Class: MiqVolumeManager

Inherits:
Object
  • Object
show all
Defined in:
lib/VolumeManager/MiqVolumeManager.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(pVols) ⇒ MiqVolumeManager

Returns a new instance of MiqVolumeManager.



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# File 'lib/VolumeManager/MiqVolumeManager.rb', line 58

def initialize(pVols)
  @logicalVolumes     = []         # visible logical volumes
  @physicalVolumes    = []         # visible physical volumes
  @hiddenVolumes      = []         # hidded volumes (in volume groups)
  @allPhysicalVolumes = []         # all physical volumes
  @vgHash             = nil               # volume groups hashed by name
  @rootTrees          = nil               # the MiqMountManager objects using this MiqVolumeManager object
  @vdlConnection      = nil               # connection for remote vmdk access.

  lvmPvHdrHash = {}                 # physical volume header list, for lvm
  pVols.each do |pv|
    pvh = LdmScanner.scan(pv) || Lvm2Scanner.labelScan(pv)
    if pvh
      pvh.diskObj = pv                # add reference to the pv's open disk object to the pv header
      lvmPvHdrHash[pvh.pv_uuid] = pvh # this physical volume in an LVM volume group
      @hiddenVolumes << pv            # so it's a hidden volume
      $log.info "MiqVolumeManager: #{pvh.lvm_type} metadata detected on PV: #{pv.dInfo.fileName}, partition: #{pv.partNum}"
    else
      @physicalVolumes << pv          # this physical volume is not in an LVM volume group
      $log.debug "MiqVolumeManager: No LVM metadata detected on PV: #{pv.dInfo.fileName}, partition: #{pv.partNum}"
    end
    @allPhysicalVolumes << pv
  end

  @vgHash = {}
  parseLvmMetadata(lvmPvHdrHash)
  parseLvmThinMetadata
  @vgHash.each_value { |vg| @logicalVolumes.concat(vg.getLvs) }

  @lvHash = {}
  @logicalVolumes.each do |lvdObj|
    lv    = lvdObj.dInfo.lvObj
    lvName  = lv.lvName
    vgName  = lv.vgObj.vgName

    @lvHash["/dev/#{vgName}/#{lvName}"] = lvdObj
  end

  @visibleVolumes = @logicalVolumes + @physicalVolumes
end

Instance Attribute Details

#allPhysicalVolumes ⇒ Object (readonly)

Returns the value of attribute allPhysicalVolumes.



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# File 'lib/VolumeManager/MiqVolumeManager.rb', line 11

def allPhysicalVolumes
  @allPhysicalVolumes
end

#diskFileNames ⇒ Object (readonly)

Returns the value of attribute diskFileNames.



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# File 'lib/VolumeManager/MiqVolumeManager.rb', line 11

def diskFileNames
  @diskFileNames
end

#hiddenVolumes ⇒ Object (readonly)

Returns the value of attribute hiddenVolumes.



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# File 'lib/VolumeManager/MiqVolumeManager.rb', line 11

def hiddenVolumes
  @hiddenVolumes
end

#logicalVolumes ⇒ Object (readonly)

Returns the value of attribute logicalVolumes.



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# File 'lib/VolumeManager/MiqVolumeManager.rb', line 11

def logicalVolumes
  @logicalVolumes
end

#lvHash ⇒ Object (readonly)

Returns the value of attribute lvHash.



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# File 'lib/VolumeManager/MiqVolumeManager.rb', line 11

def lvHash
  @lvHash
end

#physicalVolumes ⇒ Object (readonly)

Returns the value of attribute physicalVolumes.



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# File 'lib/VolumeManager/MiqVolumeManager.rb', line 11

def physicalVolumes
  @physicalVolumes
end

#rootTrees ⇒ Object

Returns the value of attribute rootTrees.



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# File 'lib/VolumeManager/MiqVolumeManager.rb', line 10

def rootTrees
  @rootTrees
end

#vgHash ⇒ Object (readonly)

Returns the value of attribute vgHash.



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# File 'lib/VolumeManager/MiqVolumeManager.rb', line 11

def vgHash
  @vgHash
end

#visibleVolumes ⇒ Object (readonly)

Returns the value of attribute visibleVolumes.



