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* Fix linting errors Signed-off-by: Rodney Osodo <28790446+rodneyosodo@users.noreply.github.com> * feat(linters): add ineffassign linter This commit adds the `ineffassign` linter to the project's `.golangci.yml` configuration file. The `ineffassign` linter helps identify and flag assignments to variables that are never used, helping to improve code quality and maintainability. Signed-off-by: Rodney Osodo <28790446+rodneyosodo@users.noreply.github.com> * Add extra linters Signed-off-by: Rodney Osodo <28790446+rodneyosodo@users.noreply.github.com> * feat(golangci): Add header check - Added goheader check to ensure all files have license headers - Added build tags for "nats" in the .golangci.yml file to include the necessary dependencies for the "nats" package during the build process. - Also, increased the maximum number of issues per linter and the maximum number of same issues reported by the linter to improve the code quality analysis. Signed-off-by: Rodney Osodo <28790446+rodneyosodo@users.noreply.github.com> * feat(.golangci.yml): Add new linters Add the following new linters to the .golangci.yml configuration file: - asasalint - asciicheck - bidichk - contextcheck - decorder - dogsled - errchkjson - errname - execinquery - exportloopref - ginkgolinter - gocheckcompilerdirectives These linters will help improve code quality and catch potential issues during the code review process. Signed-off-by: Rodney Osodo <28790446+rodneyosodo@users.noreply.github.com> --------- Signed-off-by: Rodney Osodo <28790446+rodneyosodo@users.noreply.github.com>
Postgres reader
Postgres reader provides message repository implementation for Postgres.
Configuration
The service is configured using the environment variables presented in the following table. Note that any unset variables will be replaced with their default values.
| Variable | Description | Default |
|---|---|---|
| MF_POSTGRES_READER_LOG_LEVEL | Service log level | info |
| MF_POSTGRES_READER_HTTP_HOST | Service HTTP host | localhost |
| MF_POSTGRES_READER_HTTP_PORT | Service HTTP port | 9009 |
| MF_POSTGRES_READER_HTTP_SERVER_CERT | Service HTTP server cert | "" |
| MF_POSTGRES_READER_HTTP_SERVER_KEY | Service HTTP server key | "" |
| MF_POSTGRES_HOST | Postgres DB host | localhost |
| MF_POSTGRES_PORT | Postgres DB port | 5432 |
| MF_POSTGRES_USER | Postgres user | mainflux |
| MF_POSTGRES_PASS | Postgres password | mainflux |
| MF_POSTGRES_NAME | Postgres database name | messages |
| MF_POSTGRES_SSL_MODE | Postgres SSL mode | disabled |
| MF_POSTGRES_SSL_CERT | Postgres SSL certificate path | "" |
| MF_POSTGRES_SSL_KEY | Postgres SSL key | "" |
| MF_POSTGRES_SSL_ROOT_CERT | Postgres SSL root certificate path | "" |
| MF_THINGS_AUTH_GRPC_URL | Things service Auth gRPC URL | localhost:7000 |
| MF_THINGS_AUTH_GRPC_TIMEOUT | Things service Auth gRPC timeout in seconds | 1s |
| MF_THINGS_AUTH_GRPC_CLIENT_TLS | Things service Auth gRPC TLS mode flag | false |
| MF_THINGS_AUTH_GRPC_CA_CERTS | Things service Auth gRPC CA certificates | "" |
| MF_AUTH_GRPC_URL | Users service gRPC URL | localhost:7001 |
| MF_AUTH_GRPC_TIMEOUT | Users service gRPC request timeout in seconds | 1s |
| MF_AUTH_GRPC_CLIENT_TLS | Users service gRPC TLS mode flag | false |
| MF_AUTH_GRPC_CA_CERTS | Users service gRPC CA certificates | "" |
| MF_JAEGER_URL | Jaeger server URL | http://jaeger:14268/api/traces |
| MF_SEND_TELEMETRY | Send telemetry to mainflux call home server | true |
| MF_POSTGRES_READER_INSTANCE_ID | Postgres reader instance ID |
Deployment
The service itself is distributed as Docker container. Check the postgres-reader service section in
docker-compose to see how service is deployed.
To start the service, execute the following shell script:
# download the latest version of the service
git clone https://github.com/mainflux/mainflux
cd mainflux
# compile the postgres writer
make postgres-writer
# copy binary to bin
make install
# Set the environment variables and run the service
MF_POSTGRES_READER_LOG_LEVEL=[Service log level] \
MF_POSTGRES_READER_HTTP_HOST=[Service HTTP host] \
MF_POSTGRES_READER_HTTP_PORT=[Service HTTP port] \
MF_POSTGRES_READER_HTTP_SERVER_CERT=[Service HTTPS server certificate path] \
MF_POSTGRES_READER_HTTP_SERVER_KEY=[Service HTTPS server key path] \
MF_POSTGRES_HOST=[Postgres host] \
MF_POSTGRES_PORT=[Postgres port] \
MF_POSTGRES_USER=[Postgres user] \
MF_POSTGRES_PASS=[Postgres password] \
MF_POSTGRES_NAME=[Postgres database name] \
MF_POSTGRES_SSL_MODE=[Postgres SSL mode] \
MF_POSTGRES_SSL_CERT=[Postgres SSL cert] \
MF_POSTGRES_SSL_KEY=[Postgres SSL key] \
MF_POSTGRES_SSL_ROOT_CERT=[Postgres SSL Root cert] \
MF_THINGS_AUTH_GRPC_URL=[Things service Auth GRPC URL] \
MF_THINGS_AUTH_GRPC_TIMEOUT=[Things service Auth gRPC request timeout in seconds] \
MF_THINGS_AUTH_GRPC_CLIENT_TLS=[Things service Auth gRPC TLS mode flag] \
MF_THINGS_AUTH_GRPC_CA_CERTS=[Things service Auth gRPC CA certificates] \
MF_AUTH_GRPC_URL=[Users service gRPC URL] \
MF_AUTH_GRPC_TIMEOUT=[Users service gRPC request timeout in seconds] \
MF_AUTH_GRPC_CLIENT_TLS=[Users service gRPC TLS mode flag] \
MF_AUTH_GRPC_CA_CERTS=[Users service gRPC CA certificates] \
MF_JAEGER_URL=[Jaeger server URL] \
MF_SEND_TELEMETRY=[Send telemetry to mainflux call home server] \
MF_POSTGRES_READER_INSTANCE_ID=[Postgres reader instance ID] \
$GOBIN/mainflux-postgres-reader
Usage
Starting service will start consuming normalized messages in SenML format.
Comparator Usage Guide:
| Comparator | Usage | Example |
|---|---|---|
| eq | Return values that are equal to the query | eq["active"] -> "active" |
| ge | Return values that are substrings of the query | ge["tiv"] -> "active" and "tiv" |
| gt | Return values that are substrings of the query and not equal to the query | gt["tiv"] -> "active" |
| le | Return values that are superstrings of the query | le["active"] -> "tiv" |
| lt | Return values that are superstrings of the query and not equal to the query | lt["active"] -> "active" and "tiv" |
Official docs can be found here.