qlang: Add parser for query filter language

[ganeti-local] / lib / ssconf.py

diff --git a/lib/ssconf.py b/lib/ssconf.py
index a0ba135..5498ba3 100644 (file)
--- a/lib/ssconf.py
+++ b/lib/ssconf.py
@@ -1,7 +1,7 @@
 #
 #
 
 #
 #
 

-# Copyright (C) 2006, 2007, 2008 Google Inc.
+# Copyright (C) 2006, 2007, 2008, 2010 Google Inc.

 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by

@@ -29,11 +29,14 @@ configuration data, which is mostly static and available to all nodes.
 import sys
 import re
 import os
 import sys
 import re
 import os

+import errno

 
 from ganeti import errors
 from ganeti import constants
 from ganeti import utils
 from ganeti import serializer
 
 from ganeti import errors
 from ganeti import constants
 from ganeti import utils
 from ganeti import serializer

+from ganeti import objects
+from ganeti import netutils

 
 
 SSCONF_LOCK_TIMEOUT = 10
 
 
 SSCONF_LOCK_TIMEOUT = 10

@@ -56,6 +59,14 @@ class SimpleConfigReader(object):
     self._last_inode = None
     self._last_mtime = None
     self._last_size = None
     self._last_inode = None
     self._last_mtime = None
     self._last_size = None

+
+    self._config_data = None
+    self._inst_ips_by_link = None
+    self._ip_to_inst_by_link = None
+    self._instances_ips = None
+    self._mc_primary_ips = None
+    self._nodes_primary_ips = None
+

     # we need a forced reload at class init time, to initialize _last_*
     self._Load(force=True)
 
     # we need a forced reload at class init time, to initialize _last_*
     self._Load(force=True)
 

@@ -78,16 +89,14 @@ class SimpleConfigReader(object):
     mtime = cfg_stat.st_mtime
     size = cfg_stat.st_size
 
     mtime = cfg_stat.st_mtime
     size = cfg_stat.st_size
 

-    reload = False
-    if force or inode != self._last_inode or \
-       mtime > self._last_mtime or \
-       size != self._last_size:
+    if (force or inode != self._last_inode or
+        mtime > self._last_mtime or
+        size != self._last_size):

       self._last_inode = inode
       self._last_mtime = mtime
       self._last_size = size
       self._last_inode = inode
       self._last_mtime = mtime
       self._last_size = size

-      reload = True
-
-    if not reload:
+    else:
+      # Don't reload

       return False
 
     try:
       return False
 
     try:

@@ -99,14 +108,20 @@ class SimpleConfigReader(object):
       raise errors.ConfigurationError("Cannot load config file %s: %s" %
                                       (self._file_name, err))
 
       raise errors.ConfigurationError("Cannot load config file %s: %s" %
                                       (self._file_name, err))
 

-    self._ip_to_instance = {}
+    self._ip_to_inst_by_link = {}

     self._instances_ips = []
     self._instances_ips = []

+    self._inst_ips_by_link = {}
+    c_nparams = self._config_data['cluster']['nicparams'][constants.PP_DEFAULT]

     for iname in self._config_data['instances']:
       instance = self._config_data['instances'][iname]
       for nic in instance['nics']:
         if 'ip' in nic and nic['ip']:
     for iname in self._config_data['instances']:
       instance = self._config_data['instances'][iname]
       for nic in instance['nics']:
         if 'ip' in nic and nic['ip']:

-          self._instances_ips.append(nic['ip'])
-          self._ip_to_instance[nic['ip']] = iname
+          params = objects.FillDict(c_nparams, nic['nicparams'])
+          if not params['link'] in self._inst_ips_by_link:
+            self._inst_ips_by_link[params['link']] = []
+            self._ip_to_inst_by_link[params['link']] = {}
+          self._ip_to_inst_by_link[params['link']][nic['ip']] = iname
+          self._inst_ips_by_link[params['link']].append(nic['ip'])

 
     self._nodes_primary_ips = []
     self._mc_primary_ips = []
 
     self._nodes_primary_ips = []
     self._mc_primary_ips = []

