import sys
import re
+import os
from ganeti import errors
from ganeti import constants
"""
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
+ # 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
+
+ reload = False
+ 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
+ reload = True
+
+ if not 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_instance = {}
+ 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._ip_to_instance[nic['ip']] = iname
+
+ 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 GetFileStorageDir(self):
return self._config_data["cluster"]["file_storage_dir"]
- def GetHypervisorType(self):
- return self._config_data["cluster"]["hypervisor"]
-
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 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 GetInstanceByIp(self, ip):
+ if ip not in self._ip_to_instance:
+ return None
+ return self._ip_to_instance[ip]
- """
- def SetMasterNode(self, node):
- """Change master node.
+ 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
"""
- self._config_data["cluster"]["master_node"] = node
+ if node not in self._config_data["nodes"]:
+ return None
+ return self._config_data["nodes"][node]["primary_ip"]
- def Save(self):
- """Writes configuration file.
+ def GetInstancePrimaryNode(self, instance):
+ """Get an instance's primary node
- Warning: Doesn't take care of locking or synchronizing with other
- processes.
+ @type instance: string
+ @param instance: instance name
+ @rtype: string, or None
+ @return: primary node, or None if no such instance
"""
- utils.WriteFile(self._file_name,
- data=serializer.Dump(self._config_data),
- mode=0600)
+ if instance not in self._config_data["instances"]:
+ return None
+ return self._config_data["instances"][instance]["primary_node"]
class SimpleStore(object):
constants.SS_CLUSTER_TAGS,
constants.SS_FILE_STORAGE_DIR,
constants.SS_MASTER_CANDIDATES,
+ constants.SS_MASTER_CANDIDATES_IPS,
constants.SS_MASTER_IP,
constants.SS_MASTER_NETDEV,
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_INSTANCE_LIST,
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.
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 GetClusterTags(self):
"""Return the cluster tags.
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)
+
projects / ganeti-local / blobdiff