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Feature
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Resolution: Won't Do
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Critical
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None
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None
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Strategic Portfolio Work
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False
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False
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25% To Do, 25% In Progress, 50% Done
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XL
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0
Feature Overview (aka. Goal Summary)
Allow Datacenter customers to leverage existing SAN infrastructure with OCP Virt with dynamic provisioning and live migration.
Goals (aka. expected user outcomes)
As Data Center OCP admin, I can add my existing expensive SAN infrastructure to OCP nodes to host VM workloads, so that I can better migration VMs from vSphere to OCP Virt.
The goal of Dev Preview release is to to provide MVP functions with limited docs, to get early feedback from customers.
Requirements (aka. Acceptance Criteria):
General:
- Allow Datacenter customers to leverage existing SAN infrastructure with OCP Virt
- Support multiple VMs (virtual disks) out of a single LUN with dynamic provisioning for end-user self service with high level of isolation
- Support live migration of VMs (--> RWX)
DevPreview Scope:
- 1 LUN per VG
- many VMs per VG
- VM can have multiple PV, but they must all be on the same VG (== StorageClass)
- No multi-path
- LiveMigration of a single VM from one node to another (RWX)
- Snapshots/Cloning/ReSizing (CSI conformity >=V1.5)
- Ship as day2 operator, independent of LVM storage or OCP for higher release frequency. We will maintain a single version of the operator support all OCP versions (Rolling-Stream operator, see here for a definition).
- For DevPreview, only the current/latest OCP version will be support. Older versions (incl. EUS) will be supported at a later stage.
More detailed requirements are tracked here
| Deployment considerations | List applicable specific needs (N/A = not applicable) |
| Self-managed, managed, or both | both |
| Classic (standalone cluster) | yes |
| Hosted control planes | yes (using LVMs as storage for etcd), no special needs |
| Multi node, Compact (three node), or Single node (SNO), or all | all |
| Connected / Restricted Network | yes |
| Architectures, e.g. x86_x64, ARM (aarch64), IBM Power (ppc64le), and IBM Z (s390x) | x86 and Arm |
| Operator compatibility | yes |
| Backport needed (list applicable versions) | no |
| UI need (e.g. OpenShift Console, dynamic plugin, OCM) | no |
| Other (please specify) |
Questions to Answer (Optional):
- HW for CI testing - AWS? ReUse from RHV team?
Out of Scope
- Full fledge CI, DevPreview has minimum CI testing
- multi-path SAN (–> TechPreview scope)
- Thin pool only (Thick pool maybe later)
- other kubesan backends then SAN-LUN (NFS, etc)
Background
See Integrate KubeSAN into LVMS to unblock OCP Virt SAN customers ]
Customer Considerations
See Integrate KubeSAN into LVMS to unblock OCP Virt SAN customers ]
Documentation Considerations
- Need to find a docs site / team for this
- Constraints and Limitations / OutOfScope needs to be clearly documented
Interoperability Considerations
- OCP Virt
- Hosted Control Plane
- is related to
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- Under Review
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- links to
