* config: refactor ReadPath(s) methods without side-effects
Return the sources instead of modifying the state.
* config: clean data dir before every test
* config: add tests for config-file and config-dir
* config: add -config-format option
Starting with Consul 1.0 all config files must have a '.json' or '.hcl'
extension to make it unambigous how the data should be parsed. Some
automation tools generate temporary files by appending a random string
to the generated file which obfuscates the extension and prevents the
file type detection.
This patch adds a -config-format option which can be used to override
the auto-detection behavior by forcing all config files or all files
within a config directory independent of their extension to be
interpreted as of this format.
Fixes#3620
* Relaxes Autopilot promotion logic.
When we defaulted the Raft protocol version to 3 in #3477 we made
the numPeers() routine more strict to only count voters (this is
more conservative and more correct). This had the side effect of
breaking rolling updates because it's at odds with the Autopilot
non-voter promotion logic.
That logic used to wait to only promote to maintain an odd quorum
of servers. During a rolling update (add one new server, wait, and
then kill an old server) the dead server cleanup would still count
the old server as a peer, which is conservative and the right thing
to do, and no longer count the non-voter. This would wait to promote,
so you could get into a stalemate. It is safer to promote early than
remove early, so by promoting as soon as possible we have chosen
that as the solution here.
Fixes#3611
* Gets rid of unnecessary extra not-a-voter check.
The Docker agent closes the connection during read after we have
read the body. This causes a "connection reset by peer" even though
the command was successful.
We ignore that error here since we got the correct status code
and a response body.
The anti-entropy tests relied on the side-effect of the StartSync()
method to perform a full sync instead of a partial sync. This lead to
multiple anti-entropy go routines being started unnecessary retry loops.
This change changes the behavior to perform synchronous full syncs when
necessary removing the need for all of the time.Sleep and most of the
retry loops.
The state of the service and health check records was spread out over
multiple maps guarded by a single lock. Access to the maps has to happen
in a coordinated effort and the tests often violated this which made
them brittle and racy.
This patch replaces the multiple maps with a single one for both checks
and services to make the code less fragile.
This is also necessary since moving the local state into its own package
creates circular dependencies for the tests. To avoid this the tests can
no longer access internal data structures which they should not be doing
in the first place.
The tests still don't compile but this is a ncessary step in that
direction.
The anti-entropy code manages background synchronizations of the local
state on a regular basis or on demand when either the state has changed
or a new consul server has been added.
This patch moves the anti-entropy code into its own package and
decouples it from the local state code since they are performing
two different functions.
To simplify code-review this revision does not make any optimizations,
renames or refactorings. This will happen in subsequent commits.
Frank Schröder