Merge branch 'stable-2.6' into devel-2.6
[ganeti-local] / lib / rpc.py
index bf05cfb..b06c3c7 100644 (file)
@@ -30,7 +30,6 @@
 # if they need to start using instance attributes
 # R0904: Too many public methods
 
-import os
 import logging
 import zlib
 import base64
@@ -240,11 +239,13 @@ class RpcResult(object):
     raise ec(*args) # pylint: disable=W0142
 
 
-def _SsconfResolver(node_list,
+def _SsconfResolver(ssconf_ips, node_list, _,
                     ssc=ssconf.SimpleStore,
                     nslookup_fn=netutils.Hostname.GetIP):
   """Return addresses for given node names.
 
+  @type ssconf_ips: bool
+  @param ssconf_ips: Use the ssconf IPs
   @type node_list: list
   @param node_list: List of node names
   @type ssc: class
@@ -256,9 +257,13 @@ def _SsconfResolver(node_list,
 
   """
   ss = ssc()
-  iplist = ss.GetNodePrimaryIPList()
   family = ss.GetPrimaryIPFamily()
-  ipmap = dict(entry.split() for entry in iplist)
+
+  if ssconf_ips:
+    iplist = ss.GetNodePrimaryIPList()
+    ipmap = dict(entry.split() for entry in iplist)
+  else:
+    ipmap = {}
 
   result = []
   for node in node_list:
@@ -277,7 +282,7 @@ class _StaticResolver:
     """
     self._addresses = addresses
 
-  def __call__(self, hosts):
+  def __call__(self, hosts, _):
     """Returns static addresses for hosts.
 
     """
@@ -285,7 +290,7 @@ class _StaticResolver:
     return zip(hosts, self._addresses)
 
 
-def _CheckConfigNode(name, node):
+def _CheckConfigNode(name, node, accept_offline_node):
   """Checks if a node is online.
 
   @type name: string
@@ -297,24 +302,29 @@ def _CheckConfigNode(name, node):
   if node is None:
     # Depend on DNS for name resolution
     ip = name
-  elif node.offline:
+  elif node.offline and not accept_offline_node:
     ip = _OFFLINE
   else:
     ip = node.primary_ip
   return (name, ip)
 
 
-def _NodeConfigResolver(single_node_fn, all_nodes_fn, hosts):
+def _NodeConfigResolver(single_node_fn, all_nodes_fn, hosts, opts):
   """Calculate node addresses using configuration.
 
   """
+  accept_offline_node = (opts is rpc_defs.ACCEPT_OFFLINE_NODE)
+
+  assert accept_offline_node or opts is None, "Unknown option"
+
   # Special case for single-host lookups
   if len(hosts) == 1:
     (name, ) = hosts
-    return [_CheckConfigNode(name, single_node_fn(name))]
+    return [_CheckConfigNode(name, single_node_fn(name), accept_offline_node)]
   else:
     all_nodes = all_nodes_fn()
-    return [_CheckConfigNode(name, all_nodes.get(name, None))
+    return [_CheckConfigNode(name, all_nodes.get(name, None),
+                             accept_offline_node)
             for name in hosts]
 
 
@@ -358,7 +368,7 @@ class _RpcProcessor:
       else:
         requests[name] = \
           http.client.HttpClientRequest(str(ip), port,
-                                        http.HTTP_PUT, str("/%s" % procedure),
+                                        http.HTTP_POST, str("/%s" % procedure),
                                         headers=_RPC_CLIENT_HEADERS,
                                         post_data=body[name],
                                         read_timeout=read_timeout,
@@ -391,8 +401,8 @@ class _RpcProcessor:
 
     return results
 
-  def __call__(self, hosts, procedure, body, read_timeout=None,
-               _req_process_fn=http.client.ProcessRequests):
+  def __call__(self, hosts, procedure, body, read_timeout, resolver_opts,
+               _req_process_fn=None):
     """Makes an RPC request to a number of nodes.
 
     @type hosts: sequence
@@ -408,9 +418,12 @@ class _RpcProcessor:
     assert read_timeout is not None, \
       "Missing RPC read timeout for procedure '%s'" % procedure
 
+    if _req_process_fn is None:
+      _req_process_fn = http.client.ProcessRequests
+
     (results, requests) = \
-      self._PrepareRequests(self._resolver(hosts), self._port, procedure,
-                            body, read_timeout)
+      self._PrepareRequests(self._resolver(hosts, resolver_opts), self._port,
+                            procedure, body, read_timeout)
 
     _req_process_fn(requests.values(), lock_monitor_cb=self._lock_monitor_cb)
 
@@ -420,13 +433,15 @@ class _RpcProcessor:
 
 
 class _RpcClientBase:
-  def __init__(self, resolver, encoder_fn, lock_monitor_cb=None):
+  def __init__(self, resolver, encoder_fn, lock_monitor_cb=None,
+               _req_process_fn=None):
     """Initializes this class.
 
