Opscenter cannot listen to public IP

(2 posts) (2 voices)

• Started 6 months ago by txie
• Latest reply from thobbs
• This topic is not a support question

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1. 

   txie
   Member

   I set up a multi-DC cassandra nodes in HP Cloud. I have 4 nodes in AZ2, 4 nodes in AZ3, and set up a opscenter in AZ2. As one thread says, the interface in /etc/opscenter/opscenterd.conf should be reachable by other nodes, since I have nodes in another DC (AZ3), I set the public IP. I saw the error in opscenter.log. Apparently, it's not a successful bind.

   twisted.internet.error.CannotListenError: Couldn't listen on 15.185.178.188:8888: [Errno 99] Cannot assign requested address.

   I also tried private IP. No agents on cassandra nodes are able to talk to it, even in the same DC. opscenter shows 0 of 8 agents found. I tried to install agents from opscenter, no luck either.

   Posted 6 months ago #
2. 

   thobbs
   Administrator

   You will need to use the bindable (private) IP in opscenterd.conf and configure each agent to try to contact the public IP address. To do that, on each node, edit address.yaml (located at /var/lib/opscenter-agent/conf/address.yaml if installed through the OpsCenter UI or from a package) and set the following:

   stomp_interface: <opscenterd_public_ip>

   where <opscenter_public_ip> is the public IP address.

   I'm assuming your agents will also need to bind to a private IP address and have opscenterd contact them at a public IP address. To do that, add the following to address.yaml:

   agent_rpc_interface: <private_ip_address>
agent_rpc_broadcast_address: <public_ip_address>

   Hopefully that helps! Let me know if you hit any problems.

   Posted 6 months ago #

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