def __init__(self, config):
self.nap_time = config['loop_wait']
self.postgresql = Postgresql(config['postgresql'])
self.ha = Ha(self.postgresql, self.get_dcs(self.postgresql.name, config))
host, port = config['restapi']['listen'].split(':')
self.api = RestApiServer(self, config['restapi'])
self.skydns2 = config.get('skydns2')
self.next_run = time.time()
self.shutdown_member_ttl = 300
def set_up(self):
self.p = MockPostgresql()
with patch.object(Client, 'machines') as mock_machines:
mock_machines.__get__ = Mock(
return_value=['http://remotehost:2379'])
self.e = Etcd('foo', {
'ttl': 30,
'host': 'remotehost:2379',
'scope': 'test'
})
self.e.client.read = etcd_read
self.e.client.write = etcd_write
self.ha = Ha(self.p, self.e)
self.ha.load_cluster_from_dcs()
self.ha.cluster = get_unlocked_cluster()
self.ha.load_cluster_from_dcs = nop
def set_up(self):
requests.get = requests_get
requests.put = requests_put
requests.delete = requests_delete
self.p = MockPostgresql()
self.e = Etcd({'ttl': 30, 'host': 'remotehost', 'scope': 'test'})
self.ha = Ha(self.p, self.e)
self.ha.cluster = Cluster(None, None, [])
self.ha.load_cluster_from_etcd = nop
def __init__(self, config):
assert config["etcd"]["ttl"] > 2 * config["loop_wait"]
self.nap_time = config['loop_wait']
self.etcd = Etcd(config['etcd'])
self.aws = AWSConnection(config)
self.postgresql = Postgresql(config['postgresql'], self.aws.on_role_change)
self.ha = Ha(self.postgresql, self.etcd)
host, port = config['restapi']['listen'].split(':')
self.api = RestApiServer(self, config['restapi'])
self.next_run = time.time()
def run(config):
etcd = Etcd(config["etcd"])
postgresql = Postgresql(config["postgresql"])
ha = Ha(postgresql, etcd)
atexit.register(stop_postgresql, postgresql)
logging.info("Governor Starting up")
# is data directory empty?
if postgresql.data_directory_empty():
logging.info("Governor Starting up: Empty Data Dir")
# racing to initialize
wait_for_etcd("cannot initialize member without ETCD", etcd,
postgresql)
if etcd.race("/initialize", postgresql.name) or not etcd.members():
logging.info(
"Governor Starting up: Initialisation Race ... WON!!!")
logging.info("Governor Starting up: Initialise Postgres")
postgresql.initialize()
logging.info("Governor Starting up: Initialise Complete")
etcd.take_leader(postgresql.name)
logging.info("Governor Starting up: Starting Postgres")
postgresql.start()
else:
logging.info("Governor Starting up: Initialisation Race ... LOST")
logging.info("Governor Starting up: Sync Postgres from Leader")
synced_from_leader = False
while not synced_from_leader:
leader = etcd.current_leader()
if not leader:
time.sleep(5)
continue
if postgresql.sync_from_leader(leader):
logging.info("Governor Starting up: Sync Completed")
postgresql.write_recovery_conf(leader)
logging.info("Governor Starting up: Starting Postgres")
postgresql.start()
synced_from_leader = True
else:
time.sleep(5)
else:
logging.info("Governor Starting up: Existing Data Dir")
postgresql.follow_no_leader()
logging.info("Governor Starting up: Starting Postgres")
postgresql.start()
wait_for_etcd(
"running in readonly mode; cannot participate in cluster HA without etcd",
etcd, postgresql)
logging.info("Governor Running: Starting Running Loop")
while True:
try:
ha.run_cycle()
# create replication slots
if postgresql.is_leader():
logging.info("Governor Running: I am the Leader")
for node in etcd.get_client_path(
"/members?recursive=true").get("node",
{}).get("nodes", []):
member = node["key"].split('/')[-1]
if member != postgresql.name:
postgresql.query(
"DO LANGUAGE plpgsql $$DECLARE somevar VARCHAR; BEGIN SELECT slot_name INTO somevar FROM pg_replication_slots WHERE slot_name = '%(slot)s' LIMIT 1; IF NOT FOUND THEN PERFORM pg_create_physical_replication_slot('%(slot)s'); END IF; END$$;"
% {"slot": member})
etcd.touch_member(postgresql.name, postgresql.connection_string)
time.sleep(config["loop_wait"])
except urllib2.URLError:
logging.info(
"Lost connection to etcd, setting no leader and waiting on etcd"
)
postgresql.follow_no_leader()
wait_for_etcd(
"running in readonly mode; cannot participate in cluster HA without etcd",
etcd, postgresql)
def run(config):
etcd = Etcd(config["etcd"])
postgresql = Postgresql(config["postgresql"])
ha = Ha(postgresql, etcd)
atexit.register(stop_postgresql, postgresql)
logging.info("Governor Starting up")
