How to pass Amazon S3 credentials to mmctl remotely

Troubleshooting
1

Hello everyone,

I am trying to export mattermost data. I use Amazon S3 to save attachments. I am not sure how to pass Amazon S3 credentials to the mmctl command.

Here is what I tried :

$ ./mmctl auth login https://my-website.com

$ ./mmctl export create --attachments
$ ./mmctl export job list
ID: yq3t6kkmzpb15xqyjtn8ui6g3w
Type: export_process
Status: error
Created: 2025-10-12 18:30:36 +0530 IST
Started: 2025-10-12 18:30:46 +0530 IST
Data: map[channel_schemes_exported:0 channels_exported:81 direct_channels_exported:655 direct_posts_exported:38294 error:Error during job execution. — exportFileAttachment: Failed to copy file during export., err=The specified key does not exist. include_attachments:true include_roles_and_schemes:true posts_exported:38461 roles_exported:22 team_schemes_exported:0 teams_exported:3 users_exported:174]

How exactly should I pass:

aws_access_key_id and aws_secret_access_key

to the mmctl command?

Please note these are saved in my config.json in the remote server. Can I not tell mmctl to lookup that file?

Thank you,

Ashim

2

Hello everyone,

Can someone please help me with this?

Thank you,

Ashim

3

Thanks for the detailed logs, Ashim!

mmctl export ... --attachments runs server-side and pulls from the server’s S3 settings, so there’s no way (or need) to pass aws_access_key_id/aws_secret_access_key to mmctl; instead confirm your S3 config in the Mattermost server’s FileSettings (bucket/region/key/secret, and any path prefix) and IAM permissions, as “The specified key does not exist” often means a bucket/key prefix mismatch. See the docs for Bulk export and for Configuration settings (config.json).

4

Dear John,

Many thanks for your reply.

I tried going to: System Console > Environment > File Storage > Test Connection

and it worked all OK.

We do not have a path prefix. That setting is empty.

Any ideas for me ?

Many thanks,

Ashim