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v0.1
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31 Commits
Author SHA1 Message Date
Alexander Kukushkin b54119b918 Run is_healthiest_node against last know healthy configuration of cluster 
This will help to survive when everything was wiped from configuration
store.
 2015-07-15 11:20:25 +02:00
Alexander Kukushkin 7445590546 Keep node name in AbstractDCS class 
It eliminates need to pass this name into most of the methods
 2015-07-07 12:26:52 +02:00
Alexander Kukushkin ae689a2f83 Rename ha.etcd into ha.dcs 2015-07-02 15:33:21 +02:00
Alexander Kukushkin cc71906009 Inherit Etcd from abstract class 2015-07-02 15:15:07 +02:00
Alexander Kukushkin 9732106e5d BUGFIX: keep list of replication slots on slaves empty 
Otherwise slaves accumulate wal files...
 2015-06-25 14:01:06 +02:00
Alexander Kukushkin b7c73fdba8 Rename hostname to name in a Member 2015-06-23 14:07:00 +02:00
Alexander Kukushkin 261fbf2721 Replace logging with logger in ha.py 2015-06-09 10:27:09 +02:00
Alexander Kukushkin adcc7ac256 Try to avoid "double" promotion. 
Also check presence of trigger_file on master after promotion when
pg_is_in_recovery() = false and if it is there - remove it.
Plus check presence of trigger_file on a new slave (after running
pg_basebackup) and if it is there - also remove it.
 2015-06-01 13:48:44 +02:00
Alexander Kukushkin b85262637d Bugfix: do not create replication slot for master 2015-06-01 09:20:24 +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 ce267d9f1e query method will retry only in case of communication error 2015-05-24 09:01:23 +02:00
Alexander Kukushkin 34f9b666cf Demote master when etcd is not accessible 2015-05-22 12:26:19 +02:00
Alexander Kukushkin bb884bac00 Move is_unlocked method from Ha into Cluster class 2015-05-22 11:45:09 +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 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 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
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 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 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
Alexander Kukushkin 72010f68cc Bugfix: two calls has_lock and update_lock are not atomic 
Having a lock a few moments ago, doesn't mean that you will be able to
update it.
 2015-05-08 16:21:09 +02:00
Alexander Kukushkin c75bb2b297 Format code according to pep8 2015-05-06 14:39:15 +02:00
Christopher Grim b979c12c9d Use timestamped logs 2015-04-03 17:27:47 -04:00
Christopher Winslett d07572e80e add a restarter to the ha loop 2015-03-19 08:46:14 -07:00
Christopher Winslett 0d75152d54 make healthiest node work 2015-03-16 09:47:52 -07:00
Christopher Winslett 450b9912d7 clean up some debugging statements 2015-03-16 08:30:15 -07:00
Christopher Winslett 3749883328 first commit 2015-03-15 23:16:48 -07:00