# is data directory empty?
if postgresql.data_directory_empty():
logging.info("Governor Starting up: Empty Data Dir")
# racing to initialize
wait_for_etcd("cannot initialize member without ETCD", etcd, postgresql)
if etcd.race("/initialize", postgresql.name):
logging.info("Governor Starting up: Initialisation Race ... WON!!!")
logging.info("Governor Starting up: Initialise Postgres")
postgresql.initialize()
logging.info("Governor Starting up: Initialise Complete")
etcd.take_leader(postgresql.name)
logging.info("Governor Starting up: Starting Postgres")
postgresql.start()
else:
logging.info("Governor Starting up: Initialisation Race ... LOST")
logging.info("Governor Starting up: Sync Postgres from Leader")
synced_from_leader = False
while not synced_from_leader:
leader = etcd.current_leader()
if not leader:
time.sleep(5)
continue
if postgresql.sync_from_leader(leader):
logging.info("Governor Starting up: Sync Completed")
postgresql.write_recovery_conf(leader)
logging.info("Governor Starting up: Starting Postgres")
postgresql.start()
synced_from_leader = True
else:
time.sleep(5)
else:
logging.info("Governor Starting up: Existing Data Dir")
postgresql.follow_no_leader()
logging.info("Governor Starting up: Starting Postgres")
postgresql.start()
wait_for_etcd("running in readonly mode; cannot participate in cluster HA without etcd", etcd, postgresql)
logging.info("Governor Running: Starting Running Loop")
while True:
try:
logging.info("Governor Running: %s" % ha.run_cycle())
# create replication slots
if postgresql.is_leader():
logging.info("Governor Running: I am the Leader")
for node in etcd.get_client_path("/members?recursive=true")["node"]["nodes"]:
member = node["key"].split('/')[-1]
if member != postgresql.name:
postgresql.query("DO LANGUAGE plpgsql $$DECLARE somevar VARCHAR; BEGIN SELECT slot_name INTO somevar FROM pg_replication_slots WHERE slot_name = '%(slot)s' LIMIT 1; IF NOT FOUND THEN PERFORM pg_create_physical_replication_slot('%(slot)s'); END IF; END$$;" % {"slot": member})
etcd.touch_member(postgresql.name, postgresql.connection_string)
time.sleep(config["loop_wait"])
except urllib2.URLError:
logging.info("Lost connection to etcd, setting no leader and waiting on etcd")
postgresql.follow_no_leader()
wait_for_etcd("running in readonly mode; cannot participate in cluster HA without etcd", etcd, postgresql)
if os.getenv('GOVERNOR_POSTGRESQL_READ_ONLY_PORT'):
config['postgresql']['read_only_port'] = os.getenv(
'GOVERNOR_POSTGRESQL_READ_ONLY_PORT')
if os.getenv('GOVERNOR_POSTGRESQL_DATA_DIR'):
config['postgresql']['data_dir'] = os.getenv(
'GOVERNOR_POSTGRESQL_DATA_DIR')
