def upgrade():
if is_leader():
if is_unit_paused_set():
log('Unit is paused, skiping upgrade', level=INFO)
return
# broadcast the bootstrap-uuid
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)
else:
# Ensure all the peers have the bootstrap-uuid attribute set
# as this is all happening during the upgrade-charm hook is reasonable
# to expect the cluster is running.
# Wait until the leader has set the
try:
update_bootstrap_uuid()
except LeaderNoBootstrapUUIDError:
status_set('waiting', "Waiting for bootstrap-uuid set by leader")
config_changed()
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 render_config_restart_on_changed(hosts, bootstrap=False):
"""Render mysql config and restart mysql service if file changes as a
result.
If bootstrap is True we do a bootstrap-pxc in order to bootstrap the
percona cluster. This should only be performed once at cluster creation
time.
If percona is already bootstrapped we can get away with just ensuring that
it is started so long as the new node to be added is guaranteed to have
been restarted so as to apply the new config.
"""
config_file = resolve_cnf_file()
pre_hash = file_hash(config_file)
render_config(hosts)
create_binlogs_directory()
update_db_rels = False
if file_hash(config_file) != pre_hash or bootstrap:
if bootstrap:
bootstrap_pxc()
# NOTE(dosaboy): this will not actually do anything if no cluster
# relation id exists yet.
notify_bootstrapped()
update_db_rels = True
else:
# NOTE(jamespage):
# if mysql@bootstrap is running, then the native
# bootstrap systemd service was used to start this
# instance, and it was the initial seed unit
# stop the bootstap version before restarting normal mysqld
if service_running('mysql@bootstrap'):
service_stop('mysql@bootstrap')
attempts = 0
max_retries = 5
cluster_wait()
while not service_restart('mysql'):
if attempts == max_retries:
raise Exception("Failed to start mysql (max retries "
"reached)")
log("Failed to start mysql - retrying per distributed wait",
WARNING)
attempts += 1
cluster_wait()
# If we get here we assume prior actions have succeeded to always
# this unit is marked as seeded so that subsequent calls don't result
# in a restart.
mark_seeded()
if update_db_rels:
update_client_db_relations()
else:
log("Config file '{}' unchanged".format(config_file), level=DEBUG)
def render_config_restart_on_changed(clustered, hosts, bootstrap=False):
"""Render mysql config and restart mysql service if file changes as a
result.
If bootstrap is True we do a bootstrap-pxc in order to bootstrap the
percona cluster. This should only be performed once at cluster creation
time.
If percona is already bootstrapped we can get away with just ensuring that
it is started so long as the new node to be added is guaranteed to have
been restarted so as to apply the new config.
"""
config_file = resolve_cnf_file()
pre_hash = file_hash(config_file)
render_config(clustered, hosts)
create_binlogs_directory()
update_db_rels = False
if file_hash(config_file) != pre_hash or bootstrap:
if bootstrap:
bootstrap_pxc()
# NOTE(dosaboy): this will not actually do anything if no cluster
# relation id exists yet.
notify_bootstrapped()
update_db_rels = True
else:
delay = 1
attempts = 0
max_retries = 5
# NOTE(dosaboy): avoid unnecessary restarts. Once mysql is started
# it needn't be restarted when new units join the cluster since the
# new units will join and apply their own config.
if not seeded():
action = service_restart
else:
action = service_start
while not action('mysql'):
if attempts == max_retries:
raise Exception("Failed to start mysql (max retries "
"reached)")
log("Failed to start mysql - retrying in %ss" % (delay),
WARNING)
time.sleep(delay)
delay += 2
attempts += 1
# If we get here we assume prior actions have succeeded to always
# this unit is marked as seeded so that subsequent calls don't result
# in a restart.
mark_seeded()
if update_db_rels:
update_shared_db_rels()
else:
log("Config file '{}' unchanged".format(config_file), level=DEBUG)
def render_config_restart_on_changed(hosts, bootstrap=False):
"""Render mysql config and restart mysql service if file changes as a
result.
If bootstrap is True we do a bootstrap-pxc in order to bootstrap the
percona cluster. This should only be performed once at cluster creation
time.
If percona is already bootstrapped we can get away with just ensuring that
it is started so long as the new node to be added is guaranteed to have
been restarted so as to apply the new config.
