Add Restart IOM option to main menu (option 4)

New workflow_restart.py supports restarting IOM1 or IOM2 via:
- Network: prompts for password, IP, and IOM, sends GracefulRestart
- Serial: detects device, logs in, prompts for IOM, sends curl restart

Exit shifted from option 4 to option 5.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -32,6 +32,7 @@ modules/
     workflow_serial.py      ← Serial-based IOM network configuration workflow
     workflow_firmware.py    ← IOM and Fabric Card firmware update workflow
     workflow_check.py       ← Read-only system check (network settings + firmware versions)
+    workflow_restart.py     ← Restart IOM via network or serial
 ```
 
 `es24n_conf.py` adds `modules/` to `sys.path` at startup so all inter-module imports work without a package structure.

es24n_conf.py

@@ -24,6 +24,7 @@ sys.path.insert(0, os.path.join(os.path.dirname(os.path.abspath(__file__)), "mod
 from ui import _c, C, banner, draw_box, ok, warn, prompt
 from workflow_check import system_check_workflow
 from workflow_firmware import firmware_update_workflow
+from workflow_restart import restart_iom_workflow
 from workflow_serial import configure_shelf
 
 
@@ -34,11 +35,12 @@ def main():
             f"  {_c(C.BOLD, '1')}  Configure Network Settings",
             f"  {_c(C.BOLD, '2')}  Update IOM / Fabric Card Firmware",
             f"  {_c(C.BOLD, '3')}  Query Current Configuration",
-            f"  {_c(C.BOLD, '4')}  Exit",
+            f"  {_c(C.BOLD, '4')}  Restart IOM",
+            f"  {_c(C.BOLD, '5')}  Exit",
         ])
         print()
 
-        choice = prompt("Select [1/2/3/4]")
+        choice = prompt("Select [1-5]")
         if choice == "1":
             another = True
             while another:
@@ -48,9 +50,11 @@ def main():
         elif choice == "3":
             system_check_workflow()
         elif choice == "4":
+            restart_iom_workflow()
+        elif choice == "5":
             break
         else:
-            warn("Please enter 1, 2, 3, or 4.")
+            warn("Please enter 1, 2, 3, 4, or 5.")
             time.sleep(1)
 
     print()

modules/workflow_restart.py

@@ -0,0 +1,150 @@
+"""
+workflow_restart.py — Restart IOM workflow.
+Sends a GracefulRestart to a selected IOM via either a direct network
+Redfish connection or a serial console curl command.
+"""
+
+import time
+
+from redfish import _redfish_restart_iom
+from workflow_serial import (
+    detect_serial_device,
+    open_serial_connection,
+    _login_serial_console,
+    _serial_redfish_request,
+)
+from ui import (
+    _c, C,
+    banner, rule,
+    info, ok, warn, error,
+    prompt, prompt_ip, prompt_password, prompt_yn,
+)
+
+
+def _iom_prompt() -> str:
+    """Ask which IOM to target and return 'IOM1' or 'IOM2'."""
+    print()
+    print("  Which IOM would you like to restart?")
+    print(f"    {_c(C.BOLD, '1')}  IOM1")
+    print(f"    {_c(C.BOLD, '2')}  IOM2")
+    print()
+    while True:
+        choice = prompt("Select [1/2]")
+        if choice in ("1", "2"):
+            break
+        warn("Please enter 1 or 2.")
+    return "IOM1" if choice == "1" else "IOM2"
+
+
+# ── Network restart ────────────────────────────────────────────────────────────
+
+def _restart_via_network():
+    banner()
+    rule("Restart IOM -- Network Connection")
+
+    print()
+    password = prompt_password()
+    print()
+    ip  = prompt_ip("  IOM IP address (either IOM1 or IOM2)")
+    iom = _iom_prompt()
+
+    print()
+    if not prompt_yn(f"Restart {iom} at {ip}?", default=False):
+        info("Restart cancelled.")
+        print()
+        prompt("Press Enter to return to main menu")
+        return
+
+    info(f"Sending restart command to {iom}...")
+    ok_flag, data = _redfish_restart_iom(password, ip, iom)
+    if ok_flag:
+        ok(f"{iom} restart initiated.")
+        info("The IOM will be temporarily unreachable while rebooting.")
+    else:
+        error(f"Restart failed: {data}")
+
+    print()
+    prompt("Press Enter to return to main menu")
+
+
+# ── Serial restart ─────────────────────────────────────────────────────────────
+
+def _restart_via_serial():
+    banner()
+    rule("Restart IOM -- Serial Connection")
+
+    device = detect_serial_device()
+    if not device:
+        error("Could not detect a serial device. Returning to main menu.")
+        time.sleep(2)
+        return
+
+    ser = open_serial_connection(device)
+    if not ser:
+        error("Could not open serial port. Returning to main menu.")
+        time.sleep(2)
+        return
+
+    print()
+    logged_in, password = _login_serial_console(ser)
+    if not logged_in:
+        error("Could not log in to IOM console. Returning to main menu.")
+        if ser.is_open:
+            ser.close()
+        time.sleep(2)
+        return
+
+    iom = _iom_prompt()
+
+    print()
+    if not prompt_yn(f"Restart {iom} via serial?", default=False):
+        info("Restart cancelled.")
+        if ser.is_open:
+            ser.close()
+        print()
+        prompt("Press Enter to return to main menu")
+        return
+
+    info(f"Sending restart command to {iom}...")
+    ok_flag, data = _serial_redfish_request(
+        ser, password, "POST",
+        f"/redfish/v1/Managers/{iom}/Actions/Manager.Reset",
+        {"ResetType": "GracefulRestart"},
+    )
+    if ok_flag:
+        ok(f"{iom} restart initiated.")
+        info("The IOM will be temporarily unreachable while rebooting.")
+    else:
+        error(f"Restart failed: {data}")
+
+    if ser.is_open:
+        ser.close()
+        ok(f"Serial port {device} closed.")
+
+    print()
+    prompt("Press Enter to return to main menu")
+
+
+# ── Top-level entry point ──────────────────────────────────────────────────────
+
+def restart_iom_workflow():
+    banner()
+    rule("Restart IOM")
+
+    print("  How do you want to connect to the IOM?")
+    print()
+    print(f"    {_c(C.BOLD, '1')}  Network connection")
+    print(f"    {_c(C.BOLD, '2')}  Serial connection")
+    print(f"    {_c(C.BOLD, '3')}  Cancel")
+    print()
+
+    while True:
+        choice = prompt("Select [1/2/3]")
+        if choice in ("1", "2", "3"):
+            break
+        warn("Please enter 1, 2, or 3.")
+
+    if choice == "1":
+        _restart_via_network()
+    elif choice == "2":
+        _restart_via_serial()