When discussing #801, I remembered #794. While dealing with the
latter, I read the HTTP RFC, stumbling upon the following:
When a request method is received
that is unrecognized or not implemented by an origin server, the
origin server SHOULD respond with the 501 (Not Implemented) status
code. When a request method is received that is known by an origin
server but not allowed for the target resource, the origin server
SHOULD respond with the 405 (Method Not Allowed) status code.
Concluding from that, it is possible that a server desiring a fallback
to GET will send a status code of 501. It is even preferred if that
server does not offer any resource to be used with the POST method.
Therefore, I think we should fallback to GET on a 501, too.
Signed-off-by: beorn7 <beorn@grafana.com>
Introduces support for the new metadata endpoint from Prometheus. The new endpoint provides information independent of targets and collapses the unique combinations of HELP, TYPE and UNIT.
Fixes#705
Signed-off-by: gotjosh <josue@grafana.com>
This allows us to simplify a bunch of code while still supporting the
last four Go minor versions.
We have also run into minor annoyances a couple of times by now to
keep supporting 1.7 and 1.8.
It's time to pull the plug!
Signed-off-by: Bjoern Rabenstein <bjoern@rabenste.in>
This PR adds support for fetching [rules](https://prometheus.io/docs/prometheus/latest/querying/api/#rules) via the `/api/v1/rules` endpoint using the API client. Currently, the API client exposes no way to do this and it would be nice to have for external systems that wish to retrieve this information.
400 and 422 are documented error codes from Prometheus, so we should
attempt to parse the error returned for both of them.
Needed to change a test that was requiring the old behaviour - made it
use 500 instead of 400.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
This commit creates a new package to hold the prometheus
v1 API interface. This interface will contain all the funcionality
exposed by Prometheus v1 HTTP API.
The underlying http client is kept on the api package since it
may be reused across diferent API versions and also by the Alertmanager
api package (to come.)
Kien Nguyen