if os.getenv('GOVERNOR_POSTGRESQL_REPLICATION_NETWORK'):
config['postgresql']['replication']['network'] = os.getenv(
'GOVERNOR_POSTGRESQL_REPLICATION_NETWORK')
etcd = Etcd(config["etcd"])
postgresql = Postgresql(config["postgresql"])
ha = Ha(postgresql, etcd)
# leave things clean when shutting down, if possible
def shutdown(signal, frame):
logging.info("Governor Shutting Down: Received Shutdown Signal")
try:
if ha.has_lock():
logging.info("Governor Shutting Down: Abdicating Leadership")
etcd.abdicate(postgresql.name)
logging.info("Governor Shutting Down: Removing Membership")
etcd.delete_member(postgresql.name)
except:
logging.exception("Error during Abdication")
pass
#!/usr/bin/env python
import sys, os, yaml, time, urllib2, atexit
from helpers.etcd import Etcd
from helpers.postgresql import Postgresql
from helpers.ha import Ha
f = open(sys.argv[1], "r")
config = yaml.load(f.read())
f.close()
etcd = Etcd(config["etcd"])
postgresql = Postgresql(config["postgresql"])
ha = Ha(postgresql, etcd)
# stop postgresql on script exit
def stop_postgresql():
postgresql.stop()
atexit.register(stop_postgresql)
# wait for etcd to be available
etcd_ready = False
while not etcd_ready:
try:
etcd.touch_member(postgresql.name, postgresql.connection_string)
etcd_ready = True
except urllib2.URLError:
print "waiting on etcd"
time.sleep(5)
# is data directory empty?
class Patroni:
def __init__(self, config):
self.nap_time = config['loop_wait']
self.postgresql = Postgresql(config['postgresql'])
self.ha = Ha(self.postgresql, self.get_dcs(self.postgresql.name, config))
host, port = config['restapi']['listen'].split(':')
self.api = RestApiServer(self, config['restapi'])
self.skydns2 = config.get('skydns2')
self.next_run = time.time()
self.shutdown_member_ttl = 300
@staticmethod
def get_dcs(name, config):
if 'etcd' in config:
assert config['etcd']['ttl'] > 2 * config['loop_wait']
return Etcd(name, config['etcd'])
if 'zookeeper' in config:
return ZooKeeper(name, config['zookeeper'])
raise Exception('Can not find sutable configuration of distributed configuration store')
def touch_member(self, ttl=None):
connection_string = self.postgresql.connection_string + '?application_name=' + self.api.connection_string
if self.ha.cluster:
for m in self.ha.cluster.members:
# Do not update member TTL when it is far from being expired
if m.name == self.postgresql.name and m.real_ttl() > self.shutdown_member_ttl:
return True
return self.ha.dcs.touch_member(connection_string, ttl)
def initialize(self):
# wait for etcd to be available
while not self.touch_member():
logger.info('waiting on DCS')
sleep(5)
