-#!/usr/bin/python
+#
#
# Copyright (C) 2006, 2007 Google Inc.
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
+Every operation which modifies the cluster state is expressed via
+opcodes.
"""
# few public methods:
# pylint: disable-msg=R0903
-class OpCode(object):
- """Abstract OpCode"""
- OP_ID = "OP_ABSTRACT"
+
+class BaseOpCode(object):
+ """A simple serializable object.
+
+ This object serves as a parent class for OpCode without any custom
+ field handling.
+
+ """
__slots__ = []
def __init__(self, **kwargs):
+ """Constructor for BaseOpCode.
+
+ The constructor takes only keyword arguments and will set
+ attributes on this object based on the passed arguments. As such,
+ it means that you should not pass arguments which are not in the
+ __slots__ attribute for this class.
+
+ """
for key in kwargs:
if key not in self.__slots__:
- raise TypeError("OpCode %s doesn't support the parameter '%s'" %
+ raise TypeError("Object %s doesn't support the parameter '%s'" %
(self.__class__.__name__, key))
setattr(self, key, kwargs[key])
+ def __getstate__(self):
+ """Generic serializer.
+
+ This method just returns the contents of the instance as a
+ dictionary.
+
+ @rtype: C{dict}
+ @return: the instance attributes and their values
+
+ """
+ state = {}
+ for name in self.__slots__:
+ if hasattr(self, name):
+ state[name] = getattr(self, name)
+ return state
-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"]
+ def __setstate__(self, state):
+ """Generic unserializer.
+ This method just restores from the serialized state the attributes
+ of the current instance.
+
+ @param state: the serialized opcode data
+ @type state: C{dict}
+
+ """
+ if not isinstance(state, dict):
+ raise ValueError("Invalid data to __setstate__: expected dict, got %s" %
+ type(state))
+
+ for name in self.__slots__:
+ if name not in state:
+ delattr(self, name)
+
+ for name in state:
+ setattr(self, name, state[name])
+
+
+class OpCode(BaseOpCode):
+ """Abstract OpCode.
+
+ This is the root of the actual OpCode hierarchy. All clases derived
+ from this class should override OP_ID.
+
+ @cvar OP_ID: The ID of this opcode. This should be unique amongst all
+ childre of this class.
+
+ """
+ OP_ID = "OP_ABSTRACT"
+ __slots__ = []
+
+ def __getstate__(self):
+ """Specialized getstate for opcodes.
+
+ This method adds to the state dictionary the OP_ID of the class,
+ so that on unload we can identify the correct class for
+ instantiating the opcode.
+
+ @rtype: C{dict}
+ @return: the state as a dictionary
+
+ """
+ data = BaseOpCode.__getstate__(self)
+ data["OP_ID"] = self.OP_ID
+ return data
+
+ @classmethod
+ def LoadOpCode(cls, data):
+ """Generic load opcode method.
+
+ The method identifies the correct opcode class from the dict-form
+ by looking for a OP_ID key, if this is not found, or its value is
+ not available in this module as a child of this class, we fail.
+
+ @type data: C{dict}
+ @param data: the serialized opcode
+
+ """
+ if not isinstance(data, dict):
+ raise ValueError("Invalid data to LoadOpCode (%s)" % type(data))
+ if "OP_ID" not in data:
+ raise ValueError("Invalid data to LoadOpcode, missing OP_ID")
+ op_id = data["OP_ID"]
+ op_class = None
+ for item in globals().values():
+ if (isinstance(item, type) and
+ issubclass(item, cls) and
+ hasattr(item, "OP_ID") and
+ getattr(item, "OP_ID") == op_id):
+ op_class = item
+ break
+ if op_class is None:
+ raise ValueError("Invalid data to LoadOpCode: OP_ID %s unsupported" %
+ op_id)
+ op = op_class()
+ new_data = data.copy()
+ del new_data["OP_ID"]
+ op.__setstate__(new_data)
+ return op
+
+ def Summary(self):
+ """Generates a summary description of this opcode.
+
+ """
+ # all OP_ID start with OP_, we remove that
+ txt = self.OP_ID[3:]
+ field_name = getattr(self, "OP_DSC_FIELD", None)
+ if field_name:
+ field_value = getattr(self, field_name, None)
+ txt = "%s(%s)" % (txt, field_value)
+ return txt
+
+
+# cluster opcodes
class OpDestroyCluster(OpCode):
- """Destroy the cluster."""
+ """Destroy the cluster.
+
+ This opcode has no other parameters. All the state is irreversibly
+ lost after the execution of this opcode.
+
+ """
OP_ID = "OP_CLUSTER_DESTROY"
__slots__ = []
__slots__ = []
-class OpClusterCopyFile(OpCode):
- """Copy a file to multiple nodes."""
