[Kea-users] Monitoring a Kea cluster

[Dan Oachs]

I have noticed something similar with our Kea servers.

Running Kea 2.0.3 on Rocky Linux 8.7

After a server reboot dhcpv6 is running but not handing out leases.   There
is some issue with the way things start up and the firewall blocking
packets.  My current workaround is to add a few lines in /etc/rc.local to
stop ip6tables, restart kea-dhcp6, then start ip6tables.

I'm sure there is a correct way to fix this, but the workaround is
functional for me at the moment.

--Dan


On Tue, Jan 3, 2023 at 2:20 AM Stefan G. Weichinger <lists at xunil.at> wrote:

> Am 27.12.22 um 12:46 schrieb Darren Ankney:
>
> > In any case, I’d be concerned why it was running but not answering
> > requests more-so than I would be about how to monitor it using actual
> > DHCP.  I vaguely remember having some trouble with Kea and systemd
> > startup ordering (ie: it started up before the server’s IP was on the
> > interface).  Setting After=network.target took care of it.
>
> We saw the behavior again yesterday: no DHCP leases after a reboot until
> we restarted kea.
>
> In the service file there are these lines:
>
> Wants=network-online.target
> After=network-online.target
> After=time-sync.target
>
> https://systemd.io/NETWORK_ONLINE/ gives some information about these
> targets ... "network-online.target" should fit better .. but doesn't
> seem to be enough.
>
> We use raw sockets for kea, but the server listens on multiple
> vlan-interfaces:
>
> {
>          "Dhcp4": {
>                  "interfaces-config": {
>                          "interfaces": [ "enp0s31f6", "enp0s31f6.101",
> "enp0s31f6.102", "enp0s31f6.103", "enp0s31f6.200" ],
>                          "dhcp-socket-type": "raw"
>                  },
>
>
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