def cluster_changed():
# Need to make sure hostname is excluded to build inclusion list (paying
# attention to those excluded by default in peer_echo().
# TODO(dosaboy): extend peer_echo() to support providing exclusion list as
# well as inclusion list.
# NOTE(jamespage): deprecated - leader-election
rdata = relation_get()
inc_list = []
for attr in rdata.keys():
if attr not in [
'hostname', 'private-address', 'cluster-address',
'public-address', 'ready'
]:
inc_list.append(attr)
peer_echo(includes=inc_list)
# NOTE(jamespage): deprecated - leader-election
maybe_notify_bootstrapped()
cluster_joined()
config_changed()
if is_bootstrapped() and not seeded():
mark_seeded()
def config_changed():
# if we are paused, delay doing any config changed hooks. It is forced on
# the resume.
if is_unit_paused_set():
return
if config('prefer-ipv6'):
assert_charm_supports_ipv6()
hosts = get_cluster_hosts()
clustered = len(hosts) > 1
bootstrapped = is_bootstrapped()
# NOTE: only configure the cluster if we have sufficient peers. This only
# applies if min-cluster-size is provided and is used to avoid extraneous
# configuration changes and premature bootstrapping as the cluster is
# deployed.
if is_sufficient_peers():
try:
# NOTE(jamespage): try with leadership election
if is_leader():
log("Leader unit - bootstrap required=%s" % (not bootstrapped),
DEBUG)
render_config_restart_on_changed(clustered, hosts,
bootstrap=not bootstrapped)
elif bootstrapped:
log("Cluster is bootstrapped - configuring mysql on this node",
DEBUG)
render_config_restart_on_changed(clustered, hosts)
else:
log("Not configuring", DEBUG)
except NotImplementedError:
# NOTE(jamespage): fallback to legacy behaviour.
oldest = oldest_peer(peer_units())
if oldest:
log("Leader unit - bootstrap required=%s" % (not bootstrapped),
DEBUG)
render_config_restart_on_changed(clustered, hosts,
bootstrap=not bootstrapped)
elif bootstrapped:
log("Cluster is bootstrapped - configuring mysql on this node",
DEBUG)
render_config_restart_on_changed(clustered, hosts)
else:
log("Not configuring", DEBUG)
# Notify any changes to the access network
update_shared_db_rels()
# (re)install pcmkr agent
install_mysql_ocf()
if relation_ids('ha'):
# make sure all the HA resources are (re)created
ha_relation_joined()
if is_relation_made('nrpe-external-master'):
update_nrpe_config()
def upgrade():
check_bootstrap = False
try:
if is_leader():
check_bootstrap = True
except:
if oldest_peer(peer_units()):
check_bootstrap = True
if check_bootstrap and not is_bootstrapped() and is_sufficient_peers():
# If this is the leader but we have not yet broadcast the cluster uuid
# then do so now.
wsrep_ready = get_wsrep_value('wsrep_ready') or ""
if wsrep_ready.lower() in ['on', 'ready']:
cluster_state_uuid = get_wsrep_value('wsrep_cluster_state_uuid')
if cluster_state_uuid:
mark_seeded()
notify_bootstrapped(cluster_uuid=cluster_state_uuid)
config_changed()
def config_changed():
# It is critical that the installation is attempted first before any
# rendering of the configuration files occurs.
# install_percona_xtradb_cluster has the code to decide if this is the
# leader or if the leader is bootstrapped and therefore ready for install.
install_percona_xtradb_cluster()
# if we are paused, delay doing any config changed hooks. It is forced on
# the resume.
if is_unit_paused_set():
return
if config('prefer-ipv6'):
assert_charm_supports_ipv6()
hosts = get_cluster_hosts()
leader_bootstrapped = is_leader_bootstrapped()
leader_ip = leader_get('leader-ip')
if is_leader():
