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chore: refactor vgmanager into different interfaces and introduce tests
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,132 @@ | ||
| /* | ||
| Copyright © 2023 Red Hat, Inc. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package filter | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "strings" | ||
|
|
||
| "github.com/openshift/lvm-operator/pkg/lsblk" | ||
| "github.com/openshift/lvm-operator/pkg/lvm" | ||
| ) | ||
|
|
||
| const ( | ||
| // StateSuspended is a possible value of BlockDevice.State | ||
| StateSuspended = "suspended" | ||
|
|
||
| // DeviceTypeLoop is the device type for loop devices in lsblk output | ||
| DeviceTypeLoop = "loop" | ||
|
|
||
| // DeviceTypeROM is the device type for ROM devices in lsblk output | ||
| DeviceTypeROM = "rom" | ||
|
|
||
| // DeviceTypeLVM is the device type for lvm devices in lsblk output | ||
| DeviceTypeLVM = "lvm" | ||
|
|
||
| // filter names: | ||
| notReadOnly = "notReadOnly" | ||
| notSuspended = "notSuspended" | ||
| noBiosBootInPartLabel = "noBiosBootInPartLabel" | ||
| noReservedInPartLabel = "noReservedInPartLabel" | ||
| noValidFilesystemSignature = "noValidFilesystemSignature" | ||
| noBindMounts = "noBindMounts" | ||
| noChildren = "noChildren" | ||
| usableDeviceType = "usableDeviceType" | ||
| ) | ||
|
|
||
| type Filters map[string]func(lsblk.BlockDevice) (bool, error) | ||
|
|
||
| func DefaultFilters(lvm lvm.LVM, lsblkInstance lsblk.LSBLK) Filters { | ||
| return Filters{ | ||
| notReadOnly: func(dev lsblk.BlockDevice) (bool, error) { | ||
| return !dev.ReadOnly, nil | ||
| }, | ||
|
|
||
| notSuspended: func(dev lsblk.BlockDevice) (bool, error) { | ||
| matched := dev.State != StateSuspended | ||
| return matched, nil | ||
| }, | ||
|
|
||
| noBiosBootInPartLabel: func(dev lsblk.BlockDevice) (bool, error) { | ||
| biosBootInPartLabel := strings.Contains(strings.ToLower(dev.PartLabel), strings.ToLower("bios")) || | ||
| strings.Contains(strings.ToLower(dev.PartLabel), strings.ToLower("boot")) | ||
| return !biosBootInPartLabel, nil | ||
| }, | ||
|
|
||
| noReservedInPartLabel: func(dev lsblk.BlockDevice) (bool, error) { | ||
| reservedInPartLabel := strings.Contains(strings.ToLower(dev.PartLabel), "reserved") | ||
| return !reservedInPartLabel, nil | ||
| }, | ||
|
|
||
| noValidFilesystemSignature: func(dev lsblk.BlockDevice) (bool, error) { | ||
| // if no fs type is set, it's always okay | ||
| if dev.FSType == "" { | ||
| return true, nil | ||
| } | ||
|
|
||
| // if fstype is set to LVM2_member then it already was created as a PV | ||
| // this means that if the disk has no children, we can safely reuse it if it's a valid LVM PV. | ||
| if dev.FSType == "LVM2_member" && !dev.HasChildren() { | ||
| pvs, err := lvm.ListPVs("") | ||
| if err != nil { | ||
| return false, fmt.Errorf("could not determine if block device has valid filesystem signature, since it is flagged as LVM2_member but physical volumes could not be verified: %w", err) | ||
| } | ||
|
|
||
| for _, pv := range pvs { | ||
| // a volume is a valid PV if it has the same name as the block device and no associated volume group and has available disk space | ||
| // however if there is a PV that matches the Device and there is a VG associated with it or no available space, we cannot use it | ||
| if pv.PvName == dev.KName { | ||
| if pv.VgName == "" && pv.PvFree != "0G" { | ||
| return true, nil | ||
| } else { | ||
| return false, nil | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // if there was no PV that matched it and it still is flagged as LVM2_member, it is formatted but not recognized by LVM | ||
| // configuration. We can assume that in this case, the Volume can be reused by simply recalling the vgcreate command on it | ||
| return true, nil | ||
| } | ||
| return false, nil | ||
| }, | ||
|
|
||
| noChildren: func(dev lsblk.BlockDevice) (bool, error) { | ||
| hasChildren := dev.HasChildren() | ||
| return !hasChildren, nil | ||
| }, | ||
|
|
||
| noBindMounts: func(dev lsblk.BlockDevice) (bool, error) { | ||
| hasBindMounts, _, err := lsblkInstance.HasBindMounts(dev) | ||
| return !hasBindMounts, err | ||
| }, | ||
|
|
||
| usableDeviceType: func(dev lsblk.BlockDevice) (bool, error) { | ||
| switch dev.Type { | ||
| case DeviceTypeLoop: | ||
| // check loop device isn't being used by kubernetes | ||
| return lsblkInstance.IsUsableLoopDev(dev) | ||
| case DeviceTypeROM: | ||
| return false, nil | ||
| case DeviceTypeLVM: | ||
| return false, nil | ||
| default: | ||
| return true, nil | ||
| } | ||
| }, | ||
| } | ||
| } |
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