We are currently using mender 2.2. and i saw that there is a big change in image/artifact creation between 2.2 et 2.3 (and newer).
I was wondering if there was any relation between client and server version number.
ie : can we upgrade the server with “old” clients remaining or de we have to force upgrade of clients as we upgrade server.
No, the older clients can still connect. We use semantic versioning so between 2.2 and 2.3, only backwards-compatible changes have been made. Full details on compatibility are in our docs. The 2.3 version of those docs are here.