Lab Access Troubleshooting: Resetting Machines, Faster Provisioning, and Resolving GitLab 404 Errors
Lab Access Troubleshooting: Resetting Machines, Faster Provisioning, and Resolving GitLab 404 Errors
Managing your Practical DevSecOps lab environment should be smooth and predictable. Whether you’re a beginner launching
your first lab or an experienced practitioner spinning up multiple scenarios, understanding how to reset machines, speed
up provisioning, and access GitLab correctly will save you time and frustration. This guide walks you through the most
common lab‑access issues, offers step‑by‑step solutions, and provides handy tips to keep your learning journey on track.
Table of Contents
1. Do I Need to Delete Old Machines?
2. Why Is Lab Provisioning Slow and How Can I Fix It?
3. GitLab Returns a 404 Page Not Found – What to Do
4. Quick Access: Lab Portal URL
5. Best‑Practice Tips & Frequently Asked Questions
Do I Need to Delete Old Machines?
Short answer: No, you don’t have to delete machines after each lab.
When you should consider resetting a machine
- Encountering unexpected errors (e.g., services failing to start, broken network configuration).
- Configuration drift after experimenting with system settings or installing additional packages.
- Resource constraints on the shared lab infrastructure (rare, but possible during peak usage).
How to reset a machine safely
1. Log in to the Lab Portal – navigate to the Machines section.
2. Locate the specific instance you want to reset.
3. Click “Reset” (or “Re‑provision”) and confirm the action.
4. Wait a few minutes while the platform rebuilds the VM to its original snapshot.
Pro tip: Resetting restores the machine to a clean state without permanently deleting any of your lab data. You can
always re‑run the lab instructions from the beginning.
Why Is Lab Provisioning Slow and How Can I Fix It?
Provisioning delays are often caused by network hiccups, browser cache issues, or temporary load on the lab
infrastructure.
Step‑by‑step troubleshooting checklist
1. Reset the machines first – a fresh start eliminates hidden configuration problems.
2. Test your network connectivity using the built‑in diagnostic tool:
https://portal.practical-devsecops.training/machines/test-connection
- The test checks DNS resolution, latency, and port accessibility required for the labs.
3. Clear browser cache & cookies or try an incognito/private window.
4. Switch browsers – Chrome, Edge, and Firefox are all supported; Safari may have occasional quirks.
5. Verify VPN or corporate firewall settings – ensure outbound traffic to *.lab.practical-devsecops.training on
ports 80/443 is allowed.
Example scenario
You’ve attempted to provision a “Vulnerability Scanning” lab three times, each attempt taking over 10 minutes.
Solution: Reset the lab machine, run the connection test (which shows “All checks passed”), then re‑provision. The lab
should now spin up in under 2 minutes.
If provisioning still takes longer than 5 minutes after these steps, contact support with the machine ID and a
screenshot of the connection test results.
GitLab Returns a 404 Page Not Found – What to Do
A 404 error typically means you’re trying to reach the wrong GitLab instance URL or you haven’t logged in with the
correct credentials.
Correct URL format
https://gitlab-ce-<machine_id>.lab.practical-devsecops.training
- Replace <machine_id> with the identifier shown on your Lab Portal (e.g., gitlab-ce-42).
Logging in successfully
1. Open the URL in your browser.
2. Use the username/password supplied in the Basic CI/CD chapter of the lab guide.
- These credentials are unique per lab and are listed under the “Credentials” section of the exercise.
- Default credentials for the Gitlab is username: "root" password: "pdso-training"
3. After logging in, you should land on the GitLab dashboard where you can clone repositories, create pipelines, and
explore the CI/CD features.
Common pitfalls
| Symptom | Likely cause | Fix |
|---------|--------------|-----|
| 404 error after entering URL | Typo in machine ID or missing “https://” | Double‑check the URL format and copy‑paste
directly from the portal. |
| Login page appears, but credentials are rejected | Using credentials from a different lab | Refer back to the Basic
CI/CD chapter for the correct set. |
| Page loads but shows “Repository not found” | Trying to access a repo that hasn’t been created yet | Follow the lab
steps to create the repository first. |
Quick Access: Lab Portal URL
All lab management actions (reset, provision, network test, and credential lookup) are performed through the central
portal:
**🔗 **https://portal.practical-devsecops.training/
Bookmark this link and keep it handy throughout your training.
Best‑Practice Tips & Frequently Asked Questions
Tips for a Smooth Lab Experience
- Always reset before a new lab if you suspect leftover configuration from a previous exercise.
- Run the network test after any major change to your local environment (new Wi‑Fi network, VPN activation, etc.).
- Use a dedicated browser profile for labs to avoid cookie conflicts with personal accounts.
Frequently Asked Questions
| Question | Answer |
|----------|--------|
| Do I need to delete a machine after each lab? | No. Deleting is unnecessary; resetting is sufficient. |
| What if the connection test fails? | Note the specific error (DNS, latency, blocked port) and adjust your network or
firewall settings accordingly. |
| Can I access GitLab from a mobile device? | Yes, but a desktop browser provides a better experience for pipeline
configuration. |
| Where do I find the credentials for GitLab? | In the Basic CI/CD chapter of the lab guide, under the “Credentials”
subsection. |
| What should I do if provisioning never finishes? | Reset the machine, run the network test, clear your browser cache,
and if the issue persists, open a request to real agent with the machine ID. |
Closing Thoughts
Effective lab management is a cornerstone of successful DevSecOps training. By resetting machines when needed, verifying
network health before provisioning, and using the correct GitLab URL and credentials, you’ll minimize downtime and
maximize learning. Keep this guide bookmarked, and refer back whenever you encounter access issues—your labs will run
like a well‑orchestrated pipeline!