Trim volume size as needed to fit in pool free space #199
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This should resolve #13 |
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We could verify that there is no more extra files from previous PRs, e.g., with |
japokorn
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Feb 20, 2021
This adds a mechanism for trimming requested volume sizes so that they fit in their pool. The intention is to accommodate small shortages arising from metadata space usage, eg: creating a lvm pool on an unpartitioned 10GiB drive and trying to create a single 100GiB volume in that pool. There is no reason a user of this role should have to learn about LVM's metadata usage. The maximum reduction of the volume size is 10% of the requested size.
Playbook will fail when lv size is equal to vg size Signed-off-by: Changhui Zhong <[email protected]>
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I've included the test from #189 since it is intended to verify this change.
I am open to a discussion of whether we should expose
MAX_TRIM_PERCENTin the role defaults. I'm also open to discussion of what the best default value is. I would definitely be open to reducing it to 2-4% as that's more in line with my intended application of this.