javascalacassandramesospheredcos

Get the service IPs ports running under mesospehere dcos through program or command

I want to connect to Cassandra which is running as a service in Mesosphere DC/OS. Is there any programmatic way(any api exposed) to get the Cassandra port and ip details ?

From Command I can connect like below... same thing I want to do it programmatically may be with REST api... or Java client to connect to these services.

As per this doc https://github.com/mesosphere/dcos-cassandra-service/blob/master/docs/connecting-clients.md 

$ dcos cassandra --name=<service-name> connection

{
  "address": [
    "10.0.0.47:9042",
    "10.0.0.50:9042",
    "10.0.0.49:9042"
  ],
  "dns": [
     "node-0.cassandra.mesos:9042",
     "node-1.cassandra.mesos:9042",
     "node-2.cassandra.mesos:9042"
  ]
}

Note : The reason for doing this is every time cassandra IP and port changing. I have to manually adjust in my property file to get the latest details. If its through program its very easy to set the property with out manual interaction.

Solution

  • If you use the entries from the DNS section (shown below) they would not change even if the task relocated to another node 

     "node-0.cassandra.mesos:9042",
 "node-1.cassandra.mesos:9042",
 "node-2.cassandra.mesos:9042"