remindrun 0.8.19

Run commands with Reminder monitoring and expose their status to the Android app.

Reminder

Reminder is a minimal prototype for monitoring Linux command runs from an Android app.

The first version has two parts:

• remindrun: a Python command wrapper. Put remindrun before a command to record its status, output tail, exit code, and timestamps.
• Android app: a small native app that polls the remindrun HTTP API, lists runs, and posts a local notification when a run changes from running to finished.

Python monitor

Install the local package in a virtual environment:

python3 -m venv .venv
.venv/bin/python -m pip install -e .

Or install the built wheel:

.venv/bin/python -m pip install dist/remindrun-0.8.19-py3-none-any.whl

Start the status server on the Linux machine:

remindrun server --host 0.0.0.0 --port 8765 --token change-this-token

Run commands through Reminder:

remindrun sleep 5
remindrun run -- bash -lc 'echo hello && sleep 2 && echo done'
remindrun status

You can use the shorter rrun command for the same actions:

rrun sleep 5
rrun ngrok --domain <YOUR_DEV_DOMAIN>.ngrok-free.dev

Cloud sync

The recommended setup is cloud sync. The Linux machine does not need a public IP, ngrok, or port forwarding. The command runner uploads status to Reminder Cloud, and the Android app reads the same account from the cloud API.

The default cloud relay is:

http://106.14.246.204

After deploying the Docker cloud server on Aliyun or the Cloudflare Worker in cloudflare/, log in once on each new machine:

pip install -U remindrun
rrun login

The command prints a QR code and a 6-digit pair code. The cloud URL is built in and hidden from the normal UI. Pair codes expire after 5 minutes and are cancelled automatically when rrun login exits without pairing. If the machine is already logged in, rrun login asks before replacing the login. Press Enter to continue, or type n to cancel.

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Tap Scan in the Android app to scan the QR code with the built-in camera scanner, or scan it with the phone camera to open Reminder and pair automatically. If QR scanning is unavailable, enter the 6-digit code; the app pairs automatically when all 6 digits are entered. After pairing, the app saves the cloud account, shows the paired device name, and normal commands sync automatically:

rrun run -- python train.py
rrun run -- sh -c 'for i in $(seq 1 10); do echo tick $i; sleep 1; done'

Each computer that runs rrun login is bound as a device on the same phone account. Use names such as 我的 Mac, 服务器 A, or 实验机 B:

rrun login --device "服务器 A"

The Android app shows an All device view plus one button for each paired computer, so you can switch between all runs and a single machine. Select one device and tap Rename, or long-press a device button, to rename it. Tap Revoke to disable that device's upload token without deleting old history.

Useful cloud commands:

rrun heartbeat status
rrun heartbeat start
rrun heartbeat stop
rrun cloud-status
rrun cloud-logout

After login, rrun starts a small background heartbeat automatically. The cloud marks a device online when it has been seen in the last 90 seconds; each device sends a heartbeat every 60 seconds with a device-specific 0-59 second startup offset to avoid synchronized traffic spikes.

Advanced/manual login is still available:

rrun cloud-login --api-url https://your-reminder-cloud.workers.dev --account ethan --token <TOKEN>

Cloud sync uses the app's account token as the account key. Anyone with that token can see and delete that account's run history, so treat it like a password.

Deploy Reminder Cloud with Docker

The Docker cloud server exposes the same API as the Cloudflare Worker and stores data in SQLite:

docker build -f Dockerfile.cloud -t reminder-cloud .
docker run -d --name reminder-cloud --restart unless-stopped \
  -p 80:8000 \
  -v /opt/reminder-cloud-data:/data \
  reminder-cloud

Check it:

curl http://106.14.246.204/health

For production, prefer putting a domain and HTTPS reverse proxy in front of it. Plain HTTP works for quick testing because the Android app allows cleartext traffic, but HTTPS is safer.

