Synnefo » snf-ganeti

# pylint: disable-msg=C0103,R0201,R0904

# C0103: Invalid name, since call_ are not valid

# R0201: Method could be a function, we keep all rpcs instance methods

# as not to change them back and forth between static/instance methods

# if they need to start using instance attributes

# R0904: Too many public methods

class RpcRunner(object):

  """RPC runner class"""

  def __init__(self, cfg):

    """Initialized the rpc runner.

    @type cfg:  C{config.ConfigWriter}

    @param cfg: the configuration object that will be used to get data

                about the cluster

    """

    self._cfg = cfg

  def call_volume_list(self, node_list, vg_name):

    """Gets the logical volumes present in a given volume group.

    This is a multi-node call.

    """

    c = Client("volume_list", [vg_name])

    c.connect_list(node_list)

    c.run()

    return c.getresult()

  def call_vg_list(self, node_list):

    """Gets the volume group list.

    This is a multi-node call.

    """

    c = Client("vg_list", [])

    c.connect_list(node_list)

    c.run()

    return c.getresult()

  def call_bridges_exist(self, node, bridges_list):

    """Checks if a node has all the bridges given.

    This method checks if all bridges given in the bridges_list are

    present on the remote node, so that an instance that uses interfaces

    on those bridges can be started.

    This is a single-node call.

    """

    c = Client("bridges_exist", [bridges_list])

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_instance_start(self, node, instance, extra_args):

    """Starts an instance.

    This is a single-node call.

    """

    c = Client("instance_start", [instance.ToDict(), extra_args])

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_instance_shutdown(self, node, instance):

    """Stops an instance.

    This is a single-node call.

    """

    c = Client("instance_shutdown", [instance.ToDict()])

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_instance_migrate(self, node, instance, target, live):

    """Migrate an instance.

    This is a single-node call.

    @type node: string

    @param node: the node on which the instance is currently running

    @type instance: C{objects.Instance}

    @param instance: the instance definition

    @type target: string

    @param target: the target node name

    @type live: boolean

    @param live: whether the migration should be done live or not (the

        interpretation of this parameter is left to the hypervisor)

    """

    c = Client("instance_migrate", [instance.ToDict(), target, live])

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_instance_reboot(self, node, instance, reboot_type, extra_args):

    """Reboots an instance.

    This is a single-node call.

    """

    c = Client("instance_reboot", [instance.ToDict(), reboot_type, extra_args])

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_instance_os_add(self, node, inst, osdev, swapdev):

    """Installs an OS on the given instance.

    This is a single-node call.

    """

    params = [inst.ToDict(), osdev, swapdev]

    c = Client("instance_os_add", params)

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_instance_run_rename(self, node, inst, old_name, osdev, swapdev):

    """Run the OS rename script for an instance.

    This is a single-node call.

    """

    params = [inst.ToDict(), old_name, osdev, swapdev]

    c = Client("instance_run_rename", params)

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_instance_info(self, node, instance, hname):

    """Returns information about a single instance.

    This is a single-node call.

    @type node_list: list

    @param node_list: the list of nodes to query

    @type instance: string

    @param instance: the instance name

    @type hname: string

    @param hname: the hypervisor type of the instance

    """

    c = Client("instance_info", [instance])

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_all_instances_info(self, node_list, hypervisor_list):

    """Returns information about all instances on the given nodes.

    This is a multi-node call.

    @type node_list: list

    @param node_list: the list of nodes to query

    @type hypervisor_list: list

    @param hypervisor_list: the hypervisors to query for instances

    """

    c = Client("all_instances_info", [hypervisor_list])

    c.connect_list(node_list)

    c.run()

    return c.getresult()

  def call_instance_list(self, node_list, hypervisor_list):

    """Returns the list of running instances on a given node.

    This is a multi-node call.