     """
-    self._proc = _RpcProcessor(resolver,
-                               netutils.GetDaemonPort(constants.NODED),
-                               lock_monitor_cb=lock_monitor_cb)
+    proc = _RpcProcessor(resolver,
+                         netutils.GetDaemonPort(constants.NODED),
+                         lock_monitor_cb=lock_monitor_cb)
+    self._proc = compat.partial(proc, _req_process_fn=_req_process_fn)
     self._encoder = compat.partial(self._EncodeArg, encoder_fn)
 
   @staticmethod
@@ -443,13 +458,22 @@ class _RpcClientBase:
     """Entry point for automatically generated RPC wrappers.
 
     """
-    (procedure, _, timeout, argdefs, prep_fn, postproc_fn, _) = cdef
+    (procedure, _, resolver_opts, timeout, argdefs,
+     prep_fn, postproc_fn, _) = cdef
 
     if callable(timeout):
       read_timeout = timeout(args)
     else:
       read_timeout = timeout
 
+    if callable(resolver_opts):
+      req_resolver_opts = resolver_opts(args)
+    else:
+      req_resolver_opts = resolver_opts
+
+    if len(args) != len(argdefs):
+      raise errors.ProgrammerError("Number of passed arguments doesn't match")
+
     enc_args = map(self._encoder, zip(map(compat.snd, argdefs), args))
     if prep_fn is None:
       # for a no-op prep_fn, we serialise the body once, and then we
@@ -459,12 +483,12 @@ class _RpcClientBase:
     else:
       # for a custom prep_fn, we pass the encoded arguments and the
       # node name to the prep_fn, and we serialise its return value
-      assert(callable(prep_fn))
+      assert callable(prep_fn)
       pnbody = dict((n, serializer.DumpJson(prep_fn(n, enc_args)))
                     for n in node_list)
 
-    result = self._proc(node_list, procedure, pnbody,
-                        read_timeout=read_timeout)
+    result = self._proc(node_list, procedure, pnbody, read_timeout,
+                        req_resolver_opts)
 
     if postproc_fn:
       return dict(map(lambda (key, value): (key, postproc_fn(value)),
@@ -497,13 +521,19 @@ def _EncodeNodeToDiskDict(value):
               for name, disks in value.items())
 
 
-def _PrepareFileUpload(filename):
+def _PrepareFileUpload(getents_fn, filename):
   """Loads a file and prepares it for an upload to nodes.
 
   """
-  data = _Compress(utils.ReadFile(filename))
-  st = os.stat(filename)
-  getents = runtime.GetEnts()
+  statcb = utils.FileStatHelper()
+  data = _Compress(utils.ReadFile(filename, preread=statcb))
+  st = statcb.st
+
+  if getents_fn is None:
+    getents_fn = runtime.GetEnts
+
+  getents = getents_fn()
+
   return [filename, data, st.st_mode, getents.LookupUid(st.st_uid),
           getents.LookupGid(st.st_gid), st.st_atime, st.st_mtime]
 
@@ -545,12 +575,61 @@ def _EncodeBlockdevRename(value):
   return [(d.ToDict(), uid) for d, uid in value]
 
