lvmd

package
v0.14.0 Latest Latest
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 Go to latest Published: Apr 15, 2025 License: Apache-2.0 Imports: 11 Imported by: 0

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Functions

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Types

type Lvm2 

type Lvm2 interface {
	// PVCheck 检查pv是否存在
	PVCheck(dev string) (string, error)
	PVCreate(dev string) error
	PVRemove(dev string) error
	PVResize(dev string) error
	// PVS 列出pv列表
	PVS() ([]api.PVInfo, error)
	// PVScan 扫描pv加入cache,在服务启动时执行
	PVScan(dev string) error
	PVDisplay(dev string) (*api.PVInfo, error)

	VGCheck(vg string) error
	VGCreate(vg string, tags, pvs []string) error
	VGRemove(vg string) error
	VGS() ([]api.VgGroup, error)
	VGDisplay(vg string) (*api.VgGroup, error)
	VGScan(vg string) error
	// VGExtend vg卷组增加新的pv
	VGExtend(vg, pv string) error
	// VGReduce vg卷组安全移除pv
	VGReduce(vg, pv string) error

	// 快照占用的是池子剩余的容量
	CreateThinPool(lv, vg string, size uint64) error
	ResizeThinPool(lv, vg string, size uint64) error
	DeleteThinPool(lv, vg string) error
	LVCreateFromPool(lv, thin, vg string, size uint64) error
	LVCreateFromVG(lv, vg string, size uint64, tags []string, stripe uint, stripeSize string) error
	LVRemove(lv, vg string) error
	LVResize(lv, vg string, size uint64) error
	LVDisplay(lv, vg string) (*types.LvInfo, error)
	// LVS 这个方法会频繁调用
	LVS(lvName string) ([]types.LvInfo, error)

	// CreateSnapshot 快照占用Pool空间，要有足够对池空间才能创建快照，不然会导致数据损坏
	CreateSnapshot(snap, lv, vg string) error
	DeleteSnapshot(snap, vg string) error
	// RestoreSnapshot 恢复快照会导致此快照消失
	RestoreSnapshot(snap, vg string) error

	// StartLvm2 启动必要的lvm2服务
	StartLvm2() error
	// RemoveUnknownDevice 清理unknown设备
	RemoveUnknownDevice(vg string) error
}

type Lvm2Implement 

type Lvm2Implement struct {
	Executor exec.Executor
}

func (*Lvm2Implement) CreateSnapshot 

func (lv2 *Lvm2Implement) CreateSnapshot(snap, lv, vg string) error

CreateSnapshot lvcreate -s v1/m2 -n snaph-m1 -ay -Ky

func (*Lvm2Implement) CreateThinPool 

func (lv2 *Lvm2Implement) CreateThinPool(lv, vg string, size uint64) error

CreateThinPool lvcreate -T v1/t5 --size 2g

func (*Lvm2Implement) DeleteSnapshot 

func (lv2 *Lvm2Implement) DeleteSnapshot(snap, vg string) error

DeleteSnapshot

func (*Lvm2Implement) DeleteThinPool 

func (lv2 *Lvm2Implement) DeleteThinPool(lv, vg string) error

DeleteThinPool lvremove v1/t3

func (*Lvm2Implement) LVCreateFromPool 

func (lv2 *Lvm2Implement) LVCreateFromPool(lv, thin, vg string, size uint64) error

func (*Lvm2Implement) LVCreateFromVG 

func (lv2 *Lvm2Implement) LVCreateFromVG(lv, vg string, size uint64, tags []string, stripe uint, stripeSize string) error

LVCreateFromVG LVCreate creates logical volume in this volume group. name is a name of creating volume. size is volume size in bytes. volTags is a list of tags to add to the volume.

func (*Lvm2Implement) LVDisplay 

func (lv2 *Lvm2Implement) LVDisplay(lv, vg string) (*types.LvInfo, error)

