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From the Go specification [1]: "1. For a nil slice, the number of iterations is 0." "3. If the map is nil, the number of iterations is 0." Therefore, an additional nil check for before the loop is unnecessary. [1]: https://go.dev/ref/spec#For_range Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>
Query Service
Query service is the interface between frontend 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 Clickhouse queries (and all other supported database queries)
- parse response from databases and handle error if any
- clickhouse response in the format accepted by Frontend
Complete the clickhouse setup locally.
- Comment out the query-service and the frontend section in
signoz/deploy/docker/clickhouse-setup/docker-compose.yaml - Change the alertmanager section in
signoz/deploy/docker/clickhouse-setup/docker-compose.yamlas follows:
alertmanager:
image: signoz/alertmanager:0.23.4
volumes:
- ./data/alertmanager:/data
expose:
- "9093"
ports:
- "8080:9093"
# depends_on:
# query-service:
# condition: service_healthy
restart: on-failure
command:
- --queryService.url=http://172.17.0.1:8085
- --storage.path=/data
- Run the following:
cd signoz/
If you are using x86_64 processors (All Intel/AMD processors) run sudo make run-x86
If you are on arm64 processors (Apple M1 Macs) run sudo make run-arm
Backend Configuration
-
Open ./constants/constants.go
- Replace
const RELATIONAL_DATASOURCE_PATH = "/var/lib/signoz/signoz.db"
withconst RELATIONAL_DATASOURCE_PATH = "./signoz.db".
- Replace
-
Query Service needs below
envvariables to run:
export ClickHouseUrl=tcp://localhost:9001
export STORAGE=clickhouse
export ALERTMANAGER_API_PREFIX=http://localhost:9093/api/
Build and Run locally
cd pkg/query-service
go build -o build/query-service main.go
ClickHouseUrl=tcp://localhost:9001 STORAGE=clickhouse build/query-service --prefer-delta=true
Frontend Configuration for local query-service.
- Set the following environment variables
export FRONTEND_API_ENDPOINT=http://localhost:8080
- Run the following
cd signoz\frontend\
yarn install
yarn dev
Note:
If you use go version 1.18 for development and contributions, then please checkout the following issue. https://github.com/SigNoz/signoz/issues/1371
Docker Images
The docker images of query-service is available at https://hub.docker.com/r/signoz/query-service