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#

# Copyright (C) 2006, 2007 Google Inc.

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful, but

# WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

# General Public License for more details.

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# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

# 02110-1301, USA.

"""OpCodes module

This module implements the data structures which define the cluster

operations - the so-called opcodes.

This module implements the logic for doing operations in the cluster. There

are two kinds of classes defined:

  - opcodes, which are small classes only holding data for the task at hand

  - logical units, which know how to deal with their specific opcode only

"""

# this are practically structures, so disable the message about too

# few public methods:

# pylint: disable-msg=R0903

class OpCode(object):

  """Abstract OpCode"""

  OP_ID = "OP_ABSTRACT"

  __slots__ = []

  def __init__(self, **kwargs):

    for key in kwargs:

      if key not in self.__slots__:

        raise TypeError("OpCode %s doesn't support the parameter '%s'" %

                        (self.__class__.__name__, key))

      setattr(self, key, kwargs[key])

class OpInitCluster(OpCode):

  """Initialise the cluster."""

  OP_ID = "OP_CLUSTER_INIT"

  __slots__ = ["cluster_name", "secondary_ip", "hypervisor_type",

               "vg_name", "mac_prefix", "def_bridge", "master_netdev"]

class OpDestroyCluster(OpCode):

  """Destroy the cluster."""

  OP_ID = "OP_CLUSTER_DESTROY"

  __slots__ = []

class OpQueryClusterInfo(OpCode):

  """Query cluster information."""

  OP_ID = "OP_CLUSTER_QUERY"

  __slots__ = []

class OpClusterCopyFile(OpCode):

  """Copy a file to multiple nodes."""

  OP_ID = "OP_CLUSTER_COPYFILE"

  __slots__ = ["nodes", "filename"]

class OpRunClusterCommand(OpCode):

  """Run a command on multiple nodes."""

  OP_ID = "OP_CLUSTER_RUNCOMMAND"

  __slots__ = ["nodes", "command"]

class OpVerifyCluster(OpCode):

  """Verify the cluster state."""

  OP_ID = "OP_CLUSTER_VERIFY"

  __slots__ = []

class OpVerifyDisks(OpCode):

  """Verify the cluster disks.

  Parameters: none

  Result: two lists:

    - list of node names with bad data returned (unreachable, etc.)

    - list of instances with degraded disks (that should be activated)

  In normal operation, both lists should be empty. A non-empty

  instance list is still ok (errors were fixed) but non-empty node

  list means some node is down, and probably there are unfixable drbd

  errors.

  Note that only instances that are drbd-based are taken into

  consideration. This might need to be revisited in the future.

  """

  OP_ID = "OP_CLUSTER_VERIFY_DISKS"

  __slots__ = []

class OpMasterFailover(OpCode):

  """Do a master failover."""

  OP_ID = "OP_CLUSTER_MASTERFAILOVER"

  __slots__ = []

class OpDumpClusterConfig(OpCode):

  """Dump the cluster configuration."""

  OP_ID = "OP_CLUSTER_DUMPCONFIG"

  __slots__ = []

class OpRenameCluster(OpCode):

  """Rename the cluster."""

  OP_ID = "OP_CLUSTER_RENAME"

  __slots__ = ["name"]

# node opcodes

class OpRemoveNode(OpCode):

  """Remove a node."""

  OP_ID = "OP_NODE_REMOVE"

  __slots__ = ["node_name"]

class OpAddNode(OpCode):

  """Add a node."""

  OP_ID = "OP_NODE_ADD"

  __slots__ = ["node_name", "primary_ip", "secondary_ip"]

class OpQueryNodes(OpCode):

  """Compute the list of nodes."""

  OP_ID = "OP_NODE_QUERY"

  __slots__ = ["output_fields", "names"]

class OpQueryNodeVolumes(OpCode):

  """Get list of volumes on node."""

  OP_ID = "OP_NODE_QUERYVOLS"

  __slots__ = ["nodes", "output_fields"]

# instance opcodes

class OpCreateInstance(OpCode):

  """Create an instance."""

  OP_ID = "OP_INSTANCE_CREATE"

  __slots__ = ["instance_name", "mem_size", "disk_size", "os_type", "pnode",

               "disk_template", "snode", "swap_size", "mode",

               "vcpus", "ip", "bridge", "src_node", "src_path", "start",

               "wait_for_sync", "ip_check"]

class OpReinstallInstance(OpCode):

  """Reinstall an instance's OS."""

