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Image Artist: Nginx Fails to Start After Upgrading to ImA v1.5.1 on Systems Using S3 Storage

Nick Wyatt
  • Updated

Description

After upgrading from ImA v1.5.0 to v1.5.1, systems that use S3-based storage may find that the nginx service does not start.

In the nginx logs, you’ll typically see an error similar to:
 
nginx: [emerg] host not found in upstream "minio-data:9500" in /etc/nginx/conf.d/default.conf:20
 
This issue only affects installations where internal MinIO data services are disabled because S3 is being used.
 

Cause

On S3-based systems, the internal minio-data containers are not running, and nginx should be updated to reference the minio-internal endpoints instead.

The patching logic was not included in the v1.5.1 upgrade workflow. As a result, nginx continues to reference containers which don’t exist in S3 deployments, hence nginx fails to start with a missing-host error.

 

Workaround

To resolve the issue manually, you can patch the Image Artist 1.5.1 nginx configuration using the following steps:

  1. Undeploy the Image Artist stack

    Refer to: Image Artist: How do I redeploy/restart the container stack?

  2. Navigate to the ImA‑1.5.1 installation directory, then run all four commands below:

    sed -i 's\        server minio-data:9500; # minio-data\        server minio-internal:9000; # minio-data\g' config/nginx_gemma
sed -i 's\        server minio-data:9501; # minio-data\        server minio-internal:9001; # minio-data\g' config/nginx_gemma
sed -i 's\        server minio-data:9500; # minio-data\        server minio-internal:9000; # minio-data\g' nginx/columbus.conf
sed -i 's\        server minio-data:9501; # minio-data\        server minio-internal:9001; # minio-data\g' nginx/columbus.conf

  3. Redeploy the Image Artist stack

    Refer to: Image Artist: How do I redeploy/restart the container stack?

    Once these changes are applied, nginx should start normally and the system will operate correctly with S3 storage.

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