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Add stuff to readme

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Bastian Mäuser
2022-10-21 18:18:24 +02:00
parent 8c6ffc4d85
commit aadf7e656c
1 changed files with 44 additions and 6 deletions
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@@ -51,14 +51,26 @@ functions that enable you to do the following:
- Transfer a running VM to another Cluster
- Continuously update a previously tranferred VM in another Cluster with incemental snapshots
Backup And Restore Ceph for Proxmox VE with retention. This solution implements
a snapshotbackup for Ceph cluster exporting to specific directory. The mechanism using
Ceph snapshot, export and export differential. In backup export image and config
file VM/CT.
Currently this only works with Ceph based storage backends, since the incremental logic heavily
relies on Rados block device features.
It'll work according this scheme:
```
.:::::::::. .:::::::::.
|Cluster-A| |Cluster-B|
| | | |
| _______ | rbd export-diff [..] | ssh pve04 | rbd import-diff [..] | _______ |
| pve01 -|-----------------------------------------------------------|->pve04 |
| _______ | | _______ |
| pve02 | | pve05 |
| _______ | | _______ |
| pve03 | | pve06 |
| _______ | | _______ |
| | | |
|:::::::::| |:::::::::|
```
## Main features
* Currently only for KVM. I might add LXC support when I need to.
@@ -89,6 +101,32 @@ Mirror VM to another Cluster:
```
root@pve01:~/crossover# ./crossover mirror --vmid=100:10100 --destination=pve04 --pool=data2 --keeplocal=4 --keepremote=8 --overwrite --keep-dlock --online
Start mirror 2022-10-21 18:09:36
Transmitting Config for VM 100 to desination 10100
update VM 100: -lock backup
update VM 10100: -lock backup
VM 100 - Issuing fsfreeze-freeze to 100 on pve01
2
VM 100 - Creating snapshot data/vm-100-disk-0@mirror-20221021180936
Creating snap: 100% complete...done.
VM 100 - Creating snapshot data/vm-100-disk-1@mirror-20221021180936
Creating snap: 100% complete...done.
VM 100 - Issuing fsfreeze-thaw to 100 on pve01
2
Exporting image: 100% complete...done.
Importing image diff: 100% complete...done.
Houskeeping localhost data vm-100-disk-0, keeping previous 4 Snapshots
Removing snap: 100% complete...done.
Houskeeping pve04 data2 vm-10100-disk-0, keeping previous 8 Snapshots
Exporting image: 100% complete...done.
Importing image diff: 100% complete...done.
Houskeeping localhost data vm-100-disk-1, keeping previous 4 Snapshots
Removing snap: 100% complete...done.
Houskeeping pve04 data2 vm-10100-disk-1, keeping previous 8 Snapshots
Unlocking source VM 100
root@pve01:~/crossover#
```
This example creates a mirror of VM 100 (in the source cluster) as VM 10100 (in the destination cluster) using the ceph pool "data2" for storing all attached disks. It will keep 4 Ceph snapshots prior the latest (in total 5) and 8 snapshots on the remote cluster. It will keep the VM on the target Cluster locked to avoid an accidental start (thus causing split brain issues), and will do it even if the source VM is running.