# If the cluster has not been fully bootstrapped once yet, use an empty
# hosts list to avoid restarting the leader node's mysqld during
# cluster buildup.
# After, the cluster has bootstrapped at least one time, it is much
# less likely to have restart collisions. It is then safe to use the
# full hosts list and have the leader node's mysqld restart.
if not clustered_once():
hosts = []
log("Leader unit - bootstrap required=%s" % (not leader_bootstrapped),
DEBUG)
render_config_restart_on_changed(hosts,
bootstrap=not leader_bootstrapped)
elif leader_bootstrapped and is_sufficient_peers():
# Speed up cluster process by bootstrapping when the leader has
# bootstrapped if we have expected number of peers
if leader_ip not in hosts:
# Fix Bug #1738896
hosts = [leader_ip] + hosts
log("Leader is bootstrapped - configuring mysql on this node", DEBUG)
# Rendering the mysqld.cnf and restarting is bootstrapping for a
# non-leader node.
render_config_restart_on_changed(hosts)
# Assert we are bootstrapped. This will throw an
# InconsistentUUIDError exception if UUIDs do not match.
update_bootstrap_uuid()
else:
# Until the bootstrap-uuid attribute is set by the leader,
# cluster_ready() will evaluate to False. So it is necessary to
# feed this information to the user.
status_set('waiting', "Waiting for bootstrap-uuid set by leader")
log('Non-leader waiting on leader bootstrap, skipping render', DEBUG)
return
# Notify any changes to the access network
update_client_db_relations()
# (re)install pcmkr agent
install_mysql_ocf()
for rid in relation_ids('ha'):
# make sure all the HA resources are (re)created
ha_relation_joined(relation_id=rid)
if is_relation_made('nrpe-external-master'):
update_nrpe_config()
open_port(DEFAULT_MYSQL_PORT)
# the password needs to be updated only if the node was already
# bootstrapped
if is_bootstrapped():
update_root_password()
set_ready_on_peers()
def test_is_bootstrapped(self, mock_is_sufficient_peers):
kvstore = mock.MagicMock()
kvstore.get.return_value = False
self.kv.return_value = kvstore
# Not sufficient number of peers
mock_is_sufficient_peers.return_value = False
self.assertFalse(percona_utils.is_bootstrapped())
# Not all cluster ready
mock_is_sufficient_peers.return_value = True
self.relation_ids.return_value = ['cluster:0']
self.related_units.return_value = ['test/0', 'test/1']
self.relation_get.return_value = False
_config = {'min-cluster-size': 3}
self.config.side_effect = lambda key: _config.get(key)
self.assertFalse(percona_utils.is_bootstrapped())
# kvstore.set has not been called with incomplete clusters
kvstore.set.assert_not_called()
# All cluster ready
mock_is_sufficient_peers.return_value = True
self.relation_ids.return_value = ['cluster:0']
self.related_units.return_value = ['test/0', 'test/1']
self.relation_get.return_value = 'UUID'
_config = {'min-cluster-size': 3}
self.config.side_effect = lambda key: _config.get(key)
self.assertTrue(percona_utils.is_bootstrapped())
kvstore.set.assert_called_once_with(key='initial-cluster-complete',
value=True)
# Now set the key for clustered at least once
kvstore.get.return_value = True
kvstore.set.reset_mock()
# Not all cluster ready no min-cluster-size
mock_is_sufficient_peers.return_value = True
self.relation_ids.return_value = ['cluster:0']
self.related_units.return_value = ['test/0', 'test/1']
self.relation_get.return_value = False
_config = {'min-cluster-size': None}
self.config.side_effect = lambda key: _config.get(key)
self.assertFalse(percona_utils.is_bootstrapped())
kvstore.set.assert_not_called()
# All cluster ready no min-cluster-size
mock_is_sufficient_peers.return_value = True
self.relation_ids.return_value = ['cluster:0']
self.related_units.return_value = ['test/0', 'test/1']
self.relation_get.return_value = 'UUID'
_config = {'min-cluster-size': None}
self.config.side_effect = lambda key: _config.get(key)
self.assertTrue(percona_utils.is_bootstrapped())
# Assume single unit no-min-cluster-size
mock_is_sufficient_peers.return_value = True
self.relation_ids.return_value = []
self.related_units.return_value = []
self.relation_get.return_value = None
_config = {'min-cluster-size': None}
self.config.side_effect = lambda key: _config.get(key)
self.assertTrue(percona_utils.is_bootstrapped())
def config_changed():
