LUClusterSetParams: When ipolicy is updated warn for new violations

[ganeti-local] / lib / ssconf.py

diff --git a/lib/ssconf.py b/lib/ssconf.py
index c36aa65..babd148 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

@@ -28,16 +28,20 @@ configuration data, which is mostly static and available to all nodes.
 
 import sys
 import re
 
 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
 

-RE_VALID_SSCONF_NAME = re.compile(r'^[-_a-z0-9]+$')
+RE_VALID_SSCONF_NAME = re.compile(r"^[-_a-z0-9]+$")

 
 
 class SimpleConfigReader(object):
 
 
 class SimpleConfigReader(object):

@@ -52,8 +56,86 @@ class SimpleConfigReader(object):
 
     """
     self._file_name = file_name
 
     """
     self._file_name = file_name

-    self._config_data = serializer.Load(utils.ReadFile(file_name))
-    # TODO: Error handling
+    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)
+
+  def _Load(self, force=False):
+    """Loads (or reloads) the config file.
+
+    @type force: boolean
+    @param force: whether to force the reload without checking the mtime
+    @rtype: boolean
+    @return: boolean value that says whether we reloaded the configuration or
+             not (because we decided it was already up-to-date)
+
+    """
+    try:
+      cfg_stat = os.stat(self._file_name)
+    except EnvironmentError, err:
+      raise errors.ConfigurationError("Cannot stat config file %s: %s" %
+                                      (self._file_name, err))
+    inode = cfg_stat.st_ino
+    mtime = cfg_stat.st_mtime
+    size = cfg_stat.st_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
+    else:
+      # Don't reload
+      return False
+
+    try:
+      self._config_data = serializer.Load(utils.ReadFile(self._file_name))
+    except EnvironmentError, err:
+      raise errors.ConfigurationError("Cannot read config file %s: %s" %
+                                      (self._file_name, err))
+    except ValueError, err:
+      raise errors.ConfigurationError("Cannot load config file %s: %s" %
+                                      (self._file_name, err))
+
+    self._ip_to_inst_by_link = {}
+    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"]:
+          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 = []
+    for node_name in self._config_data["nodes"]:
+      node = self._config_data["nodes"][node_name]
+      self._nodes_primary_ips.append(node["primary_ip"])
+      if node["master_candidate"]:
+        self._mc_primary_ips.append(node["primary_ip"])
+
+    return True
+
+  # Clients can request a reload of the config file, so we export our internal
+  # _Load function as Reload.
+  Reload = _Load

 
   def GetClusterName(self):
     return self._config_data["cluster"]["cluster_name"]
 
   def GetClusterName(self):
     return self._config_data["cluster"]["cluster_name"]

@@ -70,46 +152,114 @@ class SimpleConfigReader(object):
   def GetMasterNetdev(self):
     return self._config_data["cluster"]["master_netdev"]
 
   def GetMasterNetdev(self):
     return self._config_data["cluster"]["master_netdev"]
 

+  def GetMasterNetmask(self):
+    return self._config_data["cluster"]["master_netmask"]
+

   def GetFileStorageDir(self):
     return self._config_data["cluster"]["file_storage_dir"]
 
   def GetFileStorageDir(self):
     return self._config_data["cluster"]["file_storage_dir"]
 

-  def GetHypervisorType(self):
-    return self._config_data["cluster"]["hypervisor"]
+  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()
 

-  @classmethod
-  def FromDict(cls, val, cfg_file=constants.CLUSTER_CONF_FILE):
-    """Alternative construction from a dictionary.
+  def GetConfigSerialNo(self):
+    return self._config_data["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
+
+    @type node: string
+    @param node: node name
+    @rtype: (bool, bool, bool)
+    @return: (master_candidate, drained, offline) (or None if no such node)

 
     """
 
     """

-    obj = SimpleConfigReader.__new__(cls)
-    obj._config_data = val
-    obj._file_name = cfg_file
-    return obj
+    if node not in self._config_data["nodes"]:
+      return None

 
 

+    master_candidate = self._config_data["nodes"][node]["master_candidate"]
+    drained = self._config_data["nodes"][node]["drained"]
+    offline = self._config_data["nodes"][node]["offline"]
+    return master_candidate, drained, offline

 
 

-class SimpleConfigWriter(SimpleConfigReader):
-  """Simple class to write configuration file.
+  def GetInstanceByLinkIp(self, ip, link):
+    """Get instance name from its link and ip address.

 
 

-  """
-  def SetMasterNode(self, node):
-    """Change master node.
+    @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
+    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
+
+    @type node: string
+    @param node: node name
+    @rtype: string, or None
+    @return: node's primary ip, or None if no such node
+
+    """
+    if node not in self._config_data["nodes"]:
+      return None
+    return self._config_data["nodes"][node]["primary_ip"]
+
+  def GetInstancePrimaryNode(self, instance):
+    """Get an instance's primary node
+
+    @type instance: string
+    @param instance: instance name
+    @rtype: string, or None
+    @return: primary node, or None if no such instance

 
     """
 
     """

-    self._config_data["cluster"]["master_node"] = node
+    if instance not in self._config_data["instances"]:
+      return None
+    return self._config_data["instances"][instance]["primary_node"]

 
 

-  def Save(self):
-    """Writes configuration file.
+  def GetNodesPrimaryIps(self):
+    return self._nodes_primary_ips

 
 

-    Warning: Doesn't take care of locking or synchronizing with other
-    processes.
+  def GetMasterCandidatesPrimaryIps(self):
+    return self._mc_primary_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

 
     """
 
     """