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# File 'lib/VolumeManager/MiqVolumeManager.rb', line 11

def visibleVolumes
  @visibleVolumes
end

Class Method Details

.fromNativePvs ⇒ Object 



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# File 'lib/VolumeManager/MiqVolumeManager.rb', line 13

def self.fromNativePvs
  return nil unless Sys::Platform::IMPL == :linux

  msg_pfx = "MiqVolumeManager.fromNativePvs"

  bdevs = `pvdisplay -c | cut -d: -f1`.tr(" \t", "").split("\n")
  ldevs = `lvdisplay -c | cut -d: -f1`.tr(" \t", "").split("\n")
  bdevs -= ldevs
  bda = []

  bdevs.each do |bd|
    next if bd == "unknowndevice"
    $log.debug "#{msg_pfx}: Opening PV = #{bd}"

    diskInfo = OpenStruct.new
    diskInfo.rawDisk = true
    diskInfo.fileName = bd

    begin
      disk = MiqDisk.new(RawDisk, diskInfo, 0)
    rescue StandardError, NoMemoryError, SignalException => err
      $log.warn "#{msg_pfx}: Could not open PV: #{bd}"
      $log.warn err.to_s
      $log.debug err.backtrace.join("\n")
      next
    end

    raise "#{msg_pfx}: Failed to open disk: #{diskInfo.fileName}" unless disk
    bda << disk

    if $log.debug?
      $log.debug "#{msg_pfx}: Block device: #{bd}"
      $log.debug "#{msg_pfx}: \tDisk type: #{disk.diskType}"
      $log.debug "#{msg_pfx}: \tDisk partition type: #{disk.partType}"
      $log.debug "#{msg_pfx}: \tDisk block size: #{disk.blockSize}"
      $log.debug "#{msg_pfx}: \tDisk start LBA: #{disk.lbaStart}"
      $log.debug "#{msg_pfx}: \tDisk end LBA: #{disk.lbaEnd}"
      $log.debug "#{msg_pfx}: \tDisk start byte: #{disk.startByteAddr}"
      $log.debug "#{msg_pfx}: \tDisk end byte: #{disk.endByteAddr}"
    end
  end

  new(bda)
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/VolumeManager/MiqVolumeManager.rb', line 99

def close
  $log.info "MiqVolumeManager.close called"
  @logicalVolumes     = @logicalVolumes.clear
  @physicalVolumes    = @physicalVolumes.clear
  @hiddenVolumes      = @hiddenVolumes.clear
  @vgHash             = nil
end

#closeAll ⇒ Object 



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# File 'lib/VolumeManager/MiqVolumeManager.rb', line 117

def closeAll
  $log.info "MiqVolumeManager.closeAll called"
  closePvols
  close
end

#closePvols ⇒ Object

Physical volumes are opened by the client, so the client should be responsible for closing them. These methods are provided as a convienience when the volume manager is instantiated through fromNativePvs().



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# File 'lib/VolumeManager/MiqVolumeManager.rb', line 112

def closePvols
  @allPhysicalVolumes.each(&:close)
  @allPhysicalVolumes.clear
end

#lvToXml(doc = nil) ⇒ Object 



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# File 'lib/VolumeManager/MiqVolumeManager.rb', line 215

def lvToXml(doc = nil)
  doc = MiqXml.createDoc(nil) unless doc

  lvs = doc.add_element 'logical'
  @logicalVolumes.each do |dobj|
    lvObj = dobj.dInfo.lvObj
    name = lvObj.driveHint.blank? ? lvObj.lvName : lvObj.driveHint
    lv = lvs.add_element('volume',               "name"         => name,
                                                 "type"         => dobj.diskType,
                                                 "size"         => dobj.size,
                                                 "uid"          => lvObj.lvId,
                                                 "volume_group" => lvObj.vgObj.vgName,
                                                 "drive_hint"   => lvObj.driveHint,
                                                 "volume_name"  => lvObj.lvName,)

    if @rootTrees && @rootTrees.length > 0
      fs = @rootTrees[0].fileSystems.find { |f| f.fs.dobj.dInfo.lvObj && f.fs.dobj.dInfo.lvObj.lvName == lvObj.lvName }
      unless fs.nil?
        lv.add_attributes("filesystem" => fs.fs.fsType,
                          "free_space" => fs.fs.freeBytes,
                          "used_space" => dobj.size - fs.fs.freeBytes)
      end
    end
  end
  doc
end

#parseLvmMetadata(pvHdrs) ⇒ Object 



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# File 'lib/VolumeManager/MiqVolumeManager.rb', line 123

def parseLvmMetadata(pvHdrs)
  pvHdrs.each_value do |pvh|
    if pvh.lvm_type == "LVM2"
      $log.debug "MiqVolumeManager.parseLvmMetadata: parsing LVM2 metadata"
      pvh.mdList.each do |md|
        Lvm2MdParser.dumpMetadata(md) if $log.debug?
        parser = Lvm2MdParser.new(md, pvHdrs)
        next if @vgHash[parser.vgName]
        @vgHash[parser.vgName] = parser.parse
        # @vgHash[parser.vgName].dump
      end
    elsif pvh.lvm_type == "LDM"
      $log.debug "MiqVolumeManager.parseLvmMetadata: parsing LDM metadata"
      parser = LdmMdParser.new(pvh, pvHdrs)
      next if @vgHash[parser.vgName]
      @vgHash[parser.vgName] = parser.parse
    else
      $log.debug "MiqVolumeManager.parseLvmMetadata: unknown metadata type #{pvh.lvm_type}"
      next
    end
  end
end

