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* Add metrics-generator component * Add some initial logic to make the generator module optional * Rename tempo_distributor_metrics_generator_clients metric * Periodical check in: add remote-write setup * jsonnet: rename generator -> metrics_generator * Periodical check in: add instance, copy servicegraphprocessor over, add scrape endpoint * Fix make test * Support spanmetrics via OTel collector Generator is now able to run an embedded OTel collector. This allows to run any number of processors, which includes spanmetrics. This collector uses a custom metrics exporter and a remote write client. Metrics generated by the spanmetrics processor are converted to Prometheus and appended to the remote write client's WAL, which will export the metric data after commit. * Implement internal spanmetrics processor * Add latency metrics * Only loop one for latency metrics * Improve how metrics are collected, some bug fixes Changes: - Remote write was constantly failing with “out of order samples”. Fix: apparently the timestamp has to be in milliseconds, not in seconds. There is not a lot of documentation on the Prometheus interfaces, but the cortex proto has a field timestampMs. - After this remote write was failing with label name \"le\" is not unique: invalid sample. Fix: there was a bug in the append logic of the labels array. Since you were reusing the labels variable in a for-loop, the le label was added multiple times. Initially I thought pushing metrics on every push request was causing the out-of-order issues, so I refactored the processor a bit to have both a PushSpans and a CollectMetrics method. CollectMetrics is called every 15s with a storage.Appender. This way we can also use a single appender for multiple processors, This wasn’t necessary to get it working, but I think this is the logic we want to end up with (i.e. don’t send samples too often to keep DPM low). * make vendor-check * Add spanmetrics_test.go * jsonnet: add metrics-generator service * Add distributor.enable_metrics_generator_ring; some bug fixes * Remove unused Registerer and scrape endpoint code; sprinkle some more TODO's around * Add crude mechanism to trim active series in span metrics processor * span metrics: add delete_after_last_update * Admit config parameters in spanmetrics processor Histogram buckets and additional dimensions can be configured * Initial implementation of service graphs processor * Hook up service graph processor Store - make sure tests pass - fix copy-paste error in shouldEvictHead Service graphs - ensure metric names align with agent - server latencies were overwriting client latencies - expose operational metrics * Rename metrics from generator_processor_... to metrics_generator_processor_... * Set up BasicLifecycler, load balance spans across metrics-generator * Replace processor.CollectMetrics with a custom prometheus.Registerer Changes: Service graphs processor - replaced code to manually build metrics with CounterVec and HistogramVec - aligned metric names with the agent - commented out code around collectCh, this was leaking memory Span metrics processor - replaced code to manually build metrics with CounterVec and HistogramVec Introduced Registry to bridge prometheus.Registerer and storage.Appender Add support for configuring external labels Fix generator_test.go * make vendor-check * Refactor remote-write structures, add tests * Add add_instance_id_label config * Split write requests up to a max msg size Builds write requests up to a max size and sends them sequentially. * Service graphs: collect edges when completed When an edge is completed, it's sent to be collected by a number of goroutines that call collectEdge. Edges can also be collected when expired. * Store: interface: give paramaters names * Service graphs: Close closech * Simplify evict method name * Move remote_write to its own method * Add metrics_generator_processors to overrides, dynamically create/remove processors * Add tests for split requests in remote write appender * Refactor distributor code a bit * Make collection interval configurable * Add concurrency test for instance * Minor tweaks * Add metrics to track failed active processors updates * Tweak remote write metrics * Add exemplars support * Fix latency measurement in spanmetrics processor * Fix typo * Change metrics generator enabled config var * Return ready when generator is registered in the ring * Add read-only mode during generator shutdown * Configure docker-compose distributed to work with metrics generator * Enable pushing bytes to metrics-generator * Remove cortex from distributed example * Replace cortexpb -> prompb, move all remote-write stuff into remotewrite package * Set context timeout when collecting metrics, remove hola * Protect readOnly from concurrency * Update vendor * Rename metrics prefix span_metrics to spanmetrics This matches the naming from OTel spanmetrics processor * Always add le="+Inf" bucket when not set already * Fix lint errors * Fix compactor test Test was writing tempodb.Trace to the WAL, instead of tempodb.TraceBytes * Move expire goroutine to collector workers * Move metrics_generator_enabled to the top-level config * Update docker-compose distributor example * Use snappy from klauspost/compress * Fix distributor test after moving metrics_generator_enabled flag * Reorganize how processors are updated, simplify use of locks * Stub time in processor tests * Fix how label slices are handled in registry * jsonnet: disable metrics-generator by default * Regenerate kube manifests * Pin time.Now in test with registry * Update CHANGELOG.md Co-authored-by: Koenraad Verheyden <[email protected]>
202 lines
11 KiB
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202 lines
11 KiB
Plaintext
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