LVM CSI 插件可用于帮助简化存储管理. 使用 csi 配置创建 pv，并且 pvc、pod 像往常一样定义。
Lvm 是基于主机的，而不是您的应用程序的高可用性解决方案。使用 lvm 应该接受主机关闭的效果。
kubernetes 1.16+ 适配：阿里云ACK、华为云CCE、腾讯云TKE、移动云KCS
- 具有所需 RBAC 权限的服务帐户
- kubernetest version >= 1.20.0 ,
apiserver需要开启- --feature-gates=RemoveSelfLink=false特性
编译打包 local.csi.ecloud.cmss.com 可以编译成容器的形式。
构建容器：
$ docker build -f hack/local/Dockerfile .使用localdisk 或者 挂载clouddisk方式，挂载或生成 lvm pvcreate 或 lvm vgcreate
$ fdisk -l
Disk /dev/sdc: 68.7 GB, 68719476736 bytes, 134217728 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
$ fdisk /dev/sdc
Command (m for help): p
Disk /dev/sdc: 68.7 GB, 68719476736 bytes, 134217728 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x72a4d30c
Device Boot Start End Blocks Id System
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-134217727, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-134217727, default 134217727): 64217727
Partition 1 of type Linux and of size 30.6 GiB is set
Command (m for help): t
Selected partition 1
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'
Command (m for help): w
The partition table has been altered!
$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sdb 8:16 0 100G 0 disk
|-sdb4 8:20 0 25G 0 part
`-sdb2 8:18 0 75G 0 part
sr0 11:0 1 506K 0 rom
sdc 8:32 0 64G 0 disk
`-sdc1 8:33 0 30.6G 0 part
sda 8:0 0 100G 0 disk
`-sda1 8:1 0 100G 0 part /
$ pvcreate /dev/sdc1
Physical volume "/dev/sdc1" successfully created.
$ vgcreate volumegroup1 /dev/sdc1
Volume group "volumegroup1" successfully created
$ vgdisplay
--- Volume group ---
VG Name volumegroup1
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 2
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 1
Max PV 0
Cur PV 1
Act PV 1
VG Size <30.62 GiB
PE Size 4.00 MiB
Total PE 7838
Alloc PE / Size 512 / 2.00 GiB
Free PE / Size 7326 / <28.62 GiB
VG UUID V6TVTh-AcIi-hLmR-bozc-9QeA-EBnU-Mhhd6y第 1 步：创建 CSI Provisioner
$ kubectl create -f ./deploy/local/provisioner.yaml第 2 步：创建 CSI 插件
$ kubectl create -f ./deploy/local/plugin.yaml第 3 步：创建存储类
$ kubectl create -f ./examples/storageclass.yaml
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
name: csi-lvm
provisioner: local.csi.ecloud.cmss.com
parameters:
vgName: volumegroup1
fsType: ext4
pvType: localdisk
nodeAffinity: "false"
readIOPS: "2000"
writeIOPS: "1000"
readBPS: "10000"
writeBPS: "5000"
reclaimPolicy: Delete用法：
vgName：定义存储类的卷组名；fsType：默认为ext4，定义lvm文件系统类型，支持ext4、ext3、xfs；pvType：可选，默认为云盘。定义使用的物理磁盘类型，支持clouddisk、localdisk；nodeAffinity：可选，默认为true。决定是否在PV中添加nodeAffinity。true：默认，使用nodeAffinity配置创建PV；false：不配置nodeAffinity创建PV，pod可以调度到任意节点
volumeBindingMode：支持Immediate和WaitForFirstConsumerImmediate：表示将在创建pvc时配置卷，在此配置中nodeAffinity将可用；WaitForFirstConsumer：表示在相关的pod创建之前不会创建volume；在配置中，nodeAffinity将不可用；
第 4 步：使用 lvm 创建 nginx 部署
$ kubectl create -f ./examples/pvc.yaml
$ kubectl create -f ./examples/deploy.yaml第 5 步：检查 PVC/PV 的状态
$ kubectl get pvc
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
lvm-pvc Bound lvm-29def33c-8dae-482f-8d64-c45e741facd9 2Gi RWO csi-lvm 3h37m
$ kubectl get pv
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
lvm-29def33c-8dae-482f-8d64-c45e741facd9 2Gi RWO Delete Bound default/lvm-pvc csi-lvm 3h38m第 6 步：检查 pod 的状态
6.1 检查 pod 中的目录 & csi 日志
$ kubectl get pod | grep deployment-lvm
deployment-lvm-57bc9bcd64-j7r9x 1/1 Running 0 77s
$ kubectl exec -ti deployment-lvm-57bc9bcd64-j7r9x sh
kubectl exec [POD] [COMMAND] is DEPRECATED and will be removed in a future version. Use kubectl exec [POD] -- [COMMAND] instead.
