[Solved] Migrating Issues from omnibus to docker

Troubleshooting
1

Summary

Multiple issues with users and channels when migrating from omnibus to docker, following the official guide.

Steps to reproduce

Follow migration guide on GitHub - mattermost/mattermost-omnibus: A simple way to install Mattermost. until step 4) Restore data

Expected behavior

Logging into the instance, I would expect all users and channels to exist.

Observed behavior
First when restoring the database there are multiple issues, that e.g. indexes are already existent. I ignore these and assume them expected.
Issue 1) When I log in, no users exist.

I drop the whole mattermost database in postgres and then pg_restore my backup again. This time, no errors. I log in, and all users exist!
Issue 2)
When I try to access anything that is not the system console, I get the error page “Channel is private or does not exist. "

not_found
not_found929×338 12.2 KB

Checking in the system console web UI under channels, the list is empty.

empty
empty998×400 12.9 KB

I check the DB, there are channels listed.

channels
channels1445×816 131 KB

I confirm the folder structure of the /data directory are identical from copying over and permissions are correctly set for pid 2000.

tree
tree610×1340 77.4 KB

Tree view limited to 5 layers

permissions
permissions456×164 6.65 KB

I have no more ideas what to do and fix the missing channels. I would be very thankful for any help.

2

Solved the Issue for now.

I edited the .env file and changed the MATTERMOST_IMAGE_TAG from the fixed Version 10.5.2 to latest. Now it works, all channels are detected. Maybe this and also the other struggles I had with the import could be considered in the migration guide.

3

Woot! Welcome back to the forums, @proxycon! And thank you for following up with that solution!