Class: Dcmgr::NodeModules::InstanceHA

Inherits:
Isono::NodeModules::Base
  • Object
show all
Includes:
Logger
Defined in:
lib/dcmgr/node_modules/instance_ha.rb

Instance Method Summary collapse

Methods included from Logger

create, default_logdev, included

Instance Method Details

#restart_instance(inst) ⇒ Object 



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# File 'lib/dcmgr/node_modules/instance_ha.rb', line 27

def restart_instance(inst)
  # terminate and cleanup

  # set boot_vol before instance is cleaned up.
  case inst.image.boot_dev_type
  when Models::Image::BOOT_DEV_SAN
    boot_vol = inst.volume.find {|v| v.boot_dev == 1 }
  end

  begin
    jobrpc.run("hva-handle.#{inst.host_node.node_id}", 'cleanup', inst.canonical_uuid)
  rescue => e
    # termination may fail
  end

  # TODO: pick a new host node
  Isono::NodeModules::DataStore.barrier {
    inst.state = :failingover
    inst.save
  }

  # start a new backup instance
  begin
    case inst.image.boot_dev_type
    when Models::Image::BOOT_DEV_SAN
      jobrpc.submit("scheduler", 'schedule_instance_ha', inst.canonical_uuid, boot_vol)
    when Models::Image::BOOT_DEV_LOCAL
      jobrpc.submit("scheduler", 'schedule_instance_ha', inst.canonical_uuid, nil)
    else
      raise "Unknown boot type"
    end
  rescue => e
    # termination may fail
  end

  logger.info("#{inst.canonical_uuid} has been restarted")
end