Not sure is it an issue. Agent itself is working.
Welcome to Ubuntu 24.04.3 LTS (GNU/Linux 6.14.0-37-generic x86_64)
systemctl status xen-guest-agent
● xen-guest-agent.service - Xen guest agent
Loaded: loaded (/usr/lib/systemd/system/xen-guest-agent.service; enabled; preset: enabled)
Active: active (running) since Mon 2026-02-09 14:28:41 MSK; 36min ago
Main PID: 959 (xen-guest-agent)
Tasks: 17 (limit: 19041)
Memory: 4.8M (peak: 6.7M)
CPU: 76ms
CGroup: /system.slice/xen-guest-agent.service
└─959 /usr/sbin/xen-guest-agent
Feb 09 14:28:41 oris systemd[1]: Started xen-guest-agent.service - Xen guest agent.
Feb 09 14:28:41 oris xen-guest-agent[959]: cannot parse yet os version Custom("24.04")
Welcome to Ubuntu 24.04.3 LTS (GNU/Linux 6.17.0-14-generic x86_64)
systemctl status xen-guest-agent
● xen-guest-agent.service - Xen guest agent
Loaded: loaded (/usr/lib/systemd/system/xen-guest-agent.service; enabled; preset: enabled)
Active: active (running) since Mon 2026-02-09 15:04:31 MSK; 1s ago
Main PID: 9058 (xen-guest-agent)
Tasks: 17 (limit: 76999)
Memory: 2.5M (peak: 4.7M)
CPU: 32ms
CGroup: /system.slice/xen-guest-agent.service
└─9058 /usr/sbin/xen-guest-agent
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240