[MESOS-9066] Changing `CREATE_VOLUME` and `CREATE_BLOCK` to `CREATE_DISK`.

• Type: Task
• Status: Resolved
• Priority: Major
• Resolution: Done
• Fix Version/s: 1.7.0
• Component/s: storage
• Labels: mesosphere storage
• Target Version/s: 1.7.0
• Epic Link: Resource Provider and CSI Tech Debt
• Sprint: Mesosphere Sprint 2018-24
• Story Points: 3
• Assignee: Chun-Hung Hsiao
• Reporter: Chun-Hung Hsiao
• Shepherd: Benjamin Bannier
• Created: 10/Jul/18 03:18
• Updated: 07/Aug/18 19:05
• Resolved: 13/Jul/18 21:56

Description

Mesos 1.5 introduced four new operations for better storage support through CSI. These operations are:

• CREATE_VOLUME converts RAW disks to MOUNT or PATH disks.
• DESTROY_VOLUME converts MOUNT or PATH disks back to RAW disks.
• CREATE_BLOCK converts RAW disks to BLOCK disks.
• DESTROY_BLOCK converts BLOCK disks back to RAW disks.

However, the following two issues are raised for these operations:

1. "Volume" is overloaded and leads to conflicting/inconsistent naming.
2. The concept of "PATH" disks does not exist in CSI, which could be problematic.

To address this, we could change CREATE_VOLUME/CREATE_BLOCK to CREATE_DISK, and DESTROY_VOLUME/DESTROY_BLOCK to DESTROY_DISK, and make CREATE_DISK support only MOUNT and BLOCK disks.

Issue Links

• incorporates: MESOS-8997 Consider dropping PATH disk support for CSI volumes.