Hi,
Today I had a small (big?) problem with the DHCP server.
When I make any changes I allways do a
# service isc-dhcp-server restart
to test the new config. In the past when there was an error in the config the
service would keep running using the previous config.
This was achieved by doing a config test before the service stop.
On my old Wheezy machine the /etc/init.d/isc-dhcp-server file has the segment(s)
[...]
test_config()
{
if ! /usr/sbin/dhcpd -t $OPTIONS -q -cf "$DHCPD_CONF" > /dev/null 2>&1;
then
echo "dhcpd self-test failed. Please fix $DHCPD_CONF."
echo "The error was: "
/usr/sbin/dhcpd -t $OPTIONS -cf "$DHCPD_CONF"
exit 1
fi
}
[...]
restart | force-reload)
test_config
$0 stop
sleep 2
$0 start
if [ "$?" != "0" ]; then
exit 1
fi
;;
Where a failed test_config will result in stopping the restart.
On my Jessie DHCP servers this safeguard no longer seems to be present.
After a typo in the config my DHCP server stopped and did not come up until I
fixed the typo and (re)started the service. Which took a while as I got
disturbed and the change was not urgent and I assumed the service was still
running :-(
Is there any way to get the old functionality back?
Bonno Bloksma
