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openetelemetry: Implement cmetrics max datapoints and its splitting #12251

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openetelemetry: Implement cmetrics max datapoints and its splitting #12251

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bf99285
http_client: Set up recycle connection properly
cosmo0920 Aug 10, 2026
8c9181f
lib: cmetrics: Implement batch operations for Otel
cosmo0920 Aug 17, 2026
5c825b6
out_opentelemetry: Support batch operations for metrics with max data…
cosmo0920 Aug 10, 2026
e44d29b
tests: internal: Add a test case for batch request with data points' …
cosmo0920 Aug 10, 2026
85dba5f
tests: integration: Add e2e cases for the limitation of max data points
cosmo0920 Aug 10, 2026
fe50e1d
input_chunk: Added overflow-safe remaining-space checks
cosmo0920 Aug 17, 2026
3808f85
tests: internal: Add assertions for overflow-safe remaining-space checks
cosmo0920 Aug 17, 2026
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4 changes: 4 additions & 0 deletions include/fluent-bit/flb_input_chunk.h
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Original file line number Diff line number Diff line change
Expand Up @@ -177,6 +177,10 @@ int flb_input_chunk_set_up_down(struct flb_input_chunk *ic);
int flb_input_chunk_set_up(struct flb_input_chunk *ic);
int flb_input_chunk_down(struct flb_input_chunk *ic);
int flb_input_chunk_is_up(struct flb_input_chunk *ic);
int flb_input_chunk_find_space_new_data(struct flb_input_chunk *ic,
size_t chunk_size);
int flb_input_chunk_has_overlimit_routes(struct flb_input_chunk *ic,
size_t chunk_size);
void flb_input_chunk_update_output_instances(struct flb_input_chunk *ic,
size_t chunk_size);

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29 changes: 29 additions & 0 deletions lib/cmetrics/include/cmetrics/cmt_encode_opentelemetry.h
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Expand Up @@ -40,7 +40,36 @@ struct cmt_opentelemetry_context
struct cmt *cmt;
};

struct cmt_opentelemetry_batch {
cfl_sds_t payload;
size_t data_point_count;
};

struct cmt_opentelemetry_batches {
size_t count;
struct cmt_opentelemetry_batch *entries;
};

cfl_sds_t cmt_encode_opentelemetry_create(struct cmt *cmt);
void cmt_encode_opentelemetry_destroy(cfl_sds_t text);

/*
* Split an encoded OTLP ExportMetricsServiceRequest without changing metric,
* resource, or scope metadata. A zero limit returns the original request as a
* single batch. The returned payloads are owned by the batch collection.
*/
struct cmt_opentelemetry_batches *
cmt_encode_opentelemetry_split_payload(const void *payload,
size_t payload_size,
size_t max_data_points,
int *result);

struct cmt_opentelemetry_batches *
cmt_encode_opentelemetry_create_batches(struct cmt *context,
size_t max_data_points,
int *result);

void cmt_encode_opentelemetry_destroy_batches(
struct cmt_opentelemetry_batches *batches);

#endif
1 change: 1 addition & 0 deletions lib/cmetrics/src/CMakeLists.txt
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Expand Up @@ -26,6 +26,7 @@ set(src
cmt_filter.c
cmetrics.c
cmt_encode_opentelemetry.c
cmt_encode_opentelemetry_batch.c
cmt_decode_opentelemetry.c
cmt_encode_prometheus.c
cmt_encode_prometheus_remote_write.c
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