# if we are paused or upgrading, delay doing any config changed hooks.
# It is forced on the resume.
if is_unit_paused_set() or is_unit_upgrading_set():
log("Unit is paused or upgrading. Skipping config_changed", "WARN")
return
# It is critical that the installation is attempted first before any
# rendering of the configuration files occurs.
# install_percona_xtradb_cluster has the code to decide if this is the
# leader or if the leader is bootstrapped and therefore ready for install.
install_percona_xtradb_cluster()
if config('prefer-ipv6'):
assert_charm_supports_ipv6()
hosts = get_cluster_hosts()
leader_bootstrapped = is_leader_bootstrapped()
leader_ip = leader_get('leader-ip')
# Cluster upgrade adds some complication
cluster_series_upgrading = leader_get("cluster_series_upgrading")
if cluster_series_upgrading:
leader = (leader_get('cluster_series_upgrade_leader') ==
get_relation_ip('cluster'))
leader_ip = leader_get('cluster_series_upgrade_leader')
else:
leader = is_leader()
leader_ip = leader_get('leader-ip')
if leader:
# If the cluster has not been fully bootstrapped once yet, use an empty
# hosts list to avoid restarting the leader node's mysqld during
# cluster buildup.
# After, the cluster has bootstrapped at least one time, it is much
# less likely to have restart collisions. It is then safe to use the
# full hosts list and have the leader node's mysqld restart.
# Empty hosts if cluster_series_upgrading
if not clustered_once() or cluster_series_upgrading:
hosts = []
log("Leader unit - bootstrap required=%s" % (not leader_bootstrapped),
DEBUG)
render_config_restart_on_changed(hosts,
bootstrap=not leader_bootstrapped)
elif (leader_bootstrapped and
is_sufficient_peers() and not
cluster_series_upgrading):
# Skip if cluster_series_upgrading
# Speed up cluster process by bootstrapping when the leader has
# bootstrapped if we have expected number of peers
if leader_ip not in hosts:
# Fix Bug #1738896
hosts = [leader_ip] + hosts
log("Leader is bootstrapped - configuring mysql on this node",
DEBUG)
# Rendering the mysqld.cnf and restarting is bootstrapping for a
# non-leader node.
render_config_restart_on_changed(hosts)
# Assert we are bootstrapped. This will throw an
# InconsistentUUIDError exception if UUIDs do not match.
update_bootstrap_uuid()
else:
# Until the bootstrap-uuid attribute is set by the leader,
# cluster_ready() will evaluate to False. So it is necessary to
# feed this information to the user.
status_set('waiting', "Waiting for bootstrap-uuid set by leader")
log('Non-leader waiting on leader bootstrap, skipping render',
DEBUG)
return
# Notify any changes to the access network
update_client_db_relations()
# (re)install pcmkr agent
install_mysql_ocf()
for rid in relation_ids('ha'):
# make sure all the HA resources are (re)created
ha_relation_joined(relation_id=rid)
if is_relation_made('nrpe-external-master'):
update_nrpe_config()
open_port(DEFAULT_MYSQL_PORT)
# the password needs to be updated only if the node was already
# bootstrapped
if is_bootstrapped():
update_root_password()
set_ready_on_peers()
# NOTE(tkurek): re-set 'master' relation data
if relation_ids('master'):
master_joined()