Update docs for client.cinder to support COW snapshots #1375
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This is to support copy on write snapshots: ``` Performing standard snapshot because direct snapshot failed: no write permission on storage pool images: nova.exception.Forbidden: no write permission on storage pool images ``` when using ceph for nova ephemeral storage. My preferrence is for a standardised configuration rather than another if you use this feature, do this.
Alex-Welsh
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Nov 14, 2024
releasenotes/notes/adjust-ceph-permissions-on-images-for-cinder-user-3154b995916ee27e.yaml
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…r-user-3154b995916ee27e.yaml Co-authored-by: Alex-Welsh <[email protected]>
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Thanks Alex - Hoping @MoteHue might be able to test this (particularly the command in the release note). Make sure you grab a copy of the current capabilities before changing them. |
Alex-Welsh
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MoteHue
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Nov 15, 2024
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Thanks Alex - Hoping @MoteHue might be able to test this (particularly the command in the release note). Make sure you grab a copy of the current capabilities before changing them.
This command does work, but we should also bring to attention two things:
- You need to update the ceph keyrings under cinder and nova configs to remove the read-only flag too.
- This will break snapshots of boot-from-image instances unless the glance option
show_multiple_locationsis enabled.
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Should we post an update to the Ceph docs at https://docs.ceph.com/en/latest/rbd/rbd-openstack/#setup-ceph-client-authentication ? |
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This is to support copy on write snapshots:
when using ceph for nova ephemeral storage. My preferrence is for a standardised configuration rather than another if you use this feature, do this.