Make OpenCloud useable with Multi Node Network Storage Driver

[dragotin]

Description

Currently OpenCloud requires to run (for example) with NFS in sync mode. That is bad for performance. A better alternative is to add calls to fsync() after write operations in OpenCloud.

User Stories

• As an admin, I want to scale OpenCloud with Multi Node Storage drivers for Network Storage

Value

Fast and reliable OpenCloud

Acceptance Criteria

For multi node OpenStack:

• NFS in async mode is usable
• Mounted CephFS works in default mode
• the fsync() call can be disabled by a config option

Definition of ready

• Everybody needs to understand the value written in the user story
• Acceptance criteria have to be defined
• All dependencies of the user story need to be identified
• Feature should be seen from an end user perspective
• Story has to be estimated
• Story points need to be less than 20

Definition of done

• Functional requirements
  • Functionality described in the user story works
  • Acceptance criteria are fulfilled
• Quality
  • Code review happened
  • CI is green (that includes new and existing automated tests)
  • Critical code received unit tests by the developer
• Non-functional requirements
  • No sonar cloud issues
• Configuration changes
  • The next branch of the OpenCloud charts is compatible