For what it's worth we created an ACS-specific MIB (beneath the org.apache MIB) so really this is just a matter of defining and publishing it.
But lets think about monit being used to restart services - with HA, Redundant VR, are we sure that we want to inject yet another point of control into things? Is it better to just respawn an instance since they are essentially stateless? I don't know, but management server, local daemons, and other SysVMs making decisions seems like we are increasing complexity. --David On Thu, Sep 26, 2013 at 10:31 AM, Chiradeep Vittal <chiradeep.vit...@citrix.com> wrote: > In this case you would have to invent another enterprise MIB. Not too > hard, but I'd argue that it needs to be proxied through some other service > anyway and it represents a different integration point with ACS. Depends > on whether you consider the system vm part of the ACS deployment, or an > entity like a host. > > On 9/26/13 10:27 AM, "Alex Huang" <alex.hu...@citrix.com> wrote: > >>Using SNMP for alert notification is not a bad idea though. I don't see >>why we can't do that instead of posting to the management server. This >>is specifically referring to the second part of the proposal. Why >>reinvent that part of it? >> >>--Alex >> >>> -----Original Message----- >>> From: Chiradeep Vittal [mailto:chiradeep.vit...@citrix.com] >>> Sent: Wednesday, September 25, 2013 10:28 PM >>> To: dev@cloudstack.apache.org >>> Subject: Re: [PROPOSAL] Service monitoring tool in virtual router >>> >>> SNMP wouldn't restart a failed process nor would it generate alerts. It >>>is >>> simply too generic for the requirements outlined here. The proposal does >>> not talk about modifying monit, just using it. That wouldn't trigger >>>the AGPL. >>> I think the idea is to have a tight monitoring loop that scales: so >>>executing the >>> monitoring loop in-situ makes sense. >>> >>> >>> On 9/25/13 9:53 PM, "David Nalley" <da...@gnsa.us> wrote: >>> >>> >On Wed, Sep 25, 2013 at 9:30 AM, Jayapal Reddy Uradi >>> ><jayapalreddy.ur...@citrix.com> wrote: >>> >> Hi, >>> >> >>> >> Currently in virtual router there is no way to recover and notify if >>> >>some service goes down unexpectedly. >>> >> >>> >> This feature is about monitoring all the services rendered by the >>> >>virtual router, ensure that the services are running through the life >>> >>time of the VR. >>> >> >>> >> On service failure: >>> >> 1. Generate an alert and event indicating failure 2. Restart the >>> >> service >>> >> >>> >> Services to be monitored: >>> >> DHCP, DNS, haproxy, password server etc. >>> >> >>> >> As part of monitoring there are two activities >>> >> >>> >> 1. One is monitoring the services in VR and log the events. Using >>> >>monit for monitoring services 2. Second part is pushing alerts from >>> >>router to MS server. Thinking on POST the logs to web server in MS. >>> >> >>> >> I will be updating more details and FS in this thread. >>> >> >>> >> I created enhancement bug for this. >>> >> https://issues.apache.org/jira/browse/CLOUDSTACK-4736 >>> >> >>> >> Thanks, >>> >> Jayapal >>> > >>> >So several things - why not make this via SNMP? Query processes, and >>> >many other things. This should be relatively simple, is well known, can >>> >be locked down (or could be monitored for many other things by external >>> >monitoring packages) and is the defacto standard for monitoring hosts. >>> >Second - monit is Affero GPL licensed - which is a cat-x license. >>> >While I expect that we would merely use this and not do any hacking on >>> >it - I think its inclusion might be a surprise (and forbidden in many >>> >environments) to our users >>> > >>> >--David >> >
