63 Commits (898271b22aa1333a4c4ad6cf74b838df3faa3db4)

Author	SHA1	Message	Date
Chris Marchbanks	a38a54fa11	Split remote write storage into its own type ... This allows other processes to reuse just the remote write code without having to use the remote read code as well. This will be used to create a sidecar capable of sending remote write payloads. Signed-off-by: Chris Marchbanks <csmarchbanks@gmail.com>	6 years ago
Tom Wilkie	67da8e7b46	Refactor and fix queue resharding (#5286) ... - Remove prometheus_remote_queue_last_send_timestamp_seconds metric. Its not particularly useful, we have highest_timestamp_seconds. - Factor out maxGauage, a gauge that only increases. - Change sharding calculations to use max samples in timestamp - max samples out timestamp (not rates). - Also include the ratio of samples dropped to correctly predict number of pending samples. Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>	6 years ago
Tom Wilkie	37ad4db485	Export timestamps in seconds since epoch. ... Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>	6 years ago
Tom Wilkie	b93bafeee1	Various fixes to locking & shutdown for WAL-based remote write. ... - Remove datarace in the exported highest scrape timestamp. - Backoff on enqueue should be per-sample - reset the result for each sample. - Remove diffKeys, unused ctx and cancelfunc in WALWatcher, 'name' from writeTo interface, and pass it to constructor. - Reorder functions in WALWatcher depth-first according to call graph. - Fix vendor/modules.txt. - Split out the various timer periods into consts at the top of the file. - Move w.currentSegmentMetric.Set close to where we set the currentSegment. - Combine r.Next() and isClosed(w.quit) into a single loop. - Unnest some ifs in WALWatcher.watch, propagate erros in decodeRecord, add some new lines to make it easier to read. - Reorganise checkpoint handling to reduce nesting and make it easier to follow. Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>	6 years ago
Callum Styan	6f69e31398	Tail the TSDB WAL for remote_write ... This change switches the remote_write API to use the TSDB WAL. This should reduce memory usage and prevent sample loss when the remote end point is down. We use the new LiveReader from TSDB to tail WAL segments. Logic for finding the tracking segment is included in this PR. The WAL is tailed once for each remote_write endpoint specified. Reading from the segment is based on a ticker rather than relying on fsnotify write events, which were found to be complicated and unreliable in early prototypes. Enqueuing a sample for sending via remote_write can now block, to provide back pressure. Queues are still required to acheive parallelism and batching. We have updated the queue config based on new defaults for queue capacity and pending samples values - much smaller values are now possible. The remote_write resharding code has been updated to prevent deadlocks, and extra tests have been added for these cases. As part of this change, we attempt to guarantee that samples are not lost; however this initial version doesn't guarantee this across Prometheus restarts or non-retryable errors from the remote end (eg 400s). This changes also includes the following optimisations: - only marshal the proto request once, not once per retry - maintain a single copy of the labels for given series to reduce GC pressure Other minor tweaks: - only reshard if we've also successfully sent recently - add pending samples, latest sent timestamp, WAL events processed metrics Co-authored-by: Chris Marchbanks <csmarchbanks.com> (initial prototype) Co-authored-by: Tom Wilkie <tom.wilkie@gmail.com> (sharding changes) Signed-off-by: Callum Styan <callumstyan@gmail.com>	6 years ago
Julius Volz	8fbe1b5133	Handle a bunch of unchecked errors (#4461) ... There are many more (mostly finalizers like Close/Stop/etc.), but most of the others seemed like one couldn't do much about them anyway. Signed-off-by: Julius Volz <julius.volz@gmail.com>	6 years ago
Krasi Georgiev	b75428ec19	rename package retrieve to scrape ... no fucnctinal changes just renaming retrieval to scrape	7 years ago
Tom Wilkie	e8c264e47a	Add comment.	7 years ago
Tom Wilkie	56820726fa	Move a couple of the encoding/decoding functions into codec.go	7 years ago
Julius Volz	c3d6abc8e6	Fix some lint errors (#3334) ... I left the promql ones and some others untouched as I remember that @fabxc prefers them that way.	7 years ago
Fabian Reinartz	0efecea6d4	Adapt storage APIs to uint64 references	7 years ago
Tom Wilkie	db8128ceeb	Add label set as first parameter to AddFast, ingored by TSDB adapter.	7 years ago
Tom Wilkie	2dda5775e3	Initial port of remote storage to v2.	7 years ago