How to upgrade mattermost running with docker

[shaoran]

I'm hosting mattermost-6.3 via docker. I followed this documentation https://docs.mattermost.com/install/install-docker.html and cloned the repository https://github.com/mattermost/docker then I generated the .env file (from env.example) and with docker-compose -f docker-compose.yml -f docker-compose.without-nginx.yml up -d mattermost is up and running.

So far so good, but now I'd like to do an upgrade to v7.4 but I'm finding quite difficult to find a proper documentation on how to do that.

https://docs.mattermost.com/upgrade/prepare-to-upgrade-mattermost.html says what migrations to execute. v6.7, v7.0 and v7.1 are explicitly listed, so that means that I have to first migrate to v6.7, then to v7.0 and then to v7.1? Or can I just apply all the migration at once?

CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_posts_create_at_id on posts(createat, id);
ALTER TABLE reactions ADD COLUMN IF NOT EXISTS channelid varchar(26) NOT NULL DEFAULT '';
UPDATE reactions SET channelid = COALESCE((select channelid from posts where posts.id = reactions.postid), '') WHERE channelid='';
CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_reactions_channel_id on reactions (channelid);

And after executing these SQL command in psql, then what? The next item in the documentation is Upgrading mattermost server but there is no mention here for docker installations. So what should I do next?

• Stop everyting
• git pull
• look at the differences between the .env file and env.example and apply them to .env
• change the MATTERMOST_IMAGE_TAG from 6.3 to 7.4
• execute docker-compose -f docker-compose.yml -f docker-compose.without-nginx.yml up -d

Is that all? Or are there other things to be considered like the postgres version? Like I said, I fail to find a proper documentation of the necessary steps to upgrade when you run with docker.

And what about plugins? Do I need to do something specific to upgrade those too or are they automatically upgraded when you upgrade mattermost?

Am I missing something?

[FarhanShares]

I'm also a bit confused right now. I've mm 7.1 EE installed via docker compose. There's a guide (https://github.com/mattermost/docker/blob/main/scripts/UPGRADE.md) but it's not super clear to me. Specially the list of env vars are confusing me a lot.

[VA2XJM]

Edit .env and change the version number to version wished. Once done, save.

Then:

docker-compose pull
docker-compose down
docker-compose -f docker-compose.without-nginx.yml -f docker-compose.yml up -d

[getsueineko]

Edit .env and change the version number to version wished. Once done, save.

Then:

docker-compose pull
docker-compose down
docker-compose -f docker-compose.without-nginx.yml -f docker-compose.yml up -d

What about upgrade to 8.0 version? I did everything that is described above, however, at startup, they write to me that I have the wrong version of the mattemost-server, and after starting there is no version in the about option.

Update: I'm not alone mattermost/mattermost#24034