OS & Kernel

Operating System

PropertyValue
DistributionUbuntu 20.04.6 LTS (Focal Fossa)
Kernel5.15.0-139-generic
Architecturex86_64
Uptime37 days
System StateDEGRADED

Kernel Details

The system runs kernel 5.15, the HWE (Hardware Enablement) kernel for Ubuntu 20.04. This is a long-term support kernel with backported hardware support.

$ uname -a
Linux megatron 5.15.0-139-generic #149~20.04.1-Ubuntu SMP x86_64 GNU/Linux

Key kernel features in use:

  • cgroups v2 -- Used by K3s for container resource isolation
  • NVIDIA kernel modules -- GPU passthrough to containers and bare-metal workloads
  • NVMe support -- Primary storage driver
  • CIFS/SMB -- Network filesystem for the 88T share
  • NFS -- Network filesystem (currently degraded, host unreachable)
  • WireGuard -- Used by Tailscale for mesh networking

Uptime & Load

MetricValue
Uptime37 days
Load (1m / 5m / 15m)20.07 / 18.45 / 17.86

The load averages are stable across all three windows, indicating a consistent baseline workload. With 128 logical threads, this represents roughly 16% sustained utilization.

Systemd Service Summary

The system is in a DEGRADED state due to failed non-critical services.

Failed Services

ServiceStatusImpact
motd-news.serviceFailedNone -- message of the day fetching
wol-enable.serviceFailedNone -- Wake-on-LAN setup

Key Running Services

ServiceDescription
k3s.serviceK3s Kubernetes server (control plane)
sshd.serviceOpenSSH server (port 22)
sshd-rescue.serviceRescue SSH daemon (port 2222, high priority)
cloudflared.serviceCloudflare tunnel daemon
tailscaled.serviceTailscale VPN daemon
docker.serviceDocker daemon for non-K3s containers
containerd.serviceContainer runtime (K3s)
nvidia-persistenced.serviceNVIDIA GPU persistence daemon
smbd.serviceSamba file sharing
ufw.serviceUncomplicated Firewall

Service Counts (Approximate)

StateCount
Running150+
Exited (one-shot, OK)80+
Failed2
Total loaded300+

Timezone & Locale

PropertyValue
TimezoneUS Eastern (EST/EDT)
Localeen_US.UTF-8

Notable Configuration

  • Rescue SSH runs on port 2222 with Nice -20 priority and OOM protection, ensuring emergency access even under extreme load. See Rescue SSH.
  • Forgejo SSH runs on port 2223 for Git operations.
  • The system has been running for 37 days without reboot, accumulating 21 GiB of swap usage despite ample free RAM.

Upgrade Considerations

Ubuntu 20.04 LTS reaches end of standard support in April 2025 (extended security maintenance available through 2030). Consider planning an upgrade to Ubuntu 22.04 LTS or 24.04 LTS during a maintenance window.