On 02/25/2018 07:18 PM, Hal Murray via devel wrote:
Is there a HOWTO that tells me how to set things up?
I'll get to work on that.
There may be two targets for that document. One is SNMP wizards who don't
know much about ntpd. The other is NTP wizards who don't know much about
SNMP.
Unfortunately I am neither. I know the intersection of the two, and some
of the basics needed to get SNMP running.
"Why SNMP?" I'm not sure I can tell you much more that a few minutes of
quality time with a wiki could.
There is a lot of stuff out there. A few good URLs would help people like me
get started. I think "curated" is the right term.
These are decent. Unfortunately proper documentation about SNMP is not
exactly commonplace; early on I had to reverse engineer more than I'd
like by poking the master agent and seeing what it did.
https://en.wikipedia.org/wiki/Simple_Network_Management_Protocol
https://www.thegeekstuff.com/2012/09/snmp-introduction/
http://www.net-snmp.org/wiki/index.php/TUT:snmpd_configuration
I assume I also have to setup a system to collect the data and show status or
email alerts or whatever. What do you call that? I think there are several
packages available. Do they all support NTP? Do they monitor NTP servers
directly with NTP packets?
I... am not sure what you are talking about.
Rough structure of an SNMP system:
SNMP daemon (like snmpd): Master agent. Everything routes through this,
and it handles the permissions.
Sub-agent daemon (ntpsnmpd): responds to commands and data requests
relayed to it by the master.
Clients: Includes utilities like snmpwalk/get/set, as well as more
sophisticated software. Talks to the master agent to send or retrieve
data, and does something with that data.
Management Information Base (MIB): Document specifying the structure and
meaning of a subset of the data tree. Usually the client will have a
copy of this so that it knows what to look for.
At any rate, I/we need the HOWTO level info for setting up the NTP side and I
need a HOWTO for getting the collection end off the ground.
(In case it's not obvious, I don't mean you have to write them. Links to
existing info is fine.)
--------
In case it's not on your list...
ntpd can monitor other ntp servers. Just put "noselect" on a server line
pointed at the system you want to monitor. Then ntpq -p will give you a line
of info and logging to peerstats and rawstats will get the normal data.
--
/"In the end; what separates a Man, from a Slave? Money? Power? No. A
Man Chooses, a Slave Obeys."/ -- Andrew Ryan
/"Utopia cannot precede the Utopian. It will exist the moment we are fit
to occupy it."/ -- Sophia Lamb
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