# is data directory empty?
if self.postgresql.data_directory_empty():
# racing to initialize
if self.ha.dcs.race('/initialize'):
self.postgresql.initialize()
self.ha.dcs.take_leader()
self.postgresql.start()
else:
while True:
leader = self.ha.dcs.current_leader()
if leader and self.postgresql.sync_from_leader(leader):
self.postgresql.write_recovery_conf(leader)
self.postgresql.start()
break
sleep(5)
elif self.postgresql.is_running():
self.postgresql.load_replication_slots()
def schedule_next_run(self):
self.next_run += self.nap_time
current_time = time.time()
nap_time = self.next_run - current_time
if nap_time <= 0:
self.next_run = current_time
else:
self.ha.dcs.sleep(nap_time)
def run(self):
self.api.start()
self.next_run = time.time()
while True:
self.touch_member()
logger.info(self.ha.run_cycle())
try:
if self.ha.state_handler.is_leader():
self.ha.cluster and self.ha.state_handler.create_replication_slots(self.ha.cluster)
# SkyDNS2 support: publish leader
if self.skydns2:
self.ha.dcs.client.set(self.skydns2['publish_leader'],
'{{"host": "{0}", "port": {1}}}'.format(*self.postgresql.connect_address), ttl=self.skydns2['ttl'])
else:
self.ha.state_handler.drop_replication_slots()
except:
logger.exception('Exception when changing replication slots')
reap_children()
self.schedule_next_run()
class Governor:
def __init__(self, config):
assert config["etcd"]["ttl"] > 2 * config["loop_wait"]
self.nap_time = config['loop_wait']
self.etcd = Etcd(config['etcd'])
self.aws = AWSConnection(config)
self.postgresql = Postgresql(config['postgresql'], self.aws.on_role_change)
self.ha = Ha(self.postgresql, self.etcd)
host, port = config['restapi']['listen'].split(':')
self.api = RestApiServer(self, config['restapi'])
self.next_run = time.time()
def touch_member(self, ttl=None):
connection_string = self.postgresql.connection_string + '?application_name=' + self.api.connection_string
return self.etcd.touch_member(self.postgresql.name, connection_string, ttl)
def initialize(self):
# FIXME: isn't there a better way testing if etcd is writable?
# wait for etcd to be available
while not self.touch_member():
logging.info('waiting on etcd')
sleep(5)
# is data directory empty?
if self.postgresql.data_directory_empty():
# racing to initialize
if self.etcd.race('/initialize', self.postgresql.name):
self.postgresql.initialize()
self.etcd.take_leader(self.postgresql.name)
self.postgresql.start()
else:
# FIXME: touch_member?
while True:
leader = self.etcd.current_leader()
if leader and self.postgresql.sync_from_leader(leader):
self.postgresql.write_recovery_conf(leader)
self.postgresql.start()
break
sleep(5)
elif self.postgresql.is_running():
self.postgresql.load_replication_slots()
def schedule_next_run(self):
self.next_run += self.nap_time
current_time = time.time()
nap_time = self.next_run - current_time
if nap_time <= 0:
self.next_run = current_time
else:
sleep(nap_time)
def run(self):
self.api.start()
self.next_run = time.time()
while True:
self.touch_member()
logging.info(self.ha.run_cycle())
self.schedule_next_run()
def run(config):
etcd = Etcd(config["etcd"])
postgresql = Postgresql(config["postgresql"])
ha = Ha(postgresql, etcd)
atexit.register(stop_postgresql, postgresql)
signal.signal(signal.SIGTERM, signalhandler)
logging.info("Governor Starting up")
# is data directory empty?
if postgresql.data_directory_empty():
logging.info("Governor Starting up: Empty Data Dir")
# racing to initialize
wait_for_etcd("cannot initialize member without ETCD", etcd, postgresql)
if etcd.race("/initialize", postgresql.name):
logging.info("Governor Starting up: Initialisation Race ... WON!!!")