- OP_ID = "OP_CLUSTER_COPYFILE"
- __slots__ = ["nodes", "filename"]
+class OpVerifyCluster(OpCode):
+ """Verify the cluster state.
+ @type skip_checks: C{list}
+ @ivar skip_checks: steps to be skipped from the verify process; this
+ needs to be a subset of
+ L{constants.VERIFY_OPTIONAL_CHECKS}; currently
+ only L{constants.VERIFY_NPLUSONE_MEM} can be passed
-class OpRunClusterCommand(OpCode):
- """Run a command on multiple nodes."""
- OP_ID = "OP_CLUSTER_RUNCOMMAND"
- __slots__ = ["nodes", "command"]
+ """
+ OP_ID = "OP_CLUSTER_VERIFY"
+ __slots__ = ["skip_checks"]
-class OpVerifyCluster(OpCode):
- """Verify the cluster state."""
- OP_ID = "OP_CLUSTER_VERIFY"
- __slots__ = []
+class OpVerifyDisks(OpCode):
+ """Verify the cluster disks.
+ Parameters: none
-class OpMasterFailover(OpCode):
- """Do a master failover."""
- OP_ID = "OP_CLUSTER_MASTERFAILOVER"
- __slots__ = []
+ Result: a tuple of four elements:
+ - list of node names with bad data returned (unreachable, etc.)
+ - dict of node names with broken volume groups (values: error msg)
+ - list of instances with degraded disks (that should be activated)
+ - dict of instances with missing logical volumes (values: (node, vol)
+ pairs with details about the missing volumes)
+ In normal operation, all lists should be empty. A non-empty instance
+ list (3rd element of the result) is still ok (errors were fixed) but
+ non-empty node list means some node is down, and probably there are
+ unfixable drbd errors.
-class OpDumpClusterConfig(OpCode):
- """Dump the cluster configuration."""
- OP_ID = "OP_CLUSTER_DUMPCONFIG"
+ 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 OpQueryConfigValues(OpCode):
+ """Query cluster configuration values."""
+ OP_ID = "OP_CLUSTER_CONFIG_QUERY"
+ __slots__ = ["output_fields"]
+
+
+class OpRenameCluster(OpCode):
+ """Rename the cluster.
+
+ @type name: C{str}
+ @ivar name: The new name of the cluster. The name and/or the master IP
+ address will be changed to match the new name and its IP
+ address.
+
+ """
+ OP_ID = "OP_CLUSTER_RENAME"
+ OP_DSC_FIELD = "name"
+ __slots__ = ["name"]
+
+
+class OpSetClusterParams(OpCode):
+ """Change the parameters of the cluster.
+
+ @type vg_name: C{str} or C{None}
+ @ivar vg_name: The new volume group name or None to disable LVM usage.
+
+ """
+ OP_ID = "OP_CLUSTER_SET_PARAMS"
+ __slots__ = [
+ "vg_name",
+ "enabled_hypervisors",
+ "hvparams",
+ "beparams",
+ "candidate_pool_size",
+ ]
+
+
+class OpRedistributeConfig(OpCode):
+ """Force a full push of the cluster configuration.
+
+ """
+ OP_ID = "OP_CLUSTER_REDIST_CONF"
+ __slots__ = [
+ ]
+
+# node opcodes
+
class OpRemoveNode(OpCode):
- """Remove a node."""
+ """Remove a node.
+
+ @type node_name: C{str}
+ @ivar node_name: The name of the node to remove. If the node still has
+ instances on it, the operation will fail.
+
+ """
OP_ID = "OP_NODE_REMOVE"
+ OP_DSC_FIELD = "node_name"
__slots__ = ["node_name"]
class OpAddNode(OpCode):
- """Add a node."""
+ """Add a node to the cluster.
+
+ @type node_name: C{str}
+ @ivar node_name: The name of the node to add. This can be a short name,
+ but it will be expanded to the FQDN.
+ @type primary_ip: IP address
+ @ivar primary_ip: The primary IP of the node. This will be ignored when the
+ opcode is submitted, but will be filled during the node
+ add (so it will be visible in the job query).
+ @type secondary_ip: IP address
+ @ivar secondary_ip: The secondary IP of the node. This needs to be passed
+ if the cluster has been initialized in 'dual-network'
+ mode, otherwise it must not be given.
+ @type readd: C{bool}
+ @ivar readd: Whether to re-add an existing node to the cluster. If
+ this is not passed, then the operation will abort if the node
+ name is already in the cluster; use this parameter to 'repair'
+ a node that had its configuration broken, or was reinstalled
+ without removal from the cluster.