#parseLvmThinMetadata ⇒ Object 



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# File 'lib/VolumeManager/MiqVolumeManager.rb', line 146

def parseLvmThinMetadata
  @vgHash.each do |vgname, vg|
    $log.debug "MiqVolumeManager.parseLvmThinMetadata: setting LVM2 thin metadata"

    vg.thin_volumes.each do |tv|
      tv.thin_segments.each do |seg|
        seg.set_thin_pool_volume vg.logicalVolumes.values
      end
    end

    vg.thin_pool_volumes.each do |tpv|
      tpv.thin_pool_segments.each do |seg|
        seg.set_metadata_volume vg.logicalVolumes.values
        seg.set_data_volume     vg.logicalVolumes.values
      end
    end
  end
end

#pvToXml(doc = nil, hidden = false) ⇒ Object 



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# File 'lib/VolumeManager/MiqVolumeManager.rb', line 176

def pvToXml(doc = nil, hidden = false)
  doc = MiqXml.createDoc(nil) unless doc

  if hidden
    vols = @hiddenVolumes
    volType = 'hidden'
  else
    vols = @physicalVolumes
    volType = 'physical'
  end

  pvs = doc.add_element volType
  vols.each do |dobj|
    pv = pvs.add_element('volume',               "controller"        => dobj.hwId,
                                                 "disk_type"         => dobj.diskType,
                                                 "location"          => dobj.partNum,
                                                 "partition_type"    => dobj.partType,
                                                 "size"              => dobj.size,
                                                 "virtual_disk_file" => dobj.dInfo.fileName,
                                                 "start_address"     => dobj.startByteAddr,)
    if @rootTrees && @rootTrees.length > 0
      pv.add_attribute("name", @rootTrees[0].osNames[dobj.hwId].to_s) if @rootTrees[0].osNames

      fs = @rootTrees[0].fileSystems.find { |f| f.fs.dobj.hwId == dobj.hwId }
      unless fs.nil?
        pv.add_attributes("filesystem" => fs.fs.fsType,
                          "free_space" => fs.fs.freeBytes,
                          "used_space" => dobj.size - fs.fs.freeBytes)
      end
    end

    if dobj.pvObj
      pv.add_attributes("volume_group" => dobj.pvObj.vgObj.vgName,
                        "uid"          => dobj.pvObj.pvId)
    end
  end
  doc
end

#toXml(doc = nil) ⇒ Object 



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# File 'lib/VolumeManager/MiqVolumeManager.rb', line 165

def toXml(doc = nil)
  doc = MiqXml.createDoc(nil) unless doc

  vi = doc.add_element 'volumes'
  pvToXml(vi, false)
  pvToXml(vi, true)
  lvToXml(vi)
  vgToXml(vi)
  doc
end

#vgToXml(doc = nil) ⇒ Object 



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# File 'lib/VolumeManager/MiqVolumeManager.rb', line 242

def vgToXml(doc = nil)
  doc = MiqXml.createDoc(nil) unless doc

  vgs = doc.add_element 'volume_groups'
  @vgHash.each do |vgn, vgo|
    pext = 0
    lext = 0

    vg = vgs.add_element('volume_group', {"name" => vgn})

    pvs = vg.add_element 'physical'
    vgo.physicalVolumes.each do |pvn, pvo|
      pvs.add_element('volume', "name"              => pvn,
                                "uid"               => pvo.pvId,
                                "controller"        => pvo.diskObj.hwId,
                                "os_name"           => pvo.device,
                                "physical_extents"  => pvo.peCount,
                                "virtual_disk_file" => pvo.diskObj.dInfo.fileName)
      pext += pvo.peCount
    end

    lvs = vg.add_element 'logical'
    vgo.logicalVolumes.each do |lvn, lvo|
      lvs.add_element('volume', "name" => lvn,
                                "uid"  => lvo.lvId)
      lvo.segments.each { |s| lext += s.extentCount }
    end

    vg.add_attributes("extent_size"      => vgo.extentSize,
                      "physical_extents" => pext,
                      "logical_extents"  => lext,
                      "free_extents"     => pext - lext)
  end if @vgHash
  doc
end