import os
import socket
-import httplib
import logging
+import zlib
+import base64
from ganeti import utils
from ganeti import objects
from ganeti import http
from ganeti import serializer
+from ganeti import constants
+from ganeti import errors
+
+import ganeti.http.client
# Module level variable
assert not _http_manager, "RPC module initialized more than once"
- _http_manager = http.HttpClientManager()
+ _http_manager = http.client.HttpClientManager()
def Shutdown():
_http_manager = None
+class RpcResult(object):
+ """RPC Result class.
+
+ This class holds an RPC result. It is needed since in multi-node
+ calls we can't raise an exception just because one one out of many
+ failed, and therefore we use this class to encapsulate the result.
+
+ @ivar data: the data payload, for successfull results, or None
+ @type failed: boolean
+ @ivar failed: whether the operation failed at RPC level (not
+ application level on the remote node)
+ @ivar call: the name of the RPC call
+ @ivar node: the name of the node to which we made the call
+ @ivar offline: whether the operation failed because the node was
+ offline, as opposed to actual failure; offline=True will always
+ imply failed=True, in order to allow simpler checking if
+ the user doesn't care about the exact failure mode
+
+ """
+ def __init__(self, data=None, failed=False, offline=False,
+ call=None, node=None):
+ self.failed = failed
+ self.offline = offline
+ self.call = call
+ self.node = node
+ if offline:
+ self.failed = True
+ self.error = "Node is marked offline"
+ self.data = None
+ elif failed:
+ self.error = data
+ self.data = None
+ else:
+ self.data = data
+ self.error = None
+
+ def Raise(self):
+ """If the result has failed, raise an OpExecError.
+
+ This is used so that LU code doesn't have to check for each
+ result, but instead can call this function.
+
+ """
+ if self.failed:
+ raise errors.OpExecError("Call '%s' to node '%s' has failed: %s" %
+ (self.call, self.node, self.error))
+
+
class Client:
"""RPC Client class.
cause bugs.
"""
- def __init__(self, procedure, args):
+ def __init__(self, procedure, body, port):
self.procedure = procedure
- self.args = args
- self.body = serializer.DumpJson(args, indent=False)
-
- self.port = utils.GetNodeDaemonPort()
- self.nodepw = utils.GetNodeDaemonPassword()
+ self.body = body
+ self.port = port
self.nc = {}
+ self._ssl_params = \
+ http.HttpSslParams(ssl_key_path=constants.SSL_CERT_FILE,
+ ssl_cert_path=constants.SSL_CERT_FILE)
+
def ConnectList(self, node_list, address_list=None):
"""Add a list of nodes to the target nodes.
if address is None:
address = name
- self.nc[name] = http.HttpClientRequest(address, self.port, http.HTTP_PUT,
- "/%s" % self.procedure,
- post_data=self.body)
+ self.nc[name] = \
+ http.client.HttpClientRequest(address, self.port, http.HTTP_PUT,
+ "/%s" % self.procedure,
+ post_data=self.body,
+ ssl_params=self._ssl_params,
+ ssl_verify_peer=True)
def GetResults(self):
"""Call nodes and return results.
results = {}
for name, req in self.nc.iteritems():
- if req.success and req.resp_status == http.HTTP_OK:
- results[name] = serializer.LoadJson(req.resp_body)
+ if req.success and req.resp_status_code == http.HTTP_OK:
+ results[name] = RpcResult(data=serializer.LoadJson(req.resp_body),
+ node=name, call=self.procedure)
continue
+ # TODO: Better error reporting
if req.error:
msg = req.error
else:
msg = req.resp_body
logging.error("RPC error from node %s: %s", name, msg)
- results[name] = False
+ results[name] = RpcResult(data=msg, failed=True, node=name,
+ call=self.procedure)
return results
"""
self._cfg = cfg
+ self.port = utils.GetNodeDaemonPort()
def _InstDict(self, instance):
"""Convert the given instance to a dict.
"""
all_nodes = self._cfg.GetAllNodesInfo()
+ name_list = []
addr_list = []
+ skip_dict = {}
for node in node_list:
if node in all_nodes:
+ if all_nodes[node].offline:
+ skip_dict[node] = RpcResult(node=node, offline=True)
+ continue
val = all_nodes[node].primary_ip
else:
val = None
addr_list.append(val)
- client.ConnectList(node_list, address_list=addr_list)
+ name_list.append(node)
+ if name_list:
+ client.ConnectList(name_list, address_list=addr_list)
+ return skip_dict
def _ConnectNode(self, client, node):
"""Helper for computing one node's address.