Deploy Reminder Cloud

The included Cloudflare Worker is a small relay service. It stores only command metadata and output tails in Cloudflare KV. The Python runner also keeps a local SQLite database at ~/.reminder/reminder.db, and the Android app caches the latest run list and console output locally so the previous results are visible when the app opens.

cd cloudflare
npm create cloudflare@latest
npx wrangler kv namespace create RUNS

Copy the returned KV namespace id into cloudflare/wrangler.toml, then deploy:

npx wrangler deploy

Cloudflare Workers can run this kind of small personal relay on the free plan within their free usage limits. For many users, long logs, or heavy polling, use a paid plan or a small VPS.

The server exposes:

• GET /health
• GET /api/runs?limit=50
• GET /api/runs/{id}
• GET /api/events?since=<updatedAt>

By default the SQLite database lives at ~/.reminder/reminder.db. Set REMINDER_HOME=/path/to/dir to change that location.

Direct public access

Direct public access is still supported for testing and compatibility. If you do not want cloud sync and do not have a public IP, use a Cloudflare quick tunnel:

remindrun public

This starts the local server and runs cloudflared tunnel --url http://127.0.0.1:8765. It prints a public https://*.trycloudflare.com URL and a token. Newer Android builds default to the built-in cloud pairing flow, so direct server entry is kept only for development and compatibility:

Server: https://example.trycloudflare.com
Token:  generated-token

If cloudflared is missing, install it first:

brew install cloudflared

Cloudflare quick tunnel URLs are random. If you need the same URL every time and do not own a domain, use ngrok's free Dev Domain:

brew install ngrok/ngrok/ngrok
ngrok config add-authtoken <YOUR_NGROK_AUTHTOKEN>
remindrun ngrok --domain <YOUR_DEV_DOMAIN>.ngrok-free.dev

Older Android builds with manual server entry can use:

Server: https://<YOUR_DEV_DOMAIN>.ngrok-free.dev
Token:  generated-token

If the Android app needs to connect to a server that already has a public IP or a public domain:

remindrun server --host 0.0.0.0 --port 8765 --token a-long-random-token

Then open TCP port 8765 in the cloud security group or firewall.

In the Android app:

Server: http://<public-ip>:8765
Token:  a-long-random-token

For real public use, prefer HTTPS through a reverse proxy or tunnel. Plain http://<public-ip>:8765 works for testing, but the token can be observed on an untrusted network.

Android app

Open the android/ directory in Android Studio.

For an emulator, the default server URL is:

http://10.0.2.2:8765

For a physical phone, start the server with --host 0.0.0.0, put the phone on the same network, then set the app server URL to:

http://<linux-machine-ip>:8765

If the server was started with --token, enter the same token in the app's Token field.

Tap Save to lock the Server and Token fields. Tap Unlock before editing them again.

Tap Delete on a run in the history list to delete it from the server.

Tap a run, or tap Console, to open the run's terminal output. Use Back to return to the main list.

App updates

Sideloaded APKs cannot discover updates by themselves unless the app can read a public version file. GitHub is not required. For mainland China, prefer a mirror such as Gitee, Aliyun OSS, Tencent COS, Qiniu, or Upyun, and keep GitHub as a fallback.

This app defaults to checking these sources in order:

https://gitee.com/hushuguo/reminder/raw/main/update.json
https://raw.githubusercontent.com/hushuguo/Reminder/main/update.json

Create a public JSON file like update.json:

{
  "android": {
    "versionCode": 33,
    "versionName": "0.6.22",
    "apkUrl": "https://gitee.com/hushuguo/reminder/raw/main/releases/android-v0.6.22/Reminder.apk",
    "apkUrls": [
      "https://gitee.com/hushuguo/reminder/raw/main/releases/android-v0.6.22/Reminder.apk"
    ],
    "notes": "Improves update UX with a quiet red-dot indicator, APK download progress, and safe failure handling."
  }
}

The update URLs are built into the app and are not shown to users. On startup, the app checks for updates in the background. If versionCode is higher than the installed APK, the app shows an update label with the new version in the top-right corner. Tap it to download the APK in-app with progress shown in the status area. If download or installation fails, the installed version is left untouched.

This prototype polls every 5 seconds while the app process is alive. A later version should move polling into a foreground service or push channel if you want reliable notifications while the app is fully backgrounded.