+
+ """
OP_ID = "OP_NODE_ADD"
- __slots__ = ["node_name", "primary_ip", "secondary_ip"]
+ OP_DSC_FIELD = "node_name"
+ __slots__ = ["node_name", "primary_ip", "secondary_ip", "readd"]
class OpQueryNodes(OpCode):
"""Compute the list of nodes."""
OP_ID = "OP_NODE_QUERY"
- __slots__ = ["output_fields"]
-
-
-class OpQueryNodeData(OpCode):
- """Compute the node info."""
- OP_ID = "OP_NODE_INFO"
- __slots__ = ["nodes"]
+ __slots__ = ["output_fields", "names", "use_locking"]
class OpQueryNodeVolumes(OpCode):
__slots__ = ["nodes", "output_fields"]
+class OpSetNodeParams(OpCode):
+ """Change the parameters of a node."""
+ OP_ID = "OP_NODE_SET_PARAMS"
+ OP_DSC_FIELD = "node_name"
+ __slots__ = [
+ "node_name",
+ "force",
+ "master_candidate",
+ "offline",
+ ]
+
# 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"]
+ OP_DSC_FIELD = "instance_name"
+ __slots__ = [
+ "instance_name", "os_type", "pnode",
+ "disk_template", "snode", "mode",
+ "disks", "nics",
+ "src_node", "src_path", "start",
+ "wait_for_sync", "ip_check",
+ "file_storage_dir", "file_driver",
+ "iallocator",
+ "hypervisor", "hvparams", "beparams",
+ ]
class OpReinstallInstance(OpCode):
"""Reinstall an instance's OS."""
OP_ID = "OP_INSTANCE_REINSTALL"
+ OP_DSC_FIELD = "instance_name"
__slots__ = ["instance_name", "os_type"]
class OpRemoveInstance(OpCode):
"""Remove an instance."""
OP_ID = "OP_INSTANCE_REMOVE"
- __slots__ = ["instance_name"]
+ OP_DSC_FIELD = "instance_name"
+ __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"
+ OP_DSC_FIELD = "instance_name"
__slots__ = ["instance_name", "force", "extra_args"]
class OpShutdownInstance(OpCode):
"""Shutdown an instance."""
OP_ID = "OP_INSTANCE_SHUTDOWN"
+ OP_DSC_FIELD = "instance_name"
__slots__ = ["instance_name"]
-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 OpRebootInstance(OpCode):
+ """Reboot an instance."""
+ OP_ID = "OP_INSTANCE_REBOOT"
+ OP_DSC_FIELD = "instance_name"
+ __slots__ = ["instance_name", "reboot_type", "extra_args",
+ "ignore_secondaries" ]
class OpReplaceDisks(OpCode):
"""Replace the disks of an instance."""
OP_ID = "OP_INSTANCE_REPLACE_DISKS"
- __slots__ = ["instance_name", "remote_node"]
+ OP_DSC_FIELD = "instance_name"
+ __slots__ = ["instance_name", "remote_node", "mode", "disks", "iallocator"]
class OpFailoverInstance(OpCode):
"""Failover an instance."""
OP_ID = "OP_INSTANCE_FAILOVER"
+ OP_DSC_FIELD = "instance_name"
__slots__ = ["instance_name", "ignore_consistency"]
+class OpMigrateInstance(OpCode):
+ """Migrate an instance.
+
+ This migrates (without shutting down an instance) to its secondary
+ node.
+
+ @ivar instance_name: the name of the instance
+
+ """
+ OP_ID = "OP_INSTANCE_MIGRATE"
+ __slots__ = ["instance_name", "live", "cleanup"]
+
+
class OpConnectConsole(OpCode):
"""Connect to an instance's console."""
OP_ID = "OP_INSTANCE_CONSOLE"
+ OP_DSC_FIELD = "instance_name"
__slots__ = ["instance_name"]
class OpActivateInstanceDisks(OpCode):
"""Activate an instance's disks."""
OP_ID = "OP_INSTANCE_ACTIVATE_DISKS"
+ OP_DSC_FIELD = "instance_name"
__slots__ = ["instance_name"]
class OpDeactivateInstanceDisks(OpCode):
"""Deactivate an instance's disks."""
OP_ID = "OP_INSTANCE_DEACTIVATE_DISKS"
+ OP_DSC_FIELD = "instance_name"
__slots__ = ["instance_name"]
class OpQueryInstances(OpCode):
"""Compute the list of instances."""
OP_ID = "OP_INSTANCE_QUERY"
- __slots__ = ["output_fields"]
+ __slots__ = ["output_fields", "names", "use_locking"]
class OpQueryInstanceData(OpCode):
"""Compute the run-time status of instances."""
