4.1 KiB
Cassandra reader
Cassandra reader provides message repository implementation for Cassandra.
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_CASSANDRA_READER_PORT | Service HTTP port | 8180 |
| MF_CASSANDRA_READER_DB_CLUSTER | Cassandra cluster comma separated addresses | 127.0.0.1 |
| MF_CASSANDRA_READER_DB_USER | Cassandra DB username | |
| MF_CASSANDRA_READER_DB_PASS | Cassandra DB password | |
| MF_CASSANDRA_READER_DB_KEYSPACE | Cassandra keyspace name | messages |
| MF_CASSANDRA_READER_DB_PORT | Cassandra DB port | 9042 |
| MF_CASSANDRA_READER_CLIENT_TLS | Flag that indicates if TLS should be turned on | false |
| MF_CASSANDRA_READER_CA_CERTS | Path to trusted CAs in PEM format | |
| MF_CASSANDRA_READER_SERVER_CERT | Path to server certificate in pem format | |
| MF_CASSANDRA_READER_SERVER_KEY | Path to server key in pem format | |
| MF_JAEGER_URL | Jaeger server URL | localhost:6831 |
| MF_THINGS_AUTH_GRPC_URL | Things service Auth gRPC URL | localhost:8183 |
| MF_THINGS_AUTH_GRPC_TIMEOUT | Things service Auth gRPC request timeout in seconds | 1 |
| MF_AUTH_GRPC_URL | Auth service gRPC URL | localhost:8181 |
| MF_AUTH_GRPC_TIMEOUT | Auth service gRPC request timeout in seconds | 1s |
Deployment
The service itself is distributed as Docker container. Check the cassandra-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 cassandra
make cassandra-reader
# copy binary to bin
make install
# Set the environment variables and run the service
MF_CASSANDRA_READER_PORT=[Service HTTP port] \
MF_CASSANDRA_READER_DB_CLUSTER=[Cassandra cluster comma separated addresses] \
MF_CASSANDRA_READER_DB_KEYSPACE=[Cassandra keyspace name] \
MF_CASSANDRA_READER_DB_USER=[Cassandra DB username] \
MF_CASSANDRA_READER_DB_PASS=[Cassandra DB password] \
MF_CASSANDRA_READER_DB_PORT=[Cassandra DB port] \
MF_CASSANDRA_READER_CLIENT_TLS=[Flag that indicates if TLS should be turned on] \
MF_CASSANDRA_READER_CA_CERTS=[Path to trusted CAs in PEM format] \
MF_CASSANDRA_READER_SERVER_CERT=[Path to server pem certificate file] \
MF_CASSANDRA_READER_SERVER_KEY=[Path to server pem key file] \
MF_JAEGER_URL=[Jaeger server URL] \
MF_THINGS_AUTH_GRPC_URL=[Things service Auth gRPC URL] \
MF_THINGS_AUTH_GRPC_TIMEOUT=[Things service Auth gRPC request timeout in seconds] \
$GOBIN/mainflux-cassandra-reader
Using docker-compose
This service can be deployed using docker containers. Docker compose file is
available in <project_root>/docker/addons/cassandra-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/addons/cassandra-writer/init.sh
docker-compose -f docker/addons/casandra-reader/docker-compose.yml up -d
Usage
Service exposes HTTP API for fetching messages.