Server reports version 4.4 after upgrade to 5.0

[timw]

I just upgraded one of my replica set nodes to MongoDB 5.0 from 4.4, but it’s still reporting the previous version after restart.

I’m on CentOS 7, and I must have messed up something to do with the repo data.

This is what I did:

I added the 5.0 repo data, so I have this in /etc/yum.repos.d/mongodb.repo

    [mongodb-org-4.4]
    name=MongoDB Repository
    baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/4.4/x86_64/
    gpgcheck=1
    enabled=0
    gpgkey=https://www.mongodb.org/static/pgp/server-4.4.asc
    
    [mongodb-org-5.0]
    name=MongoDB Repository
    baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/5.0/x86_64/
    gpgcheck=1
    enabled=0
    gpgkey=https://pgp.mongodb.com/server-5.0.asc

(I left the 4.4 lines in the file, because the current version is/was 4.4. I don’t know if this makes a difference).

I did a graceful shutdown of the replica set member, then ran the upgrade like so:

yum --enablerepo mongodb-org-5.0 update mongodb-org

Yum reported to be updating to 5.0.23 and looking at yum info mongodb-org now it all looks good. I see this:

Name        : mongodb-org
Arch        : x86_64
Version     : 5.0.23
Release     : 1.el7
Size        : 0.0
Repo        : installed
From repo   : mongodb-org-5.0

But the server still reports version 4.4. I can see this when I connect from the shell, and when checking the binary’s version:

$ mongod --version
db version v4.4.4
Build Info: {
    "version": "4.4.4",
    "gitVersion": "8db30a63db1a9d84bdcad0c83369623f708e0397",
    ...

What am I missing?

---

Update: I’ve just noticed that the mongodb-org-server package shows as being installed from the old 4.4 repo, although to the best of my knowledge I installed it via the mongodb-org metapackage, which still states it includes the server. I will try upgrading mongodb-org-server and see if this fixes it.

[timw]

Fixed.

For whatever reason, updating the mongdb-org meta package from the old repo to the new one didn’t work, and created a bit of a mess.

Instead I removed all the 4.4 version packages first, then installed the 5.0 meta package. All good.