Delay startup of services in rc.conf || elswhere

[RW]

On Tue, 18 Nov 2008 12:05:33 +0100
bsd <bsd at todoo.biz> wrote:

> Hello,
> 
> 
> I have a server configured to start 10 services at startup (in /etc/ 
> rc.conf)
> 
> Unfortunately, the startup of MySQL seems to be returning "ok"
> before It actually has started completely the program___ the next
> program rely on MySQL and does not start well because the database is
> not "fully" started.
> 
> I would like to introduce something like a "sleep 10" timer in the  
> service startup process___

The cleanest solution is to create a minimal rc script that will sort
between the mysql and the affected services, and just give it a start
command that pauses for 10 seconds. 

I do a similar thing where I poll for network access before allowing
anything that relies on it to start.



#!/bin/sh
#
# PROVIDE: networkwait
# REQUIRE: named
# BEFORE:  ntpdate

. /etc/rc.subr

networkwait_enable=${networkwait_enable:-"NO"}
name="networkwait"
rcvar=`set_rcvar`
stop_cmd=":"
start_cmd="networkwait_start"                                                   


networkwait_start(){
   if [ "$networkwait_ping_hosts" ] ; then
      host_list="${networkwait_ping_hosts}"
   else
      # No hosts supplied - use external nameservers
      host_list=`awk '/^ *nameserver/ {print $2}
        '< /etc/resolv.conf | grep -E -v '^127\.0+\.0+\.0*1'`
   fi
   echo -n "Waiting for network access ... "
   while true ; do
      for inet_host in $host_list ; do
         if ping -nc1  $inet_host 2>&1 > /dev/null ; then
            echo "ping to ${inet_host} succeeded."
            # Re-Sync ipfilter and pf in case
            # they had failed DNS lookups
            /etc/rc.d/ipfilter resync
            /etc/rc.d/pf resync
            exit 0
         fi
      done
      sleep 5
   done
}

load_rc_config ${name}
run_rc_command "$1"