System -> Uptime / Boot Time read psutil.boot_time(), which on shared-kernel
containers (Docker, LXC, Proxmox containers) is /proc/stat:btime - the host
kernel's boot time, not the container's. Reporter on Proxmox LXC saw the
Proxmox node's uptime instead of the Bambuddy container's.
PID 1 is the container's entrypoint (or the host init on bare metal), and
its create_time is the POSIX wall-clock timestamp of when it started.
Switching to psutil.Process(1).create_time() reports the right value on
containers and matches host boot within a sub-second on bare metal.
Defensive fallback to psutil.boot_time() on psutil.Error / OSError so the
endpoint still returns 200 with the best-available answer if /proc/1/stat
is unreadable (locked-down container, custom seccomp policy).
maziggy
58d1b1eb74