README
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dp-frontend-dataset-controller
An HTTP service for the controlling of data relevant to a particular dataset.
Configuration
| Environment variable | Default | Description |
|---|---|---|
| BIND_ADDR | :20200 | The host and port to bind to. |
| RENDERER_URL | http://localhost:20010 | The URL of dp-frontend-renderer. |
| DATASET_API_URL | http://localhost:22000 | The URL of dp-dataset-api. |
| FILTER_API_URL | http://localhost:22100 | The URL of dp-filter-api. |
| ZEBEDEE_URL | http://localhost:8082 | The URL of zebedee. |
| DOWNLOAD_SERVICE_URL | http://localhost:23600 | The URL of dp-download-service. |
| GRACEFUL_SHUTDOWN_TIMEOUT | 5s | The graceful shutdown timeout in seconds |
| HEALTHCHECK_INTERVAL | 30s | The time between calling healthcheck endpoints for check subsystems |
| HEALTHCHECK_CRITICAL_TIMEOUT | 90s | The time taken for the health changes from warning state to critical due to subsystem check failures |
| ENABLE_PROFILER | false | Flag to enable go profiler |
| PPROF_TOKEN | "" | The profiling token to access service profiling |
Profiling
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
Licence
Copyright © 2017 2020, Office for National Statistics (https://www.ons.gov.uk)
Released under MIT license, see LICENSE for details.
Documentation
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