# CI System Runbook

Triage guide for the local CI/CD system. Each entry: symptom → triage commands → fix → escalation.

---

## 1. Runner offline in Gitea UI

**Symptom**: `http://10.10.20.11:3100/admin/runners` shows `local-windows-runner` as offline.
Queued jobs stay pending indefinitely.

**Triage**:
```powershell
# Check service state
Get-Service act_runner

# Last 50 lines of runner log
Get-Content 'F:\CI\act_runner\logs\act_runner.log' -Tail 50

# Check registration file is intact
Test-Path 'F:\CI\act_runner\.runner'
```

**Fix**:
```powershell
# Restart the service
Restart-Service act_runner

# Verify it came back online (wait ~10s then check Gitea UI)
Get-Service act_runner | Select-Object Status, StartType

# If service won't start, check NSSM log
& 'C:\nssm\nssm.exe' status act_runner
```

If the `.runner` registration file is missing or corrupt, re-register:
```powershell
cd F:\CI\act_runner
.\act_runner.exe register --no-interactive `
    --instance http://10.10.20.11:3100 `
    --token <token-from-gitea-admin> `
    --name local-windows-runner `
    --labels "windows-build:host,dotnet:host,msbuild:host"
```

**Escalation**: If the runner restarts but goes offline again within minutes, check Event Viewer → Application for `act_runner` errors and inspect `F:\CI\act_runner\logs\`.

---

## 2. All builds fail in Phase 2 (VM clone / start)

**Symptom**: `Invoke-CIJob.ps1` fails at Phase 2 with errors like:
- `vmrun clone failed`
- `vmrun start failed`
- `Template VMX not found`
- `Could not detect VM IP address`

**Triage**:
```powershell
# List all running VMs
& 'C:\Program Files (x86)\VMware\VMware Workstation\vmrun.exe' -T ws list

# Check template VMX exists and is accessible
Test-Path 'F:\CI\Templates\WinBuild2025\WinBuild2025.vmx'

# Check for orphaned clones that may be consuming disk
Get-ChildItem 'F:\CI\BuildVMs\' -Directory | Select-Object Name, LastWriteTime

# Check disk free space
Get-PSDrive F | Select-Object Name, Free, Used

# Check for a stuck vm-start lock from a crashed job
Test-Path 'F:\CI\State\vm-start.lock'
```

**Fix** — by root cause:

*Template VMX missing/moved*: check `GITEA_CI_TEMPLATE_PATH` in `F:\CI\act_runner\config.yaml`.

*Parent VMDK locked* (VMware left a lock file after host crash):
```powershell
# Stop all VMs
& vmrun.exe -T ws stop 'F:\CI\Templates\WinBuild2025\WinBuild2025.vmx' hard
# Delete lock files
Remove-Item 'F:\CI\Templates\WinBuild2025\*.lck' -Recurse -Force -ErrorAction SilentlyContinue
```

*Snapshot missing* (`BaseClean` was deleted or renamed):
```powershell
# List snapshots on template VM
& vmrun.exe -T ws listSnapshots 'F:\CI\Templates\WinBuild2025\WinBuild2025.vmx'
# Update GITEA_CI_SNAPSHOT_NAME in config.yaml to match the available snapshot name
```

*Disk full* (clone delta files need space):
```powershell
# Emergency cleanup — remove all orphaned clones
& 'N:\Code\Workspace\Local-CI-CD-System\scripts\Cleanup-OrphanedBuildVMs.ps1' -MaxAgeHours 0
# Then run retention
& 'N:\Code\Workspace\Local-CI-CD-System\scripts\Invoke-RetentionPolicy.ps1' -AggressiveRetentionDays 3
```

*Stale vm-start lock* (from a job that crashed without cleanup):
```powershell
Remove-Item 'F:\CI\State\vm-start.lock' -Force
Remove-Item 'F:\CI\State\ip-leases\*.lease' -Force
```

**Escalation**: If `vmrun clone` fails with exit code -1 even after clearing locks and confirming disk space, re-open VMware Workstation UI and check the template VM is intact and the snapshot is listed.

---

## 3. Builds are slow

**Symptom**: jobs that previously completed in ~3 min now take 8+ min.
Phase durations visible in `F:\CI\Logs\<jobId>\invoke-ci.jsonl`.

