Query

KubeMQ Bridges Query source provides an RPC query subscriber for processing target commands.

Prerequisites

The following are required to run the query source connector:

• kubemq cluster

• kubemq-bridges deployment

Configuration

Query source 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
channel	yes	set channel to subscribe
group	no	set subscriber group
auto_reconnect	no	set auto reconnect on lost connection	"false", "true"
reconnect_interval_seconds	no	set reconnection seconds	"5"
max_reconnects	no	set how many time to reconnect	"0"

Example:

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:
      kind: source.query # Sources kind
      name: 3-clusters-source # sources name 
      connections: # Array of connections settings per each source 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: ""              
    targets:
    .....