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32ad4ef571
* WIP promql support * forked prometheus and promhouse integrated * removing __debug_bin from git * feat: prometheus config file to load * feat: read prometheus config from args * fix: WIP fixing errors in docker build * feat: added clickhousemetricswrite exporter in metrics * feat: changing otelcol image tag * fix: read prometheus.yml from config flag in docker-compose * fix: WIP clickhouse connection error * fix: used signoz/prometheus tag v1.9.4 * chore: response format as in prometheus * chore: query_range works with clickhouse reader and throws not implemented error for druid * chore: moved ApiError struct to model * feat: enabled instant query api for metrics * chore: parser for instant query api params
Query Service
Query service is the interface between forntend and databases. It is written in Golang. It will have modules for all supported databases. Query service is responsible to:
- parse the request from Frontend
- create relevant Druid queries (and all other supported database queries)
- parse response from databases and handle error if any
- build response in the format accepted by Frontend
Druid Queries
Internally we use both native and sql queries to Druid.
Configuration
Query Service needs below env variables to run:
DruidClientUrl: http://signoz-druid-router:8888
DruidDatasource: flattened_spans
The above values are the default ones used by SigNoz and are kept at deploy/kubernetes/platform/signoz-charts/query-service/values.yaml
Build and Run locally
cd pkg/query-service
go build -o build/query-service main.go
DruidClientUrl=xxxx DruidDatasource=flattened_spans build/query-service
Docker Images
The docker images of query-service is available at https://hub.docker.com/r/signoz/query-service