Configuration

Key	Default	Notes
`endpoint`	(required)	OTLP base URL, e.g. `http://localhost:4000/v1/otlp`. The plugin appends each signal's `/v1/{traces,metrics,logs}` suffix; a per-signal path is rejected at load.
`database`	`public`	Sent as `X-Greptime-DB-Name`.
`username` / `password`	(none)	Basic auth. Both or neither.
`signals`	all three	Any subset of `traces`, `metrics`, `logs`. A disabled signal builds no exporter.
`content`	`none`	How much payload may leave the process. See What leaves the machine.
`serviceName`	`dsh`	OTel `service.name`.
`logTable` / `traceTable`	GreptimeDB defaults	Destination table overrides.
`ttl`	`180d`	Retention for the log and trace tables this plugin creates, sent as `x-greptime-hints`. Also accepts `forever`. GreptimeDB applies it when it auto-creates the table; an existing table keeps its own until `ALTER TABLE`. Metric tables are not covered — see Known limitations. Set it empty to send no hint and inherit the database default.
`shutdownTimeoutMillis`	`3000`	Deadline for the entire teardown sequence.
`metricIntervalMillis`	`30000`	Metric collection period. Must be at least `exportTimeoutMillis`.
`maxExportBatchSize` / `maxQueueSize`	`512` / `2048`	Batch and buffer bounds.
`scheduledDelayMillis` / `exportTimeoutMillis`	`5000` / `30000`	Export cadence and per-request deadline.

Bad configuration fails at plugin load with the offending field named, not at the first export.

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