-    utils.WriteFile(self._file_name,
-                    data=serializer.Dump(self._config_data),
-                    mode=0600)
+    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):

@@ -126,12 +276,27 @@ class SimpleStore(object):
   _SS_FILEPREFIX = "ssconf_"
   _VALID_KEYS = (
     constants.SS_CLUSTER_NAME,
   _SS_FILEPREFIX = "ssconf_"
   _VALID_KEYS = (
     constants.SS_CLUSTER_NAME,

+    constants.SS_CLUSTER_TAGS,

     constants.SS_FILE_STORAGE_DIR,
     constants.SS_FILE_STORAGE_DIR,

+    constants.SS_SHARED_FILE_STORAGE_DIR,

     constants.SS_MASTER_CANDIDATES,
     constants.SS_MASTER_CANDIDATES,

+    constants.SS_MASTER_CANDIDATES_IPS,

     constants.SS_MASTER_IP,
     constants.SS_MASTER_NETDEV,
     constants.SS_MASTER_IP,
     constants.SS_MASTER_NETDEV,

+    constants.SS_MASTER_NETMASK,

     constants.SS_MASTER_NODE,
     constants.SS_NODE_LIST,
     constants.SS_MASTER_NODE,
     constants.SS_NODE_LIST,

+    constants.SS_NODE_PRIMARY_IPS,
+    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_HYPERVISOR_LIST,
+    constants.SS_MAINTAIN_NODE_HEALTH,
+    constants.SS_UID_POOL,
+    constants.SS_NODEGROUPS,

     )
   _MAX_SIZE = 131072
 
     )
   _MAX_SIZE = 131072
 

@@ -149,10 +314,10 @@ class SimpleStore(object):
       raise errors.ProgrammerError("Invalid key requested from SSConf: '%s'"
                                    % str(key))
 
       raise errors.ProgrammerError("Invalid key requested from SSConf: '%s'"
                                    % str(key))
 

-    filename = self._cfg_dir + '/' + self._SS_FILEPREFIX + key
+    filename = self._cfg_dir + "/" + self._SS_FILEPREFIX + key

     return filename
 
     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

@@ -161,15 +326,13 @@ class SimpleStore(object):
     """
     filename = self.KeyToFilename(key)
     try:
     """
     filename = self.KeyToFilename(key)
     try:

-      fh = file(filename, 'r')
-      try:
-        data = fh.read(self._MAX_SIZE)
-        data = data.rstrip('\n')
-      finally:
-        fh.close()
+      data = utils.ReadFile(filename, size=self._MAX_SIZE)

     except EnvironmentError, err:
     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))
       raise errors.ConfigurationError("Can't read from the ssconf file:"
                                       " '%s'" % str(err))

+    data = data.rstrip("\n")

     return data
 
   def WriteFiles(self, values):
     return data
 
   def WriteFiles(self, values):

@@ -179,7 +342,7 @@ 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)

@@ -187,7 +350,11 @@ 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"

-        utils.WriteFile(self.KeyToFilename(name), data=value)
+        if len(value) > self._MAX_SIZE:
+          raise errors.ConfigurationError("ssconf file %s above maximum size" %
+                                          name)
+        utils.WriteFile(self.KeyToFilename(name), data=value,
+                        mode=constants.SS_FILE_PERMS)

     finally:
       ssconf_lock.Unlock()
 
     finally:
       ssconf_lock.Unlock()
 

@@ -211,6 +378,12 @@ 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.
 

@@ -219,6 +392,14 @@ class SimpleStore(object):
     nl = data.splitlines(False)
     return nl
 
     nl = data.splitlines(False)
     return nl
 

+  def GetMasterCandidatesIPList(self):
+    """Return the list of master candidates' primary IP.
+
+    """
+    data = self._ReadFile(constants.SS_MASTER_CANDIDATES_IPS)
+    nl = data.splitlines(False)
+    return nl
+

   def GetMasterIP(self):
     """Get the IP of the master node for this cluster.
 
   def GetMasterIP(self):
     """Get the IP of the master node for this cluster.
 

@@ -231,6 +412,17 @@ class SimpleStore(object):
     """
     return self._ReadFile(constants.SS_MASTER_NETDEV)
 
     """
     return self._ReadFile(constants.SS_MASTER_NETDEV)
 

+  def GetMasterNetmask(self):
+    """Get the master netmask.
+
+    """
+    try:
+      return self._ReadFile(constants.SS_MASTER_NETMASK)
+    except errors.ConfigurationError:
+      family = self.GetPrimaryIPFamily()
+      ipcls = netutils.IPAddress.GetClassFromIpFamily(family)
+      return ipcls.iplen
+

   def GetMasterNode(self):
     """Get the hostname of the master node for this cluster.
 
   def GetMasterNode(self):
     """Get the hostname of the master node for this cluster.
 

@@ -245,6 +437,79 @@ class SimpleStore(object):
     nl = data.splitlines(False)
     return nl
 
     nl = data.splitlines(False)
     return nl
 

+  def GetNodePrimaryIPList(self):
+    """Return the list of cluster nodes' primary IP.
+
+    """
+    data = self._ReadFile(constants.SS_NODE_PRIMARY_IPS)
+    nl = data.splitlines(False)
+    return nl
+
+  def GetNodeSecondaryIPList(self):
+    """Return the list of cluster nodes' secondary IP.
+
+    """
+    data = self._ReadFile(constants.SS_NODE_SECONDARY_IPS)
+    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.
+
+    """
+    data = self._ReadFile(constants.SS_CLUSTER_TAGS)
+    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.

@@ -263,7 +528,7 @@ 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):