Add scope without service restart, possible?

Patrick Trapp ptrapp at nex-tech.com
Fri May 22 21:44:15 UTC 2020


I can second that. We run a pair of servers plus a staging server. We make changes and test the code on the staging server. If it passes, we sync to a git server. We run a script that causes the production servers to pull the new config from git and restart, one at a time.
________________________________
From: dhcp-users <dhcp-users-bounces at lists.isc.org> on behalf of Steve van der Burg <Steve.vanderBurg at lhsc.on.ca>
Sent: Friday, May 22, 2020 2:30 PM
To: Users of ISC DHCP <dhcp-users at lists.isc.org>
Subject: RE: Add scope without service restart, possible?

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I run a pair of servers with all leases (~40k active right now, out of ~370k defined) in failover pools and routinely change the configs and restart with no interruption to service, as Simon just indicated.

I push new configs to both servers and then the servers test them and, if they pass, restart on alternate minutes (primary on even minutes, for example, and secondary on odd minutes).

...Steve

-----Original Message-----
From: dhcp-users <dhcp-users-bounces at lists.isc.org> On Behalf Of Simon Hobson
Sent: Friday,May 22,2020 3:22 PM
To: Users of ISC DHCP <dhcp-users at lists.isc.org>
Subject: Re: Add scope without service restart, possible?

CAUTION: This email originated from outside the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe.

Cayab, Jefrey E. <jcayab at gmail.com> wrote:

> Wanted to check if it's possible to add new DHCP scope to a running DHCPd service and to take effect without restart the service? Is there a reload equivalent that can take in the updated config?

Not with the ISC server. However, a restart should be very quick for any reasonable configuration - and if you use dual servers with failover, then no interruption in service to end devices.

Simon

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