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First boot crashed mid-SDK-install, and the dir-existence check then skipped reinstall forever: avdmanager saw the partial tree and died with 'Valid system image paths are: null' (CrashLoopBackOff). v2 tracks install completion with a marker file written only after sdkmanager succeeds + package.xml exists, wipes partial system-image trees before reinstalling, and retries sdkmanager 3x. |
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| .. | ||
| docker | ||
| main.tf | ||
| README.md | ||
| secrets | ||
| terragrunt.hcl | ||
| variables.tf | ||
android-emulator — shared in-cluster Android testing instance
Android 16 (API 36, google_apis/x86_64) emulator running under KVM in the
cluster, so agents can natively test app/PWA changes before shipping (first
tenant: tripit). Decision record: docs/adr/0001-android-emulator-in-cluster.md.
Endpoints
| What | Where |
|---|---|
| adb | adb connect 10.0.20.200:5555 (LAN only; adb is unauthenticated — never expose publicly) |
| Screen (noVNC) | https://android-emulator.viktorbarzin.lan/vnc.html (LAN only) |
Agent quickstart (from a devvm)
# one-time: user-local platform-tools
wget -qO /tmp/pt.zip https://dl.google.com/android/repository/platform-tools-latest-linux.zip
unzip -q /tmp/pt.zip -d ~/android-sdk # → ~/android-sdk/platform-tools/adb
adb="$HOME/android-sdk/platform-tools/adb"
$adb connect 10.0.20.200:5555
$adb -s 10.0.20.200:5555 install app-debug.apk # install an APK
$adb -s 10.0.20.200:5555 shell am start -a android.intent.action.VIEW -d https://tripit.viktorbarzin.me # open a URL
$adb -s 10.0.20.200:5555 shell input tap 540 1200 # drive the UI
$adb -s 10.0.20.200:5555 exec-out screencap -p > /tmp/screen.png # screenshot
The emulator is a single shared instance — adb shell pm list packages,
uninstall your test app when done, and presence-claim
(presence claim service:android-emulator) for long destructive sessions
(wipes, system-image changes).
How it works
- The container image (built from
docker/) holds only JDK 17, cmdline-tools, emulator native libs, Xvfb/x11vnc/noVNC and socat — ~1GB. - The SDK proper (platform-tools, emulator, system image, AVD, snapshots)
lives on the
android-emulator-sdkPVC (proxmox-lvm); the entrypoint installs it idempotently. First boot downloads ~2.5GB (≈9GB unpacked on the PVC) and takes ~15 min (startup probe allows 30); subsequent restarts boot in ~1–2 min. - The emulator renders via swiftshader (CPU) — deliberately NOT scheduled on the contended T4 GPU node.
Rebuilding the image (rare — tool/library bumps only)
cd stacks/android-emulator/docker
docker build -t forgejo.viktorbarzin.me/viktor/android-emulator:<new-tag> .
docker push forgejo.viktorbarzin.me/viktor/android-emulator:<new-tag>
# then bump var.image_tag default in variables.tf and land via CI
Built manually from a devvm on purpose: it changes rarely, and a one-off push doesn't warrant CI plumbing (the off-infra-CI rule targets repeated build IO).
Troubleshooting
- Pod CrashLoops with
FATAL: /dev/kvm not present→ node lost the device or the privileged/Kyverno exclude regressed (android-emulatormust be insecurity_policy_exclude_namespaces, stacks/kyverno). - Wedged Android (won't boot, storage full) → delete the PVC + pod: next boot re-downloads cleanly. Snapshots/AVD state are disposable by design.
- Different API level: set
API_LEVELenv on the deployment (entrypoint installs that system image on the same PVC) or recreate the AVD.