Generate a shared HMAC key at cluster init time

[ganeti-local] / lib / rpc.py

diff --git a/lib/rpc.py b/lib/rpc.py
index 2e5d638..e28db0e 100644 (file)
--- a/lib/rpc.py
+++ b/lib/rpc.py
@@ -31,7 +31,6 @@
 # R0904: Too many public methods
 
 import os
 # R0904: Too many public methods
 
 import os

-import socket

 import logging
 import zlib
 import base64
 import logging
 import zlib
 import base64

@@ -83,9 +82,9 @@ class RpcResult(object):
   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.
 
   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
+  @ivar data: the data payload, for successful results, or None

   @type failed: boolean
   @type failed: boolean

-  @ivar failed: whether the operation failed at RPC level (not
+  @ivar failed: whether the operation failed at transport 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
       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

@@ -93,6 +92,7 @@ class RpcResult(object):
       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
       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

+  @ivar fail_msg: the error message if the call failed

 
   """
   def __init__(self, data=None, failed=False, offline=False,
 
   """
   def __init__(self, data=None, failed=False, offline=False,

@@ -103,55 +103,62 @@ class RpcResult(object):
     self.node = node
     if offline:
       self.failed = True
     self.node = node
     if offline:
       self.failed = True

-      self.error = "Node is marked offline"
+      self.fail_msg = "Node is marked offline"

       self.data = self.payload = None
     elif failed:
       self.data = self.payload = None
     elif failed:

-      self.error = data
+      self.fail_msg = self._EnsureErr(data)

       self.data = self.payload = None
     else:
       self.data = data
       self.data = self.payload = None
     else:
       self.data = data

-      self.error = None
-      if isinstance(data, (tuple, list)) and len(data) == 2:
-        self.payload = data[1]
+      if not isinstance(self.data, (tuple, list)):
+        self.fail_msg = ("RPC layer error: invalid result type (%s)" %
+                         type(self.data))
+      elif len(data) != 2:
+        self.fail_msg = ("RPC layer error: invalid result length (%d), "
+                         "expected 2" % len(self.data))
+      elif not self.data[0]:
+        self.fail_msg = self._EnsureErr(self.data[1])

       else:
       else:

-        self.payload = None
+        # finally success
+        self.fail_msg = None
+        self.payload = data[1]

 
 

-  def Raise(self):
+  @staticmethod
+  def _EnsureErr(val):
+    """Helper to ensure we return a 'True' value for error."""
+    if val:
+      return val
+    else:
+      return "No error information"
+
+  def Raise(self, msg, prereq=False):

     """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 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))
+    if not self.fail_msg:
+      return
+
+    if not msg: # one could pass None for default message
+      msg = ("Call '%s' to node '%s' has failed: %s" %
+             (self.call, self.node, self.fail_msg))
+    else:
+      msg = "%s: %s" % (msg, self.fail_msg)
+    if prereq:
+      ec = errors.OpPrereqError
+    else:
+      ec = errors.OpExecError
+    raise ec(msg)

 
   def RemoteFailMsg(self):
     """Check if the remote procedure failed.
 
 
   def RemoteFailMsg(self):
     """Check if the remote procedure failed.
 

-    This is valid only for RPC calls which return result of the form
-    (status, data | error_msg).
-
-    @return: empty string for succcess, otherwise an error message
+    @return: the fail_msg attribute

 
     """
 
     """

-    def _EnsureErr(val):
-      """Helper to ensure we return a 'True' value for error."""
-      if val:
-        return val
-      else:
-        return "No error information"
-
-    if self.failed:
-      return _EnsureErr(self.error)
-    if not isinstance(self.data, (tuple, list)):
-      return "Invalid result type (%s)" % type(self.data)
-    if len(self.data) != 2:
-      return "Invalid result length (%d), expected 2" % len(self.data)
-    if not self.data[0]:
-      return _EnsureErr(self.data[1])
-    return ""
+    return self.fail_msg

 
 
 class Client:
 
 
 class Client:

@@ -161,7 +168,7 @@ class Client:
   list of nodes, will contact (in parallel) all nodes, and return a
   dict of results (key: node name, value: result).
 
   list of nodes, will contact (in parallel) all nodes, and return a
   dict of results (key: node name, value: result).
 

-  One current bug is that generic failure is still signalled by
+  One current bug is that generic failure is still signaled by

   'False' result, which is not good. This overloading of values can
   cause bugs.
 
   'False' result, which is not good. This overloading of values can
   cause bugs.
 