@@ -140,6 +155,9 @@ class SimpleConfigReader(object):
   def GetFileStorageDir(self):
     return self._config_data["cluster"]["file_storage_dir"]
 
   def GetFileStorageDir(self):
     return self._config_data["cluster"]["file_storage_dir"]
 

+  def GetSharedFileStorageDir(self):
+    return self._config_data["cluster"]["shared_file_storage_dir"]
+

   def GetNodeList(self):
     return self._config_data["nodes"].keys()
 
   def GetNodeList(self):
     return self._config_data["nodes"].keys()
 

@@ -149,6 +167,12 @@ class SimpleConfigReader(object):
   def GetClusterSerialNo(self):
     return self._config_data["cluster"]["serial_no"]
 
   def GetClusterSerialNo(self):
     return self._config_data["cluster"]["serial_no"]
 

+  def GetDefaultNicParams(self):
+    return self._config_data["cluster"]["nicparams"][constants.PP_DEFAULT]
+
+  def GetDefaultNicLink(self):
+    return self.GetDefaultNicParams()[constants.NIC_LINK]
+

   def GetNodeStatusFlags(self, node):
     """Get a node's status flags
 
   def GetNodeStatusFlags(self, node):
     """Get a node's status flags
 

@@ -166,10 +190,24 @@ class SimpleConfigReader(object):
     offline = self._config_data["nodes"][node]["offline"]
     return master_candidate, drained, offline
 
     offline = self._config_data["nodes"][node]["offline"]
     return master_candidate, drained, offline
 

-  def GetInstanceByIp(self, ip):
-    if ip not in self._ip_to_instance:
+  def GetInstanceByLinkIp(self, ip, link):
+    """Get instance name from its link and ip address.
+
+    @type ip: string
+    @param ip: ip address
+    @type link: string
+    @param link: nic link
+    @rtype: string
+    @return: instance name
+
+    """
+    if not link:
+      link = self.GetDefaultNicLink()
+    if not link in self._ip_to_inst_by_link:

       return None
       return None

-    return self._ip_to_instance[ip]
+    if not ip in self._ip_to_inst_by_link[link]:
+      return None
+    return self._ip_to_inst_by_link[link][ip]

 
   def GetNodePrimaryIp(self, node):
     """Get a node's primary ip
 
   def GetNodePrimaryIp(self, node):
     """Get a node's primary ip

@@ -203,8 +241,22 @@ class SimpleConfigReader(object):
   def GetMasterCandidatesPrimaryIps(self):
     return self._mc_primary_ips
 
   def GetMasterCandidatesPrimaryIps(self):
     return self._mc_primary_ips
 

-  def GetInstancesIps(self):
-    return self._instances_ips
+  def GetInstancesIps(self, link):
+    """Get list of nic ips connected to a certain link.
+
+    @type link: string
+    @param link: nic link
+    @rtype: list
+    @return: list of ips connected to that link
+
+    """
+    if not link:
+      link = self.GetDefaultNicLink()
+
+    if link in self._inst_ips_by_link:
+      return self._inst_ips_by_link[link]
+    else:
+      return []

 
 
 class SimpleStore(object):
 
 
 class SimpleStore(object):

@@ -223,6 +275,7 @@ class SimpleStore(object):
     constants.SS_CLUSTER_NAME,
     constants.SS_CLUSTER_TAGS,
     constants.SS_FILE_STORAGE_DIR,
     constants.SS_CLUSTER_NAME,
     constants.SS_CLUSTER_TAGS,
     constants.SS_FILE_STORAGE_DIR,

+    constants.SS_SHARED_FILE_STORAGE_DIR,

     constants.SS_MASTER_CANDIDATES,
     constants.SS_MASTER_CANDIDATES_IPS,
     constants.SS_MASTER_IP,
     constants.SS_MASTER_CANDIDATES,
     constants.SS_MASTER_CANDIDATES_IPS,
     constants.SS_MASTER_IP,