logging.info("Governor Starting up: Initialise Postgres")
postgresql.initialize()
logging.info("Governor Starting up: Initialise Complete")
etcd.take_leader(postgresql.name)
logging.info("Governor Starting up: Starting Postgres")
postgresql.start()
else:
logging.info("Governor Starting up: Initialisation Race ... LOST")
logging.info("Governor Starting up: Sync Postgres from Leader")
synced_from_leader = False
while not synced_from_leader:
leader = etcd.current_leader()
if not leader:
time.sleep(5)
continue
if postgresql.sync_from_leader(leader):
logging.info("Governor Starting up: Sync Completed")
postgresql.write_recovery_conf(leader)
logging.info("Governor Starting up: Starting Postgres")
postgresql.start()
synced_from_leader = True
else:
time.sleep(5)
else:
logging.info("Governor Starting up: Existing Data Dir")
postgresql.follow_no_leader()
logging.info("Governor Starting up: Starting Postgres")
postgresql.start()
wait_for_etcd("running in readonly mode; cannot participate in cluster HA without etcd", etcd, postgresql)
logging.info("Governor Running: Starting Running Loop")
while True:
try:
logging.info("Governor Running: %s" % ha.run_cycle())
# create replication slots
if postgresql.is_leader():
logging.info("Governor Running: I am the Leader")
for node in etcd.members():
member = node["hostname"]
if member != postgresql.name:
if postgresql.is_leader():
postgresql.ensure_replication_slot(
postgresql.replication_slot_name(member)
)
else:
postgresql.drop_replication_slot(
postgresql.replication_slot_name(member)
)
etcd.touch_member(postgresql.name, postgresql.connection_string)
time.sleep(config["loop_wait"])
except (urllib2.URLError, socket.timeout):
logging.info("Lost connection to etcd, setting no leader and waiting on etcd")
postgresql.follow_no_leader()
wait_for_etcd("running in readonly mode; cannot participate in cluster HA without etcd", etcd, postgresql)
class TestHa(unittest.TestCase):
def __init__(self, method_name='runTest'):
self.setUp = self.set_up
super(TestHa, self).__init__(method_name)
def set_up(self):
requests.get = requests_get
requests.put = requests_put
requests.delete = requests_delete
self.p = MockPostgresql()
self.e = Etcd({'ttl': 30, 'host': 'remotehost', 'scope': 'test'})
self.ha = Ha(self.p, self.e)
self.ha.cluster = Cluster(None, None, [])
self.ha.load_cluster_from_etcd = nop
def test_start_as_slave(self):
self.p.is_healthy = false
self.assertEquals(self.ha.run_cycle(), 'started as a secondary')
def test_start_as_readonly(self):
self.ha.cluster.is_unlocked = false
self.p.is_leader = self.p.is_healthy = false
self.ha.has_lock = true
self.assertEquals(self.ha.run_cycle(), 'promoted self to leader because i had the session lock')
def test_acquire_lock_as_master(self):
self.assertEquals(self.ha.run_cycle(), 'acquired session lock as a leader')
def test_promoted_by_acquiring_lock(self):
self.p.is_leader = false
self.assertEquals(self.ha.run_cycle(), 'promoted self to leader by acquiring session lock')
def test_demote_after_failing_to_obtain_lock(self):
self.ha.acquire_lock = false
self.assertEquals(self.ha.run_cycle(), 'demoted self due after trying and failing to obtain lock')
def test_follow_new_leader_after_failing_to_obtain_lock(self):
self.ha.acquire_lock = false
self.p.is_leader = false
self.assertEquals(self.ha.run_cycle(), 'following new leader after trying and failing to obtain lock')
def test_demote_because_not_healthiest(self):
self.p.is_healthiest_node = false
self.assertEquals(self.ha.run_cycle(), 'demoting self because i am not the healthiest node')
def test_follow_new_leader_because_not_healthiest(self):
self.p.is_healthiest_node = false
self.p.is_leader = false
self.assertEquals(self.ha.run_cycle(), 'following a different leader because i am not the healthiest node')
def test_promote_because_have_lock(self):
self.ha.cluster.is_unlocked = false
self.ha.has_lock = true
self.p.is_leader = false
self.assertEquals(self.ha.run_cycle(), 'promoted self to leader because i had the session lock')
def test_leader_with_lock(self):
self.ha.cluster.is_unlocked = false
self.ha.has_lock = true
self.assertEquals(self.ha.run_cycle(), 'no action. i am the leader with the lock')
def test_demote_because_not_having_lock(self):
self.ha.cluster.is_unlocked = false
self.assertEquals(self.ha.run_cycle(), 'demoting self because i do not have the lock and i was a leader')
