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save/restore both postgresql.conf and pg_hba.conf for WAL-e backup.

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This commit is contained in:
Oleksii Kliukin
2015-05-20 11:47:20 +02:00
parent 42dfaaab3f
commit e02eec91bf
1 changed files with 10 additions and 9 deletions
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helpers/postgresql.py
+10 -9
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@@ -44,7 +44,7 @@ class Postgresql:
self.superuser = config['superuser']
self.admin = config['admin']
self.recovery_conf = os.path.join(self.data_dir, 'recovery.conf')
self.postgresql_conf = os.path.join(self.data_dir, 'postgresql.conf')
self.configuration_to_save = (os.path.join(self.data_dir, 'pg_hba.conf'), os.path.join(self.data_dir, 'postgresql.conf'))
self._pg_ctl = 'pg_ctl -w -D ' + self.data_dir
self._wal_e = 'envdir {} wal-e --aws-instance-profile '.format(os.environ.get('WALE_ENV_DIR', '/home/postgres/etc/wal-e.d/env'))
@@ -125,8 +125,7 @@ class Postgresql:
def create_replica_with_s3(self):
ret = os.system(self._wal_e + ' backup-fetch {} LATEST'.format(self.data_dir))
self.restore_postgresql_conf()
self.write_pg_hba()
self.restore_configuration_files()
return ret
@@ -208,7 +207,7 @@ class Postgresql:
ret = os.system(self._pg_ctl + ' start -o "{}"'.format(self.server_options())) == 0
ret and self.load_replication_slots()
self.save_postgresql_conf()
self.save_configuration_files()
return ret
def stop(self):
@@ -303,19 +302,21 @@ primary_conninfo = '{}'
self.write_recovery_conf(leader)
self.restart()
def save_postgresql_conf(self):
def save_configuration_files(self):
"""
copy postgresql.conf to postgresql.conf.backup to preserve it in the WAL-e backup.
see http://comments.gmane.org/gmane.comp.db.postgresql.wal-e/239
"""
shutil.copy(self.postgresql_conf, self.postgresql_conf+'.backup')
for f in self.configuration_to_save:
shutil.copy(f, f+'.backup')
def restore_postgresql_conf(self):
def restore_configuration_files(self):
""" restore a previously saved postgresql.conf """
try:
shutil.copy(self.postgresql_conf+'.backup', self.postgresql_conf)
for f in self.configuration_to_save:
shutil.copy(f+'.backup', f)
except Exception as e:
logger.error("unable to restore postgresql.conf from WAL-E backup: {}".format(e))
logger.error("unable to restore configuration from WAL-E backup: {}".format(e))
def promote(self):
return os.system(self._pg_ctl + ' promote') == 0