    @type node_list: list

    @param node_list: the list of nodes to query

    @type hypervisor_list: list

    @param hypervisor_list: the hypervisors to query for instances

    """

    c = Client("instance_list", [hypervisor_list])

    c.connect_list(node_list)

    c.run()

    return c.getresult()

  def call_node_tcp_ping(self, node, source, target, port, timeout,

                         live_port_needed):

    """Do a TcpPing on the remote node

    This is a single-node call.

    """

    c = Client("node_tcp_ping", [source, target, port, timeout,

                                 live_port_needed])

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_node_info(self, node_list, vg_name, hypervisor_type):

    """Return node information.

    This will return memory information and volume group size and free

    space.

    This is a multi-node call.

    @type node_list: list

    @param node_list: the list of nodes to query

    @type vgname: C{string}

    @param vgname: the name of the volume group to ask for disk space

        information

    @type hypervisor_type: C{str}

    @param hypervisor_type: the name of the hypervisor to ask for

        memory information

    """

    c = Client("node_info", [vg_name, hypervisor_type])

    c.connect_list(node_list)

    c.run()

    retux = c.getresult()

    for node_name in retux:

      ret = retux.get(node_name, False)

      if type(ret) != dict:

        logger.Error("could not connect to node %s" % (node_name))

        ret = {}

      utils.CheckDict(ret,

                      { 'memory_total' : '-',

                        'memory_dom0' : '-',

                        'memory_free' : '-',

                        'vg_size' : 'node_unreachable',

                        'vg_free' : '-' },

                      "call_node_info",

                      )

    return retux

  def call_node_add(self, node, dsa, dsapub, rsa, rsapub, ssh, sshpub):

    """Add a node to the cluster.

    This is a single-node call.

    """

    params = [dsa, dsapub, rsa, rsapub, ssh, sshpub]

    c = Client("node_add", params)

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_node_verify(self, node_list, checkdict, cluster_name):

    """Request verification of given parameters.

    This is a multi-node call.

    """

    c = Client("node_verify", [checkdict, cluster_name])

    c.connect_list(node_list)

    c.run()

    return c.getresult()

  @staticmethod

  def call_node_start_master(node, start_daemons):

    """Tells a node to activate itself as a master.

    This is a single-node call.

    """

    c = Client("node_start_master", [start_daemons])

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  @staticmethod

  def call_node_stop_master(node, stop_daemons):

    """Tells a node to demote itself from master status.

    This is a single-node call.

    """

    c = Client("node_stop_master", [stop_daemons])

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  @staticmethod

  def call_master_info(node_list):

    """Query master info.

    This is a multi-node call.

    """

    # TODO: should this method query down nodes?

    c = Client("master_info", [])

    c.connect_list(node_list)

    c.run()

    return c.getresult()

  def call_version(self, node_list):

    """Query node version.

    This is a multi-node call.

    """

    c = Client("version", [])

    c.connect_list(node_list)

    c.run()

    return c.getresult()

  def call_blockdev_create(self, node, bdev, size, owner, on_primary, info):

    """Request creation of a given block device.

    This is a single-node call.

    """

    params = [bdev.ToDict(), size, owner, on_primary, info]

    c = Client("blockdev_create", params)

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_blockdev_remove(self, node, bdev):

    """Request removal of a given block device.

    This is a single-node call.

    """

    c = Client("blockdev_remove", [bdev.ToDict()])

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_blockdev_rename(self, node, devlist):

    """Request rename of the given block devices.

    This is a single-node call.

    """

    params = [(d.ToDict(), uid) for d, uid in devlist]

    c = Client("blockdev_rename", params)

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_blockdev_assemble(self, node, disk, owner, on_primary):

    """Request assembling of a given block device.

    This is a single-node call.

    """

    params = [disk.ToDict(), owner, on_primary]

    c = Client("blockdev_assemble", params)

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_blockdev_shutdown(self, node, disk):

    """Request shutdown of a given block device.

    This is a single-node call.

    """

    c = Client("blockdev_shutdown", [disk.ToDict()])

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_blockdev_addchildren(self, node, bdev, ndevs):

    """Request adding a list of children to a (mirroring) device.

