def restart_zookeeper_if_config_changed():
"""Restart Zookeeper if zoo.cfg has changed.
As peers come and go, zoo.cfg will be updated. When that file changes,
restart the Zookeeper service and set an appropriate status message.
"""
# Possibly update bind address
network_interface = hookenv.config().get('network_interface')
if data_changed("zookeeper.bind_address", network_interface):
zk = Zookeeper()
zk.update_bind_address()
zoo_cfg = DistConfig().path('zookeeper_conf') / 'zoo.cfg'
if any_file_changed([zoo_cfg]):
hookenv.status_set('maintenance',
'Server config changed: restarting Zookeeper')
zk = Zookeeper()
zk.stop()
zk.start()
zk_count = int(zk.get_zk_count())
extra_status = ""
if zk_count < 3:
extra_status = ": less than 3 is suboptimal"
elif (zk_count % 2 == 0):
extra_status = ": even number is suboptimal"
hookenv.status_set('active',
'Ready (%d zk units%s)' % (zk_count, extra_status))
else:
# Make sure zookeeper is running in any case
zk = Zookeeper()
zk.start()
zk.open_ports()
def install_zookeeper():
'''
After Bigtop has done the initial setup, trigger a puppet install,
via our Zooekeeper library.
puppet will start the service, as a side effect.
'''
hookenv.status_set('maintenance', 'installing zookeeper')
zookeeper = Zookeeper()
# Prime data changed
data_changed('zkpeer.nodes', zookeeper.read_peers())
data_changed('zk.network_interface',
hookenv.config().get('network_interface'))
zookeeper.install()
zookeeper.open_ports()
set_state('zookeeper.installed')
set_state('zookeeper.started')
hookenv.status_set('active', 'ready {}'.format(zookeeper.quorum_check()))
def install_zookeeper():
'''
After Bigtop has done the initial setup, trigger a puppet install,
via our Zooekeeper library.
puppet will start the service, as a side effect.
'''
hookenv.status_set('maintenance', 'installing zookeeper')
zookeeper = Zookeeper()
# Prime data changed
data_changed('zkpeer.nodes', zookeeper.read_peers())
data_changed(
'zk.network_interface',
hookenv.config().get('network_interface'))
zookeeper.install()
zookeeper.open_ports()
set_state('zookeeper.installed')
set_state('zookeeper.started')
hookenv.status_set('active', 'ready {}'.format(zookeeper.quorum_check()))
def configure():
cfg = hookenv.config()
zookeeper = Zookeeper()
changed = any((
data_changed('zkpeer.nodes', zookeeper.read_peers()),
data_changed('zk.autopurge_purge_interval',
cfg.get('autopurge_purge_interval')),
data_changed('zk.autopurge_snap_retain_count',
cfg.get('autopurge_snap_retain_count')),
data_changed('zk.storage.data_dir',
unitdata.kv().get('zookeeper.storage.data_dir')),
))
if changed or is_flag_set('zookeeper.force-reconfigure'):
zookeeper.install()
zookeeper.open_ports()
clear_flag('zookeeper.force-reconfigure')
set_flag('zookeeper.started')
set_flag('zookeeper.configured')
hookenv.status_set('active', 'ready {}'.format(zookeeper.quorum_check()))
# set app version string for juju status output
zoo_version = get_installed_version(SNAP_NAME) or 'unknown'
hookenv.application_version_set(zoo_version)
def start_zookeeper():
zk = Zookeeper()
zk.start()
zk.open_ports()
set_state('zookeeper.started')
hookenv.status_set('active', 'Ready')
def start_zookeeper():
zk = Zookeeper()
zk.start()
zk.open_ports()
set_state('zookeeper.started')
hookenv.status_set('active', 'Ready')
