Hi all, We are currently working on patches to implement the new GROW_VOLUME and SHRINK_VOLUME operations [1]. In order to make it into Mesos 1.6, we're pursuing a workaround which affects the way these operations are accounted for in the Mesos master. These operations will be marked as *experimental* in Mesos 1.6.
As a result of this workaround, upgrades from Mesos 1.6 to later versions would be affected. Specifically, 1.6 masters would not be able to properly account for the resources of failed GROW/SHRINK operations on 1.7+ agents. This means that when upgrading from Mesos 1.6, if GROW_VOLUME or SHRINK_VOLUME operations are being used during the upgrade, the masters *must* be upgraded first. If we follow this proposal, this constraint would be clearly spelled out in our upgrade documentation. Since, in general, we guarantee compatibility between Mesos masters and agents of the same major version, we wanted to check with the community to see if this constraint on 1.6 upgrades would be acceptable. Please let us know what you think! Cheers, Greg [1] https://issues.apache.org/jira/browse/MESOS-4965
