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29 lines
1.1 KiB
Markdown
29 lines
1.1 KiB
Markdown
# Query Service
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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:
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- parse the request from Frontend
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- create relevant Druid queries (and all other supported database queries)
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- parse response from databases and handle error if any
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- build response in the format accepted by Frontend
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#### Druid Queries
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Internally we use both native and sql queries to Druid.
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#### Configuration
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Query Service needs below `env` variables to run:
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```
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DruidClientUrl: http://signoz-druid-router:8888
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DruidDatasource: flattened_spans
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```
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The above values are the default ones used by SigNoz and are kept at `deploy/kubernetes/platform/signoz-charts/query-service/values.yaml`
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#### Build and Run locally
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```console
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cd pkg/query-service
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go build -o build/query-service main.go
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DruidClientUrl=xxxx DruidDatasource=flattened_spans build/query-service
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```
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#### Docker Images
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The docker images of query-service is available at https://hub.docker.com/r/signoz/query-service |