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From: | Guolin Cheng |
Subject: | How to restart daemons on redhat|fedora?? |
Date: | Fri, 2 Jul 2004 11:48:59 -0700 |
Hi, all, Got a silly question on how to restart daemons using “/etc/init.d/<service>
restart” through cfengine… The question can be detailed as: After a new
configuration is ready and pushed out to clients by means of cfengine, how to
setup cfengine to restart daemons through “/etc/init.d/<serviceDaemonScript>
restart|reload” shell commands. The existing “restart <shell
command>” substatement in processes section doesn’t help a lot since
it requires the matched processes should die hard first according to manual. The
following are cut from references: ….. restart "shell command" Note the syntax: there is no equals
sign here. If the keyword `restart' appears, then the next quoted string is
interpreted as a shell command which is to be executed after any signals have
been sent. This command is only issued if the number of processes matching the
specified regular _expression_ is zero, or if the signal sent was signal 9
(sigkill) or 15 (sigterm) , i.e. the normal termination signals. This could be
used to restart a daemon for instance. … ….. For my case, I’d like to restart samba daemons, smbd
and nmbd, after I push out a new /etc/samba/smb.conf. My configuration file is something
like the following: control: actionsequence = ( copy processes … ) …. AddInstallable = ( new_samba_config ) …. copy: # /etc/samba/smb.conf linux.webdevServers::
$(master_cfconfigs)/webdevServers/etc/samba/smb.conf
dest=/etc/samba/smb.conf
mode=644
owner=root
group=root
type=checksum
server=$(policyhost)
define=new_samba_config …. processes: new_samba_config:: "smbd" signal=hup restart
"/etc/init.d/smb reload" …. But I’m afraid the above configuration will not
restart my samba daemons at all, since I give the smbd process a “sighup”
siginal instead of “sigkill” or “sigterm”. Should I use the following statement instead? I hesitate to
do that since it is a dirty hack ( I have to read the /etc/init.d/smb script
and figure out that two daemons are fired up there). …. processes: new_samba_config:: "smbd" signal=kill “nmbd” signal=kill restart
"/bin/rm –rf /var/run/smbd.pid /var/run/nmbd.pid; /etc/init.d/smb restart" …. Any suggestions and opinions are greatly appreciated. Thanks. --Guolin Cheng |
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