5.2 KiB
5.2 KiB
MongoDB reader
MongoDB reader provides message repository implementation for MongoDB.
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_MONGO_READER_LOG_LEVEL | Service log level | info |
| MF_MONGO_READER_HTTP_HOST | Service HTTP host | localhost |
| MF_MONGO_READER_HTTP_PORT | Service HTTP port | 9007 |
| MF_MONGO_READER_HTTP_SERVER_CERT | Service HTTP server cert | "" |
| MF_MONGO_READER_HTTP_SERVER_KEY | Service HTTP server key | "" |
| MF_MONGO_NAME | MongoDB database name | messages |
| MF_MONGO_HOST | MongoDB database host | localhost |
| MF_MONGO_PORT | MongoDB database port | 27017 |
| MF_THINGS_AUTH_GRPC_URL | Things service Auth gRPC URL | localhost:7000 |
| MF_THINGS_AUTH_GRPC_TIMEOUT | Things service Auth gRPC request timeout in seconds | 1s |
| MF_THINGS_AUTH_GRPC_CLIENT_TLS | Flag that indicates if TLS should be turned on | false |
| MF_THINGS_AUTH_GRPC_CA_CERTS | Path to trusted CAs in PEM format | "" |
| 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 | Flag that indicates if TLS should be turned on | false |
| MF_AUTH_GRPC_CA_CERT | Path to trusted CAs in PEM format | "" |
| MF_JAEGER_URL | Jaeger server URL | http://jaeger:14268/api/traces |
| MF_SEND_TELEMETRY | Send telemetry to mainflux call home server | true |
| MF_MONGO_READER_INSTANCE_ID | Service instance ID | "" |
Deployment
The service itself is distributed as Docker container. Check the mongodb-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 mongodb reader
make mongodb-reader
# copy binary to bin
make install
# Set the environment variables and run the service
MF_MONGO_READER_LOG_LEVEL=[Service log level] \
MF_MONGO_READER_HTTP_HOST=[Service HTTP host] \
MF_MONGO_READER_HTTP_PORT=[Service HTTP port] \
MF_MONGO_READER_HTTP_SERVER_CERT=[Path to server pem certificate file] \
MF_MONGO_READER_HTTP_SERVER_KEY=[Path to server pem key file] \
MF_MONGO_NAME=[MongoDB database name] \
MF_MONGO_HOST=[MongoDB database host] \
MF_MONGO_PORT=[MongoDB database port] \
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=[Flag that indicates if TLS should be turned on] \
MF_THINGS_AUTH_GRPC_CA_CERTS=[Path to trusted CAs in PEM format] \
MF_AUTH_GRPC_URL=[Users service gRPC URL] \
MF_AUTH_GRPC_TIMEOUT=[Users service gRPC request timeout in seconds] \
MF_AUTH_GRPC_CLIENT_TLS=[Flag that indicates if TLS should be turned on] \
MF_AUTH_GRPC_CA_CERT=[Path to trusted CAs in PEM format] \
MF_JAEGER_URL=[Jaeger server URL] \
MF_SEND_TELEMETRY=[Send telemetry to mainflux call home server] \
MF_MONGO_READER_INSTANCE_ID=[Service instance ID] \
$GOBIN/mainflux-mongodb-reader
Using docker-compose
This service can be deployed using docker containers. Docker compose file is
available in <project_root>/docker/addons/mongodb-reader/docker-compose.yml.
In order to run all Mainflux core services, as well as mentioned optional ones,
execute following command:
docker-compose -f docker/docker-compose.yml up -d
docker-compose -f docker/addons/mongodb-reader/docker-compose.yml up -d
Usage
Service exposes HTTP API for fetching messages.
Note: MongoDB Reader doesn't support searching substrings from string_value, due to inefficient searching as the current data model is not suitable for this type of queries.