    This is a single-node call.

    """

    params = [bdev.ToDict(), [disk.ToDict() for disk in ndevs]]

    c = Client("blockdev_addchildren", params)

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_blockdev_removechildren(self, node, bdev, ndevs):

    """Request removing a list of children from a (mirroring) device.

    This is a single-node call.

    """

    params = [bdev.ToDict(), [disk.ToDict() for disk in ndevs]]

    c = Client("blockdev_removechildren", params)

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_blockdev_getmirrorstatus(self, node, disks):

    """Request status of a (mirroring) device.

    This is a single-node call.

    """

    params = [dsk.ToDict() for dsk in disks]

    c = Client("blockdev_getmirrorstatus", params)

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_blockdev_find(self, node, disk):

    """Request identification of a given block device.

    This is a single-node call.

    """

    c = Client("blockdev_find", [disk.ToDict()])

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_blockdev_close(self, node, disks):

    """Closes the given block devices.

    This is a single-node call.

    """

    params = [cf.ToDict() for cf in disks]

    c = Client("blockdev_close", params)

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  @staticmethod

  def call_upload_file(node_list, file_name):

    """Upload a file.

    The node will refuse the operation in case the file is not on the

    approved file list.

    This is a multi-node call.

    """

    fh = file(file_name)

    try:

      data = fh.read()

    finally:

      fh.close()

    st = os.stat(file_name)

    params = [file_name, data, st.st_mode, st.st_uid, st.st_gid,

              st.st_atime, st.st_mtime]

    c = Client("upload_file", params)

    c.connect_list(node_list)

    c.run()

    return c.getresult()

  @staticmethod

  def call_upload_file(node_list, file_name):

    """Upload a file.

    The node will refuse the operation in case the file is not on the

    approved file list.

    This is a multi-node call.

    """

    fh = file(file_name)

    try:

      data = fh.read()

    finally:

      fh.close()

    st = os.stat(file_name)

    params = [file_name, data, st.st_mode, st.st_uid, st.st_gid,

              st.st_atime, st.st_mtime]

    c = Client("upload_file", params)

    c.connect_list(node_list)

    c.run()

    return c.getresult()

  def call_os_diagnose(self, node_list):

    """Request a diagnose of OS definitions.

    This is a multi-node call.

    """

    c = Client("os_diagnose", [])

    c.connect_list(node_list)

    c.run()

    result = c.getresult()

    new_result = {}

    for node_name in result:

      if result[node_name]:

        nr = [objects.OS.FromDict(oss) for oss in result[node_name]]

      else:

        nr = []

      new_result[node_name] = nr

    return new_result

  def call_os_get(self, node, name):

    """Returns an OS definition.

    This is a single-node call.

    """

    c = Client("os_get", [name])

    c.connect(node)

    c.run()

    result = c.getresult().get(node, False)

    if isinstance(result, dict):

      return objects.OS.FromDict(result)

    else:

      return result

  def call_hooks_runner(self, node_list, hpath, phase, env):

    """Call the hooks runner.

    Args:

      - op: the OpCode instance

      - env: a dictionary with the environment

    This is a multi-node call.

    """

    params = [hpath, phase, env]

    c = Client("hooks_runner", params)

    c.connect_list(node_list)

    c.run()

    result = c.getresult()

    return result

  def call_iallocator_runner(self, node, name, idata):

    """Call an iallocator on a remote node

    Args:

      - name: the iallocator name

      - input: the json-encoded input string

    This is a single-node call.

    """

    params = [name, idata]

    c = Client("iallocator_runner", params)

    c.connect(node)

    c.run()

    result = c.getresult().get(node, False)

    return result

  def call_blockdev_grow(self, node, cf_bdev, amount):

    """Request a snapshot of the given block device.

    This is a single-node call.

    """

    c = Client("blockdev_grow", [cf_bdev.ToDict(), amount])

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_blockdev_snapshot(self, node, cf_bdev):

    """Request a snapshot of the given block device.

