Good news, today we migrated our mcollective installation from ActiveMQ to
NATS. There are the usual handful of straggler hosts but various departments
have tickets. I will switch my client back to activemq and check on the
leftovers in a few days (clustered activemq brokers still running precisely for
It turned out that the security department was quite accomodating about adding
$HOME/.puppetlabs to the "keep" list. They send frequent auditing queries
around and are getting faster, more consistent replies so they're happier now.
("All good for me too, after switching to it, I see speed improvements and
better reliability.") I see the same thing, queries where I would have had to
extend the timeout with ActiveMQ are handled within my client's configured
"--dt 5 -t 5" with NATS.
Finally, I will be able to turn off a few hosts. We're now handling 1900
mcollective servers on a single unclustered NATS daemon where before we needed
four clustered ActiveMQ daemons (I agree that my own ActiveMQ skill was a
likely factor here). The NATS daemon is using less cpu and ram than any single
ActiveMQ daemon was.
Now let's see how NATS handles its first DDOS or inter-datacenter connection
downtime! Will follow up if I notice anything bad.
On Thu, Oct 06, 2016 at 08:02:37PM +0100, R.I.Pienaar wrote:
> ----- Original Message -----
> > From: "Christopher Wood" <christopher_w...@pobox.com>
> > To: "mcollective-users" <firstname.lastname@example.org>
> > Sent: Thursday, 6 October, 2016 20:29:16
> > Subject: Re: [mcollective-users] translate activemq subcollectives to
> > nats.io
> > On Thu, Oct 06, 2016 at 08:43:54AM +0100, R.I.Pienaar wrote:
> >> ----- Original Message -----
> >> > From: "Christopher Wood" <christopher_w...@pobox.com>
> >> > To: "mcollective-users" <email@example.com>
> >> > Sent: Wednesday, 5 October, 2016 22:19:50
> >> > Subject: Re: [mcollective-users] translate activemq subcollectives to
> >> > nats.io
> >> > Subcollectives indeed work fine. So far I have things running on a
> >> > single host
> >> > and the setup was much easier than doing something similar with activemq
> >> > several years ago. Everything I could think to try works the same.
> >> >
> >> > Next to fully puppetize the setup and persuade the security department
> >> > to open
> >> > another port for nats (oh dear).
> >> Did you use the module the wiki recommend? It's simple but does what you
> >> want
> >> including
> >> clustering
> >> > Mild nitpick: there doesn't seem to be a client config file option for
> >> > cert and
> >> > key. I know there are environment variable options but enough people will
> >> > forget to set those on every login (environment with no persistent
> >> > .bash_profile or similar, yes indeed). My workaround will be to provide
> >> > a short
> >> > puppet manifest to reshape their client config since any shuffling
> >> > errors will
> >> > be obvious when mailed back. It would definitely be easier to have
> >> > people copy
> >> > activemq cert params into choria cert params.
> >> why do you wish to change these paths? It defaults to the same ones puppet
> >> use
> >> for a reason - you should not need to make any client configuration at
> >> all, just
> >> put the certs in the puppet location - which 'mco choria request_cert'
> >> does for
> >> you
> > If I were setting things up from scratch in regular home directories the
> > choria
> > technique would be suitable, but I'm not.
> > I have the usual corporate things going on:
> > 1) The new cert location is not in "$HOME/.mcollective.d". It took a great
> > deal
> > of protracted discussion with the security department to permit .mcollective
> > and .mcollective.d (certs and things) to persist overnight in users' home
> > directories. Most every other file under $HOME on the authorized mco client
> > hosts get removed nightly. I will be re-opening that discussion.
> OK, well adding configurable overrides for these would not be hard, I dont
> adding more flags, feel free to open a issue in the choria github
> > 2) Everybody has their own (working) certs and configs from the current
> > production install. It was like pulling teeth the first time to get people
> > set
> > up despite the detailed instructions; what is straightforward and obvious
> > to me
> > is not so obvious to others. That includes running a cert management command
> > based on my experience here.
> reusing those would be hard right? There were never a CA involved in making
> the new stuff does CA validation
> > NB: This is of course a policy issue not an mcollective issue, I myself
> > wouldn't
> > go and add this functionality based on the description of the issues.
> > Policies
> > have results and working around them in a corporate environment rarely ends
> > well.
> no its fair enough, this stuff matters and mcollective is one of few in this
> with solid AAA story because I want it to appeal to exactly this kind of
> user, so
> if overrides will help I will add them
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