"""
node_info = self._cfg.GetNodeInfo(node)
if node_info is not None:
+ if node_info.offline:
+ return RpcResult(node=node, offline=True)
addr = node_info.primary_ip
else:
addr = None
client.ConnectNode(node, address=addr)
- def _MultiNodeCall(self, node_list, procedure, args,
- address_list=None):
- c = Client(procedure, args)
- if address_list is None:
- self._ConnectList(c, node_list)
- else:
- c.ConnectList(node_list, address_list=address_list)
- return c.GetResults()
+ def _MultiNodeCall(self, node_list, procedure, args):
+ """Helper for making a multi-node call
+
+ """
+ body = serializer.DumpJson(args, indent=False)
+ c = Client(procedure, body, self.port)
+ skip_dict = self._ConnectList(c, node_list)
+ skip_dict.update(c.GetResults())
+ return skip_dict
@classmethod
def _StaticMultiNodeCall(cls, node_list, procedure, args,
address_list=None):
- c = Client(procedure, args)
+ """Helper for making a multi-node static call
+
+ """
+ body = serializer.DumpJson(args, indent=False)
+ c = Client(procedure, body, utils.GetNodeDaemonPort())
c.ConnectList(node_list, address_list=address_list)
return c.GetResults()
def _SingleNodeCall(self, node, procedure, args):
- """
+ """Helper for making a single-node call
"""
- c = Client(procedure, args)
- self._ConnectNode(c, node)
- return c.GetResults().get(node, False)
+ body = serializer.DumpJson(args, indent=False)
+ c = Client(procedure, body, self.port)
+ result = self._ConnectNode(c, node)
+ if result is None:
+ # we did connect, node is not offline
+ result = c.GetResults()[node]
+ return result
@classmethod
def _StaticSingleNodeCall(cls, node, procedure, args):
+ """Helper for making a single-node static call
+
"""
+ body = serializer.DumpJson(args, indent=False)
+ c = Client(procedure, body, utils.GetNodeDaemonPort())
+ c.ConnectNode(node)
+ return c.GetResults()[node]
+
+ @staticmethod
+ def _Compress(data):
+ """Compresses a string for transport over RPC.
+
+ Small amounts of data are not compressed.
+
+ @type data: str
+ @param data: Data
+ @rtype: tuple
+ @return: Encoded data to send
"""
- c = Client(procedure, args)
- c.ConnectNode(c, node)
- return c.GetResults().get(node, False)
+ # Small amounts of data are not compressed
+ if len(data) < 512:
+ return (constants.RPC_ENCODING_NONE, data)
+
+ # Compress with zlib and encode in base64
+ return (constants.RPC_ENCODING_ZLIB_BASE64,
+ base64.b64encode(zlib.compress(data, 3)))
+
+ #
+ # Begin RPC calls
+ #
def call_volume_list(self, node_list, vg_name):
"""Gets the logical volumes present in a given volume group.
@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
+ @type vg_name: C{string}
+ @param vg_name: 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
retux = self._MultiNodeCall(node_list, "node_info",
[vg_name, hypervisor_type])
- for node_name in retux:
- ret = retux.get(node_name, False)
- if type(ret) != dict:
- logging.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")
+ for result in retux.itervalues():
+ if result.failed or not isinstance(result.data, dict):
+ result.data = {}
+
+ utils.CheckDict(result.data, {
+ '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):
to optimize the RPC speed
"""
- data = utils.ReadFile(file_name)
+ file_contents = utils.ReadFile(file_name)
+ data = cls._Compress(file_contents)
st = os.stat(file_name)
params = [file_name, data, st.st_mode, st.st_uid, st.st_gid,
st.st_atime, st.st_mtime]
address_list=address_list)
@classmethod
- def call_write_ssconf_files(cls, node_list):
+ def call_write_ssconf_files(cls, node_list, values):
"""Write ssconf files.
This is a multi-node call.
"""
- return cls._StaticMultiNodeCall(node_list, "write_ssconf_files", [])
+ return cls._StaticMultiNodeCall(node_list, "write_ssconf_files", [values])
def call_os_diagnose(self, node_list):
"""Request a diagnose of OS definitions.
"""
result = self._MultiNodeCall(node_list, "os_diagnose", [])
- 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
+ for node_result in result.values():
+ if not node_result.failed and node_result.data:
+ node_result.data = [objects.OS.FromDict(oss)
+ for oss in node_result.data]
+ return result
def call_os_get(self, node, name):
"""Returns an OS definition.
"""
result = self._SingleNodeCall(node, "os_get", [name])
- if isinstance(result, dict):
- return objects.OS.FromDict(result)
- else:
- return result
+ if not result.failed and isinstance(result.data, dict):
+ result.data = objects.OS.FromDict(result.data)
+ return result
def call_hooks_runner(self, node_list, hpath, phase, env):
"""Call the hooks runner.
"""
result = self._SingleNodeCall(node, "export_info", [path])
- if not result:
- return result
- return objects.SerializableConfigParser.Loads(str(result))
+ if not result.failed and result.data:
+ result.data = objects.SerializableConfigParser.Loads(str(result.data))
+ return result
def call_instance_os_import(self, node, inst, src_node, src_images,
cluster_name):
"""
return self._MultiNodeCall(node_list, "node_volumes", [])
+ def call_node_demote_from_mc(self, node):
+ """Demote a node from the master candidate role.
+
+ This is a single-node call.
+
+ """
+ return self._SingleNodeCall(node, "node_demote_from_mc", [])
+
def call_test_delay(self, node_list, duration):
"""Sleep for a fixed time on given node(s).
"""
return cls._StaticMultiNodeCall(node_list, "jobqueue_update",
- [file_name, content],
+ [file_name, cls._Compress(content)],
address_list=address_list)
@classmethod
return cls._StaticSingleNodeCall(node, "jobqueue_purge", [])
@classmethod
- def call_jobqueue_rename(cls, node_list, address_list, old, new):
+ def call_jobqueue_rename(cls, node_list, address_list, rename):
"""Rename a job queue file.
This is a multi-node call.
"""
- return cls._StaticMultiNodeCall(node_list, "jobqueue_rename", [old, new],
+ return cls._StaticMultiNodeCall(node_list, "jobqueue_rename", rename,
address_list=address_list)
@classmethod
projects / ganeti-local / blobdiff