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.
"""
# pylint: disable-msg=R0903
-class BaseJO(object):
+class BaseOpCode(object):
"""A simple serializable object.
- This object serves as a parent class for both OpCode and Job since
- they are serialized in the same way.
+ 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("Object %s doesn't support the parameter '%s'" %
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):
return state
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))
setattr(self, name, state[name])
-class Job(BaseJO):
- """Job definition structure
-
- The Job definitions has two sets of parameters:
- - the parameters of the job itself (all filled by server):
- - job_id,
- - status: pending, running, successfull, failed, aborted
- - opcode parameters:
- - op_list, list of opcodes, clients creates this
- - op_status, status for each opcode, server fills in
- - op_result, result for each opcode, server fills in
+class OpCode(BaseOpCode):
+ """Abstract OpCode.
- """
- STATUS_PENDING = 1
- STATUS_RUNNING = 2
- STATUS_SUCCESS = 3
- STATUS_FAIL = 4
- STATUS_ABORT = 5
+ This is the root of the actual OpCode hierarchy. All clases derived
+ from this class should override OP_ID.
- __slots__ = [
- "job_id",
- "status",
- "op_list",
- "op_status",
- "op_result",
- ]
+ @cvar OP_ID: The ID of this opcode. This should be unique amongst all
+ childre of this class.
- def __getstate__(self):
- """Specialized getstate for jobs
-
- """
- data = BaseJO.__getstate__(self)
- if "op_list" in data:
- data["op_list"] = [op.__getstate__() for op in data["op_list"]]
- return data
-
- def __setstate__(self, state):
- """Specialized setstate for jobs
-
- """
- BaseJO.__setstate__(self, state)
- if "op_list" in state:
- self.op_list = [OpCode.LoadOpCode(op) for op in state["op_list"]]
-
-
-class OpCode(BaseJO):
- """Abstract OpCode"""
+ """
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 = BaseJO.__getstate__(self)
+ data = BaseOpCode.__getstate__(self)
data["OP_ID"] = self.OP_ID
return data
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))
return op
-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",
- "file_storage_dir"]
+class OpDestroyCluster(OpCode):
+ """Destroy the cluster.
+ This opcode has no other parameters. All the state is irreversibly
+ lost after the execution of this opcode.
-class OpDestroyCluster(OpCode):
- """Destroy the cluster."""
+ """
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 OpRunClusterCommand(OpCode):
- """Run a command on multiple nodes."""
- OP_ID = "OP_CLUSTER_RUNCOMMAND"
- __slots__ = ["nodes", "command"]
+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 OpVerifyCluster(OpCode):
- """Verify the cluster state."""
+ """
OP_ID = "OP_CLUSTER_VERIFY"
- __slots__ = []
+ __slots__ = ["skip_checks"]
class OpVerifyDisks(OpCode):
Result: two lists:
- list of node names with bad data returned (unreachable, etc.)
- - dist of node names with broken volume groups (values: error msg)
+ - 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)
__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"
class OpRenameCluster(OpCode):
- """Rename the cluster."""
+ """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"
__slots__ = ["name"]
class OpSetClusterParams(OpCode):
- """Change the parameters of the cluster."""
+ """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"]
# 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"
__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"]
+ __slots__ = ["node_name", "primary_ip", "secondary_ip", "readd"]
class OpQueryNodes(OpCode):
"disk_template", "snode", "swap_size", "mode",
"vcpus", "ip", "bridge", "src_node", "src_path", "start",
"wait_for_sync", "ip_check", "mac",
- "kernel_path", "initrd_path", "hvm_boot_order",
+ "kernel_path", "initrd_path", "hvm_boot_order", "hvm_acpi",
+ "hvm_pae", "hvm_cdrom_image_path", "vnc_bind_address",
"file_storage_dir", "file_driver",
+ "iallocator",
]
class OpReplaceDisks(OpCode):
"""Replace the disks of an instance."""
OP_ID = "OP_INSTANCE_REPLACE_DISKS"
- __slots__ = ["instance_name", "remote_node", "mode", "disks"]
+ __slots__ = ["instance_name", "remote_node", "mode", "disks", "iallocator"]
class OpFailoverInstance(OpCode):
OP_ID = "OP_INSTANCE_SET_PARAMS"
__slots__ = [
"instance_name", "mem", "vcpus", "ip", "bridge", "mac",
- "kernel_path", "initrd_path", "hvm_boot_order",
+ "kernel_path", "initrd_path", "hvm_boot_order", "hvm_acpi",
+ "hvm_pae", "hvm_cdrom_image_path", "vnc_bind_address"
]
+class OpGrowDisk(OpCode):
+ """Grow a disk of an instance."""
+ OP_ID = "OP_INSTANCE_GROW_DISK"
+ __slots__ = ["instance_name", "disk", "amount"]
+
+
# OS opcodes
class OpDiagnoseOS(OpCode):
"""Compute the list of guest operating systems."""
OP_ID = "OP_OS_DIAGNOSE"
- __slots__ = []
+ __slots__ = ["output_fields", "names"]
# Exports opcodes
OP_ID = "OP_BACKUP_EXPORT"
__slots__ = ["instance_name", "target_node", "shutdown"]
+class OpRemoveExport(OpCode):
+ """Remove an instance's export."""
+ OP_ID = "OP_BACKUP_REMOVE"
+ __slots__ = ["instance_name"]
# Tags opcodes
class OpGetTags(OpCode):
"""
OP_ID = "OP_TEST_DELAY"
__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"
+ __slots__ = [
+ "direction", "mode", "allocator", "name",
+ "mem_size", "disks", "disk_template",
+ "os", "tags", "nics", "vcpus",
+ ]
projects / ganeti-local / blobdiff