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Richard Frith-Macdonald 2020-07-20 13:16:30 +01:00
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10
EcAlarm.h
View file

@ -5,7 +5,7 @@
Written by: Richard Frith-Macdonald <rfm@gnu.org>
Date: Febrary 2010
Originally developed from 1996 to 2012 by Brainstorm, and donated to
Originally developed from 1996 to 2020 by Brainstorm, and donated to
the FSF.
This file is part of the GNUstep project.
@ -333,6 +333,14 @@ EcMakeManagedObject(NSString *host, NSString *process, NSString *component);
* responsible for ensuring that alarms for the same issue are updated
* to contain the first event date, notification ID and a trend indicator.
* </p>
* <p>Alarms which have been raised (by passing them to an alarm destination)
* remain raised until they are cleared (by passign a matching alarm with
* a cleared severity status) to the destination. Alarm clears sent with
* no earlier matching raise are generally ignored, but a clear may be
* flagged as a special audit alarm: one which is passed on and logged
* for audit porposes. This is a rare situation where the alarm does not
* actually represent a problem (or even the suspicion of a problem).
* </p>
*/
@interface EcAlarm : NSObject <NSCoding,NSCopying>
{

44
README
View file

@ -24,18 +24,32 @@ look there to diagnose problems.
~xxx/Data/Command/AlertConfig.plist before the Control server will start.
There are examples in the same directory as this README
The Control server reads the configuration information and acts as a central
point to which Command servers running on different hosts will connect (in
order to obtain configuration and in order to report problems to a central
point). The Control server is also contacted by Console processes, which
provide a command line to control the operation of the system as a whole.
The Control server acts as an alarm destination for the entire system and
interfaces to SNMP. It also provides email alerting facilities according
to alert rules defined in AlertConfig.plist
The Command server handles launching and shutting down of processes and
monitoring their state. When a process starts up it registers itself with
the Command server, and when it shuts down it unregisters itself.
A process is considered stable if it starts up, registers itself, and then
responds to the 'pings' that the Command server sends to it at intervals.
A process has to be working for long enough to respond to at least three of
the periodic pings before it is considered stable.
A process has to be working and registered with the Command server for some
time before it is considered stable.
In connection with this process management, the server will raise and clear
some alarms.
These alarms are all created with the 'processingError' event type
and the 'softwareProgramError' probable cause.
and the 'softwareProgramError' probable cause. The alarms will have managed
object values consisting of the host the server is running on, the process
name 'Command', an empty instance value, and a component value consisting
of the full name of the process (process name and instance) to which they
apply.
The individual specific problems are:
Launch failed
@ -46,7 +60,7 @@ Launch failed
(eg if the program crashes immediately), or at the end of the permitted
time (eg the program fails to connect to and register itself with the
Command server).
This alarm shoudl be cleared automatically once the process launches or if
This alarm should be cleared automatically once the process launches or if
the process is told to quit from the Console.
Process hung
@ -64,3 +78,25 @@ Process lost
If the process is started again (and becomes stable), the alarm should
automatically be cleared.
Started (audit information)
An audit alarm clear, generated whenever a process launch completes, as an
informational message. The additional text part says why the process started:
autolaunch
Console launch command
Console restart command
started externally
remote API request
Stopped (audit information)
An audit alarm clear, generated whenever a process shutdown completes, as an
informational message. The additional text part says why the process stopped:
process disabled in config
Console quit command
Console restart command
quit all instruction
stopped externally
stopped (process lost)
stopped (died with signal X)