I made a mistake, none of the networks recover from the server1 outage. Le lun. 9 oct. 2023 à 13:37, Alexandre Lessard <a...@targointernet.com> a écrit : > > Hello everyone, > > I'm new here! I'm working for an ISP as a network administrator. > Furthermore, I got about 7 years of experience doing all sort of IT > stuff for this company. I've been using and configuring Kea DHCP for > about 2 weeks now. Prior to that, I was using ISC DHCP, but since it's > now deprecated, I'm preparing two new servers to migrate all customers > on them. > > The setup: > The setup is DHCP relay with two Kea servers in HA hot-standby. There > is three particularity that I want to mention right now. > > First, because I couldn't find an out-of-the-box solution, I made a > script that replicate the configuration through the API on both server > when they are restarted. I don't think it interferes with the service > as it is run prior to the service startup, but I don't want to > overlook it either. > > Second, they both have an IP configured on their loop back interface > to be use kind of like an any cast address. That being said, I don't > use them for the HA, it's only used by the Relay agents. > > Third, they are Proxmox containers. I don't think it's problematic but > tell me if I'm wrong, I will make VMs for them. > > My problem: > When I simulated an outage by stopping the server1, only 2 (test2 and > test3) of the 4 subnets recover eventually. Even if they recover, it > takes about 5 minutes. As much as I understand, it's supposed to be > configured at 1 minute. The two other subnets never recovers. > Why some subnets never recover? > Why the 2 that recover take so long? > > I observed that the state of server2 stays to "hot-standby" even if > the remote communication is interrupted. > > I have been working on fixing that for more than 10 hours now. > Likewise, I really don't know what to look for anymore. > > The config: > The Control Agents have almost default configuration, except for the > http-host that is set to the IP interface that receive the request > (eth0). > > The Dhcp6 server is disabled. > > Has for the Dhcp4 config, it has been saved through the API, so it is > massive! All default configs have been written in the config file. For > this reason, I won't post it here if not required to avoid sending a > wall of config. I've put it on a public repository of GitHub: > https://github.com/AlexTargo/Kea-Dhcp > > If I'm missing anything, let me know, and I'll share it as soon as possible. > > I hope someone have good pointers for me. > > Regards > Alex -- ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information.
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