hyperdx/smoke-tests/otel-collector/json-exporter.bats
Warren Lee cb841457f2
[HDX-3994] Deprecate clickhouse.json feature gate in favor of per-exporter json config (#2119)
## Summary

Deprecate the upstream-deprecated `--feature-gates=clickhouse.json` CLI flag in favor of the per-exporter `json: true` config option, as recommended by the OpenTelemetry ClickHouse exporter v0.149.0.

This introduces a new env var `HYPERDX_OTEL_EXPORTER_CLICKHOUSE_JSON_ENABLE` that controls JSON mode at the exporter config level. The old `OTEL_AGENT_FEATURE_GATE_ARG` env var remains backward-compatible — when it contains `clickhouse.json`, the entrypoint strips that gate, maps it to the new env var, and prints a deprecation warning. Other feature gates are preserved and passed through to the collector.

**Key changes:**
- **`docker/otel-collector/entrypoint.sh`** — Detects `clickhouse.json` in `OTEL_AGENT_FEATURE_GATE_ARG`, strips it, sets `HYPERDX_OTEL_EXPORTER_CLICKHOUSE_JSON_ENABLE=true`, and prints a deprecation warning. Remaining feature gates are still passed through to the collector in both standalone and supervisor modes.
- **`docker/otel-collector/config.standalone.yaml`** — Added `json: ${env:HYPERDX_OTEL_EXPORTER_CLICKHOUSE_JSON_ENABLE:-false}` to both ClickHouse exporter configs
- **`packages/api/src/opamp/controllers/opampController.ts`** — Added `json` field to the `CollectorConfig` type and both ClickHouse exporter configs for OpAMP-managed collectors
- **`docker/otel-collector/supervisor_docker.yaml.tmpl`** — Feature gate pass-through preserved for non-`clickhouse.json` gates (entrypoint strips the deprecated gate before supervisor template renders)
- **`smoke-tests/otel-collector/`** — Added a JSON-enabled otel-collector service and smoke tests verifying:
  - `ResourceAttributes` and `LogAttributes` columns in `otel_logs` are `JSON` type (not `Map`)
  - Log data with various attribute types (string, int, boolean) is inserted and queryable via JSON path access

### How to test locally or on Vercel

1. Run `yarn dev` to start the dev stack
2. Verify the `otel-collector-json` container starts without errors (the `clickhouse.json` feature gate is stripped, not passed to the collector)
3. Check container logs for the deprecation warning when `OTEL_AGENT_FEATURE_GATE_ARG` contains `clickhouse.json`
4. Verify the non-JSON `otel-collector` service continues to work normally (json defaults to false)
5. Run smoke tests: `cd smoke-tests/otel-collector && bats json-exporter.bats`

### References

- Linear Issue: https://linear.app/hyperdx/issue/HDX-3994
- Upstream deprecation: https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/exporter/clickhouseexporter#experimental-json-support
2026-04-15 15:49:45 +00:00

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Bash

#!/usr/bin/env bats
load 'test_helpers/utilities.bash'
load 'test_helpers/assertions.bash'
@test "HDX-3994: JSON exporter creates otel_logs table with JSON column types for ResourceAttributes and LogAttributes" {
assert_test_data "data/json-exporter/column-types"
}
@test "HDX-3994: JSON exporter inserts log data with attributes accessible via JSON path" {
emit_otel_data "http://localhost:14318" "data/json-exporter/basic-insert"
sleep 2
assert_test_data "data/json-exporter/basic-insert"
}