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An HTTP service for the controlling of data relevant to the filtering of a particular dataset.
| Environment variable | Default | Description |
|---|---|---|
| API_ROUTER_URL | http://localhost:23200/v1 | The URL of the API Router |
| BATCH_MAX_WORKERS | 100 | maximum number of concurrent go-routines requesting items concurrently from APIs with pagination |
| BATCH_SIZE_LIMIT | 1000 | maximum limit value to get items from APIs in a single call |
| BIND_ADDR | http://localhost:20001 | The host and port to bind to. |
| DEBUG | false | Enable local debugging |
| DOWNLOAD_SERVICE_URL | http://localhost:23600 | The URL of the download service |
| ENABLE_DATASET_PREVIEW | false | Flag to add preview of dataset to output page |
| ENABLE_PROFILER | false | Flag to enable go profiler |
| GRACEFUL_SHUTDOWN_TIMEOUT | 5s | The graceful shutdown timeout in seconds |
| HEALTHCHECK_CRITICAL_TIMEOUT | 90s | The time taken for the health changes from warning state to critical due to subsystem check failures |
| HEALTHCHECK_INTERVAL | 30s | The time between calling healthcheck endpoints for check subsystems |
| MAX_DATASET_OPTIONS | 200 | maximum number of IDs that will be requested to dataset API in a single call as query parmeters |
| PATTERN_LIBRARY_ASSETS_PATH | "" | Pattern library location |
| PPROF_TOKEN | "" | The profiling token to access service profiling |
| SEARCH_API_AUTH_TOKEN | n/a | The token used to access the Search API |
| SITE_DOMAIN | string | Domain taken from environment configs |
| OTEL_EXPORTER_OTLP_ENDPOINT | localhost:4317 | Endpoint for OpenTelemetry service |
| OTEL_SERVICE_NAME | dp-frontend-filter-dataset-controller | Label of service for OpenTelemetry service |
| OTEL_BATCH_TIMEOUT | 5s | Timeout for OpenTelemetry |
HEALTHCHECK_INTERVAL and HEALTHCHECK_CRITICAL_TIMEOUT can use the following formats to represent duration of time:
"300ms" = 300 milliseconds
"1.5h" = 1.5 hours
"2h45m" = 2 hours 45 minutes
Valid time units are
"ns" = nanosecond
"us" (or "µs") = microsecond
"ms" = millisecond
"s" = second
"m" = minute
"h" = hour
An optional /debug endpoint has been added, in order to profile this service via pprof go library.
In order to use this endpoint, you will need to enable profiler flag and set a PPROF_TOKEN:
export ENABLE_PROFILER=true
export PPROF_TOKEN={generated uuid}
Then you can us the profiler as follows:
1- Start service, load test or if on environment wait for a number of requests to be made.
2- Send authenticated request and store response in a file (this can be best done in command line like so: curl <host>:<port>/debug/pprof/heap -H "Authorization: Bearer {generated uuid} > heap.out - see pprof documentation on other endpoints
3- View profile either using a web ui to navigate data (a) or using pprof on command line to navigate data (b)
- a =
go tool pprof -http=:8080 heap.out - b =
go tool pprof heap.out, -o flag to see various options
See CONTRIBUTING for details
Copyright © 2023, Office for National Statistics (https://www.ons.gov.uk)
Released under MIT license, see LICENSE for details.