@@ -233,8 +286,13 @@ class SimpleStore(object):
     constants.SS_NODE_SECONDARY_IPS,
     constants.SS_OFFLINE_NODES,
     constants.SS_ONLINE_NODES,
     constants.SS_NODE_SECONDARY_IPS,
     constants.SS_OFFLINE_NODES,
     constants.SS_ONLINE_NODES,

+    constants.SS_PRIMARY_IP_FAMILY,

     constants.SS_INSTANCE_LIST,
     constants.SS_RELEASE_VERSION,
     constants.SS_INSTANCE_LIST,
     constants.SS_RELEASE_VERSION,

+    constants.SS_HYPERVISOR_LIST,
+    constants.SS_MAINTAIN_NODE_HEALTH,
+    constants.SS_UID_POOL,
+    constants.SS_NODEGROUPS,

     )
   _MAX_SIZE = 131072
 
     )
   _MAX_SIZE = 131072
 

@@ -255,7 +313,7 @@ class SimpleStore(object):
     filename = self._cfg_dir + '/' + self._SS_FILEPREFIX + key
     return filename
 
     filename = self._cfg_dir + '/' + self._SS_FILEPREFIX + key
     return filename
 

-  def _ReadFile(self, key):
+  def _ReadFile(self, key, default=None):

     """Generic routine to read keys.
 
     This will read the file which holds the value requested. Errors
     """Generic routine to read keys.
 
     This will read the file which holds the value requested. Errors

@@ -266,6 +324,8 @@ class SimpleStore(object):
     try:
       data = utils.ReadFile(filename, size=self._MAX_SIZE)
     except EnvironmentError, err:
     try:
       data = utils.ReadFile(filename, size=self._MAX_SIZE)
     except EnvironmentError, err:

+      if err.errno == errno.ENOENT and default is not None:
+        return default

       raise errors.ConfigurationError("Can't read from the ssconf file:"
                                       " '%s'" % str(err))
     data = data.rstrip('\n')
       raise errors.ConfigurationError("Can't read from the ssconf file:"
                                       " '%s'" % str(err))
     data = data.rstrip('\n')

@@ -278,7 +338,7 @@ class SimpleStore(object):
     @param values: Dictionary of (name, value)
 
     """
     @param values: Dictionary of (name, value)
 
     """

-    ssconf_lock = utils.FileLock(constants.SSCONF_LOCK_FILE)
+    ssconf_lock = utils.FileLock.Open(constants.SSCONF_LOCK_FILE)

 
     # Get lock while writing files
     ssconf_lock.Exclusive(blocking=True, timeout=SSCONF_LOCK_TIMEOUT)
 
     # Get lock while writing files
     ssconf_lock.Exclusive(blocking=True, timeout=SSCONF_LOCK_TIMEOUT)

@@ -286,6 +346,9 @@ class SimpleStore(object):
       for name, value in values.iteritems():
         if value and not value.endswith("\n"):
           value += "\n"
       for name, value in values.iteritems():
         if value and not value.endswith("\n"):
           value += "\n"

+        if len(value) > self._MAX_SIZE:
+          raise errors.ConfigurationError("ssconf file %s above maximum size" %
+                                          name)

         utils.WriteFile(self.KeyToFilename(name), data=value, mode=0444)
     finally:
       ssconf_lock.Unlock()
         utils.WriteFile(self.KeyToFilename(name), data=value, mode=0444)
     finally:
       ssconf_lock.Unlock()

@@ -310,6 +373,12 @@ class SimpleStore(object):
     """
     return self._ReadFile(constants.SS_FILE_STORAGE_DIR)
 
     """
     return self._ReadFile(constants.SS_FILE_STORAGE_DIR)
 

+  def GetSharedFileStorageDir(self):
+    """Get the shared file storage dir.
+
+    """
+    return self._ReadFile(constants.SS_SHARED_FILE_STORAGE_DIR)
+

   def GetMasterCandidates(self):
     """Return the list of master candidates.
 
   def GetMasterCandidates(self):
     """Return the list of master candidates.
 

