Proxmox Tailscale LXC regression w/kernel 7
Just throwing it out there as a friendly heads up for anyone opting into the 7.0 kernel upgrade.
I run a really simple setup (some services in a Proxmox virtual LAN, mostly LXCs). I run Tailscale inside some of the LXCs to get easy access on my tailnet.
No issues at all until I updated to the 7.0 kernel — then tailscale performance tanked to unusable levels. Nodes were connected directly (they hadn’t gone to DERP or anything).
The only fix was to pin the last 6.x kernel I was running (6.17-something I think) and reboot. Tailscale performance immediately returned to normal.
Just a heads up to anyone with a similar setup.