LVDisplay lvdisplay v1/m2

func (*Lvm2Implement) LVRemove 

func (lv2 *Lvm2Implement) LVRemove(lv, vg string) error

func (*Lvm2Implement) LVResize 

func (lv2 *Lvm2Implement) LVResize(lv, vg string, size uint64) error

LVResize lvresize -L 2g v1/m2

func (*Lvm2Implement) LVS 

func (lv2 *Lvm2Implement) LVS(lvName string) ([]types.LvInfo, error)

LVS

lvs -o lv_name,lv_path,lv_size,lv_kernel_major,lv_kernel_minor,origin,origin_size,pool_lv,thin_count,lv_tags --noheadings --separator=, --units=b --nosuffix --unbuffered --nameprefixes 

LVM2_LV_NAME='t1',LVM2_LV_PATH='/dev/v1/t1',LVM2_LV_SIZE='1073741824',LVM2_LV_KERNEL_MAJOR='252',LVM2_LV_KERNEL_MINOR='0',LVM2_ORIGIN='',LVM2_ORIGIN_SIZE='',LVM2_POOL_LV='',LVM2_THIN_COUNT='',LVM2_LV_TAGS='t1'
LVM2_LV_NAME='t5',LVM2_LV_PATH='',LVM2_LV_SIZE='6979321856',LVM2_LV_KERNEL_MAJOR='252',LVM2_LV_KERNEL_MINOR='3',LVM2_ORIGIN='',LVM2_ORIGIN_SIZE='',LVM2_POOL_LV='',LVM2_THIN_COUNT='1',LVM2_LV_TAGS=''
LVM2_LV_NAME='m2',LVM2_LV_PATH='/dev/v1/m2',LVM2_LV_SIZE='2147483648',LVM2_LV_KERNEL_MAJOR='252',LVM2_LV_KERNEL_MINOR='5',LVM2_ORIGIN='',LVM2_ORIGIN_SIZE='',LVM2_POOL_LV='t5',LVM2_THIN_COUNT='',LVM2_LV_TAGS=''

func (*Lvm2Implement) PVCheck 

func (lv2 *Lvm2Implement) PVCheck(dev string) (string, error)

func (*Lvm2Implement) PVCreate 

func (lv2 *Lvm2Implement) PVCreate(dev string) error

func (*Lvm2Implement) PVDisplay 

func (lv2 *Lvm2Implement) PVDisplay(dev string) (*api.PVInfo, error)

PVDisplay

pvdisplay /dev/loop4 

--- Physical volume ---
PV Name               /dev/loop4
VG Name               v1
PV Size               15.00 GiB / not usable 4.00 MiB
Allocatable           yes
PE Size               4.00 MiB
Total PE              3839
Free PE               3839
Allocated PE          0
PV UUID               OiNoxD-Y1sw-FSzi-mqPN-07EW-C77P-TNdtc6

func (*Lvm2Implement) PVRemove 

func (lv2 *Lvm2Implement) PVRemove(dev string) error

func (*Lvm2Implement) PVResize 

func (lv2 *Lvm2Implement) PVResize(dev string) error

func (*Lvm2Implement) PVS 

func (lv2 *Lvm2Implement) PVS() ([]api.PVInfo, error)

PVS 示例输出 pvs --noheadings --separator=, --units=b --nosuffix --unbuffered --nameprefixes LVM2_PV_NAME='/dev/loop2',LVM2_VG_NAME='lvmvg',LVM2_PV_FMT='lvm2',LVM2_PV_ATTR='a--',LVM2_PV_SIZE='16101933056',LVM2_PV_FREE='16101933056'

func (*Lvm2Implement) PVScan 

func (lv2 *Lvm2Implement) PVScan(dev string) error

PVScan runs the `pvscan --cache <dev>` command. It scans for the device at `dev` and adds it to the LVM metadata cache if `lvmetad` is running. If `dev` is an empty string, it scans all devices.

