Change Marathon provider to make just one API call instead of two per
configuration update by means of specifying embedded resources, which
enable retrieving multiple response types from the API at once. Apart
from the obvious savings in API calls, we primarily gain a consistent
view on both applications and tasks that allows us to drop a lot of
correlation logic. Additionally, it will serve as the basis for the
introduction of readiness checks which require application/task
consistency for correct leverage on the proxy end.
Additional changes:
marathon.go:
- Filter on tasks now embedded inside the applications.
- Reduce/simplify signature on multiple template functions as we do not
need to check for proper application/task correlation anymore.
- Remove getFrontendBackend in favor of just getBackend.
- Move filtering on enabled/exposed applications from `taskFilter` to
`applicationFilter`. (The task filter just reached out to the
applications anyway, so it never made sense to locate it with the
tasks where the filter was called once for every task even though the
result would never change.)
- Remove duplicate constraints filter in tasks, where it neither made
sense to keep as it operates on the application level only.
- Add context to rendering error.
marathon_test.go:
- Simplify and reduce numerous tests.
- Convert tests with high number of cases into parallelized sub-tests.
- Improve readability/structure for several tests.
- Add missing test for enabled/exposed applications.
- Simplify the mocked Marathon server.
marathon.tmpl:
- Update application/task iteration.
- Replace `getFrontendBackend` by `getBackend`.
When Secrets permissions have not been granted (which is likely to be
the case for users not needing the basic auth feature), the watch on the
Secrets API will never yield a response, thereby causing the controller
to never sync successfully, and in turn causing the check for all
controller synchronizations to fail consistently. Thus, no event will
ever be handled.
Update traefik dependencies (docker/docker and related)
- Update dependencies
- Fix compilation problems
- Remove vdemeester/docker-events (in docker api now)
- Remove `integration/vendor`
- Use `testImport`
- update some deps.
- regenerate the lock from scratch (after a `glide cc`)
Introduces Rancher's metadata service as an optional provider source for
Traefik, enabled by setting `rancher.MetadataService`.
The provider uses a long polling technique to watch the metadata service and
obtain near instantaneous updates. Alternatively it can be configured to poll
the metadata service every `rancher.RefreshSeconds` by setting
`rancher.MetadataPoll`.
The refactor splits API and metadata service code into separate source
files respectively, and specific configuration is deferred to
sub-structs.
Incorporates bugfix #1414
This was likely just a copy-paste issue, the bug should be benign because the secret is cast to the correct type later, but the additional logging is a major annoyance, and is happening even if basic auth is not in use with Kubernetes.
We previously fell back to using ClusterIPs. However, the approach can
lead to all kinds of problems since Ingresses rely on being able to talk
to Endpoints directly. For instance, it can break stickiness and
retries.
Instead of doing sanity checks in the Kubernetes provider, we just
accept any non-empty value from the annotation and rely on the server
part to filter out unknown rules.
This allows us to automatically stay in sync with the currently
supported Path matchers/modifiers.
A missing annotation would previously be handled in the default error
case, causing a noisy warning-level log message to be generated each
time.
We add another case statement to ignore the case where the annotation is
missing from the annotations map.
Also piggybacking a minor improvement to the log message.
- Improves default filtering behavior to filter by container health/healthState
- Optionally allows filtering by service health/healthState
- Allows configuration of refresh interval
For the two existing health check parameters (path and interval), we add
support for Marathon labels.
Changes in detail:
- Extend the Marathon provider and template.
- Refactor Server.loadConfig to reduce duplication.
- Refactor the healthcheck package slightly to accommodate the changes
and allow extending by future parameters.
- Update documentation.
