均衡ip或者第一台serverip
load_balancer_addr=172.16.10.241 node_token=xxxxxxxx
mkdir -p /etc/rancher/rke2 && echo "
server: https://${load_balancer_addr}:9345
token: ${node_token}
tls-san:
- ${load_balancer_addr}
system-default-registry: \"docker.nju.edu.cn\"
" > /etc/rancher/rke2/config.yaml
# 检查配置
cat /etc/rancher/rke2/config.yaml
# 安装
curl -sfL https://rancher-mirror.rancher.cn/rke2/install.sh | INSTALL_RKE2_MIRROR=cn INSTALL_RKE2_VERSION=v1.22.17+rke2r1 sh -
systemctl enable rke2-server.service && systemctl start rke2-server.service
实用程序注册到PATH
echo 'export PATH=$PATH:/var/lib/rancher/rke2/bin;' >> ~/.bashrc && source ~/.bashrc
mkdir -p ~/.kube && rm -f ~/.kube/config && ln -s /etc/rancher/rke2/rke2.yaml ~/.kube/config
这里使用kubectl可能会反应很慢，必要修改kubeconfig中server的地址为负载平衡地址
load_balancer_addr=rancher2.ent.top
sed -i.bak "s/127.0.0.1:6443/${load_balancer_addr}:6443/" /etc/rancher/rke2/rke2.yaml
安装helm
# 下载 helm 并上传 https://github.com/helm/helm/releases
rm -rf linux-amd64/helm && tar -zxvf helm-v3.10.3-linux-amd64.tar.gz && mv linux-amd64/helm /usr/local/bin/helm && helm version
安装Cert-Manager
# 可以下载过来然后在 kubectl apply -f cert-manager.crds.yaml
kubectl apply -f https://github.com/cert-manager/cert-manager/releases/download/v1.7.1/cert-manager.crds.yaml
helm repo add jetstack https://charts.jetstack.io && helm repo update
helm install cert-manager jetstack/cert-manager \
--set image.repository=quay.nju.edu.cn/jetstack/cert-manager-controller \
--set webhook.image.repository=quay.nju.edu.cn/jetstack/cert-manager-webhook \
--set cainjector.image.repository=quay.nju.edu.cn/jetstack/cert-manager-cainjector \
--set startupapicheck.image.repository=quay.nju.edu.cn/jetstack/cert-manager-ctl \
--namespace cert-manager \
--create-namespace \
--version v1.7.1
安装Rancher
这里也有个坑，不能安装离线安装文档中加
--set certmanager.version=<CERTMANAGER_VERSION> 参数，会报错如下
unable to build kubernetes objects from release manifest: resource mapping not found for name: "rancher" namespace: ""
helm repo add rancher-latest https://rancher-mirror.rancher.cn/server-charts/latest
kubectl create namespace cattle-system
# rancher域名，要么解析dns，要么加入自己电脑hosts
rancher_domain=rancher01.ent.top
helm install rancher rancher-latest/rancher \
--namespace cattle-system \
--set hostname=${rancher_domain} \
--set rancherImage=docker.nju.edu.cn/rancher/rancher \
--set systemDefaultRegistry=docker.nju.edu.cn
安装完成
密码看提示
$(kubectl get secret --namespace cattle-system bootstrap-secret -o go-template='{{.data.bootstrapPassword|base64decode}}')
或者直接用链接（其实就是跳过输入上面随秘密码的阶段，直接到下一步设置admin密码）
echo https://rancher01.ent.top/dashboard/?setup=$(kubectl get secret --namespace cattle-system bootstrap-secret -o go-template='{{.data.bootstrapPassword|base64decode}}')
https://i-blog.csdnimg.cn/blog_migrate/d9f8416f4b27195bcd558dad975fb718.png
https://i-blog.csdnimg.cn/blog_migrate/d0442ebcf2a2f048ebd92d8cf0d89409.png
https://i-blog.csdnimg.cn/blog_migrate/dc572b91ed49d8b12bf7ddb0c28ba096.png
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