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Auto-detect root password from IOM hostname on serial login

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The BMC serial number (e.g. MXE3000048LHA03C) is embedded in the IOM
hostname shown in the serial login prompt. It also doubles as the root
password, so no manual entry is needed.

- If at login prompt: extract serial from 'hostname login:' line
- If already logged in: run 'hostname' on the shell and extract serial
- Falls back to prompt_password() if extraction fails either way

_login_serial_console() now returns (success, password) instead of bool.
Callers in workflow_serial.py and workflow_check.py updated accordingly.
CLAUDE.md updated to document the behaviour and remove it from planned features.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
scott
2026-04-16 10:23:13 -04:00
parent 67cbee7897
commit 4c820c5086
3 changed files with 71 additions and 22 deletions
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7
CLAUDE.md
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@@ -76,15 +76,16 @@ The `docs/` directory contains reference documentation for this project. Check a
A single PATCH combining both fields fails due to a known ES24N firmware bug. Documented in `_apply_iom()` in `workflow_serial.py`.
**Authentication:**
- Serial loopback (`127.0.0.1`): username `root`
- Network IP: username `Admin`
- Serial loopback (`127.0.0.1`): username `root`, password auto-detected from hostname
- Network IP: username `Admin`, password prompted from user
**Redfish API paths:**
- Network config: `/redfish/v1/Managers/{IOM1|IOM2}/EthernetInterfaces/1`
- Firmware update: `/redfish/v1/UpdateService`
- Fabric card: `/redfish/v1/Chassis/{IOM1|IOM2}/NetworkAdapters/1`
**Serial password auto-detection:** The IOM BMC serial number is embedded in the hostname shown on the serial login prompt (e.g. `ves-ves-vds2249r-MXE3000048LHA03C-mgr1 login:`). The `MXE...` segment is the root password. `_login_serial_console()` extracts it automatically — from the login prompt hostname if a login is needed, or by running `hostname` on the shell if already logged in. Falls back to `prompt_password()` if extraction fails.
## Planned Features
- Network-based IOM network configuration (`workflow_network.py`) — same config workflow as serial but connecting via the IOM's existing IP address using `Admin` credentials, for cases where the IOM is already reachable on the network
- Auto-detect password from serial login prompt — the IOM BMC serial number (e.g. `MXE3000043CHA007`) appears to be embedded in the login prompt hostname; if confirmed on a live system, this could allow `_login_serial_console()` to skip the manual password prompt