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feat: add support for user to list snapshots that are part of a set
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return a json list of VGs that have include a list of the LVs that
are in the snapshot set.

Signed-off-by: Todd Gill <[email protected]>
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@trgill
trgill committed Feb 7, 2024
1 parent b39b2ab commit f0abbdd
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278 changes: 277 additions & 1 deletion README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -73,7 +73,9 @@ If before running the role, with :

This variable is required. snapshot_lvm_snapset_name is a string that will be
appended to the name of the LV when the snapshot set is created. It will be used
to identify members of the set.
to identify members of the set. It must be at least one character long and contain
valid characters for use in an LVM volume name. A to Z, a to z, 0 to 9, underscore (_),
hyphen (-), dot (.), and plus (+) are valid characters.

If before running the role, the following LVs exist:

Expand Down Expand Up @@ -152,6 +154,280 @@ be removed by the remove command without snapshot_lvm_verify_only.
snapshot_lvm_verify_only is intended to be used to double check that the snapshot or
remove command have completed the operation correctly.

### Variables Exported by the Role

#### snapshot_facts

Contains volume and mount point information for a given snapset.

For example:

```json
{
"volumes": {
"vg3": [
{
"lv_uuid": "VY7oRQ-zB1q-DzsP-1y7G-J3gL-ci1e-nQXwAy",
"lv_name": "lv1_vg3",
"lv_full_name": "vg3/lv1_vg3",
"lv_path": "/dev/vg3/lv1_vg3",
"lv_size": "1073741824",
"origin": "",
"origin_size": "1073741824",
"pool_lv": "",
"lv_tags": "",
"lv_attr": "owi-a-s---",
"vg_name": "vg3",
"data_percent": "",
"metadata_percent": ""
},
{
"lv_uuid": "Yhn7RG-k7pM-ylf9-NNt8-xuGI-WwrF-i0Pf6T",
"lv_name": "lv1_vg3_snapset2",
"lv_full_name": "vg3/lv1_vg3_snapset2",
"lv_path": "/dev/vg3/lv1_vg3_snapset2",
"lv_size": "322961408",
"origin": "lv1_vg3",
"origin_size": "1073741824",
"pool_lv": "",
"lv_tags": "",
"lv_attr": "swi-a-s---",
"vg_name": "vg3",
"data_percent": "0.00",
"metadata_percent": ""
},
{
"lv_uuid": "NlwbxX-NhwK-IHTj-sV9k-ldZY-Twvj-2SiCVe",
"lv_name": "lv2_vg3",
"lv_full_name": "vg3/lv2_vg3",
"lv_path": "/dev/vg3/lv2_vg3",
"lv_size": "1073741824",
"origin": "",
"origin_size": "1073741824",
"pool_lv": "",
"lv_tags": "",
"lv_attr": "owi-a-s---",
"vg_name": "vg3",
"data_percent": "",
"metadata_percent": ""
},
{
"lv_uuid": "j0RCzX-OVaA-MGDw-ejHO-Eu35-f4yG-VJL2Kr",
"lv_name": "lv2_vg3_snapset2",
"lv_full_name": "vg3/lv2_vg3_snapset2",
"lv_path": "/dev/vg3/lv2_vg3_snapset2",
"lv_size": "322961408",
"origin": "lv2_vg3",
"origin_size": "1073741824",
"pool_lv": "",
"lv_tags": "",
"lv_attr": "swi-aos---",
"vg_name": "vg3",
"data_percent": "0.66",
"metadata_percent": ""
},
{
"lv_uuid": "8kfTDY-22SL-4tC7-vTsR-1R63-zVzq-55qEL3",
"lv_name": "lv3_vg3",
"lv_full_name": "vg3/lv3_vg3",
"lv_path": "/dev/vg3/lv3_vg3",
"lv_size": "125829120",
"origin": "",
"origin_size": "125829120",
"pool_lv": "",
"lv_tags": "",
"lv_attr": "owi-a-s---",
"vg_name": "vg3",
"data_percent": "",
"metadata_percent": ""
},
{
"lv_uuid": "babChm-IzEN-Pf8q-1dxk-BJ9R-3kZb-u91utS",
"lv_name": "lv3_vg3_snapset2",
"lv_full_name": "vg3/lv3_vg3_snapset2",
"lv_path": "/dev/vg3/lv3_vg3_snapset2",
"lv_size": "41943040",
"origin": "lv3_vg3",
"origin_size": "125829120",
"pool_lv": "",
"lv_tags": "",
"lv_attr": "swi-a-s---",
"vg_name": "vg3",
"data_percent": "0.00",
"metadata_percent": ""
}
],
"vg2": [
{
"lv_uuid": "8uMuRW-1KCV-8FTJ-frhX-X39o-V15B-1uEC98",
"lv_name": "lv1_vg2",
"lv_full_name": "vg2/lv1_vg2",
"lv_path": "/dev/vg2/lv1_vg2",
