Rancher 高可用部署

create user rancher identified by 'rancher#1Yer';
grant all privileges on rancher.* to rancher@'<yourNodeIP1>' identified by 'rancher#1Yer';
grant all privileges on rancher.* to rancher@'<yourNodeIP2>' identified by 'rancher#1Yer';
flush privileges;

# 安装依赖yum install -y yum-utils device-mapper-persistent-data lvm2
# 添加源
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
 
# 更新yum缓存
yum clean all
yum makecache fastyum -y
 
# 安装docker ce
yum install docker-ce-19.03.5-3.el7.x86_64
 
# 通过systemctl启动服务
systemctl start docker
  
# 开机自启动
systemctl enable docker
 
# 关闭docker 将docker存储位置转为/data目录（防止系统盘被占满),data目录根据实际情况修改
systemctl stop docker
 
mv /var/lib/docker /data/docker
ln -s /data/docker /var/lib/docker

wget https://storage.googleapis.com/kubernetes-release/release/v1.18.2/bin/linux/amd64/kubectl
 
chmod +x ./kubectl
 
sudo ln -s ./kubectl /usr/local/bin/kubectl
 
kubectl version --client

# 下载安装helm
wget https://get.helm.sh/helm-v3.2.0-linux-amd64.tar.gz
tar -zxvf helm-v3.2.0-linux-amd64.tar.gz
mv linux-amd64/helm /usr/local/bin/helm
 
# 添加 Helm Chart 仓库
helm repo add rancher-stable> https://releases.rancher.com/server-charts/stable

curl -sfL https://docs.rancher.cn/k3s/k3s-install.sh | INSTALL_K3S_MIRROR=cn sh -s - server \
--datastore-endpoint="mysql://username:password@tcp(hostname:3306)/database-name"

# 执行以下命令，看大两个具有master角色节点表示集群正常
sudo k3s kubectl get nodes
 
sudo k3s kubectl get pods --all-namespaces

cp /etc/rancher/k3s/k3s.yaml  ~/.kube/config/

apiVersion: v1
clusters:
- cluster:
    certificate-authority-data: [CERTIFICATE-DATA]
    server: [LOAD-BALANCER-DNS]:6443 # 编辑此行
  name: default
contexts:
- context:
    cluster: default
    user: default
  name: default
current-context: default
kind: Config
preferences: {}
users:
- name: default
  user:
    password: [PASSWORD]
    username: admin

sudo kubectl get pods --all-namespaces

kubectl create namespace cattle-system

helm install rancher rancher-<CHART_REPO>/rancher \
 --namespace cattle-system \
 --set tls=external

kubectl -n cattle-system rollout status deploy/rancher
Waiting for deployment "rancher" rollout to finish: 0 of 3 updated replicas are available...
deployment "rancher" successfully rolled out

kubectl -n cattle-system get deploy rancher
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
rancher 3 3 3 3 3m