# Baseline — railiance01

**Engagement:** eng-coulomb-railiance01-ho-001
**Status:** captured
**Last captured:** 2026-07-16 (observe session, T10 ramp-up)
**Access:** `ssh railiance01` (user tegwick, IdentityFile id_custodian_agent) — host_observe

## Identity

| Field | Value |
|-------|-------|
| Hostname (kernel) | 239.62.205.92.host.secureserver.net |
| Inventory name | railiance01 |
| Public IP (inventory) | 92.205.62.239 |
| Inventory ref | railiance-hosts |
| Role | Single-node k3s production (forgejo/apps, activity-core, platform services) |

## OS

| Field | Value |
|-------|-------|
| Distro | Ubuntu 24.04.3 LTS (noble) |
| Kernel | 6.8.0-87-generic #88-Ubuntu SMP PREEMPT_DYNAMIC |
| Arch | x86_64 |
| Uptime at capture | 129 days, 13:34 |
| CPU cores (nproc) | **2** |
| Memory | **3.8 GiB** total |
| Swap | **none** |
| Root FS | /dev/sda1 ext4 96G, **54% used** (52G/45G free) |

## Capture commands (non-destructive)

```bash
ssh railiance01 'hostname; uptime; uname -a; nproc; free -h; df -hT; cat /etc/os-release | head -8'
```

## Envelope seed (2026-07-16)

| Metric | Baseline | Notes |
|--------|----------|-------|
| Load 1/5/15 | ~12 / 11 / 16 | **≫ 2 cores** — overloaded |
| MemAvailable | ~0.1–0.5 GiB | severe pressure; PSI full avg60 ~24% |
| Disk / | 54% | OK for capacity; watch growth |
| /var/log | ~5.7G | journal alone ~4.1G |
| Top host processes | k3s server, gitea, temporal-server, activity-core/state-hub python | |
| k3s API | ServiceUnavailable at capture | control plane unstable under memory pressure |

## Known quirks

- Single-node production: no HA; memory headroom is the binding constraint
- DinD / Actions runner privilege model (railiance-hosts ADR-004)
- ops-bridge reverse tunnels to localhost ports (state-hub 18000/18001, etc.)
- sshd journal noise: reverse-forward port 18765 already in use (tunnel contention)
- Inventory hostname vs DNS: reverse DNS is HostEurope generic name

## Access path (RU-01)

| Method | Result |
|--------|--------|
| ICMP to inventory IP | reachable |
| `ssh railiance01` (tegwick) | **success** — non-interactive shell |
| ops-bridge tunnels to host | connected (state-hub-railiance01, issue-core-railiance01, …) |
| Privileged ops | not exercised; sudo -n available for read-only needrestart/ufw/k3s in this session |