 
+def _AnnotateDParamsDRBD(disk, (drbd_params, data_params, meta_params)):
+  """Annotates just DRBD disks layouts.
+
+  """
+  assert disk.dev_type == constants.LD_DRBD8
+
+  disk.params = objects.FillDict(drbd_params, disk.params)
+  (dev_data, dev_meta) = disk.children
+  dev_data.params = objects.FillDict(data_params, dev_data.params)
+  dev_meta.params = objects.FillDict(meta_params, dev_meta.params)
+
+  return disk
+
+
+def _AnnotateDParamsGeneric(disk, (params, )):
+  """Generic disk parameter annotation routine.
+
+  """
+  assert disk.dev_type != constants.LD_DRBD8
+
+  disk.params = objects.FillDict(params, disk.params)
+
+  return disk
+
+
+def AnnotateDiskParams(template, disks, disk_params):
+  """Annotates the disk objects with the disk parameters.
+
+  @param template: The disk template used
+  @param disks: The list of disks objects to annotate
+  @param disk_params: The disk paramaters for annotation
+  @returns: A list of disk objects annotated
+
+  """
+  ld_params = objects.Disk.ComputeLDParams(template, disk_params)
+
+  if template == constants.DT_DRBD8:
+    annotation_fn = _AnnotateDParamsDRBD
+  elif template == constants.DT_DISKLESS:
+    annotation_fn = lambda disk, _: disk
+  else:
+    annotation_fn = _AnnotateDParamsGeneric
+
+  new_disks = []
+  for disk in disks:
+    new_disks.append(annotation_fn(disk.Copy(), ld_params))
+
+  return new_disks
+
+
 #: Generic encoders
 _ENCODERS = {
   rpc_defs.ED_OBJECT_DICT: _ObjectToDict,
   rpc_defs.ED_OBJECT_DICT_LIST: _ObjectListToDict,
   rpc_defs.ED_NODE_TO_DISK_DICT: _EncodeNodeToDiskDict,
-  rpc_defs.ED_FILE_DETAILS: _PrepareFileUpload,
   rpc_defs.ED_COMPRESS: _Compress,
   rpc_defs.ED_FINALIZE_EXPORT_DISKS: _PrepareFinalizeExportDisks,
   rpc_defs.ED_IMPEXP_IO: _EncodeImportExportIO,
@@ -561,40 +640,52 @@ _ENCODERS = {
 class RpcRunner(_RpcClientBase,
                 _generated_rpc.RpcClientDefault,
                 _generated_rpc.RpcClientBootstrap,
+                _generated_rpc.RpcClientDnsOnly,
                 _generated_rpc.RpcClientConfig):
   """RPC runner class.
 
   """
-  def __init__(self, context):
+  def __init__(self, cfg, lock_monitor_cb, _req_process_fn=None, _getents=None):
     """Initialized the RPC runner.
 
-    @type context: C{masterd.GanetiContext}
-    @param context: Ganeti context
+    @type cfg: L{config.ConfigWriter}
+    @param cfg: Configuration
+    @type lock_monitor_cb: callable
+    @param lock_monitor_cb: Lock monitor callback
 
     """
-    self._cfg = context.cfg
+    self._cfg = cfg
 
     encoders = _ENCODERS.copy()
 
-    # Add encoders requiring configuration object
     encoders.update({
+      # Encoders requiring configuration object
       rpc_defs.ED_INST_DICT: self._InstDict,
-      rpc_defs.ED_INST_DICT_HVP_BEP: self._InstDictHvpBep,
-      rpc_defs.ED_INST_DICT_OSP: self._InstDictOsp,
+      rpc_defs.ED_INST_DICT_HVP_BEP_DP: self._InstDictHvpBepDp,
+      rpc_defs.ED_INST_DICT_OSP_DP: self._InstDictOspDp,
+
+      # Encoders annotating disk parameters
+      rpc_defs.ED_DISKS_DICT_DP: self._DisksDictDP,
+      rpc_defs.ED_SINGLE_DISK_DICT_DP: self._SingleDiskDictDP,
+
+      # Encoders with special requirements
+      rpc_defs.ED_FILE_DETAILS: compat.partial(_PrepareFileUpload, _getents),
       })
 
     # Resolver using configuration
-    resolver = compat.partial(_NodeConfigResolver, self._cfg.GetNodeInfo,
-                              self._cfg.GetAllNodesInfo)
+    resolver = compat.partial(_NodeConfigResolver, cfg.GetNodeInfo,
+                              cfg.GetAllNodesInfo)
 
     # Pylint doesn't recognize multiple inheritance properly, see
     # <http://www.logilab.org/ticket/36586> and
     # <http://www.logilab.org/ticket/35642>
     # pylint: disable=W0233
     _RpcClientBase.__init__(self, resolver, encoders.get,
-                            lock_monitor_cb=context.glm.AddToLockMonitor)
+                            lock_monitor_cb=lock_monitor_cb,
+                            _req_process_fn=_req_process_fn)
     _generated_rpc.RpcClientConfig.__init__(self)
     _generated_rpc.RpcClientBootstrap.__init__(self)
+    _generated_rpc.RpcClientDnsOnly.__init__(self)
     _generated_rpc.RpcClientDefault.__init__(self)
 
   def _InstDict(self, instance, hvp=None, bep=None, osp=None):
@@ -628,23 +719,40 @@ class RpcRunner(_RpcClientBase,
     if osp is not None:
       idict["osparams"].update(osp)
     for nic in idict["nics"]:
-      nic['nicparams'] = objects.FillDict(
+      nic["nicparams"] = objects.FillDict(
         cluster.nicparams[constants.PP_DEFAULT],
-        nic['nicparams'])
+        nic["nicparams"])
+    idict["disks"] = self._DisksDictDP((instance.disks, instance))
     return idict
 
-  def _InstDictHvpBep(self, (instance, hvp, bep)):
+  def _InstDictHvpBepDp(self, (instance, hvp, bep)):
     """Wrapper for L{_InstDict}.
 
