Certificate Issue. Warning: Potential Security Risk Ahead

[faxotherapy]

Hi,

Trying to update my Mattermost instance.

I had no SSL issue using prior version of Mattermost/Traefik, i.e. stack version 3.7

In version 3.8, does the new configuration include accessing the service using HTTPS by default, because in the end, we often want to access the service from the Internet and not necessary locally.

Since update, after following the “Get started”, I've got the following message from Firefox and everything is broken and can no longer access Mattermost on my VPS:

Warning: Potential Security Risk Ahead
[domain] uses an invalid security certificate.
The certificate is not trusted because it is self-signed.
Error code: MOZILLA_PKIX_ERROR_SELF_SIGNED_CERT

I did not have any certificate issue before when using an older version of the stacks. I used “traefik-ssl.yml”, version 3.7.

Obviously, the content between “traefik-ssl.yml”, version 3.7 and “traefik.yml” version 3.8 dramatically changed. In version 3.8 of “traefik.yml” I see the use of letsencrypt. So, don't understand why Firefox still showing “self-signed” certificate.

Also, when forcing the visit, I now have the message:

404 page not found

This is what happened when going from stack version 3.7 to stack version 3.8. I reverted back to stack version 3.7, and I can now access Mattermost.

Even though after issuing the command:

DOMAIN=[MY_DOMAIN] docker stack deploy -c mattermost.yml mattermost

I also put the SCHEME=https argument like I used in the previous version, but not working either.

---

Thanks for your help.