    This is a single-node call.

    """

    c = Client("blockdev_snapshot", [cf_bdev.ToDict()])

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_snapshot_export(self, node, snap_bdev, dest_node, instance,

                           cluster_name):

    """Request the export of a given snapshot.

    This is a single-node call.

    """

    params = [snap_bdev.ToDict(), dest_node, instance.ToDict(), cluster_name]

    c = Client("snapshot_export", params)

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_finalize_export(self, node, instance, snap_disks):

    """Request the completion of an export operation.

    This writes the export config file, etc.

    This is a single-node call.

    """

    flat_disks = []

    for disk in snap_disks:

      flat_disks.append(disk.ToDict())

    params = [instance.ToDict(), flat_disks]

    c = Client("finalize_export", params)

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_export_info(self, node, path):

    """Queries the export information in a given path.

    This is a single-node call.

    """

    c = Client("export_info", [path])

    c.connect(node)

    c.run()

    result = c.getresult().get(node, False)

    if not result:

      return result

    return objects.SerializableConfigParser.Loads(str(result))

  def call_instance_os_import(self, node, inst, osdev, swapdev,

                              src_node, src_image, cluster_name):

    """Request the import of a backup into an instance.

    This is a single-node call.

    """

    params = [inst.ToDict(), osdev, swapdev, src_node, src_image, cluster_name]

    c = Client("instance_os_import", params)

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_export_list(self, node_list):

    """Gets the stored exports list.

    This is a multi-node call.

    """

    c = Client("export_list", [])

    c.connect_list(node_list)

    c.run()

    result = c.getresult()

    return result

  def call_export_remove(self, node, export):

    """Requests removal of a given export.

    This is a single-node call.

    """

    c = Client("export_remove", [export])

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_node_leave_cluster(self, node):

    """Requests a node to clean the cluster information it has.

    This will remove the configuration information from the ganeti data

    dir.

    This is a single-node call.

    """

    c = Client("node_leave_cluster", [])

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_node_volumes(self, node_list):

    """Gets all volumes on node(s).

    This is a multi-node call.

    """

    c = Client("node_volumes", [])

    c.connect_list(node_list)

    c.run()

    return c.getresult()

  def call_test_delay(self, node_list, duration):

    """Sleep for a fixed time on given node(s).

    This is a multi-node call.

    """

    c = Client("test_delay", [duration])

    c.connect_list(node_list)

    c.run()

    return c.getresult()

  def call_file_storage_dir_create(self, node, file_storage_dir):

    """Create the given file storage directory.

    This is a single-node call.

    """

    c = Client("file_storage_dir_create", [file_storage_dir])

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_file_storage_dir_remove(self, node, file_storage_dir):

    """Remove the given file storage directory.

    This is a single-node call.

    """

    c = Client("file_storage_dir_remove", [file_storage_dir])

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  def call_file_storage_dir_rename(self, node, old_file_storage_dir,

                                   new_file_storage_dir):

    """Rename file storage directory.

    This is a single-node call.

    """

    c = Client("file_storage_dir_rename",

               [old_file_storage_dir, new_file_storage_dir])

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  @staticmethod

  def call_jobqueue_update(node_list, file_name, content):

    """Update job queue.

    This is a multi-node call.

    """

    c = Client("jobqueue_update", [file_name, content])

    c.connect_list(node_list)

    c.run()

    result = c.getresult()

    return result

  @staticmethod

  def call_jobqueue_purge(node):

    """Purge job queue.

    This is a single-node call.

    """

    c = Client("jobqueue_purge", [])

    c.connect(node)

    c.run()

    return c.getresult().get(node, False)

  @staticmethod

  def call_jobqueue_rename(node_list, old, new):

    """Rename a job queue file.

    This is a multi-node call.

    """

    c = Client("jobqueue_rename", [old, new])

    c.connect_list(node_list)

    c.run()

    result = c.getresult()

    return result