On 04/28/2015 11:58 AM, Innes, Duncan wrote:
The A part of IPA has always been of great interest to me. Our current IPA infrastructure works well at the I & P parts, giving us great failover abilities and connectivity through hardware firewalls without punching too many holes. Whilst the A part may not be solely about centralised logging, it's the thing I've been looking into recently. To do this I've built a setup around the ELK stack using a pair of Logstash servers and an ElasticSearch cluster of 5 servers (overkill on the ES side perhaps, but this is proof of concept still). To expand on this, I've been looking at running the Logstash serviceon each of our IPA servers as that gives us a failover pair in each part of our network. The Logstash servers then connect to the ES cluster as non-data nodes. Each client has an rsyslog7 (still using RHEL6 at the moment) config that writes sends the logs in JSON format with some extra bespoke fields added (such as Project, Environment, and Use to help us search better). The sending is done in rsyslog's rather clunky failover method to the local pair of Logstash servers (with a third failover being to /dev/null).
I think  I am in alignment with what you are saying.

I like rsyslogd as the basic "ship the log off the server" tool. Let's use what the platform support first natively and formost; We want something native, not Ruby, not even Python if we can avoid it, for the normal case. Bumping up to logstash for more complex host-side rules might be fine. Remember, the Hosts side of integration with FreeIPA is sssd.

Logstash can be the server side of the audit collection as well, and then it puts fewer demands on the server.

We need to ensure that the audit data can be sent over a GSSAPI protected pathway.

On the IPA side, I would think we would register the audit server as a host, and have specific service entires for the protocols supported.

Would you see IPA owning the audit server, or just integrating in with an existing one?

I don't think the IPA server itself should be the ELK server for obvious reasons. I would love to see the ELK server supported along the lines of how we do a replica setup.

It struck me that this kind of setup might not be too far removed from some of the A part of IPA. I'm not good at ASCII flowchart diagrams, so will leave it there for now. The main point of this - does any of this idea sound reasonable to add in to FreeIPA? To me it sounds like a good fit for getting (some) logging data back to a central point. The Logstash indexers currently have a very low load (perhaps due to the incoming data already being JSON) and small memory footprint. They run without issue on our IPA servers. The ES nodes are different and I won't pretent to be any sort of expert in what they do. They load up a bit when I shut 1 of them down, but that's the rebalancing happening.
Apologies if this is off topic, or wide of the mark.
Duncan Innes

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