How to Monitor Omdomda with Vigilmon

Omdomda is a minimal virtual DOM library focused on simplicity. Its tiny footprint and straightforward API make it attractive for lightweight browser applications that need efficient DOM reconciliation without the overhead of larger frameworks. When you ship an Omdomda-powered app to production, Vigilmon keeps it healthy by watching your hosting endpoint, your API backends, and your deployment pipeline 24/7.

What You'll Set Up

• HTTP uptime monitor for your Omdomda app's hosting URL
• API endpoint health check with keyword validation
• SSL certificate expiry alerting
• Cron heartbeat for your build or deployment process
• Alert channels for Slack, email, or webhook

Prerequisites

• An Omdomda application deployed to a hosting environment (static host, CDN, or server)
• A free Vigilmon account
• Basic familiarity with your hosting setup and domain configuration

Step 1: Monitor Your App's Hosting Endpoint

Omdomda apps are typically served as static files from a CDN or web server. Add a basic uptime check to verify the host is reachable and returning your HTML shell:

1. Log in to vigilmon.online and click Add Monitor.
2. Set Type to HTTP / HTTPS.
3. Enter your app URL: https://yourdomain.com.
4. Set Check interval to 1 minute.
5. Set Expected HTTP status to 200.
6. Click Save.

This catches CDN outages, DNS misconfiguration, and hosting provider incidents before your users do.

Step 2: Validate the App Shell with a Keyword Check

Because Omdomda apps mount into a root DOM element, a 200 response from the hosting layer does not guarantee the app shell is intact. Use Vigilmon's keyword monitor to verify the mount point exists:

1. Click Add Monitor → HTTP / HTTPS.
2. Enter your app URL.
3. Under Keyword check, enter the ID of your root element — for example id="app" or the title of your application.
4. Set Expected HTTP status to 200.
5. Click Save.

If a bad deployment wipes the mount point from index.html, Vigilmon alerts you immediately rather than silently serving a blank page.

Step 3: Monitor Your API Backend

Omdomda apps typically fetch data from a REST or GraphQL API. A healthy frontend is useless if the backend is down. Add a monitor for each critical API endpoint:

1. Click Add Monitor → HTTP / HTTPS.
2. Set the URL to your API health endpoint, e.g. https://api.yourdomain.com/health.
3. Set Expected HTTP status to 200.
4. Optionally add a Keyword check for a value like "status":"ok".
5. Click Save.

For APIs that do not have a dedicated health route, monitor the most critical data endpoint your app calls on load — a 200 from that endpoint confirms the backend stack is operational.

Step 4: SSL Certificate Alerts

Apps served over HTTPS depend on a valid TLS certificate. An expired certificate blocks all users and can be invisible to developers who access the site directly by IP. Enable certificate monitoring on your uptime check:

1. Open the monitor created in Step 1.
2. Enable Monitor SSL certificate.
3. Set Alert when certificate expires in less than 21 days.
4. Click Save.

Twenty-one days gives you enough time to renew through Let's Encrypt, your CDN's automatic renewal, or manual intervention before the certificate expires.

Step 5: Heartbeat Monitoring for Your Build Pipeline

If you use a CI/CD pipeline to bundle and deploy your Omdomda app, use Vigilmon's cron heartbeat to verify builds are completing successfully:

1. In Vigilmon, click Add Monitor → Cron Heartbeat.

2. Set the expected ping interval to your deployment cadence (e.g. 24 hours for nightly builds).

3. Copy the heartbeat URL, e.g. https://vigilmon.online/heartbeat/abc123.

4. Add the ping to the end of your deploy script:

   # build and deploy
   npm run build
   rsync -az dist/ user@server:/var/www/html/
   curl -s https://vigilmon.online/heartbeat/abc123
   

If the build fails or the deploy step hangs, the ping is never sent, and Vigilmon alerts you after the expected window lapses.

For GitHub Actions:

- name: Ping Vigilmon heartbeat
  if: success()
  run: curl -s https://vigilmon.online/heartbeat/abc123

Step 6: Configure Alert Channels

1. Go to Alert Channels in Vigilmon and add Slack, email, PagerDuty, or a webhook.
2. Set Consecutive failures before alert to 2 on the hosting monitor to avoid false alarms from transient CDN hiccups.
3. Keep Consecutive failures before alert at 1 on API endpoint monitors — backend failures are deterministic and warrant immediate notification.

To pause alerts during a planned deployment:

curl -X POST https://vigilmon.online/api/maintenance \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{"monitor_id": "YOUR_MONITOR_ID", "duration_minutes": 10}'

Summary

| Monitor | Target | What It Catches | |---|---|---| | HTTP uptime | https://yourdomain.com | CDN outage, DNS failure | | Keyword check | App shell HTML | Broken deployment, missing mount point | | API health | https://api.yourdomain.com/health | Backend crash, database disconnect | | SSL certificate | App domain | Certificate expiry | | Cron heartbeat | Heartbeat URL | Build pipeline failure |

Omdomda's minimal footprint means your app's reliability depends almost entirely on its hosting infrastructure and API backends. Vigilmon gives you continuous visibility into both — so your lightweight frontend stays online as reliably as it is small.