Commit Graph

31 Commits

Author SHA1 Message Date
James Bardin bcb11f6d89 have the consul client manage the lock session
When a consul lock is lost, there is a possibility that the associated
session is still active. Most commonly, the long request to watch the
lock key may error out, while the session is continually refreshed at a
rate of TTL/2.

First have the lock monitor retry the lock internally for at least 10
seconds (5 attempts with the default 2 second wait time). In most cases
this will reconnect on the first try, keeping the lock channel open.

If the consul lock can't recover itself, then cancel the session as soon
as possible (terminating the PreiodicRenew will call Session.Destroy),
and start over. In the worse case, the consul agents were split, and the
session still exists on the leader so we may need to wait for the old
session TTL, plus the LockWait time to renew the lock.

We use a Context for the cancellation channels here, because that
removes the need to worry about double-closes and nil channels. It
requires an awkward adapter goroutine for now to convert the Done()
`<-chan` to a `chan` for PeriodicRenew, but makes the rest of the code
safer in the long run.
2017-07-14 14:42:42 -04:00
James Bardin 82eba5801d Test losing and reacquiring a consul lock 2017-05-30 14:38:33 -04:00
James Bardin 3df48bfc27 relock consul when lock is lost
Consul locks are based on liveness, and may be lost due timeouts,
network issued, etc. If the client determines the lock was lost, attempt
to reacquire the lock immediately.

The client was also not using the `lock` config option. Disable locks if
that is not set.
2017-05-30 14:38:33 -04:00
James Bardin e8330b6f53 use CAS for consul state Put 2017-05-30 14:38:32 -04:00
James Bardin 5621d97925 cleanup consul lock entries
This matches the consul cli behavior, where locks are cleaned up after
use.

Return an error from re-locking the state. This isn't required by the
Locker interface, but it's an added sanity check for state operations.
What was incorrect here was returning an empty ID and error, which would
indicate that Lock/Unlock isn't supported.
2017-04-06 14:19:55 -04:00
James Bardin 75458a182d remove extra state.Locker assertions
All states are lockers, so get rid of extra asertions.
2017-04-01 17:01:45 -04:00
James Bardin 4980fa20e7 move s3 config from client to backend
The RemoteClient needs to be configured for the named state, so move the
general config to the backend.

Rename some fields for consistency.
2017-03-22 15:52:55 -04:00
Mitchell Hashimoto 0cd15176ff
backend/consul: rebase and modify gzip test 2017-03-14 17:59:54 -07:00
Mitchell Hashimoto 1daff7a826
backend/consul: support "lock" option to disable locking
This adds a "lock" config (default true) to allow users to optionally
disable state locking with Consul. This is necessary if the token given
doesn't have session permission and is necessary for backwards
compatibility.
2017-03-14 17:59:10 -07:00
James Bardin 08d2b44ada add gzip to consul backend tests 2017-03-14 15:41:00 -04:00
James Bardin 1527eae6b7 Merge pull request #8748 from christoe/christoe/8491-gzip-consul-remote-state
state/remote: Add gzip support to consul remote state (#8491)
2017-03-14 15:27:46 -04:00
James Bardin 86f711f6fc Make consul backend tests opt-in
This way we don't require contributers to have consul installed to run
make test.
2017-03-14 14:44:03 -04:00
James Bardin fa7743b627 quiet the consul server during backend tests
Don't display logs unless using `-v`
2017-03-14 10:49:38 -04:00
James Bardin 90055c6ae2 convert the consul backend to use consul/testutil
Start up our own consul server for unit tests.
2017-03-13 18:25:58 -04:00
Christoffer Kylvåg abfa35db7c backend/remote-state/consul: Make gzip compression configurable (#8491) 2017-03-13 08:17:33 +01:00
Christoffer Kylvåg e098c7c24a backend/remote-state/consul: Add gzip support to consul backend client (#8491) 2017-03-09 08:00:19 +01:00
Mitchell Hashimoto 35afb7bc86
backend/consul: some comments 2017-03-01 23:01:28 -08:00
Mitchell Hashimoto b842fd0c27
backend/consul: support named states 2017-03-01 22:58:51 -08:00
Mitchell Hashimoto 3db55cf747
backend/consul: build your own backend 2017-03-01 22:19:36 -08:00
Mitchell Hashimoto 549d525487 Merge pull request #12320 from hashicorp/b-legacy-state
command: fix loading legacy remote state + migration guide
2017-03-01 12:39:17 -08:00
Mitchell Hashimoto 6ea0dc0964
backend/consul: make address have a default to prevent input 2017-02-28 19:29:05 -08:00
James Bardin f866bb545c update remote-state/consul 2017-02-28 16:35:46 -05:00
Mitchell Hashimoto efe754183b
state/remote: export ClientLocker, test for implementation
This adds unit tests (that will fail at compile time) if various structs
don't implement the right interfaces for locking
2017-02-15 14:20:59 -08:00
James Bardin ec00564be6 Clean up LockInfo and LockError and use them
Gove LockInfo a Marshal method for easy serialization, and a String
method for more readable output.

Have the state.Locker implementations use LockError when possible to
return LockInfo and an error.
2017-02-15 14:44:43 -05:00
James Bardin 67bbebce08 Have consul state reutrn the lock ID
The lock ID isn't used because the lock is tied to the client, but
return the lock ID to match the behavior of other locks.
2017-02-15 14:44:43 -05:00
James Bardin cd233fef6a make consul client pass state.Locker tests 2017-02-15 14:41:55 -05:00
James Bardin 80fab23e04 Don't test consul using demo.consul.io
We shoudn't require an external service for unit test.

TODO: create some proper acceptance tests for consul
2017-02-08 11:34:31 -05:00
James Bardin 14d965722e Use single state.LockInfo struct
Remove redundant structures
2017-02-08 11:34:31 -05:00
James Bardin 9b76f6e138 Move TestRemoteLocks to state/remote
This was legacy remote state client and backends can use this test
function without an import cycle.
2017-02-08 11:25:52 -05:00
James Bardin 54cac349a3 Add state locking to consul backend
Use consul locks to implement state locking. The lock path is state path
+ "/.lock" which matches the consul cli default for locks. Lockinfo is
stored at path + "/.lockinfo".
2017-02-08 11:25:52 -05:00
Mitchell Hashimoto 1f5d425428
backend/remote-state
This allows migration of the remote state implementations to a richer
experience including input asking.
2017-01-26 14:33:49 -08:00