On 26. 04. 22 19:47, Bob Harold wrote:
On Tue, Apr 26, 2022 at 11:36 AM Leroy Tennison via bind-users
<bind-users@lists.isc.org <mailto:bind-users@lists.isc.org>> wrote:
I am working on shutting down a site which has an isc-bind server
that is master for a domain and subnet which will exist elsewhere
once the site is closed. The few remaining systems don't warrant
such a server. My goal is to merge what remains of the
domain/subnet into an existing server which is master for other
domains/subnets. My current thinking is to:
freeze changes on the server being retired (fortunately DHCP's DDNS
won't be an issue by that point)
shut down that server
take the data files (forward and reverse zone with associated
journal files) and place them on the remaining server
make sure the data file types are consistent
change the the remaining server's type from slave to master for the
zones in question
restart the remaining server
Is this a good plan? If not, how should I proceed?
Anything I'm missing?
Thanks in advance for your input.
--
Sounds good to me. If you use "rndc freeze", then you should not need
to copy the journal files. If there are any other secondary servers
(and you almost always want more than just the master), then change
those to pull from the new server, and make sure that is working, before
starting the steps you listed.
It's almost but incomplete - first step is missing.
The very first step should be removing references to to-be-removed
server from NS set **in the parent zone** and also in the zone files you
control, and also clearing up glue records in the parent.
Then wait for (max TTL + propagation delay) computed over all RR sets
modified **in parent and child**, and only _then_ you can shutdown the
old server.
Pro tip: You can lower the TTLs before so it you do not need to wait
that long when the shutdown event is due.
Commands:
$ rndc sync -clean
$ rndc stop
... might be a good idea as well, I think.
--
Petr Špaček
--
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