<div dir="ltr"><div class="gmail_default" style="font-size:small">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</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">--Dan</div><div class="gmail_default" style="font-size:small"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Mar 22, 2022 at 8:28 AM Bohnenberger, Mark <<a href="mailto:mark.bohnenberger@bechtle.com">mark.bohnenberger@bechtle.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p class="MsoNormal"><span lang="EN-US">Do have configured the kea-ctrl-agent, which is responsible for the activation / communication of the RESTful service?<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Mark<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
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<p class="MsoNormal"><b>Von:</b> Kea-users <<a href="mailto:kea-users-bounces@lists.isc.org" target="_blank">kea-users-bounces@lists.isc.org</a>> <b>Im Auftrag von
</b>Dan Oachs<br>
<b>Gesendet:</b> Dienstag, 22. <span lang="EN-US">März 2022 14:08<br>
<b>An:</b> Weisteen Per <<a href="mailto:per.weisteen@telenor.no" target="_blank">per.weisteen@telenor.no</a>><br>
<b>Cc:</b> <a href="mailto:kea-users@lists.isc.org" target="_blank">kea-users@lists.isc.org</a><br>
<b>Betreff:</b> Re: [Kea-users] problems enabling HA Hot-Standby setup (OPEN)<u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span style="font-size:12pt" lang="EN-US">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).<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:12pt" lang="EN-US"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span style="font-size:12pt" lang="EN-US">If the service is listening, then perhaps there is a firewall blocking incoming traffic to port 8000?<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:12pt" lang="EN-US"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span style="font-size:12pt" lang="EN-US">--Dan<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:12pt" lang="EN-US"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US">On Tue, Mar 22, 2022 at 6:53 AM Weisteen Per <</span><a href="mailto:per.weisteen@telenor.no" target="_blank"><span lang="EN-US">per.weisteen@telenor.no</span></a><span lang="EN-US">> wrote:<u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US">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.<br>
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 ?<br>
<br>
I'm running KEA on RHEL 8 servers installed from KEA 2.0 repo using yum install. <br>
<br>
My HA config for primary server (pls ignore any missing parentheses ad this is just an extract:
<br>
<br>
"library": "/usr/lib64/kea/hooks/libdhcp_ha.so",<br>
"parameters": {<br>
"high-availability": [{<br>
"this-server-name": "tst-dhcp01",<br>
"mode": "hot-standby",<br>
"heartbeat-delay": 10000,<br>
"max-response-delay": 10000,<br>
"max-ack-delay": 5000,<br>
"max-unacked-clients": 5,<br>
"multi-threading": {<br>
"enable-multi-threading": true,<br>
"http-dedicated-listener": true,<br>
"http-listener-threads": 4,<br>
"http-client-threads": 4<br>
},<br>
"peers": [{<br>
"name": "tst-dhcp01",<br>
"url": "</span><a href="https://urldefense.com/v3/__http:/10.123.10.10:8000/__;!!J748QdifiTU!yBWK0nZy5mHL2PL9-6HyJxFlHKds79HoSewLccSsq7Jo2-Btrw22dfTb6nrGDbdjo1pyseY$" target="_blank"><span lang="EN-US">http://10.123.10.10:8000/</span></a><span lang="EN-US">",<br>
"role": "primary",<br>
"auto-failover": true<br>
},{<br>
"name": "tst-dhcp02",<br>
"url": "</span><a href="https://urldefense.com/v3/__http:/10.123.20.20:8000/__;!!J748QdifiTU!yBWK0nZy5mHL2PL9-6HyJxFlHKds79HoSewLccSsq7Jo2-Btrw22dfTb6nrGDbdjTMMBPog$" target="_blank"><span lang="EN-US">http://10.123.20.20:8000/</span></a><span lang="EN-US">",<br>
"role": "standby",<br>
"auto-failover": true<br>
}] <br>
<br>
and for standby server:<br>
<br>
"library": "/usr/lib64/kea/hooks/libdhcp_ha.so",<br>
"parameters": {<br>
"high-availability": [{<br>
"this-server-name": "tst-dhcp02",<br>
"mode": "hot-standby",<br>
"heartbeat-delay": 10000,<br>
"max-response-delay": 10000,<br>
"max-ack-delay": 5000,<br>
"max-unacked-clients": 5,<br>
"multi-threading": {<br>
"enable-multi-threading": true,<br>
"http-dedicated-listener": true,<br>
"http-listener-threads": 4,<br>
"http-client-threads": 4<br>
},<br>
"peers": [{<br>
"name": "tst-dhcp01",<br>
"url": "</span><a href="https://urldefense.com/v3/__http:/10.123.10.10:8000/__;!!J748QdifiTU!yBWK0nZy5mHL2PL9-6HyJxFlHKds79HoSewLccSsq7Jo2-Btrw22dfTb6nrGDbdjo1pyseY$" target="_blank"><span lang="EN-US">http://10.123.10.10:8000/</span></a><span lang="EN-US">",<br>
"role": "primary",<br>
"auto-failover": true<br>
},{<br>
"name": "tst-dhcp02",<br>
"url": "</span><a href="https://urldefense.com/v3/__http:/10.123.20.20:8000/__;!!J748QdifiTU!yBWK0nZy5mHL2PL9-6HyJxFlHKds79HoSewLccSsq7Jo2-Btrw22dfTb6nrGDbdjTMMBPog$" target="_blank"><span lang="EN-US">http://10.123.20.20:8000/</span></a><span lang="EN-US">",<br>
"role": "standby",<br>
"auto-failover": true<br>
}] /* peers */<br>
}] /* high-availability */<br>
}<br>
<br>
Kea-debug.log shows :<br>
<br>
HA_HEARTBEAT_COMMUNICATIONS_FAILED failed to send heartbeat to tst-dhcp02 (</span><a href="https://urldefense.com/v3/__http:/10.123.20.20:8000/__;!!J748QdifiTU!yBWK0nZy5mHL2PL9-6HyJxFlHKds79HoSewLccSsq7Jo2-Btrw22dfTb6nrGDbdjTMMBPog$" target="_blank"><span lang="EN-US">http://10.123.20.20:8000/</span></a><span lang="EN-US">):
Connection refused<br>
HA_COMMUNICATION_INTERRUPTED communication with tst-dhcp02 is interrupted<br>
<br>
And similar on the standby server but differet IP-address and name of course.<br>
<br>
./PerW<br>
<br>
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