def test_follow_the_leader(self):
self.ha.cluster.is_unlocked = false
self.p.is_leader = false
self.assertEquals(self.ha.run_cycle(), 'no action. i am a secondary and i am following a leader')
def test_no_etcd_connection_master_demote(self):
self.ha.load_cluster_from_etcd = dead_etcd
self.assertEquals(self.ha.run_cycle(), 'demoted self because etcd is not accessible and i was a leader')
def test_load_cluster_from_dcs(self):
ha = Ha(self.p, self.e)
ha.load_cluster_from_dcs()
self.e.get_cluster = get_unlocked_cluster
ha.load_cluster_from_dcs()
class TestHa(unittest.TestCase):
def __init__(self, method_name='runTest'):
self.setUp = self.set_up
super(TestHa, self).__init__(method_name)
def set_up(self):
self.p = MockPostgresql()
with patch.object(Client, 'machines') as mock_machines:
mock_machines.__get__ = Mock(
return_value=['http://remotehost:2379'])
self.e = Etcd('foo', {
'ttl': 30,
'host': 'remotehost:2379',
'scope': 'test'
})
self.e.client.read = etcd_read
self.e.client.write = etcd_write
self.ha = Ha(self.p, self.e)
self.ha.load_cluster_from_dcs()
self.ha.cluster = get_unlocked_cluster()
self.ha.load_cluster_from_dcs = nop
def test_load_cluster_from_dcs(self):
ha = Ha(self.p, self.e)
ha.load_cluster_from_dcs()
self.e.get_cluster = get_unlocked_cluster
ha.load_cluster_from_dcs()
def test_start_as_slave(self):
self.p.is_healthy = false
self.assertEquals(self.ha.run_cycle(), 'started as a secondary')
def test_start_as_readonly(self):
self.ha.cluster.is_unlocked = false
self.p.is_leader = self.p.is_healthy = false
self.ha.has_lock = true
self.assertEquals(
self.ha.run_cycle(),
'promoted self to leader because i had the session lock')
def test_acquire_lock_as_master(self):
self.assertEquals(self.ha.run_cycle(),
'acquired session lock as a leader')
def test_promoted_by_acquiring_lock(self):
self.p.is_leader = false
self.assertEquals(self.ha.run_cycle(),
'promoted self to leader by acquiring session lock')
def test_demote_after_failing_to_obtain_lock(self):
self.ha.acquire_lock = false
self.assertEquals(
self.ha.run_cycle(),
'demoted self due after trying and failing to obtain lock')
def test_follow_new_leader_after_failing_to_obtain_lock(self):
self.ha.acquire_lock = false
self.p.is_leader = false
self.assertEquals(
self.ha.run_cycle(),
'following new leader after trying and failing to obtain lock')
def test_demote_because_not_healthiest(self):
self.p.is_healthiest_node = false
self.assertEquals(
self.ha.run_cycle(),
'demoting self because i am not the healthiest node')
def test_follow_new_leader_because_not_healthiest(self):
self.p.is_healthiest_node = false
self.p.is_leader = false
self.assertEquals(
self.ha.run_cycle(),
'following a different leader because i am not the healthiest node'
)
def test_promote_because_have_lock(self):
self.ha.cluster.is_unlocked = false
self.ha.has_lock = true
self.p.is_leader = false
self.assertEquals(
self.ha.run_cycle(),
'promoted self to leader because i had the session lock')
def test_leader_with_lock(self):
self.ha.cluster.is_unlocked = false
self.ha.has_lock = true
self.assertEquals(self.ha.run_cycle(),
'no action. i am the leader with the lock')
def test_demote_because_not_having_lock(self):
self.ha.cluster.is_unlocked = false
self.assertEquals(
self.ha.run_cycle(),
'demoting self because i do not have the lock and i was a leader')
def test_follow_the_leader(self):
self.ha.cluster.is_unlocked = false
self.p.is_leader = false
self.assertEquals(
self.ha.run_cycle(),
'no action. i am a secondary and i am following a leader')
def test_no_etcd_connection_master_demote(self):
self.ha.load_cluster_from_dcs = dead_etcd
self.assertEquals(
self.ha.run_cycle(),
'demoted self because DCS is not accessible and i was a leader')
import logging
from helpers.etcd import Etcd
from helpers.postgresql import Postgresql
from helpers.ha import Ha
logging.basicConfig(format='%(asctime)s %(levelname)s: %(message)s', level=logging.INFO)
f = open(sys.argv[1], "r")
config = yaml.load(f.read())
f.close()
etcd = Etcd(config["etcd"])
postgresql = Postgresql(config["postgresql"])
ha = Ha(postgresql, etcd)
# wait for etcd to be available
etcd_ready = False
while not etcd_ready:
try:
etcd.touch_member(postgresql.name, postgresql.connection_string)
etcd_ready = True
except urllib2.URLError:
logging.info("waiting on etcd")
time.sleep(5)