# df -h | grep data
/dev/mapper/volumegroup1-lvm--9e30e658--5f85--4ec6--ada2--c4ff308b506e 2.0G 6.0M 1.8G 1% /data
$ kubectl logs csi-lvm-plugin-97j9w -n kube-system -c csi-lvmplugin
I1018 06:04:43.278422 178966 utils.go:98] GRPC request: {"staging_target_path":"/var/lib/kubelet/plugins/kubernetes.io/csi/pv/lvm-9e30e658-5f85-4ec6-ada2-c4ff308b506e/globalmount","target_path":"/var/lib/kubelet/pods/5a9403b9-b1ba-4ffe-acf0-2414086c5cf9/volumes/kubernetes.io~csi/lvm-9e30e658-5f85-4ec6-ada2-c4ff308b506e/mount","volume_capability":{"AccessType":{"Mount":{"fs_type":"ext4"}},"access_mode":{"mode":1}},"volume_context":{"fsType":"ext4","nodeAffinity":"false","pvType":"localdisk","readBPS":"10000","readIOPS":"2000","storage.kubernetes.io/csiProvisionerIdentity":"1665995111679-8081-local.csi.ecloud.cmss.com","vgName":"volumegroup1","writeBPS":"5000","writeIOPS":"1000"},"volume_id":"lvm-9e30e658-5f85-4ec6-ada2-c4ff308b506e"}
time="2022-10-18T06:04:43Z" level=info msg="Mount /dev/volumegroup1/lvm-9e30e658-5f85-4ec6-ada2-c4ff308b506e to /var/lib/kubelet/pods/5a9403b9-b1ba-4ffe-acf0-2414086c5cf9/volumes/kubernetes.io~csi/lvm-9e30e658-5f85-4ec6-ada2-c4ff308b506e/mount with fsType ext4, the command is mount [-t ext4 -o rw /dev/volumegroup1/lvm-9e30e658-5f85-4ec6-ada2-c4ff308b506e /var/lib/kubelet/pods/5a9403b9-b1ba-4ffe-acf0-2414086c5cf9/volumes/kubernetes.io~csi/lvm-9e30e658-5f85-4ec6-ada2-c4ff308b506e/mount]"
time="2022-10-18T06:04:43Z" level=info msg="Seccessful Set Volume(lvm-9e30e658-5f85-4ec6-ada2-c4ff308b506e) IO Limit: readIOPS(2000), writeIOPS(1000), readBPS(10000), writeBPS(5000)"
time="2022-10-18T06:04:43Z" level=info msg="NodePublishVolume:: mount successful devicePath: /dev/volumegroup1/lvm-9e30e658-5f85-4ec6-ada2-c4ff308b506e, targetPath: /var/lib/kubelet/pods/5a9403b9-b1ba-4ffe-acf0-2414086c5cf9/volumes/kubernetes.io~csi/lvm-9e30e658-5f85-4ec6-ada2-c4ff308b506e/mount, options: [rw]"
6.2 检查主机中的目录：
$ kubectl describe pod deployment-lvm-57bc9bcd64-j7r9x | grep Node:
Node: kcs-cpu-test-m-8mzmj/172.16.0.67
$ ifconfig | grep 172.16.0.67
inet 172.16.0.67 netmask 255.255.0.0 broadcast 172.16.255.255
$ mount | grep volumegroup
/dev/mapper/volumegroup1-lvm--9e30e658--5f85--4ec6--ada2--c4ff308b506e on /var/lib/kubelet/pods/c06d5521-3d9c-4517-bdc2-e6df34b9e8f1/volumes/kubernetes.io~csi/lvm-9e30e658-5f85-4ec6-ada2-c4ff308b506e/mount type ext4 (rw,relatime,data=ordered)
/dev/mapper/volumegroup1-lvm--9e30e658--5f85--4ec6--ada2--c4ff308b506e on /var/lib/paascontainer/kubelet/pods/c06d5521-3d9c-4517-bdc2-e6df34b9e8f1/volumes/kubernetes.io~csi/lvm-9e30e658-5f85-4ec6-ada2-c4ff308b506e/mount type ext4 (rw,relatime,data=ordered)6.3 检查pod disk iops和bps设置，是否生效：
$ pwd
/sys/fs/cgroup/blkio/kubepods.slice/kubepods-besteffort.slice/kubepods-besteffort-podc06d5521_3d9c_4517_bdc2_e6df34b9e8f1.slice
$ cat blkio.throttle.read_bps_device
253:1 10000
$ cat blkio.throttle.write_bps_device
253:1 5000
$ cat blkio.throttle.write_iops_device
253:1 1000
$ cat blkio.throttle.read_iops_device
253:1 2000