func (*Lvm2Implement) PVWipefs added in v0.12.0 

func (lv2 *Lvm2Implement) PVWipefs(dev string) error

func (*Lvm2Implement) RemoveUnknownDevice 

func (lv2 *Lvm2Implement) RemoveUnknownDevice(vg string) error

func (*Lvm2Implement) ResizeThinPool 

func (lv2 *Lvm2Implement) ResizeThinPool(lv, vg string, size uint64) error

ResizeThinPool lvresize -f -L 6g v1/t5

func (*Lvm2Implement) RestoreSnapshot 

func (lv2 *Lvm2Implement) RestoreSnapshot(snap, vg string) error

RestoreSnapshot 测试 mkfs -t ext4 /dev/v1/m2 mount /dev/v1/m2 /mnt && touch /mnt/1 && touch /mnt/2 && ls lvcreate -s v1/m2 -n snap-m1 -ay -Ky touch /mnt/3 && touch /mnt/4 umount /mnt lvconvert --merge v1/snap-m1 mount /dev/v1/m2 /mnt && ls /mnt

func (*Lvm2Implement) StartLvm2 

func (lv2 *Lvm2Implement) StartLvm2() error

func (*Lvm2Implement) VGCheck 

func (lv2 *Lvm2Implement) VGCheck(vg string) error

func (*Lvm2Implement) VGCreate 

func (lv2 *Lvm2Implement) VGCreate(vg string, tags, pvs []string) error

VGCreate vgcreate --add-tag=v1 v1 /dev/loop4

func (*Lvm2Implement) VGDisplay 

func (lv2 *Lvm2Implement) VGDisplay(vg string) (*api.VgGroup, error)

func (*Lvm2Implement) VGExtend 

func (lv2 *Lvm2Implement) VGExtend(vg, pv string) error

func (*Lvm2Implement) VGReduce 

func (lv2 *Lvm2Implement) VGReduce(vg, pv string) error

VGReduce

vgs 

VG    #PV #lv2.#SN Attr   VSize  VFree
lvmvg   1   0   0 wz--n- 15.00g 15.00g
v1      2   0   0 wz--n- 29.99g 29.99g

pvs 

PV         VG    Fmt  Attr PSize  PFree
/dev/loop2 lvmvg lvm2 a--  15.00g 15.00g
/dev/loop4 v1    lvm2 a--  15.00g 15.00g
/dev/loop5 v1    lvm2 a--  15.00g 15.00g

pvmove /dev/loop5 

No data to move for v1

vgreduce v1 /dev/loop5 

Removed "/dev/loop5" from volume group "v1"

pvremove /dev/loop5 

Labels on physical volume "/dev/loop5" successfully wiped

pvs 

PV         VG    Fmt  Attr PSize  PFree
/dev/loop2 lvmvg lvm2 a--  15.00g 15.00g
/dev/loop4 v1    lvm2 a--  15.00g 15.00g

func (*Lvm2Implement) VGRemove 

func (lv2 *Lvm2Implement) VGRemove(vg string) error

func (*Lvm2Implement) VGS 

func (lv2 *Lvm2Implement) VGS() ([]api.VgGroup, error)

VGS 示例 vgs --noheadings --separator=, --units=b --nosuffix --unbuffered --nameprefixes LVM2_VG_NAME='lvmvg',LVM2_PV_COUNT='1',LVM2_LV_COUNT='0',LVM2_SNAP_COUNT='0',LVM2_VG_ATTR='wz--n-',LVM2_VG_SIZE='16101933056',LVM2_VG_FREE='16101933056' LVM2_VG_NAME='v1',LVM2_PV_COUNT='2',LVM2_LV_COUNT='0',LVM2_SNAP_COUNT='0',LVM2_VG_ATTR='wz--n-',LVM2_VG_SIZE='32203866112',LVM2_VG_FREE='32203866112'

func (*Lvm2Implement) VGScan 

func (lv2 *Lvm2Implement) VGScan(vg string) error

VGScan runs the `vgscan --cache <name>` command. It scans for the volume group and adds it to the LVM metadata cache if `lvmetad` is running. If `name` is an empty string, it scans all volume groups.

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