  OP_ID = "OP_INSTANCE_REINSTALL"

  __slots__ = ["instance_name", "os_type"]

class OpRemoveInstance(OpCode):

  """Remove an instance."""

  OP_ID = "OP_INSTANCE_REMOVE"

  __slots__ = ["instance_name", "ignore_failures"]

class OpRenameInstance(OpCode):

  """Rename an instance."""

  OP_ID = "OP_INSTANCE_RENAME"

  __slots__ = ["instance_name", "ignore_ip", "new_name"]

class OpStartupInstance(OpCode):

  """Startup an instance."""

  OP_ID = "OP_INSTANCE_STARTUP"

  __slots__ = ["instance_name", "force", "extra_args"]

class OpShutdownInstance(OpCode):

  """Shutdown an instance."""

  OP_ID = "OP_INSTANCE_SHUTDOWN"

  __slots__ = ["instance_name"]

class OpRebootInstance(OpCode):

  """Reboot an instance."""

  OP_ID = "OP_INSTANCE_STARTUP"

  __slots__ = ["instance_name", "reboot_type", "extra_args",

               "ignore_secondaries" ]

class OpAddMDDRBDComponent(OpCode):

  """Add a MD-DRBD component."""

  OP_ID = "OP_INSTANCE_ADD_MDDRBD"

  __slots__ = ["instance_name", "remote_node", "disk_name"]

class OpRemoveMDDRBDComponent(OpCode):

  """Remove a MD-DRBD component."""

  OP_ID = "OP_INSTANCE_REMOVE_MDDRBD"

  __slots__ = ["instance_name", "disk_name", "disk_id"]

class OpReplaceDisks(OpCode):

  """Replace the disks of an instance."""

  OP_ID = "OP_INSTANCE_REPLACE_DISKS"

  __slots__ = ["instance_name", "remote_node", "mode", "disks"]

class OpFailoverInstance(OpCode):

  """Failover an instance."""

  OP_ID = "OP_INSTANCE_FAILOVER"

  __slots__ = ["instance_name", "ignore_consistency"]

class OpConnectConsole(OpCode):

  """Connect to an instance's console."""

  OP_ID = "OP_INSTANCE_CONSOLE"

  __slots__ = ["instance_name"]

class OpActivateInstanceDisks(OpCode):

  """Activate an instance's disks."""

  OP_ID = "OP_INSTANCE_ACTIVATE_DISKS"

  __slots__ = ["instance_name"]

class OpDeactivateInstanceDisks(OpCode):

  """Deactivate an instance's disks."""

  OP_ID = "OP_INSTANCE_DEACTIVATE_DISKS"

  __slots__ = ["instance_name"]

class OpQueryInstances(OpCode):

  """Compute the list of instances."""

  OP_ID = "OP_INSTANCE_QUERY"

  __slots__ = ["output_fields", "names"]

class OpQueryInstanceData(OpCode):

  """Compute the run-time status of instances."""

  OP_ID = "OP_INSTANCE_QUERY_DATA"

  __slots__ = ["instances"]

class OpSetInstanceParms(OpCode):

  """Change the parameters of an instance."""

  OP_ID = "OP_INSTANCE_SET_PARMS"

  __slots__ = ["instance_name", "mem", "vcpus", "ip", "bridge"]

# OS opcodes

class OpDiagnoseOS(OpCode):

  """Compute the list of guest operating systems."""

  OP_ID = "OP_OS_DIAGNOSE"

  __slots__ = []

# Exports opcodes

class OpQueryExports(OpCode):

  """Compute the list of exported images."""

  OP_ID = "OP_BACKUP_QUERY"

  __slots__ = ["nodes"]

class OpExportInstance(OpCode):

  """Export an instance."""

  OP_ID = "OP_BACKUP_EXPORT"

  __slots__ = ["instance_name", "target_node", "shutdown"]

# Tags opcodes

class OpGetTags(OpCode):

  """Returns the tags of the given object."""

  OP_ID = "OP_TAGS_GET"

  __slots__ = ["kind", "name"]

class OpSearchTags(OpCode):

  """Searches the tags in the cluster for a given pattern."""

  OP_ID = "OP_TAGS_SEARCH"

  __slots__ = ["pattern"]

class OpAddTags(OpCode):

  """Add a list of tags on a given object."""

  OP_ID = "OP_TAGS_SET"

  __slots__ = ["kind", "name", "tags"]

class OpDelTags(OpCode):

  """Remove a list of tags from a given object."""

  OP_ID = "OP_TAGS_DEL"

  __slots__ = ["kind", "name", "tags"]