[Kea-users] problems enabling HA Hot-Standby setup (OPEN)
Dan Oachs
doachs at gac.edu
Tue Mar 22 13:31:55 UTC 2022
Good point. I think the default for the kea-ctrl-agent is to use port
8000. In that case you should change the kea control agent to use a
different port such as 8001 since you can't have both trying to use the
same port. If you have not already, look at /etc/kea/kea-ctrl-agent.conf
--Dan
On Tue, Mar 22, 2022 at 8:28 AM Bohnenberger, Mark <
mark.bohnenberger at bechtle.com> wrote:
> Do have configured the kea-ctrl-agent, which is responsible for the
> activation / communication of the RESTful service?
>
>
>
> Mark
>
>
>
>
>
> *Von:* Kea-users <kea-users-bounces at lists.isc.org> *Im Auftrag von *Dan
> Oachs
> *Gesendet:* Dienstag, 22. März 2022 14:08
> *An:* Weisteen Per <per.weisteen at telenor.no>
> *Cc:* kea-users at lists.isc.org
> *Betreff:* Re: [Kea-users] problems enabling HA Hot-Standby setup (OPEN)
>
>
>
> That looks very similar to my setup which is working. Are you sure the
> kea service is not listening on port 8000? One way to check would be with
> "lsof -i -P| grep kea-dhcp" and look for a line showing the hostname:8000
> (LISTEN).
>
>
>
> If the service is listening, then perhaps there is a firewall blocking
> incoming traffic to port 8000?
>
>
>
> --Dan
>
>
>
>
>
> On Tue, Mar 22, 2022 at 6:53 AM Weisteen Per <per.weisteen at telenor.no>
> wrote:
>
> Hi, I've set up a HA Hot-Standby config according to docs but I can't
> figure out why the servers doesn't listen on port 8000.
> I thought that was the port configured for heartbeat. I'm a little
> confused and would be very happy if someone could explain how this is
> supposed to work ?
>
> I'm running KEA on RHEL 8 servers installed from KEA 2.0 repo using yum
> install.
>
> My HA config for primary server (pls ignore any missing parentheses ad
> this is just an extract:
>
> "library": "/usr/lib64/kea/hooks/libdhcp_ha.so",
> "parameters": {
> "high-availability": [{
> "this-server-name": "tst-dhcp01",
> "mode": "hot-standby",
> "heartbeat-delay": 10000,
> "max-response-delay": 10000,
> "max-ack-delay": 5000,
> "max-unacked-clients": 5,
> "multi-threading": {
> "enable-multi-threading": true,
> "http-dedicated-listener": true,
> "http-listener-threads": 4,
> "http-client-threads": 4
> },
> "peers": [{
> "name": "tst-dhcp01",
> "url": "http://10.123.10.10:8000/
> <https://urldefense.com/v3/__http:/10.123.10.10:8000/__;!!J748QdifiTU!yBWK0nZy5mHL2PL9-6HyJxFlHKds79HoSewLccSsq7Jo2-Btrw22dfTb6nrGDbdjo1pyseY$>
> ",
> "role": "primary",
> "auto-failover": true
> },{
> "name": "tst-dhcp02",
> "url": "http://10.123.20.20:8000/
> <https://urldefense.com/v3/__http:/10.123.20.20:8000/__;!!J748QdifiTU!yBWK0nZy5mHL2PL9-6HyJxFlHKds79HoSewLccSsq7Jo2-Btrw22dfTb6nrGDbdjTMMBPog$>
> ",
> "role": "standby",
> "auto-failover": true
> }]
>
> and for standby server:
>
> "library": "/usr/lib64/kea/hooks/libdhcp_ha.so",
> "parameters": {
> "high-availability": [{
> "this-server-name": "tst-dhcp02",
> "mode": "hot-standby",
> "heartbeat-delay": 10000,
> "max-response-delay": 10000,
> "max-ack-delay": 5000,
> "max-unacked-clients": 5,
> "multi-threading": {
> "enable-multi-threading": true,
> "http-dedicated-listener": true,
> "http-listener-threads": 4,
> "http-client-threads": 4
> },
> "peers": [{
> "name": "tst-dhcp01",
> "url": "http://10.123.10.10:8000/
> <https://urldefense.com/v3/__http:/10.123.10.10:8000/__;!!J748QdifiTU!yBWK0nZy5mHL2PL9-6HyJxFlHKds79HoSewLccSsq7Jo2-Btrw22dfTb6nrGDbdjo1pyseY$>
> ",
> "role": "primary",
> "auto-failover": true
> },{
> "name": "tst-dhcp02",
> "url": "http://10.123.20.20:8000/
> <https://urldefense.com/v3/__http:/10.123.20.20:8000/__;!!J748QdifiTU!yBWK0nZy5mHL2PL9-6HyJxFlHKds79HoSewLccSsq7Jo2-Btrw22dfTb6nrGDbdjTMMBPog$>
> ",
> "role": "standby",
> "auto-failover": true
> }] /* peers */
> }] /* high-availability */
> }
>
> Kea-debug.log shows :
>
> HA_HEARTBEAT_COMMUNICATIONS_FAILED failed to send heartbeat to tst-dhcp02 (
> http://10.123.20.20:8000/
> <https://urldefense.com/v3/__http:/10.123.20.20:8000/__;!!J748QdifiTU!yBWK0nZy5mHL2PL9-6HyJxFlHKds79HoSewLccSsq7Jo2-Btrw22dfTb6nrGDbdjTMMBPog$>):
> Connection refused
> HA_COMMUNICATION_INTERRUPTED communication with tst-dhcp02 is interrupted
>
> And similar on the standby server but differet IP-address and name of
> course.
>
> ./PerW
>
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