maas hooks/triggers for dns (de-)registration

[Patrizio Bassi]

Hi All,

i got no replies so i took a look into the code.
When an IP address/hostname is added in a zone file in bind by MAAS i see
provisioningserver/dns/actions.py calls bind_reload() which issues a
execute_rndc_command() [defined in in provisioningserver/dns/config.py]

it would be nice to source a custom script to forward the event (i.e.
reload/reconfig).
Do you think it's possibile to implement in maas 2.2

Patrizio


2017-03-17 12:49 GMT+01:00 Patrizio Bassi <patrizio.bassi at gmail.com>:

> Hi All,
>
> I'm on maas 2.1.3 using it for a juju openstack deploy.
>
> I have an external dns providing name resolution for bare metal machines
> and everything works fine.
> Basically we have a subnet 10.10.xxx.xxx/16 allocated where first
> addresses are statically registered in the dns server, while the others are
> "assigned" (meaning, without any hostname association) to maas so it can
> dynamically use them.
>
> I could not deploy the openstack-telemetry charm because
> Mar 13 08:13:41 juju-45a437-0-lxd-0 aodh-api[20910]: Traceback (most
> recent call last):
> Mar 13 08:13:41 juju-45a437-0-lxd-0 aodh-api[20910]:   File
> "/usr/bin/aodh-api", line 14, in <module>
> Mar 13 08:13:41 juju-45a437-0-lxd-0 aodh-api[20910]:     my_ip =
> socket.gethostbyname(socket.gethostname())
> Mar 13 08:13:41 juju-45a437-0-lxd-0 aodh-api[20910]: socket.gaierror:
> [Errno -2] Name or service not known
>
> infact the LXD containers allocated by juju don't have a dns entry. Beside
> the need to fix the juju charm somehow it spots a problem: how to register
> a container ip/hostname in a upstream dns.
>
> It looks something similar to https://lists.ubuntu.com/archi
> ves/maas-devel/2017-February/002381.html
>
> Question is: can maas trigger a custom script (actually a remote rest api
> curl) when a machine or a container is created (event of new dns entry) and
> when it gets destroyed (so we can unregister the hostname?).
>
> I was looking at DHCP Snippets but i'm not sure it's the most proper way
> (actually should be a bind trigger).
>
> Patrizio
>
>
>
>
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