# Query

KubeMQ Bridges Query target provides an RPC query sender for processing sources requests.

## Prerequisites

The following are required to run the query target connector:

* kubemq cluster
* kubemq-bridges deployment

## Configuration

Query target connector configuration properties:

| Properties Key   | Required | Description                                      | Example                                              |
| ---------------- | -------- | ------------------------------------------------ | ---------------------------------------------------- |
| address          | yes      | kubemq server address (gRPC interface)           | kubemq-cluster-a-grpc.kubemq.svc.cluster.local:50000 |
| client\_id       | no       | set client id                                    | "client\_id"                                         |
| auth\_token      | no       | set authentication token                         | JWT token                                            |
| default\_channel | no       | set default channel to send request              |                                                      |
| timeout\_seconds | no       | sets query request default timeout (600 seconds) |                                                      |

Example:

```yaml
bindings:
  - name:  query-binding 
    properties: 
      log_level: error
      retry_attempts: 3
      retry_delay_milliseconds: 1000
      retry_max_jitter_milliseconds: 100
      retry_delay_type: "back-off"
      rate_per_second: 100
    sources:
    .....
    targets:
      kind: target.query # Sources kind
      name: 3-clusters-targets # targets name 
      connections: # Array of connections settings per each target kind
        - address: "kubemq-cluster-a-grpc.kubemq.svc.cluster.local:50000"
          client_id: "cluster-a-query-connection"
          auth_token: ""
          channel: "query"
          group: ""
        - address: "kubemq-cluster-b-grpc.kubemq.svc.cluster.local:50000"
          client_id: "cluster-b-query-connection"
          auth_token: ""
          channel: "query"
          group: ""
        - address: "kubemq-cluster-c-grpc.kubemq.svc.cluster.local:50000"
          client_id: "cluster-c-query-connection"
          auth_token: ""
          channel: "query"
          group: ""
```