Commit Graph

12 Commits

Author SHA1 Message Date
Atin Malaviya 5a76929ba4 Fixed clearSessionTimer, created invalidateSession, added invalid TTL test 2014-12-11 05:34:31 -05:00
Atin Malaviya 7ece29c3e0 Took out usage of snapshot SessionListTTL 2014-12-10 21:37:06 -05:00
Atin Malaviya e84b26fcf5 Remove hardcoded wait time in session TTL tests 2014-12-10 21:04:09 -05:00
Atin Malaviya 8369b77204 Clean up code based on feedback from armon 2014-12-10 20:49:06 -05:00
Atin Malaviya c992c18ef0 Added more tests. Also added return of 404 if the session id to renew is not found 2014-12-10 10:02:23 -05:00
Atin Malaviya b623af776b Consul Session TTLs
The design of the session TTLs is based on the Google Chubby approach
(http://research.google.com/archive/chubby-osdi06.pdf). The Session
struct has an additional TTL field now. This attaches an implicit
heartbeat based failure detector. Tracking of heartbeats is done by
the current leader and not persisted via the Raft log. The implication
of this is during a leader failover, we do not retain the last
heartbeat times.

Similar to Chubby, the TTL represents a lower-bound. Consul promises
not to terminate a session before the TTL has expired, but is allowed
to extend the expiration past it. This enables us to reset the TTL on
a leader failover. The TTL is also extended when the client does a
heartbeat. Like Chubby, this means a TTL is extended on creation,
heartbeat or failover.

Additionally, because we must account for time requests are in transit
and the relative rates of clocks on the clients and servers, Consul
will take the conservative approach of internally multiplying the TTL
by 2x. This helps to compensate for network latency and clock skew
without violating the contract.

Reference: https://docs.google.com/document/d/1Y5-pahLkUaA7Kz4SBU_mehKiyt9yaaUGcBTMZR7lToY/edit?usp=sharing
2014-12-07 12:38:22 -05:00
Atin Malaviya 3aabda02b3 Clean up tests, use switch to default session.Behavior value if unspecified, unrecognized 2014-11-20 14:29:18 -05:00
Atin Malaviya aa0cecd04e Ephemeral Nodes for via Session behavior settings.
Added a "delete" behavior for session invalidation, in addition to
the default "release" behavior. On session invalidation, the sessions
Behavior field is checked and if it is set to "delete", all nodes owned
by the session are deleted. If it is "release", then just the locks
are released as default.
2014-11-20 11:34:45 -05:00
Ryan Uber 54d6e256e3 agent: fix tests after default status change 2014-10-15 15:43:53 -07:00
Armon Dadgar 9e925bf458 consul: Adding support for optional session name 2014-06-09 11:42:28 -07:00
Armon Dadgar 60c66ec7b5 agent: Adding support for specifying LockDelay, defaults to 15 seconds. 2014-05-20 16:25:29 -07:00
Armon Dadgar a53cb6e1dd agent: Session endpoint tests 2014-05-20 16:25:29 -07:00