@@ -220,7 +227,7 @@ class Client:
     @return: List of RPC results
 
     """
     @return: List of RPC results
 
     """

-    assert _http_manager, "RPC module not intialized"
+    assert _http_manager, "RPC module not initialized"

 
     _http_manager.ExecRequests(self.nc.values())
 
 
     _http_manager.ExecRequests(self.nc.values())
 

@@ -269,9 +276,9 @@ class RpcRunner(object):
     @type instance: L{objects.Instance}
     @param instance: an Instance object
     @type hvp: dict or None
     @type instance: L{objects.Instance}
     @param instance: an Instance object
     @type hvp: dict or None

-    @param hvp: a dictionary with overriden hypervisor parameters
+    @param hvp: a dictionary with overridden hypervisor parameters

     @type bep: dict or None
     @type bep: dict or None

-    @param bep: a dictionary with overriden backend parameters
+    @param bep: a dictionary with overridden backend parameters

     @rtype: dict
     @return: the instance dict, with the hvparams filled with the
         cluster defaults
     @rtype: dict
     @return: the instance dict, with the hvparams filled with the
         cluster defaults

@@ -294,7 +301,7 @@ class RpcRunner(object):
   def _ConnectList(self, client, node_list, call):
     """Helper for computing node addresses.
 
   def _ConnectList(self, client, node_list, call):
     """Helper for computing node addresses.
 

-    @type client: L{Client}
+    @type client: L{ganeti.rpc.Client}

     @param client: a C{Client} instance
     @type node_list: list
     @param node_list: the node list we should connect
     @param client: a C{Client} instance
     @type node_list: list
     @param node_list: the node list we should connect

@@ -324,7 +331,7 @@ class RpcRunner(object):
   def _ConnectNode(self, client, node, call):
     """Helper for computing one node's address.
 
   def _ConnectNode(self, client, node, call):
     """Helper for computing one node's address.
 

-    @type client: L{Client}
+    @type client: L{ganeti.rpc.Client}

     @param client: a C{Client} instance
     @type node: str
     @param node: the node we should connect
     @param client: a C{Client} instance
     @type node: str
     @param node: the node we should connect

@@ -409,13 +416,13 @@ class RpcRunner(object):
   # Begin RPC calls
   #
 
   # Begin RPC calls
   #
 

-  def call_volume_list(self, node_list, vg_name):
+  def call_lv_list(self, node_list, vg_name):

     """Gets the logical volumes present in a given volume group.
 
     This is a multi-node call.
 
     """
     """Gets the logical volumes present in a given volume group.
 
     This is a multi-node call.
 
     """

-    return self._MultiNodeCall(node_list, "volume_list", [vg_name])
+    return self._MultiNodeCall(node_list, "lv_list", [vg_name])

 
   def call_vg_list(self, node_list):
     """Gets the volume group list.
 
   def call_vg_list(self, node_list):
     """Gets the volume group list.

@@ -669,14 +676,14 @@ class RpcRunner(object):
                                [checkdict, cluster_name])
 
   @classmethod
                                [checkdict, cluster_name])
 
   @classmethod

-  def call_node_start_master(cls, node, start_daemons):
+  def call_node_start_master(cls, node, start_daemons, no_voting):

     """Tells a node to activate itself as a master.
 
     This is a single-node call.
 
     """
     return cls._StaticSingleNodeCall(node, "node_start_master",
     """Tells a node to activate itself as a master.
 
     This is a single-node call.
 
     """
     return cls._StaticSingleNodeCall(node, "node_start_master",

-                                     [start_daemons])
+                                     [start_daemons, no_voting])

 
   @classmethod
   def call_node_stop_master(cls, node, stop_daemons):
 
   @classmethod
   def call_node_stop_master(cls, node, stop_daemons):

@@ -864,13 +871,7 @@ class RpcRunner(object):
     This is a multi-node call.
 
     """
     This is a multi-node call.
 
     """

-    result = self._MultiNodeCall(node_list, "os_diagnose", [])
-
-    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
+    return self._MultiNodeCall(node_list, "os_diagnose", [])

 
   def call_os_get(self, node, name):
     """Returns an OS definition.
 
   def call_os_get(self, node, name):
     """Returns an OS definition.

@@ -946,7 +947,10 @@ class RpcRunner(object):
     """
     flat_disks = []
     for disk in snap_disks:
     """
     flat_disks = []
     for disk in snap_disks:

-      flat_disks.append(disk.ToDict())
+      if isinstance(disk, bool):
+        flat_disks.append(disk)
+      else:
+        flat_disks.append(disk.ToDict())

 
     return self._SingleNodeCall(node, "finalize_export",
                                 [self._InstDict(instance), flat_disks])
 
     return self._SingleNodeCall(node, "finalize_export",
                                 [self._InstDict(instance), flat_disks])