Lab
A Cloud Guru

Recover Mis-Configured or Broken LVM Configurations

In this exercise, you will need to assess the cause of a broken LVM configuration and resolve it without losing the data in the volume. *This course is not approved or sponsored by Red Hat.*

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Path Info

Level

Advanced

Duration

1h 0m

Published

Apr 04, 2019

Challenge

Resolve LVM configuration.
Check the mounts with lsbkl:
```
lsblk
```
Attempt to mount the volume:
```
mount /lvm_mount
```
View the archive metadata:
```
vgcfgrestore -l <VOLGROUP NAME>
```
Review the changes:

"Created before executing 'lvresize -L500M /dev/vg_1/lv_1'"

Restore prior to latest change:
```
vgcfgrestore -f /etc/lvm/archive/vg_1_00002-84057####.vg vg_1
```
Deactivate and reactive the volume:
```
lvchange -an /dev/<VOLGROUP>/<LOG>
```
```
lvchange -ay /dev/<VOLGROUP>/<LOG>
```
Challenge

Verify LVM volume contents.
The MD5s of each file in the volume are available in the /home/cloud_user/lvm_md5s.txt file. Validate that the md5sums haven't changed for the files in the /lvm_mount directory.
```
cat /home/cloud_user/lvm_md5s.txt
```
```
for i in $(ls /lvm_mount/); do md5sum /lvm_mount/$i; done
```

Author

A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

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