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119 Commits 15 Branches 66 Tags
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Commit Graph
74 Commits
Author SHA1 Message Date
Alexander Kukushkin 5a817fad0d Store in etcd endpoint of restapi 
In order to have backward compatibility connection url of restapi is
passed as application_name parameter in connection url of database.
Value in etcd will look like:
postgres://user:passwd@host:5432/postgres?application_name=http://host:8080/governor
Sure, this is a hack, but I guess it worth it.
 2015-05-27 14:46:35 +02:00
Alexander Kukushkin 56a9f52a15 Replace os.system with subprocess.call 2015-05-27 11:16:16 +02:00
Alexander Kukushkin 56daec0d6c Api: Bugfix for current_xlog_location in slaves. 2015-05-26 15:53:57 +02:00
Alexander Kukushkin 8cc0aa90b1 Fix typos when passing connection parameters to psycopg2. 2015-05-26 10:39:16 +02:00
Alexander Kukushkin 518ef68a53 Use connect_timeout=3s and statement_timeout=2s everywhere (even for local connections) 2015-05-26 09:19:20 +02:00
Alexander Kukushkin faf295dcd0 Add initialize key into Cluster 2015-05-24 19:26:35 +02:00
Alexander Kukushkin 1096e04343 Bigfix, cursor.closed contains boolean value 2015-05-24 16:00:31 +02:00
Alexander Kukushkin db34e1f458 Write get_postgresql_status exception into log file 2015-05-24 15:57:10 +02:00
Alexander Kukushkin 8dd99170bf Refactor exceptions handling in etcd.py and ha.py 
update_leader can throw EtcdError exception
unused HealthiestMemberError exception is removed
 2015-05-24 15:40:36 +02:00
Alexander Kukushkin 188741de5a Merge branch 'master' of github.com:CyberDem0n/governor into restapi 2015-05-24 09:02:42 +02:00
Alexander Kukushkin ce267d9f1e query method will retry only in case of communication error 2015-05-24 09:01:23 +02:00
Alexander Kukushkin d202f72a42 Added simple web server which shows current state of postgres 
Server always returns json which contains some status of postgres:
* instance type: master/slave
* xlog location for master
* xlog received_location, replayed_location
This server could be used by haproxy
GET / returns 200 if there is postgres master behind governor.
GET /slave returns 200 is there is postgres slave behind governor
In all other cases it returns 503
Currently server always listening on 0.0.0.0:8080, but it should be
configurable. In the next versions this rest api could also report some
status of etcd and could be used by is_healthiest_node method
 2015-05-23 20:29:51 +02:00
Alexander Kukushkin f53c369c69 Connect timeout 5 seconds for psycopg2 
Refactored query and is_healthiest_node methods
query method wont retry more then 3 times if OperationalError raised
is_healthiest_node takes into account that one of the nodes could be
still a master
 2015-05-23 20:21:13 +02:00
Alexander Kukushkin 34f9b666cf Demote master when etcd is not accessible 2015-05-22 12:26:19 +02:00
Alexander Kukushkin 09163ac454 If there is no connect_address defined in yml file use address from listen as a fallback 2015-05-22 12:03:43 +02:00
Alexander Kukushkin 62d17d68de Use "member_ttl" with default value=3600 for members 2015-05-22 12:00:07 +02:00
Alexander Kukushkin bb884bac00 Move is_unlocked method from Ha into Cluster class 2015-05-22 11:45:09 +02:00
Alexander Kukushkin 4a4d9b85e5 Make sure that there is the new line at the end of pg_hba.con 2015-05-22 11:23:11 +02:00
Alexander Kukushkin 3533b790cb Update list of success return codes for PUT and DELETE 2015-05-20 12:03:12 +02:00
Alexander Kukushkin 0d5bb48ead Close connection when querying other members of cluster 2015-05-19 14:01:30 +02:00
Alexander Kukushkin f7b6c8df40 Merge branch 'master' of github.com:CyberDem0n/governor 
Conflicts:
	helpers/postgresql.py
 2015-05-18 15:58:38 +02:00
Alexander Kukushkin e9ffcf9efe Small refactoring of initdb call 2015-05-18 15:57:24 +02:00
Alexander Kukushkin 520de12232 Remove debug print 2015-05-18 14:39:14 +02:00
Alexander Kukushkin 422512880f last_leader_operation is the propery of Cluster object and the value is set in get_cluster method 2015-05-18 13:43:14 +02:00
Alexander Kukushkin b24fb0488c last_leader_operation is the propery of Cluster object and the value is set in get_cluster method 2015-05-18 13:33:27 +02:00
Alexander Kukushkin d221d1de1c listen_address can have more then one value separated by comma. We will use the first one to connect 2015-05-18 10:53:27 +02:00
Alexander Kukushkin 348100752b Open connection to self via listen address 2015-05-15 16:18:31 +02:00
Alexander Kukushkin af9ebfa3b9 Use connect_address instead of listen when building connection_string 2015-05-15 12:20:24 +02:00
Alexander Kukushkin 75ff91d017 rename connection_address to connect_address 2015-05-15 12:13:05 +02:00
Alexander Kukushkin 08865512f8 Differentiate between connection address and listen address 
For example you can listen on 0.0.0.0 but provide service on some
didicated ip. This should cover all possible use-cases when you are
running behind firewall, load balancer or inside for example docker.