**Triage**:
```powershell
# Check disk free space (below 50 GB = fragmented writes)
Get-PSDrive F | Select-Object @{n='FreeGB';e={[math]::Round($_.Free/1GB,1)}}

# Check active VM CPU usage (Task Manager or:)
Get-Process vmware-vmx | Select-Object CPU, WorkingSet | Sort-Object CPU -Descending

# Check VMnet8 NAT adapter status
Get-NetAdapter | Where-Object { $_.Name -like 'VMware*' }

# Parse JSONL for per-phase durations (requires jq or manual inspection)
# Each phase has a 'start' and 'success' event — diff the 'ts' fields.
Get-Content 'F:\CI\Logs\<jobId>\invoke-ci.jsonl' | ConvertFrom-Json | Format-Table ts,phase,status
```

**Fix** — by root cause:

*Low disk space → fragmented VMDKs*: run retention policy, then consider `vmware-vdiskmanager -d` to defragment the template VMDK.

*High vmware-vmx CPU with many VMs*: reduce `capacity` in `config.yaml` from 4 to 2.

*VMnet8 NAT bottleneck* (slow pip/nuget downloads inside VM): check `Services.msc` → `VMware NAT Service` is running.

*NVMe saturation*: if the host NVMe is at 100% I/O (Task Manager → Performance → Disk), all four concurrent VMs are competing. Reduce `capacity: 2`.

**Escalation**: Use `invoke-ci.jsonl` to identify which phase is slow across multiple jobs. Phase 1 slow = host git or network. Phase 2-3b slow = disk I/O. Phase 5 slow = build itself (not a CI infra problem).

---

## 4. Template VMX corrupt after host crash

**Symptom**: After an unclean host shutdown, `vmrun clone` or `vmrun start` on the template fails. VMware Workstation shows the template in an error state.

**Triage**:
```powershell
# Try starting the template directly in VMware Workstation UI
# If it reports "configuration file error" or "disk lock", proceed below.

# Check for lock files
Get-ChildItem 'F:\CI\Templates\WinBuild2025\' -Recurse -Filter '*.lck'

# Check if backup exists
Get-ChildItem 'F:\CI\Backups\' -Directory | Sort-Object LastWriteTime -Descending | Select-Object -First 5
```

**Fix**:

*Lock files only* (common after hard shutdown):
```powershell
# Ensure no VMware processes are running
Get-Process vmware*, vmrun -ErrorAction SilentlyContinue | Stop-Process -Force
# Remove locks
Remove-Item 'F:\CI\Templates\WinBuild2025\*.lck' -Recurse -Force
# Test clone
& vmrun.exe -T ws listSnapshots 'F:\CI\Templates\WinBuild2025\WinBuild2025.vmx'
```

*VMX or VMDK truly corrupt — restore from backup*:
```powershell
# Stop all CI activity first
Stop-Service act_runner

# Identify latest backup
$latest = Get-ChildItem 'F:\CI\Backups\' -Directory | Sort-Object LastWriteTime -Descending | Select-Object -First 1
Write-Host "Restoring from: $($latest.FullName)"

# Replace template directory
Remove-Item 'F:\CI\Templates\WinBuild2025\' -Recurse -Force
Copy-Item $latest.FullName 'F:\CI\Templates\WinBuild2025\' -Recurse

# Restart runner
Start-Service act_runner
```

*No backup exists*: must re-provision the template from scratch.
Follow `docs/WINDOWS-TEMPLATE-SETUP.md` → Fase A (Deploy) → Fase B (Prepare).
Estimated time: 2-4 hours including Windows Update.

**Escalation**: If VMware Workstation itself is damaged (rare), reinstall VMware and re-import the template VMX. The VMDK files survive a VMware reinstall as long as the disk is intact.

