Mcollective Concepts

[kaustubh chaudhari]

Hi All,

Hey All!

I am trying to understand how Mcollective actually works.

Say my master is a mcollective server! and i am running commands from the same server itself.

i know that mcollective is a broadcast request to all the nodes in the network.

Question is on what port  this broadcast request is heard! i know mcollective listen on 6163.

In the firewall related documentation its mentioned that only incoming request should be allowed to 6163 on the master server. However when we are running mco command request is going out!! Thats means its incomming request for all the nodes too!! is that right ?

this was confusing to me!! If some one can help me understand this better it would be great!!!

i need to open the ports and proper direction on the firewall!


Cheerzzz
-Kaustubh

[Cristian Falcas]

Hi,

Mco is connecting to the activemq server. port 61613 without ssl,
61614 with ssl.

The master server? This will be the machine where you have activemq.
And yes, you will need only incoming requests on that port to be
enabled.

Mco client will also connect only to activemq and put commands on the
queue. Mco servers listen on the queue and if they see something for
them will start to do the work.


Best regards,
Cristian Falcas

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[Dick Davies]

The agents on your servers are connected to a pub/sub system (stomp usually).

that's the port you're referring to.

the commands get sent into that pub/sub system , agents do stuff and send back replies

using the same pub/sub setup. you pull the replies off that. 

there's no direct connection between the 'console' (system running mco commands) and your

agents.

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