can dhcpd keep working when encountering a syntax error

[Pat Dery]

Hi

is it possible to configure dhcpd to keep working when the dhcpd.conf
contains a syntax error

for example if someone enters the mac address : aa:bb:cc:dd:ee:gg by mistake

at reload the whole service stops and can't restart until someone corrects
the error

we would like it if it would continue serving ip and reporting the error in
the log file

maybe a major warning in the log instead of stopping , something like that

thanks



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[Philippe Maechler]

we use the -t option (syntax check) to check if the conf file looks ok and if so, then we restart the service. if the syntax is not ok, we report the error by mail

the downside to this is, that the daemon reports the copyright notice and an unexpirienced worker tought, that there is a problem because the service was so often restarted. we did adjust the logging and now everything works fine

hth

philippe

Pat Dery <[hidden email]> schrieb am Mi., 2. Sept. 2020, 17:25:

Hi

is it possible to configure dhcpd to keep working when the dhcpd.conf
contains a syntax error

for example if someone enters the mac address : aa:bb:cc:dd:ee:gg by mistake

at reload the whole service stops and can't restart until someone corrects
the error

we would like it if it would continue serving ip and reporting the error in
the log file

maybe a major warning in the log instead of stopping , something like that

thanks



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[Bruce Hudson]

On Wed, Sep 02, 2020 at 10:24:48AM -0500, Pat Dery wrote:
 
> is it possible to configure dhcpd to keep working when the dhcpd.conf
> contains a syntax error

    The usual way to do this would be to create a script for restarting
the DHCP server. Then, before restarting the server, use the "-t" option
to test the configuration file. If the test fails, exit and leave the
old version running.
 
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ITS, Networks and Systems |
Dalhousie University |
Halifax, Nova Scotia, Canada | [phone]
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[Pat Dery]

good idea

thanks

pat



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