---

## Quick Reference

| Symptom             | First command                                                      |
| ------------------- | ------------------------------------------------------------------ |
| Runner offline      | `Get-Service act_runner`, then `Restart-Service act_runner`        |
| Phase 2 clone fails | `Test-Path F:\CI\Templates\WinBuild2025\WinBuild2025.vmx`          |
| Disk full           | `Get-PSDrive F \| Select Free`; run `Invoke-RetentionPolicy.ps1`   |
| Stale lock          | `Remove-Item F:\CI\State\vm-start.lock`                            |
| Slow builds         | Check `invoke-ci.jsonl` phase timestamps; check disk I/O           |
| Template corrupt    | Remove `*.lck` files; if persistent, restore from `F:\CI\Backups\` |
| Snapshot missing    | `vmrun listSnapshots <vmx>`; update `GITEA_CI_SNAPSHOT_NAME`       |
| IP collision        | `Remove-Item F:\CI\State\ip-leases\*.lease`; lower `capacity`      |

---

## 5. Template Refresh Procedure

Use this procedure when the template OS needs updated packages, toolchain upgrades, or
a new snapshot.  Run on the **host** with an elevated PowerShell 5.1 session.

### 5.1 Pre-flight

```powershell
# Stop the runner so no CI jobs start during the refresh
Stop-Service act_runner

# Verify no clone VMs are running
& 'C:\Program Files (x86)\VMware\VMware Workstation\vmrun.exe' list
# Expected: "Total running VMs: 0"

# Backup the existing template (keeps last 3 by default)
& 'N:\Code\Workspace\Local-CI-CD-System\scripts\Backup-CITemplate.ps1' -AllTemplates
```

### 5.2 Boot the template

**Windows (WinBuild2025)**:
```powershell
$vmx = 'F:\CI\Templates\WinBuild2025\WinBuild2025.vmx'
& 'C:\Program Files (x86)\VMware\VMware Workstation\vmrun.exe' start $vmx gui
```

**Linux (LinuxBuild2404)**:
```powershell
$vmx = 'F:\CI\Templates\LinuxBuild2404\LinuxBuild2404.vmx'
& 'C:\Program Files (x86)\VMware\VMware Workstation\vmrun.exe' start $vmx gui
```

### 5.3 Apply updates inside the template

**Windows** — connect via WinRM or open the VMware console, then run the Prepare
script from the host:
```powershell
$vmxWin   = 'F:\CI\Templates\WinBuild2025\WinBuild2025.vmx'
$credTgt  = 'BuildVMGuest'    # Windows Credential Manager target
$cred     = Get-StoredCredential -Target $credTgt   # requires CredentialManager module
& 'N:\Code\Workspace\Local-CI-CD-System\template\Prepare-WinBuild2025.ps1' `
    -VMXPath    $vmxWin `
    -Credential $cred
```

**Linux** — SSH into the template and run the toolchain script:
```powershell
$vmxLin = 'F:\CI\Templates\LinuxBuild2404\LinuxBuild2404.vmx'
# Get IP (wait for VMware Tools if needed)
$ip = & 'C:\Program Files (x86)\VMware\VMware Workstation\vmrun.exe' getGuestIPAddress $vmxLin -wait
# Apply updates
& 'N:\Code\Workspace\Local-CI-CD-System\template\Prepare-LinuxBuild2404.ps1' `
    -VMXPath  $vmxLin `
    -SshKeyPath 'F:\CI\keys\ci_linux'
```

Alternatively, run `Install-CIToolchain-WinBuild2025.ps1` / `Install-CIToolchain-Linux2404.sh`
manually inside the guest to apply only toolchain changes without the full Prepare script.

### 5.4 Shut down and snapshot

```powershell
# Shut down gracefully (wait up to 120 s)
$vmx = 'F:\CI\Templates\WinBuild2025\WinBuild2025.vmx'   # or Linux vmx
& 'C:\Program Files (x86)\VMware\VMware Workstation\vmrun.exe' stop $vmx soft

# Name: BaseClean_yyyyMMdd  (keeps old name for rollback reference)
$snapshotName = "BaseClean_$(Get-Date -Format 'yyyyMMdd')"
& 'C:\Program Files (x86)\VMware\VMware Workstation\vmrun.exe' snapshot $vmx $snapshotName
Write-Host "Snapshot created: $snapshotName"
```

Confirm no `.vmem` / `.vmsn` files exist before snapshotting (see AGENTS.md item 9):
```powershell
Get-ChildItem (Split-Path $vmx) -Filter '*.vmem'  # must be empty
```

