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dhcpd 4.4 named ddns and additional event triggers

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Rick Dicaire

dhcpd 4.4 named ddns and additional event triggers

Hi folks, I'm using dhcp 4.4.1 with named ddns updating.

I'm researching performing additional triggers using event interface.

Older man pages state I cannot configure event statements if I'm using

internal ddns mechanism, however the man page for 4.4.1 just gives a terse description of events, and makes no mention whatsoever of whether event statements can be used in conjunction

with internal ddns mechanism:

REFERENCE: EVENTS
There are three kinds of events that can happen regarding a lease, and it is possible to declare statements that occur when any of these events happen. These events are the commit event, when the server has made a commitment of a certain lease to a client, the release event, when the client has released the server from its commitment, and the expiry event, when the commitment expires.

To declare a set of statements to execute when an event happens, you must use the on state-ment, followed by the name of the event, followed by a series of statements to execute when the event happens, enclosed in braces.

Is it now possible to configure event declarations and still use internal ddns updating?

Thanks

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Bill Shirley-2

Re: dhcpd 4.4 named ddns and additional event triggers

I've been using "on commit" along with DNS updating for years:
on commit { log ( info, concat ( "Host:", pick-first-value(option fqdn.hostname, option host-name, "(none)"), "=>", pick-first-value(config-option server.ddns-hostname, "(none)") ," VendorId:", pick-first-value(option vendor-class-identifier, "(none)")... ) );}
What is it that you want to do?

Bill

On 7/10/2020 3:15 PM, Rick Dicaire wrote:

Hi folks, I'm using dhcp 4.4.1 with named ddns updating.
I'm researching performing additional triggers using event interface.

Older man pages state I cannot configure event statements if I'm using

internal ddns mechanism, however the man page for 4.4.1 just gives a terse description of events, and makes no mention whatsoever of whether event statements can be used in conjunction

with internal ddns mechanism:

REFERENCE: EVENTS
There are three kinds of events that can happen regarding a lease, and it is possible to declare statements that occur when any of these events happen. These events are the commit event, when the server has made a commitment of a certain lease to a client, the release event, when the client has released the server from its commitment, and the expiry event, when the commitment expires.

To declare a set of statements to execute when an event happens, you must use the on state-ment, followed by the name of the event, followed by a series of statements to execute when the event happens, enclosed in braces.

Is it now possible to configure event declarations and still use internal ddns updating?

Thanks
_______________________________________________
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Rick Dicaire

Re: dhcpd 4.4 named ddns and additional event triggers

Bill, thanks for responding.

I'm looking to update netbox via REST api with dhcp client IPs/hostnames.

I expect to exec a script on each event type that will pass the IP and hostname data to netbox for updating.

My concern was configuring event actions would stop dhcpd from also updating named via dhcpd's internal

updating mechanism.

On Fri, Jul 10, 2020 at 11:53 PM Bill Shirley <[hidden email]> wrote:

I've been using "on commit" along with DNS updating for years:
on commit { log ( info, concat ( "Host:", pick-first-value(option fqdn.hostname, option host-name, "(none)"), "=>", pick-first-value(config-option server.ddns-hostname, "(none)") ," VendorId:", pick-first-value(option vendor-class-identifier, "(none)")... ) );}
What is it that you want to do?

Bill

On 7/10/2020 3:15 PM, Rick Dicaire wrote:
Hi folks, I'm using dhcp 4.4.1 with named ddns updating.
I'm researching performing additional triggers using event interface.

Older man pages state I cannot configure event statements if I'm using

internal ddns mechanism, however the man page for 4.4.1 just gives a terse description of events, and makes no mention whatsoever of whether event statements can be used in conjunction

with internal ddns mechanism:

REFERENCE: EVENTS
There are three kinds of events that can happen regarding a lease, and it is possible to declare statements that occur when any of these events happen. These events are the commit event, when the server has made a commitment of a certain lease to a client, the release event, when the client has released the server from its commitment, and the expiry event, when the commitment expires.

To declare a set of statements to execute when an event happens, you must use the on state-ment, followed by the name of the event, followed by a series of statements to execute when the event happens, enclosed in braces.

Is it now possible to configure event declarations and still use internal ddns updating?

Thanks
_______________________________________________
ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information.

dhcp-users mailing list
[hidden email]
https://lists.isc.org/mailman/listinfo/dhcp-users
_______________________________________________
ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information.

dhcp-users mailing list
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https://lists.isc.org/mailman/listinfo/dhcp-users