 2015-05-15 12:06:04 +02:00
Alexander Kukushkin 274bc14bfb Do not check maximum_lag_on_failover if it is not defined in config file 2015-05-15 11:38:50 +02:00
Alexander Kukushkin 8e5beb5883 Small optimization 2015-05-15 11:25:26 +02:00
Alexander Kukushkin 9487aec842 Bugfix: get_client_path might get into infinite loop when response code is not 200 2015-05-15 11:23:02 +02:00
Alexander Kukushkin e6e19359df Bugfix, write state_handler.name into leader key 2015-05-13 18:04:27 +02:00
Alexander Kukushkin 0c040b8ce2 Merge branch 'master' of github.com:compose/governor 
Conflicts:
	governor.py
	helpers/etcd.py
	helpers/ha.py
	helpers/postgresql.py
 2015-05-13 18:01:01 +02:00
Alexander Kukushkin 40a4192504 Remove member and leader (is I was the master) keys from etcd on stop of governor 2015-05-13 17:12:17 +02:00
Alexander Kukushkin d25ad17c32 Add support of python3 2015-05-13 14:53:23 +02:00
Christopher Winslett 2c69074652 move stale protection from is_healthy to is_healthiest to allow stale secondaries to rejoin cluster 2015-05-12 18:29:54 -07:00
Christopher Winslett 557bad37cd ensure a stale Postgres does not become leader 2015-05-12 18:11:12 -07:00
Christopher Winslett a1bc07db33 use TTLs with member listing to keep a current list of cluster members 2015-05-12 16:33:32 -07:00
Alexander Kukushkin 281b0b8455 Bugfix in has_lock: sometimes leader can be undefined 2015-05-12 11:07:52 +02:00
Alexander Kukushkin 9dcbc75fd2 Bugfix. It wasn't possible to start the old cluster if all its members were shutdown. 
Basically this is rollback to the original decision tree with the small exception:
1 - If leader is defined and it's not me - then slave would be started immidiately
with the correct recovery conf.
2 - If leader is defined in and it's my host, then it will start instance in
readonly (but without primary_conninfo in recovery.conf)
3 - And the third case - if the leader is not defined - it also will start
instance in readonly, without primary_conninfo.
After performing 2 or 3 it will perform usual decision tree.
 2015-05-12 10:19:45 +02:00
Alexander Kukushkin be7677a1b8 Bugfix, hostname and address are not keys of dict but properties of Member object 2015-05-12 09:08:45 +02:00
Alexander Kukushkin e2faf641d5 Start slave with the correct recovery.conf on governor start 
Also governor is able to pick up already running master and slave
instances without restarting them.
In case is you have a lock and postgres is not running behaviour remains
the same: it will start master in read only mode and then promote if it
still has the lock.
 2015-05-11 16:50:21 +02:00
Alexander Kukushkin eb1721f65f Minimize amount of requests to etcd 2015-05-11 15:15:08 +02:00
Alexander Kukushkin 6d17d39776 Backport from compose/governor: compare xlog positions based on bytes since 0/000000 based on feedback 2015-05-11 10:06:18 +02:00
Alexander Kukushkin 2e3eb333cb Shutdown fast 2015-05-11 09:48:59 +02:00
Alexander Kukushkin 0b288a7f3e Track list of already existing physical replication slots 
Drop replication slot when it was removed from etcd.
Execute pg_create_physical_replication_slot only when something new appeared in etcd.
 2015-05-11 09:48:15 +02:00
Alexander Kukushkin 8cfbdcfcd4 Track list of already existing physical replication slots 
Drop replication slot when it was removed from etcd.
Execute pg_create_physical_replication_slot only when something new appeared in etcd.
 2015-05-11 09:44:57 +02:00
Alexander Kukushkin 588c951a86 Return True after success call of update_leader and check return code 2015-05-11 08:48:51 +02:00