OP_ID = "OP_INSTANCE_QUERY_DATA"
- __slots__ = ["instances"]
+ __slots__ = ["instances", "static"]
-class OpSetInstanceParms(OpCode):
+class OpSetInstanceParams(OpCode):
"""Change the parameters of an instance."""
- OP_ID = "OP_INSTANCE_SET_PARMS"
- __slots__ = ["instance_name", "mem", "vcpus", "ip", "bridge"]
+ OP_ID = "OP_INSTANCE_SET_PARAMS"
+ OP_DSC_FIELD = "instance_name"
+ __slots__ = [
+ "instance_name",
+ "hvparams", "beparams", "force",
+ "nics", "disks",
+ ]
+
+
+class OpGrowDisk(OpCode):
+ """Grow a disk of an instance."""
+ OP_ID = "OP_INSTANCE_GROW_DISK"
+ OP_DSC_FIELD = "instance_name"
+ __slots__ = ["instance_name", "disk", "amount", "wait_for_sync"]
# OS opcodes
class OpDiagnoseOS(OpCode):
"""Compute the list of guest operating systems."""
OP_ID = "OP_OS_DIAGNOSE"
- __slots__ = []
+ __slots__ = ["output_fields", "names"]
+
# Exports opcodes
class OpQueryExports(OpCode):
"""Compute the list of exported images."""
OP_ID = "OP_BACKUP_QUERY"
- __slots__ = ["nodes"]
+ __slots__ = ["nodes", "use_locking"]
+
class OpExportInstance(OpCode):
"""Export an instance."""
OP_ID = "OP_BACKUP_EXPORT"
+ OP_DSC_FIELD = "instance_name"
__slots__ = ["instance_name", "target_node", "shutdown"]
+class OpRemoveExport(OpCode):
+ """Remove an instance's export."""
+ OP_ID = "OP_BACKUP_REMOVE"
+ OP_DSC_FIELD = "instance_name"
+ __slots__ = ["instance_name"]
+
+
# Tags opcodes
class OpGetTags(OpCode):
"""Returns the tags of the given object."""
OP_ID = "OP_TAGS_GET"
+ OP_DSC_FIELD = "name"
__slots__ = ["kind", "name"]
-class OpSetTag(OpCode):
- """Sets the value of a tag on a given object."""
+class OpSearchTags(OpCode):
+ """Searches the tags in the cluster for a given pattern."""
+ OP_ID = "OP_TAGS_SEARCH"
+ OP_DSC_FIELD = "pattern"
+ __slots__ = ["pattern"]
+
+
+class OpAddTags(OpCode):
+ """Add a list of tags on a given object."""
OP_ID = "OP_TAGS_SET"
- __slots__ = ["kind", "name", "tag"]
+ __slots__ = ["kind", "name", "tags"]
-class OpDelTag(OpCode):
- """Remove a tag from a given object."""
+class OpDelTags(OpCode):
+ """Remove a list of tags from a given object."""
OP_ID = "OP_TAGS_DEL"
- __slots__ = ["kind", "name", "tag"]
+ __slots__ = ["kind", "name", "tags"]
+
+
+# Test opcodes
+class OpTestDelay(OpCode):
+ """Sleeps for a configured amount of time.
+
+ This is used just for debugging and testing.
+
+ Parameters:
+ - duration: the time to sleep
+ - on_master: if true, sleep on the master
+ - on_nodes: list of nodes in which to sleep
+
+ If the on_master parameter is true, it will execute a sleep on the
+ master (before any node sleep).
+
+ If the on_nodes list is not empty, it will sleep on those nodes
+ (after the sleep on the master, if that is enabled).
+
+ As an additional feature, the case of duration < 0 will be reported
+ as an execution error, so this opcode can be used as a failure
+ generator. The case of duration == 0 will not be treated specially.
+
+ """
+ OP_ID = "OP_TEST_DELAY"
+ OP_DSC_FIELD = "duration"
+ __slots__ = ["duration", "on_master", "on_nodes"]
+
+
+class OpTestAllocator(OpCode):
+ """Allocator framework testing.
+
+ This opcode has two modes:
+ - gather and return allocator input for a given mode (allocate new
+ or replace secondary) and a given instance definition (direction
+ 'in')
+ - run a selected allocator for a given operation (as above) and
+ return the allocator output (direction 'out')
+
+ """
+ OP_ID = "OP_TEST_ALLOCATOR"
+ OP_DSC_FIELD = "allocator"
+ __slots__ = [
+ "direction", "mode", "allocator", "name",
+ "mem_size", "disks", "disk_template",
+ "os", "tags", "nics", "vcpus", "hypervisor",
+ ]
projects / ganeti-local / blobdiff