# is data directory empty?
if postgresql.data_directory_empty():
# racing to initialize
if etcd.race("/initialize", postgresql.name):
f.close()
# kms is needed to decryot config
kms = Kms(config["kms"])
# configure the postgres
hostname = gethostname()
config["postgresql"]["name"] = hostname.split('.')[0]
config["postgresql"]["listen"] = our_ip + ":" + str(config["postgresql"]["port"])
postgresql = Postgresql(config["postgresql"], kms, hostname)
config["rt53"]["our_ip"] = our_ip
rt53 = Rt53(config["rt53"])
etcd = Etcd(config["etcd"])
sns = Sns(config["sns"], kms)
sqs = Sqs(config["sqs"])
ha = Ha(postgresql, etcd, rt53, sns, sqs, hostname)
# stop postgresql on script exit
def stop_postgresql():
postgresql.stop()
atexit.register(stop_postgresql)
# wait for etcd to be available
etcd_ready = False
while not etcd_ready:
try:
etcd.touch_member(postgresql.name, postgresql.connection_string)
etcd_ready = True
except urllib2.URLError:
syslog.syslog("waiting on etcd")
time.sleep(5)
from helpers.etcd import Etcd
from helpers.postgresql import Postgresql
from helpers.ha import Ha
LOG_LEVEL = logging.DEBUG if os.getenv('DEBUG', None) else logging.INFO
logging.basicConfig(format='%(asctime)s %(levelname)s: %(message)s', level=LOG_LEVEL)
f = open(sys.argv[1], "r")
config = yaml.load(f.read())
f.close()
etcd = Etcd(config["etcd"])
postgresql = Postgresql(config["postgresql"])
ha = Ha(postgresql, etcd)
# stop postgresql on script exit
def stop_postgresql():
postgresql.stop()
atexit.register(stop_postgresql)
# wait for etcd to be available
def wait_for_etcd(message):
etcd_ready = False
while not etcd_ready:
try:
etcd.touch_member(postgresql.name, postgresql.connection_string)
etcd_ready = True
except urllib2.URLError:
logging.info("waiting on etcd: %s" % message)
import logging
from helpers.etcd import Etcd
from helpers.postgresql import Postgresql
from helpers.ha import Ha
logging.basicConfig(format='%(asctime)s %(levelname)s: %(message)s',
level=logging.INFO)
f = open(sys.argv[1], "r")
config = yaml.load(f.read())
f.close()
etcd = Etcd(config["etcd"])
postgresql = Postgresql(config["postgresql"])
ha = Ha(postgresql, etcd)
# stop postgresql on script exit
def stop_postgresql():
postgresql.stop()
atexit.register(stop_postgresql)
# wait for etcd to be available
etcd_ready = False
while not etcd_ready:
try:
etcd.touch_member(postgresql.name, postgresql.connection_string)
etcd_ready = True