"lv_size": "1073741824",
"origin": "",
"origin_size": "1073741824",
"pool_lv": "",
"lv_tags": "",
"lv_attr": "owi-a-s---",
"vg_name": "vg2",
"data_percent": "",
"metadata_percent": ""
},
{
"lv_uuid": "GGssIK-SHYI-to1m-MhVL-2BDk-PJ8X-dBnL7G",
"lv_name": "lv1_vg2_snapset2",
"lv_full_name": "vg2/lv1_vg2_snapset2",
"lv_path": "/dev/vg2/lv1_vg2_snapset2",
"lv_size": "322961408",
"origin": "lv1_vg2",
"origin_size": "1073741824",
"pool_lv": "",
"lv_tags": "",
"lv_attr": "swi-aos---",
"vg_name": "vg2",
"data_percent": "20.97",
"metadata_percent": ""
},
{
"lv_uuid": "83A9VM-kVEy-sc60-kF14-gKGb-5Ryj-7yDyEG",
"lv_name": "lv2_vg2",
"lv_full_name": "vg2/lv2_vg2",
"lv_path": "/dev/vg2/lv2_vg2",
"lv_size": "83886080",
"origin": "",
"origin_size": "83886080",
"pool_lv": "",
"lv_tags": "",
"lv_attr": "owi-a-s---",
"vg_name": "vg2",
"data_percent": "",
"metadata_percent": ""
},
{
"lv_uuid": "6tVL8A-U1x1-qqUt-WFVG-POsG-msFs-ZbbPq1",
"lv_name": "lv2_vg2_snapset2",
"lv_full_name": "vg2/lv2_vg2_snapset2",
"lv_path": "/dev/vg2/lv2_vg2_snapset2",
"lv_size": "29360128",
"origin": "lv2_vg2",
"origin_size": "83886080",
"pool_lv": "",
"lv_tags": "",
"lv_attr": "swi-a-s---",
"vg_name": "vg2",
"data_percent": "0.00",
"metadata_percent": ""
}
],
"vg1": [
{
"lv_uuid": "UnN0s0-TauJ-csnN-BgC1-3ocI-p8bE-jz0Hd8",
"lv_name": "lv1_vg1",
"lv_full_name": "vg1/lv1_vg1",
"lv_path": "/dev/vg1/lv1_vg1",
"lv_size": "1073741824",
"origin": "",
"origin_size": "1073741824",
"pool_lv": "",
"lv_tags": "",
"lv_attr": "owi-aos---",
"vg_name": "vg1",
"data_percent": "",
"metadata_percent": ""
},
{
"lv_uuid": "5Np7N9-H15x-Go96-fIwL-E0GR-4fVB-clLDW2",
"lv_name": "lv1_vg1_snapset2",
"lv_full_name": "vg1/lv1_vg1_snapset2",
"lv_path": "/dev/vg1/lv1_vg1_snapset2",
"lv_size": "322961408",
"origin": "lv1_vg1",
"origin_size": "1073741824",
"pool_lv": "",
"lv_tags": "",
"lv_attr": "swi-a-s---",
"vg_name": "vg1",
"data_percent": "20.97",
"metadata_percent": ""
},
{
"lv_uuid": "P0LPUQ-CljS-hOEm-U749-yyr9-USE7-1qDc2N",
"lv_name": "lv2_vg1",
"lv_full_name": "vg1/lv2_vg1",
"lv_path": "/dev/vg1/lv2_vg1",
"lv_size": "41943040",
"origin": "",
"origin_size": "41943040",
"pool_lv": "",
"lv_tags": "",
"lv_attr": "owi-a-s---",
"vg_name": "vg1",
"data_percent": "",
"metadata_percent": ""
},
{
"lv_uuid": "FYIBRe-FDiW-PDUE-3l1y-mLzN-bLEg-qF12cz",
"lv_name": "lv2_vg1_snapset2",
"lv_full_name": "vg1/lv2_vg1_snapset2",
"lv_path": "/dev/vg1/lv2_vg1_snapset2",
"lv_size": "16777216",
"origin": "lv2_vg1",
"origin_size": "41943040",
"pool_lv": "",
"lv_tags": "",
"lv_attr": "swi-a-s---",
"vg_name": "vg1",
"data_percent": "0.00",
"metadata_percent": ""
}
]
},
"mounts": {
"/dev/vg3/lv1_vg3": null,
"/dev/vg3/lv1_vg3_snapset2": null,
"/dev/vg3/lv2_vg3": null,
"/dev/vg3/lv2_vg3_snapset2": {
"filesystems": [
{
"target": "/tmp/mp1",
"source": "/dev/mapper/vg3-lv2_vg3_snapset2",
"fstype": "xfs",
"options": "rw,relatime,seclabel,attr2,inode64,logbufs=8,logbsize=32k,noquota"
}
]
},
"/dev/vg3/lv3_vg3": null,
"/dev/vg3/lv3_vg3_snapset2": null,
"/dev/vg2/lv1_vg2": null,
"/dev/vg2/lv1_vg2_snapset2": {
"filesystems": [
{
"target": "/tmp/production_mnt",
"source": "/dev/mapper/vg2-lv1_vg2_snapset2",
"fstype": "xfs",
"options": "rw,relatime,seclabel,attr2,inode64,logbufs=8,logbsize=32k,noquota"
}
]
},
"/dev/vg2/lv2_vg2": null,
"/dev/vg2/lv2_vg2_snapset2": null,
"/dev/vg1/lv1_vg1": {
"filesystems": [
{
"target": "/mount",
"source": "/dev/mapper/vg1-lv1_vg1",
"fstype": "xfs",
"options": "rw,relatime,seclabel,attr2,inode64,logbufs=8,logbsize=32k,noquota"
}
]
},
"/dev/vg1/lv1_vg1_snapset2": null,
"/dev/vg1/lv2_vg1": null,
"/dev/vg1/lv2_vg1_snapset2": null
}
}
```

## rpm-ostree

See README-ostree.md
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