"""
config_file = resolve_cnf_file()
pre_hash = file_hash(config_file)
render_config(hosts)
create_binlogs_directory()
update_db_rels = False
if file_hash(config_file) != pre_hash or bootstrap:
if bootstrap:
bootstrap_pxc()
# NOTE(dosaboy): this will not actually do anything if no cluster
# relation id exists yet.
notify_bootstrapped()
update_db_rels = True
else:
# NOTE(jamespage):
# if mysql@bootstrap is running, then the native
# bootstrap systemd service was used to start this
# instance, and it was the initial seed unit
# stop the bootstap version before restarting normal mysqld
if service_running('mysql@bootstrap'):
service_stop('mysql@bootstrap')
attempts = 0
max_retries = 5
cluster_wait()
while not service_restart('mysql'):
if attempts == max_retries:
raise Exception("Failed to start mysql (max retries "
"reached)")
log("Failed to start mysql - retrying per distributed wait",
WARNING)
attempts += 1
cluster_wait()
# If we get here we assume prior actions have succeeded to always
# this unit is marked as seeded so that subsequent calls don't result
# in a restart.
mark_seeded()
if update_db_rels:
update_client_db_relations()
else:
log("Config file '{}' unchanged".format(config_file), level=DEBUG)
def render_config_restart_on_changed(clustered, hosts, bootstrap=False):
"""Render mysql config and restart mysql service if file changes as a
result.
If bootstrap is True we do a bootstrap-pxc in order to bootstrap the
percona cluster. This should only be performed once at cluster creation
time.
If percona is already bootstrapped we can get away with just ensuring that
it is started so long as the new node to be added is guaranteed to have
been restarted so as to apply the new config.
"""
pre_hash = file_hash(resolve_cnf_file())
render_config(clustered, hosts)
create_binlogs_directory()
update_db_rels = False
if file_hash(resolve_cnf_file()) != pre_hash or bootstrap:
if bootstrap:
service('stop', 'mysql')
service('bootstrap-pxc', 'mysql')
# NOTE(dosaboy): this will not actually do anything if no cluster
# relation id exists yet.
notify_bootstrapped()
update_db_rels = True
else:
delay = 1
attempts = 0
max_retries = 5
# NOTE(dosaboy): avoid unnecessary restarts. Once mysql is started
# it needn't be restarted when new units join the cluster since the
# new units will join and apply their own config.
if not seeded():
action = service_restart
else:
action = service_start
while not action('mysql'):
if attempts == max_retries:
raise Exception("Failed to start mysql (max retries "
"reached)")
log("Failed to start mysql - retrying in %ss" % (delay),
WARNING)
time.sleep(delay)
delay += 2
attempts += 1
# If we get here we assume prior actions have succeeded to always
# this unit is marked as seeded so that subsequent calls don't result
# in a restart.
mark_seeded()
if update_db_rels:
update_shared_db_rels()
else:
log("Config file '%s' unchanged", level=DEBUG)
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 upgrade():
if is_leader():
if is_unit_paused_set():
log('Unit is paused, skiping upgrade', level=INFO)
return
# Leader sets on upgrade
leader_set(**{'leader-ip': get_relation_ip('cluster')})
configure_sstuser(sst_password())
if not leader_get('root-password') and leader_get('mysql.passwd'):
leader_set(**{'root-password': leader_get('mysql.passwd')})
# On upgrade-charm we assume the cluster was complete at some point
kvstore = kv()
initial_clustered = kvstore.get(INITIAL_CLUSTERED_KEY, False)
if not initial_clustered:
kvstore.set(key=INITIAL_CLUSTERED_KEY, value=True)
kvstore.flush()
# broadcast the bootstrap-uuid
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)
else:
# Ensure all the peers have the bootstrap-uuid attribute set
# as this is all happening during the upgrade-charm hook is reasonable
# to expect the cluster is running.
# Wait until the leader has set the
try:
update_bootstrap_uuid()
except LeaderNoBootstrapUUIDError:
status_set('waiting', "Waiting for bootstrap-uuid set by leader")
def upgrade():
if is_leader():
if is_unit_paused_set() or is_unit_upgrading_set():
log('Unit is paused, skiping upgrade', level=INFO)
return
# Leader sets on upgrade
leader_set(**{'leader-ip': get_relation_ip('cluster')})
configure_sstuser(sst_password())
if not leader_get('root-password') and leader_get('mysql.passwd'):
leader_set(**{'root-password': leader_get('mysql.passwd')})
# On upgrade-charm we assume the cluster was complete at some point
kvstore = kv()
initial_clustered = kvstore.get(INITIAL_CLUSTERED_KEY, False)
if not initial_clustered:
kvstore.set(key=INITIAL_CLUSTERED_KEY, value=True)
kvstore.flush()
# broadcast the bootstrap-uuid
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)
else:
# Ensure all the peers have the bootstrap-uuid attribute set
# as this is all happening during the upgrade-charm hook is reasonable
# to expect the cluster is running.
# Wait until the leader has set the
try:
update_bootstrap_uuid()
except LeaderNoBootstrapUUIDError:
status_set('waiting', "Waiting for bootstrap-uuid set by leader")