@@ -368,6 +437,14 @@ class SimpleStore(object):
     nl = data.splitlines(False)
     return nl
 
     nl = data.splitlines(False)
     return nl
 

+  def GetNodegroupList(self):
+    """Return the list of nodegroups.
+
+    """
+    data = self._ReadFile(constants.SS_NODEGROUPS)
+    nl = data.splitlines(False)
+    return nl
+

   def GetClusterTags(self):
     """Return the cluster tags.
 
   def GetClusterTags(self):
     """Return the cluster tags.
 

@@ -376,6 +453,47 @@ class SimpleStore(object):
     nl = data.splitlines(False)
     return nl
 
     nl = data.splitlines(False)
     return nl
 

+  def GetHypervisorList(self):
+    """Return the list of enabled hypervisors.
+
+    """
+    data = self._ReadFile(constants.SS_HYPERVISOR_LIST)
+    nl = data.splitlines(False)
+    return nl
+
+  def GetMaintainNodeHealth(self):
+    """Return the value of the maintain_node_health option.
+
+    """
+    data = self._ReadFile(constants.SS_MAINTAIN_NODE_HEALTH)
+    # we rely on the bool serialization here
+    return data == "True"
+
+  def GetUidPool(self):
+    """Return the user-id pool definition string.
+
+    The separator character is a newline.
+
+    The return value can be parsed using uidpool.ParseUidPool()::
+
+      ss = ssconf.SimpleStore()
+      uid_pool = uidpool.ParseUidPool(ss.GetUidPool(), separator="\\n")
+
+    """
+    data = self._ReadFile(constants.SS_UID_POOL)
+    return data
+
+  def GetPrimaryIPFamily(self):
+    """Return the cluster-wide primary address family.
+
+    """
+    try:
+      return int(self._ReadFile(constants.SS_PRIMARY_IP_FAMILY,
+                                default=netutils.IP4Address.family))
+    except (ValueError, TypeError), err:
+      raise errors.ConfigurationError("Error while trying to parse primary ip"
+                                      " family: %s" % err)
+

 
 def GetMasterAndMyself(ss=None):
   """Get the master node and my own hostname.
 
 def GetMasterAndMyself(ss=None):
   """Get the master node and my own hostname.

@@ -394,7 +512,7 @@ def GetMasterAndMyself(ss=None):
   """
   if ss is None:
     ss = SimpleStore()
   """
   if ss is None:
     ss = SimpleStore()

-  return ss.GetMasterNode(), utils.HostInfo().name
+  return ss.GetMasterNode(), netutils.Hostname.GetSysName()

 
 
 def CheckMaster(debug, ss=None):
 
 
 def CheckMaster(debug, ss=None):

@@ -417,29 +535,3 @@ def CheckMaster(debug, ss=None):
     if debug:
       sys.stderr.write("Not master, exiting.\n")
     sys.exit(constants.EXIT_NOTMASTER)
     if debug:
       sys.stderr.write("Not master, exiting.\n")
     sys.exit(constants.EXIT_NOTMASTER)

-
-
-def CheckMasterCandidate(debug, ss=None):
-  """Checks the node setup.
-
-  If this is a master candidate, the function will return. Otherwise it will
-  exit with an exit code based on the node status.
-
-  """
-  try:
-    if ss is None:
-      ss = SimpleStore()
-    myself = utils.HostInfo().name
-    candidates = ss.GetMasterCandidates()
-  except errors.ConfigurationError, err:
-    print "Cluster configuration incomplete: '%s'" % str(err)
-    sys.exit(constants.EXIT_NODESETUP_ERROR)
-  except errors.ResolverError, err:
-    sys.stderr.write("Cannot resolve my own name (%s)\n" % err.args[0])
-    sys.exit(constants.EXIT_NODESETUP_ERROR)
-
-  if myself not in candidates:
-    if debug:
-      sys.stderr.write("Not master candidate, exiting.\n")
-    sys.exit(constants.EXIT_NOTCANDIDATE)
-