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====== LVM Linux ======

#arrêt de ma vm
<code>
virsh list
virsh shutdown mailserver3
</code>

#ajoute 10G au lvm
<code>
lvresize -L+10G  virt-mailserver3-thin
</code>

#cree le snap
<code>
  lvcreate -s \
  -n virt-mailserver3-thin_pre_upgrade_$(date +%Y%m%d) \
  /dev/libvirt_lvm/virt-mailserver3-thin
</code>

#start la vm
<code>
virsh list
virsh start mailserver3
</code>

#surveillance
<code>
lvs -o lv_name,data_percent,metadata_percent libvirt_lvm
</code>

#en ssh sur la vm
<code>
root@mailserver:~# parted /dev/vda
GNU Parted 3.4
Using /dev/vda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print
Model: Virtio Block Device (virtblk)
Disk /dev/vda: 64.4GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start   End     Size    Type      File system  Flags
 1      1049kB  512MB   511MB   primary                boot
 2      513MB   32.2GB  31.7GB  extended
 5      513MB   32.2GB  31.7GB  logical                lvm
</code>

#resize des partitions, l'extended 2 et la logical 3
<code>
resizepart 2 100%
resizepart 5 100%
</code>

<code>
(parted) print
Model: Virtio Block Device (virtblk)
Disk /dev/vda: 64.4GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start   End     Size    Type      File system  Flags
 1      1049kB  512MB   511MB   primary                boot
 2      513MB   64.4GB  63.9GB  extended
 5      513MB   64.4GB  63.9GB  logical                lvm

 (parted) quit

</code>

#on resize le pv
<code>
root@mailserver:~# pvresize /dev/vda5
  Physical volume "/dev/vda5" changed
  1 physical volume(s) resized or updated / 0 physical volume(s) not resized
root@mailserver:~# pvs
  PV         VG            Fmt  Attr PSize   PFree
  /dev/vda5  mailserver-vg lvm2 a--  <59.52g <31.86g

</code>

Ajout de 10G sur /opt
<code>
lvresize --size +10G --resizefs /dev/mailserver-vg/lv_opt
</code>

#detruire le snap une fois que tout fonctionne.
<code>
lvremove /dev/libvirt_lvm/virt-mailserver3-thin_pre_upgrade_YYYYMMDD
</code>