Commit graph

14 commits

Author SHA1 Message Date
Seth Hoenig 2631659551 ci: swap ci parallelization for unconstrained gomaxprocs 2022-03-15 12:58:52 -05:00
Seth Hoenig 519429a2de consul: probe consul namespace feature before using namespace api
This PR changes Nomad's wrapper around the Consul NamespaceAPI so that
it will detect if the Consul Namespaces feature is enabled before making
a request to the Namespaces API. Namespaces are not enabled in Consul OSS,
and require a suitable license to be used with Consul ENT.

Previously Nomad would check for a 404 status code when makeing a request
to the Namespaces API to "detect" if Consul OSS was being used. This does
not work for Consul ENT with Namespaces disabled, which returns a 500.

Now we avoid requesting the namespace API altogether if Consul is detected
to be the OSS sku, or if the Namespaces feature is not licensed. Since
Consul can be upgraded from OSS to ENT, or a new license applied, we cache
the value for 1 minute, refreshing on demand if expired.

Fixes https://github.com/hashicorp/nomad-enterprise/issues/575

Note that the ticket originally describes using attributes from https://github.com/hashicorp/nomad/issues/10688.
This turns out not to be possible due to a chicken-egg situation between
bootstrapping the agent and setting up the consul client. Also fun: the
Consul fingerprinter creates its own Consul client, because there is no
[currently] no way to pass the agent's client through the fingerprint factory.
2021-06-07 12:19:25 -05:00
Seth Hoenig f17ba33f61 consul: plubming for specifying consul namespace in job/group
This PR adds the common OSS changes for adding support for Consul Namespaces,
which is going to be a Nomad Enterprise feature. There is no new functionality
provided by this changeset and hopefully no new bugs.
2021-04-05 10:03:19 -06:00
Michael Schurter 6d095b3b36 consul: add test for check watcher deadlock 2019-07-18 08:24:09 -07:00
Michael Schurter 5407584bc3 consul: fix deadlock in check-based restarts
Fixes #5395
Alternative to #5957

Make task restarting asynchronous when handling check-based restarts.
This matches the pre-0.9 behavior where TaskRunner.Restart was an
asynchronous signal. The check-based restarting code was not designed
to handle blocking in TaskRunner.Restart. 0.9 made it reentrant and
could easily overwhelm the buffered update chan and deadlock.

Many thanks to @byronwolfman for his excellent debugging, PR, and
reproducer!

I created this alternative as changing the functionality of
TaskRunner.Restart has a much larger impact. This approach reverts to
old known-good behavior and minimizes the number of places changes are
made.
2019-07-17 15:22:21 -07:00
Alex Dadgar 7946a14aa8 Fix lints 2018-10-16 16:56:56 -07:00
Alex Dadgar 7739ef51ce agent + consul 2018-09-13 10:43:40 -07:00
Michael Schurter cfcbb9fa21 consul: periodically reconcile services/checks
Periodically sync services and checks from Nomad to Consul. This is
mostly useful when testing with the Consul dev agent which does not
persist state across restarts. However, this is a reasonable safety
measure to prevent skew between Consul's state and Nomad's
services+checks.

Also modernized the test suite a bit.
2018-04-19 15:45:42 -07:00
Michael Schurter 0f2a3dcec9 Test check watch updates 2017-09-14 16:48:39 -07:00
Michael Schurter 847fe080f6 Rename unhealthy var and fix test indeterminism 2017-09-14 16:48:39 -07:00
Michael Schurter 4ea19baa52 Handle multiple failing checks on a single task
Before this commit if a task had 2 checks cause restarts at the same
time, both would trigger restarts of the task! This change removes all
checks for a task whenever one of them is restarted.
2017-09-14 16:48:39 -07:00
Michael Schurter 73fb71ca10 RestartDelay isn't needed as checks are re-added on restarts
@dadgar made the excellent observation in #3105 that TaskRunner removes
and re-registers checks on restarts. This means checkWatcher doesn't
need to do *any* internal restart tracking. Individual checks can just
remove themselves and be re-added when the task restarts.
2017-09-14 16:48:39 -07:00
Michael Schurter 550e631eea Wrap check watch updates in a struct
Reusing checkRestart for both adds/removes and the main check restarting
logic was confusing.
2017-09-14 16:48:39 -07:00
Michael Schurter ade29ecbed Improve check watcher logging and add tests
Also expose a mock Consul Agent to allow testing ServiceClient and
checkWatcher from TaskRunner without actually talking to a real Consul.
2017-09-14 16:47:41 -07:00