### 5.5 Validate

```powershell
# Run the validation script
& 'N:\Code\Workspace\Local-CI-CD-System\template\Validate-DeployState.ps1' `
    -VMXPath $vmx -SnapshotName $snapshotName
```

For Linux, also run a quick SSH smoke-test from the host:
```powershell
Import-Module 'N:\Code\Workspace\Local-CI-CD-System\scripts\_Transport.psm1' -Force
$result = Invoke-SshCommand -IP $ip -KeyPath 'F:\CI\keys\ci_linux' `
    -Command 'gcc --version && cmake --version' -PassThru
$result.Output
```

### 5.6 Run a smoke workflow

Push a trivial commit to a test repo or trigger a manual workflow run via Gitea UI.
Confirm the job uses the new snapshot and completes successfully.

### 5.7 Promote the new snapshot

Update `GITEA_CI_SNAPSHOT_NAME` in `runner/config.yaml` and redeploy:
```powershell
# Edit runner/config.yaml: set GITEA_CI_SNAPSHOT_NAME to $snapshotName
notepad 'N:\Code\Workspace\Local-CI-CD-System\runner\config.yaml'

# Deploy config and restart runner
Copy-Item 'N:\Code\Workspace\Local-CI-CD-System\runner\config.yaml' `
          'F:\CI\act_runner\config.yaml' -Force
Restart-Service act_runner
```

### 5.8 Retain old snapshot 7 days, then delete

Keep the previous `BaseClean_*` snapshot for 7 days as a rollback point:
```powershell
# List existing snapshots
& 'C:\Program Files (x86)\VMware\VMware Workstation\vmrun.exe' listSnapshots $vmx

# After 7 days, delete the old snapshot (replace OLDNAME with actual name)
# & 'C:\Program Files (x86)\VMware\VMware Workstation\vmrun.exe' deleteSnapshot $vmx OLDNAME
```

### 5.9 Rollback procedure

If a smoke-test failure is discovered after promotion:
```powershell
# Revert runner/config.yaml to prior GITEA_CI_SNAPSHOT_NAME
# (or set it back to 'BaseClean' for the permanent base)
Copy-Item 'N:\Code\Workspace\Local-CI-CD-System\runner\config.yaml' `
          'F:\CI\act_runner\config.yaml' -Force
Restart-Service act_runner
# The prior snapshot is still in the template — jobs will use it immediately.
```

---

## 6. Windows host pre-migration baseline (reference for B7)

Recorded 2026-05-17 — `Measure-CIBenchmark.ps1 × 4 iterations`, Python
orchestrator post-Phase-A, Windows 11 + VMware Workstation Pro,
template `WinBuild2025` / snapshot `BaseClean`.

| Iter | Clone (s) | Start (s) | IP acquire (s) | WinRM (s) | Destroy (s) | Boot total (s) |
|------|-----------|-----------|----------------|-----------|-------------|----------------|
| 1    | 0.63      | 1.75      | 66.57          | 0.01      | 4.81        | 68.96          |
| 2    | 0.63      | 1.89      | 20.21          | 0.01      | 6.39        | 22.74          |
| 3    | 0.62      | 1.72      | 85.07          | 0.01      | 4.50        | 87.42          |
| 4    | 0.61      | 1.72      | 60.97          | 0.01      | 4.20        | 63.31          |
| **avg** | **0.62** | **1.77** | **58.20**     | **0.01**  | **4.98**    | **60.61**      |

**Key finding**: IP-acquire phase dominates total time and is highly variable
(20–85 s) due to VMware Tools guest IP detection latency. Clone/Start/WinRM
are negligible and stable.

**B7 comparison guidance** (tolerance ±20%):

| Metric | Windows baseline | ±20% range |
|--------|-----------------|------------|
| Clone  | 0.62 s          | 0.50–0.74 s |
| Start  | 1.77 s          | 1.42–2.12 s |
| Destroy | 4.98 s         | 3.98–5.98 s |
| Boot total (avg) | 60.6 s | 48.5–72.7 s |

IP-acquire variance on Windows (σ ≈ 26 s) means boot-total comparison
requires ≥10 samples on Linux to be meaningful. If Linux avg boot total
exceeds 72.7 s, open an issue in `TODO.md` with per-phase breakdown before
declaring B7 failed — check whether IP-acquire increased or non-IP phases
regressed.