     """
     return self._InstDict(instance, hvp=hvp, bep=bep)
 
-  def _InstDictOsp(self, (instance, osparams)):
+  def _InstDictOspDp(self, (instance, osparams)):
     """Wrapper for L{_InstDict}.
 
     """
     return self._InstDict(instance, osp=osparams)
 
+  def _DisksDictDP(self, (disks, instance)):
+    """Wrapper for L{AnnotateDiskParams}.
+
+    """
+    diskparams = self._cfg.GetInstanceDiskParams(instance)
+    return [disk.ToDict()
+            for disk in AnnotateDiskParams(instance.disk_template,
+                                           disks, diskparams)]
+
+  def _SingleDiskDictDP(self, (disk, instance)):
+    """Wrapper for L{AnnotateDiskParams}.
+
+    """
+    (anno_disk,) = self._DisksDictDP(([disk], instance))
+    return anno_disk
+
 
 class JobQueueRunner(_RpcClientBase, _generated_rpc.RpcClientJobQueue):
   """RPC wrappers for job queue.
@@ -655,7 +763,7 @@ class JobQueueRunner(_RpcClientBase, _generated_rpc.RpcClientJobQueue):
 
     """
     if address_list is None:
-      resolver = _SsconfResolver
+      resolver = compat.partial(_SsconfResolver, True)
     else:
       # Caller provided an address list
       resolver = _StaticResolver(address_list)
@@ -665,7 +773,9 @@ class JobQueueRunner(_RpcClientBase, _generated_rpc.RpcClientJobQueue):
     _generated_rpc.RpcClientJobQueue.__init__(self)
 
 
-class BootstrapRunner(_RpcClientBase, _generated_rpc.RpcClientBootstrap):
+class BootstrapRunner(_RpcClientBase,
+                      _generated_rpc.RpcClientBootstrap,
+                      _generated_rpc.RpcClientDnsOnly):
   """RPC wrappers for bootstrapping.
 
   """
@@ -673,15 +783,35 @@ class BootstrapRunner(_RpcClientBase, _generated_rpc.RpcClientBootstrap):
     """Initializes this class.
 
     """
-    _RpcClientBase.__init__(self, _SsconfResolver, _ENCODERS.get)
+    # Pylint doesn't recognize multiple inheritance properly, see
+    # <http://www.logilab.org/ticket/36586> and
+    # <http://www.logilab.org/ticket/35642>
+    # pylint: disable=W0233
+    _RpcClientBase.__init__(self, compat.partial(_SsconfResolver, True),
+                            _ENCODERS.get)
     _generated_rpc.RpcClientBootstrap.__init__(self)
+    _generated_rpc.RpcClientDnsOnly.__init__(self)
+
+
+class DnsOnlyRunner(_RpcClientBase, _generated_rpc.RpcClientDnsOnly):
+  """RPC wrappers for calls using only DNS.
+
+  """
+  def __init__(self):
+    """Initialize this class.
+
+    """
+    _RpcClientBase.__init__(self, compat.partial(_SsconfResolver, False),
+                            _ENCODERS.get)
+    _generated_rpc.RpcClientDnsOnly.__init__(self)
 
 
 class ConfigRunner(_RpcClientBase, _generated_rpc.RpcClientConfig):
   """RPC wrappers for L{config}.
 
   """
-  def __init__(self, context, address_list):
+  def __init__(self, context, address_list, _req_process_fn=None,
+               _getents=None):
     """Initializes this class.
 
     """
@@ -691,11 +821,18 @@ class ConfigRunner(_RpcClientBase, _generated_rpc.RpcClientConfig):
       lock_monitor_cb = None
 
     if address_list is None:
-      resolver = _SsconfResolver
+      resolver = compat.partial(_SsconfResolver, True)
     else:
       # Caller provided an address list
       resolver = _StaticResolver(address_list)
 
-    _RpcClientBase.__init__(self, resolver, _ENCODERS.get,
-                            lock_monitor_cb=lock_monitor_cb)
+    encoders = _ENCODERS.copy()
+
+    encoders.update({
+      rpc_defs.ED_FILE_DETAILS: compat.partial(_PrepareFileUpload, _getents),
+      })
+
+    _RpcClientBase.__init__(self, resolver, encoders.get,
+                            lock_monitor_cb=lock_monitor_cb,
+                            _req_process_fn=_req_process_fn)
     _generated_rpc.RpcClientConfig.__init__(self)