Got it, Jerome, thanks for letting me know the background here. You can link promises using if_repaired -- so if snmpd.conf changes, use if_repaired to set a class; another promise can fire off a command (starting snmpd) if that class is set.
Aleksey On Wed, Sep 21, 2011 at 8:52 AM, Jerome Yanga <jya...@esri.com> wrote: > Thank you, Aleksey. I will try this and provide an update. > > The reason why I would like to create such a configuration change is so that > I can make sure that servers that are not being monitored via SNMP are at > least configured to be monitored so that the next SNMP discovery will pick up > the servers that do not have its SNMP configured and started. What I didn't > include in my previous email is that I perform a copy of snmpd.conf into > servers that may not have it. This is the case for starting the process as > well as making sure that it will start again when the server is rebooted. > > In the case of the restart, I would like the process to restart when > snmpd.conf changes. > > jerome > > -----Original Message----- > From: Aleksey Tsalolikhin [mailto:atsaloli.t...@gmail.com] > Sent: Tuesday, September 20, 2011 11:08 PM > To: Jerome Yanga > Cc: help-cfengine@cfengine.org > Subject: Re: CFEngine Help: how to start a service and make sure it runs > after a reboot > > On Fri, Sep 16, 2011 at 4:44 PM, Jerome Yanga <jya...@esri.com> wrote: >> Hi! >> >> I am trying to replicate the following commands in a promise. I have tried >> the restart_class but I cannot seem to get it working the way I have >> described below. >> >> service snmpd start/restart >> chkconfig snmpd on >> >> I want it to restart snmpd if it is already running and start it if it is >> stopped. > > Why, please? (I want to understand the use case.) > > > Ok, so you want to: > > Check if the process is running, and based on that set a class PROCESS_RUNNING > > if PROCESS_RUNNING, then restart it > > if not PROCESS_RUNNING, then start it > > Right? > > Try this on for size (tested with sendmail daemon, it does work): > > bundle agent example > > { > processes: > > ".*" > > process_count => anyprocs, > process_select => proc_finder; > > > commands: > > process_running:: > > "/bin/echo restart command"; > > process_not_running:: > "/bin/echo start command"; > > } > > ######################################################## > > body process_select proc_finder > > { > > command => "sendmail: .*"; # (Anchored) regular expression matching > the command/cmd field of a process > > process_result => "command"; > > } > > ######################################################## > > body process_count anyprocs > > { > match_range => "0,0"; # Integer range for acceptable number of matches > for this process > > > out_of_range_define => { "process_running" }; # List of classes to > define if the matches are out of range > > in_range_define => { "process_not_running" }; # List of classes to > define if the matches are in range. > > > } > > _______________________________________________ Help-cfengine mailing list Help-cfengine@cfengine.org https://cfengine.org/mailman/listinfo/help-cfengine
