def validate_rebuild_required(session, path, param_holder):
""" check if this parameter requires hosts to be in non-ready state
"""
q = session.query(Host)
dbready = Ready.get_instance(session)
dbalmostready = Almostready.get_instance(session)
q = q.filter(or_(Host.status == dbready, Host.status == dbalmostready))
personality = param_holder.personality
if isinstance(param_holder, PersonalityParameter):
q = q.filter_by(personality=personality)
if q.count():
raise ArgumentError("Modifying parameter %s value needs a host rebuild. "
"There are hosts associated to the personality in non-ready state. "
"Please set these host to status of rebuild to continue. "
"Run 'aq search host --personality %s --buildstatus ready' "
"and 'aq search host --personality %s --buildstatus almostready' to "
"get the list of the affected hosts." %
(path, personality, personality))
def onLeave(self, dbcluster):
dbalmostready = HostAlmostready.get_instance(object_session(dbcluster))
for dbhost in dbcluster.hosts:
if dbhost.status.name == 'ready':
dbhost.status.transition(dbhost, dbalmostready)
def render(self, session, logger, hostname, cluster,
personality, **arguments):
dbhost = hostname_to_host(session, hostname)
dbcluster = Cluster.get_unique(session, cluster, compel=True)
if dbcluster.status.name == 'decommissioned':
raise ArgumentError("Cannot add hosts to decommissioned clusters.")
# We only support changing personality within the same
# archetype. The archetype decides things like which OS, how
# it builds (dhcp, etc), whether it's compilable, and
# switching all of that by side-effect seems wrong
# somehow. And besides, it would make the user-interface and
# implementation for this command ugly in order to support
# changing all of those options.
personality_change = False
if personality is not None:
dbpersonality = Personality.get_unique(session,
name=personality,
archetype=dbhost.archetype,
compel=True)
if dbhost.personality != dbpersonality:
dbhost.personality = dbpersonality
personality_change = True
# Allow for non-restricted clusters (the default?)
if (len(dbcluster.allowed_personalities) > 0 and
dbhost.personality not in dbcluster.allowed_personalities):
raise ArgumentError("The personality %s for %s is not allowed "
"by the cluster. Specify --personality "
"and provide one of %s" %
(dbhost.personality, dbhost.fqdn,
", ".join([x.name for x in
dbcluster.allowed_personalities])))
# Now that we've changed the personality, we can check
# if this is a valid membership change
dbcluster.validate_membership(dbhost)
plenaries = PlenaryCollection(logger=logger)
plenaries.append(Plenary.get_plenary(dbcluster))
if dbhost.cluster and dbhost.cluster != dbcluster:
logger.client_info("Removing {0:l} from {1:l}.".format(dbhost,
dbhost.cluster))
old_cluster = dbhost.cluster
old_cluster.hosts.remove(dbhost)
remove_service_addresses(old_cluster, dbhost)
old_cluster.validate()
session.expire(dbhost, ['_cluster'])
plenaries.append(Plenary.get_plenary(old_cluster))
# Apply the service addresses to the new member
for res in walk_resources(dbcluster):
if not isinstance(res, ServiceAddress):
continue
apply_service_address(dbhost, res.interfaces, res, logger)
if dbhost.cluster:
if personality_change:
raise ArgumentError("{0:l} already in {1:l}, use "
"aq reconfigure to change personality."
.format(dbhost, dbhost.cluster))
# the cluster has not changed, therefore there's nothing
# to do here.
return
# Calculate the node index: build a map of all possible values, remove
# the used ones, and pick the smallest remaining one
node_index_map = set(xrange(len(dbcluster._hosts) + 1))
for link in dbcluster._hosts:
# The cluster may have been bigger in the past, so node indexes may
# be larger than the current cluster size
try:
node_index_map.remove(link.node_index)
except KeyError:
pass
dbcluster.hosts.append((dbhost, min(node_index_map)))
dbcluster.validate()
# demote a host when switching clusters
# promote a host when switching clusters
if dbhost.status.name == 'ready':
if dbcluster.status.name != 'ready':
dbalmost = HostAlmostready.get_instance(session)
dbhost.status.transition(dbhost, dbalmost)
plenaries.append(Plenary.get_plenary(dbhost))
elif dbhost.status.name == 'almostready':
if dbcluster.status.name == 'ready':
dbready = HostReady.get_instance(session)
dbhost.status.transition(dbhost, dbready)
plenaries.append(Plenary.get_plenary(dbhost))
session.flush()
# Enforce that service instances are set correctly for the
# new cluster association.
chooser = Chooser(dbhost, logger=logger)
chooser.set_required()
chooser.flush_changes()
# the chooser will include the host plenary
with CompileKey.merge([chooser.get_key(), plenaries.get_key()]):
plenaries.stash()
try:
chooser.write_plenary_templates(locked=True)
plenaries.write(locked=True)
except:
chooser.restore_stash()
plenaries.restore_stash()
raise
return