X-Git-Url: https://code.grnet.gr/git/ganeti-local/blobdiff_plain/b4478d3498056633aa0280ba7afcf5b52e91b2ef..829cfbc5f050d1dc6caea0e3d3b89f4bd7055f7b:/lib/ssconf.py diff --git a/lib/ssconf.py b/lib/ssconf.py index 07a264a..187b057 100644 --- 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, 2011, 2012 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 @@ -29,24 +29,27 @@ configuration data, which is mostly static and available to all nodes. 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 objects +from ganeti import netutils +from ganeti import pathutils 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): """Simple class to read configuration file. """ - def __init__(self, file_name=constants.CLUSTER_CONF_FILE): + def __init__(self, file_name=pathutils.CLUSTER_CONF_FILE): """Initializes this class. @type file_name: string @@ -109,17 +112,17 @@ class SimpleConfigReader(object): 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']) + 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 = [] @@ -150,9 +153,15 @@ class SimpleConfigReader(object): 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 GetSharedFileStorageDir(self): + return self._config_data["cluster"]["shared_file_storage_dir"] + def GetNodeList(self): return self._config_data["nodes"].keys() @@ -186,6 +195,16 @@ class SimpleConfigReader(object): return master_candidate, drained, offline 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: @@ -227,6 +246,14 @@ class SimpleConfigReader(object): 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 + + """ if not link: link = self.GetDefaultNicLink() @@ -247,29 +274,36 @@ class SimpleStore(object): - keys are restricted to predefined values """ - _SS_FILEPREFIX = "ssconf_" _VALID_KEYS = ( 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_NETDEV, + constants.SS_MASTER_NETMASK, 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, + constants.SS_NETWORKS, ) _MAX_SIZE = 131072 def __init__(self, cfg_location=None): if cfg_location is None: - self._cfg_dir = constants.DATA_DIR + self._cfg_dir = pathutils.DATA_DIR else: self._cfg_dir = cfg_location @@ -281,10 +315,10 @@ class SimpleStore(object): raise errors.ProgrammerError("Invalid key requested from SSConf: '%s'" % str(key)) - filename = self._cfg_dir + '/' + self._SS_FILEPREFIX + key + filename = self._cfg_dir + "/" + constants.SSCONF_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 @@ -295,9 +329,11 @@ class SimpleStore(object): 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') + data = data.rstrip("\n") return data def WriteFiles(self, values): @@ -307,7 +343,7 @@ class SimpleStore(object): @param values: Dictionary of (name, value) """ - ssconf_lock = utils.FileLock.Open(constants.SSCONF_LOCK_FILE) + ssconf_lock = utils.FileLock.Open(pathutils.SSCONF_LOCK_FILE) # Get lock while writing files ssconf_lock.Exclusive(blocking=True, timeout=SSCONF_LOCK_TIMEOUT) @@ -315,7 +351,11 @@ class SimpleStore(object): for name, value in values.iteritems(): if value and not value.endswith("\n"): value += "\n" - utils.WriteFile(self.KeyToFilename(name), data=value, mode=0444) + 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() @@ -339,6 +379,12 @@ class SimpleStore(object): """ 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. @@ -367,6 +413,17 @@ class SimpleStore(object): """ 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. @@ -397,6 +454,22 @@ class SimpleStore(object): 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 GetNetworkList(self): + """Return the list of networks. + + """ + data = self._ReadFile(constants.SS_NETWORKS) + nl = data.splitlines(False) + return nl + def GetClusterTags(self): """Return the cluster tags. @@ -405,6 +478,56 @@ class SimpleStore(object): 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 WriteSsconfFiles(values): + """Update all ssconf files. + + Wrapper around L{SimpleStore.WriteFiles}. + + """ + SimpleStore().WriteFiles(values) + def GetMasterAndMyself(ss=None): """Get the master node and my own hostname. @@ -423,7 +546,7 @@ def GetMasterAndMyself(ss=None): """ if ss is None: ss = SimpleStore() - return ss.GetMasterNode(), utils.HostInfo().name + return ss.GetMasterNode(), netutils.Hostname.GetSysName() def CheckMaster(debug, ss=None): @@ -446,28 +569,3 @@ def CheckMaster(debug, ss=None): 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)