1.安装helm

#master节点安装
yum -y install wget
wget https://get.helm.sh/helm-v3.6.3-linux-amd64.tar.gz #下载
scp helm-v3.6.3-linux-amd64.tar.gz ip:/root #复制到其他服务器

2、解压并分发其他给机器 （如果没有做高可用则不需要分发）

tar -xf helm-v3.6.3-linux-amd64.tar.gz 
cp linux-amd64/helm  /usr/local/bin/

mkdir -p $HOME/.cache/helm
mkdir -p  $HOME/.config/helm
mkdir -p $HOME/.local/share/helm
helm version

3.配置基础环境

安装longhorn存储控制器需要用到iSCSI工具，所以需要在k8s所有节点上安装

##所有节点上安装
yum -y install iscsi-initiator-utils

4.安装longhorn

4.0 node所有节点拉去镜像，方便部署速度

docker pull longhornio/csi-attacher:v3.4.0
docker pull longhornio/csi-provisioner:v2.1.2
docker pull longhornio/csi-resizer:v1.3.0
docker pull longhornio/longhorn-engine:v1.4.2
docker pull longhornio/longhorn-instance-manager:v1.4.2
docker pull longhornio/csi-node-driver-registrar:v2.5.0
docker pull longhornio/longhorn-manager:v1.4.2
docker pull longhornio/longhorn-ui:v1.4.2

4.1配置helm镜像源

##master上操作
helm repo add longhorn https://charts.longhorn.io
helm repo update

4.2安装longhorn

kubectl create namespace longhorn-system  #创建命名空间，把longhorn的所有pod都放这个里面
helm search repo longhorn
helm install longhorn longhorn/longhorn -n longhorn-system
##helm uninstall longhorn longhorn/longhorn -n longhorn-system #卸载

4.3查看helm安装的chart包

helm list -A

4.4查看pod状态

kubectl get pod -n longhorn-system

[root@master ~]# kubectl get pod -n longhorn-system -o wide #全部是 Running和状态READY左右两边一致就可以了
NAME                                                  READY   STATUS    RESTARTS       AGE     IP               NODE    NOMINATED NODE   READINESS GATES
csi-attacher-7bf4b7f996-ffhxm                         1/1     Running   0              45m     10.244.166.146   node1   <none>           <none>
csi-attacher-7bf4b7f996-kts4l                         1/1     Running   0              45m     10.244.104.20    node2   <none>           <none>
csi-attacher-7bf4b7f996-vtzdb                         1/1     Running   0              45m     10.244.166.142   node1   <none>           <none>
csi-provisioner-869bdc4b79-bjf8q                      1/1     Running   0              45m     10.244.166.150   node1   <none>           <none>
csi-provisioner-869bdc4b79-m2swk                      1/1     Running   0              45m     10.244.104.18    node2   <none>           <none>
csi-provisioner-869bdc4b79-pmkfq                      1/1     Running   0              45m     10.244.166.143   node1   <none>           <none>
csi-resizer-869fb9dd98-6ndgb                          1/1     Running   0              8m47s   10.244.104.28    node2   <none>           <none>
csi-resizer-869fb9dd98-czvzh                          1/1     Running   0              45m     10.244.104.16    node2   <none>           <none>
csi-resizer-869fb9dd98-pq2p5                          1/1     Running   0              45m     10.244.166.149   node1   <none>           <none>
csi-snapshotter-7d59d56b5c-85cr6                      1/1     Running   0              45m     10.244.104.19    node2   <none>           <none>
csi-snapshotter-7d59d56b5c-dlwjk                      1/1     Running   0              45m     10.244.166.148   node1   <none>           <none>
csi-snapshotter-7d59d56b5c-xsc6s                      1/1     Running   0              45m     10.244.166.147   node1   <none>           <none>
engine-image-ei-f9e7c473-ld6zp                        1/1     Running   0              46m     10.244.104.15    node2   <none>           <none>
engine-image-ei-f9e7c473-qw96n                        1/1     Running   1 (6m5s ago)   8m13s   10.244.166.154   node1   <none>           <none>
instance-manager-e-16be548a213303f54febe8742dc8e307   1/1     Running   0              8m19s   10.244.104.29    node2   <none>           <none>
instance-manager-e-1e8d2b6ac4bdab53558aa36fa56425b5   1/1     Running   0              7m58s   10.244.166.155   node1   <none>           <none>
instance-manager-r-16be548a213303f54febe8742dc8e307   1/1     Running   0              46m     10.244.104.14    node2   <none>           <none>
instance-manager-r-1e8d2b6ac4bdab53558aa36fa56425b5   1/1     Running   0              7m31s   10.244.166.156   node1   <none>           <none>
longhorn-admission-webhook-69979b57c4-rt7rh           1/1     Running   0              52m     10.244.166.136   node1   <none>           <none>
longhorn-admission-webhook-69979b57c4-s2bmd           1/1     Running   0              52m     10.244.104.11    node2   <none>           <none>
longhorn-conversion-webhook-966d775f5-st2ld           1/1     Running   0              52m     10.244.166.135   node1   <none>           <none>
longhorn-conversion-webhook-966d775f5-z5m4h           1/1     Running   0              52m     10.244.104.12    node2   <none>           <none>
longhorn-csi-plugin-gcngb                             3/3     Running   0              45m     10.244.166.145   node1   <none>           <none>
longhorn-csi-plugin-z4pr6                             3/3     Running   0              45m     10.244.104.17    node2   <none>           <none>
longhorn-driver-deployer-5d74696c6-g2p7p              1/1     Running   0              52m     10.244.104.9     node2   <none>           <none>
longhorn-manager-j69pn                                1/1     Running   0              52m     10.244.166.139   node1   <none>           <none>
longhorn-manager-rnzwr                                1/1     Running   0              52m     10.244.104.10    node2   <none>           <none>
longhorn-recovery-backend-6576b4988d-l4lmb            1/1     Running   0              52m     10.244.104.8     node2   <none>           <none>
longhorn-recovery-backend-6576b4988d-v79b4            1/1     Running   0              52m     10.244.166.138   node1   <none>           <none>
longhorn-ui-596d5f6876-ms4dn                          1/1     Running   0              52m     10.244.166.137   node1   <none>           <none>
longhorn-ui-596d5f6876-td7ww                          1/1     Running   0              52m     10.244.104.7     node2   <none>           <none>
[root@master ~]# 

4.5设置svc服务

kubectl get svc -n longhorn-system

[root@master ~]# kubectl get svc -n longhorn-system|grep longhorn-frontend #过滤出来
longhorn-frontend             ClusterIP   10.106.154.54    <none>        80/TCP      55m
[root@master ~]# 

##安装好后名为longhorn-frontend的svc服务默认是clusterip模式，
##除了集群之外的网络是访问不到此服务的，所以要将此svc服务改为nodeport模式
kubectl edit svc longhorn-frontend -n longhorn-system
##type: NodePort    
#将type的ClusterIP改为NodePort即可，保存退出

[root@master ~]# kubectl get svc -n longhorn-system|grep longhorn-frontend #查询刚才变更为NodePort暴露的端口
longhorn-frontend             NodePort    10.106.154.54    <none>        80:32146/TCP   58m
[root@master ~]# 

5.在浏览器访问此端口即可

 http://ip:32146  #根据自己的k8s宿主机ip地址输入