Synology NAS Container Manager Image Pull Failed: How to Fix It

Easy 10-20 minutes Low Severity Verified June 2026
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Error Code
Container Manager image pull failed
Brand
Synology
Product Type
nas
Severity
Low
DIY Difficulty
Easy
Estimated Fix Time
10-20 minutes
The Container Manager image pull failed error on Synology NAS occurs when Docker can't download container images from registries due to network timeouts, connectivity issues, or registry problems. This is typically a temporary networking issue that can be resolved by switching registry mirrors or checking your internet connection.
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How to Fix Error Code Container Manager image pull failed

  1. Check Internet Connection

  2. Restart Container Manager

    Stopping Container Manager will temporarily halt all running containers

  3. Switch to Docker Mirror Registry

  4. Clear Registry Cache

  5. Try Alternative Image Sources

  6. Configure DNS Settings

  7. Check Firewall Settings

  8. Download Image During Off-Peak Hours

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When to Call a Professional

Contact Synology support if the error persists after trying all troubleshooting steps, especially if other network services on your NAS are also failing. Professional help may be needed if there are underlying network infrastructure issues or if your NAS requires firmware updates that you're not comfortable performing.

Frequently Asked Questions

Why does Synology Container Manager fail to pull Docker images?
Container Manager image pull failures typically occur due to network connectivity issues, Docker registry timeouts, DNS resolution problems, or firewall restrictions blocking access to container registries.
How do I change the Docker registry mirror on Synology NAS?
Open Container Manager, go to the Registry tab, click on Docker Hub, select Configure, and change the Registry URL to a mirror like mirror.gcr.io. Click Apply to save the changes.
Can I use alternative container registries instead of Docker Hub?
Yes, you can use alternative registries like GitHub Container Registry (ghcr.io), Quay.io, or vendor-specific registries. Simply change the image source URL when pulling containers.
What should I do if clearing the registry cache doesn't work?
Try switching DNS servers to public ones like Google (8.8.8.8) or Cloudflare (1.1.1.1), check firewall settings, or attempt the download during off-peak hours when registry servers are less congested.

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