ClonageVM

Le clonage

cf Copie de VM à chaud

root@super-tech:/# virsh domblklist sirh
Target     Source
------------------------------------------------
vda        /var/lib/libvirt/images/sirh-sys.img
vdb        /var/lib/libvirt/images/sirh-data.img

root@super-tech:/# virsh snapshot-create-as --domain sirh sirh-snap --disk-only --atomic --quiesce
Domain snapshot sirh-snap created
root@super-tech:/# virsh snapshot-list sirh
 Name                 Creation Time             State
------------------------------------------------------------
 sirh-snap            2016-03-30 12:10:47 -0400 disk-snapshot

root@super-tech:/# virsh domblklist sirh
Target     Source
------------------------------------------------
vda        /var/lib/libvirt/images/sirh-sys.sirh-snap
vdb        /var/lib/libvirt/images/sirh-data.sirh-snap

root@super-tech:/# rsync -avh --progress /var/lib/libvirt/images/sirh-sys.img /var/lib/libvirt/images2/sirh-sys-COPY.img
sending incremental file list
sirh-sys.img
          4.15G 100%   80.45MB/s    0:00:49 (xfr#1, to-chk=0/1)

sent 4.15G bytes  received 35 bytes  82.21M bytes/sec
total size is 4.15G  speedup is 1.00
root@super-tech:/# rsync -avh --progress /var/lib/libvirt/images/sirh-data.img /var/lib/libvirt/images2/sirh-data-COPY.img
sending incremental file list
sirh-data.img
         19.70G 100%   70.89MB/s    0:04:25 (xfr#1, to-chk=0/1)

sent 19.71G bytes  received 35 bytes  74.23M bytes/sec
total size is 19.70G  speedup is 1.00
root@super-tech:/# virsh blockcommit sirh vda --active --verbose --pivot
Block Commit: [100 %]
Successfully pivoted
root@super-tech:/# virsh blockcommit sirh vdb --active --verbose --pivot
Block Commit: [100 %]
Successfully pivoted
root@super-tech:/# virsh snapshot-list sirh
 Name                 Creation Time             State
------------------------------------------------------------
 sirh-snap            2016-03-30 12:10:47 -0400 disk-snapshot

root@super-tech:/# virsh domblklist sirh
Target     Source
------------------------------------------------
vda        /var/lib/libvirt/images/sirh-sys.img
vdb        /var/lib/libvirt/images/sirh-data.img

root@super-tech:/# root@super-tech:/# rm /var/lib/libvirt/images/sirh-data.sirh-snap /var/lib/libvirt/images/sirh-sys.sirh-snap
root@super-tech:/# 

Création et adaptation de la vm clone

Disons qu'après l'opération de clonage, nous avons : form-sirh-sys.img et form-sirh-data.img.

• création de la nouvelle vm

  root@super-tech:# virt-install --import --disk /var/lib/libvirt/images2/form-sirh-sys.img,device=disk,bus=virtio,io=native --disk /var/lib/libvirt/images2/form-sirh-data.img,device=disk,bus=virtio,io=native --vcpus=1 --ram=1024 --name=form-sirh --hvm --vnc --network bridge:br_dmzrpv_102,model=virtio

  On la met sur un bridge qui n'est pas le bon, juste le temps de changer son IP.
• changement des IP ... hummm ... comment automatiser quand on n'a aucun accès (cf ci-dessus, mauvais bridge, mauvaise IP)
• et qu'on n'a pas de qemu-guest-agent (vm sous Squeeze)
• eh ben : on le fait à la main :

  • côté vm (connexion via la console)

    root@sirh:# sed -i "/^\taddress/ c\ /taddress 199.84.140.47" /etc/network/interfaces
    root@sirh:# echo "form-sirh" > /etc/hostname
    root@sirh:# sed -i "s/sirh/c\199.84.140.47\tform-sirh.auf.org sirh.auf.org form-sirh recrutement.auf.org form-recrutement.auf.org/" /etc/hosts
    root@sirh:# rm /etc/udev/rules.d/70-persistent-net.rules
    root@sirh:# poweroff

    (éventuellement /etc/resolv.conf aussi) . On arrête la vm à la fin

• on modifie son interface réseau (côté hôte) :

  root@super-tech:~# virsh dumpxml --inactive --security-info form-sirh > form-sirh.xml
  root@super-tech:~# sed -i "s#br_dmzrpv_102#br_dmzpub_101#" form-sirh.xml
  root@super-tech:# virsh define form-sirh.xml
  root@super-tech:# virsh start form-sirh

  et on relance la vm.
• adaptation (côté vm)

  • virer les cron

    root@form-sirh:~# sed -i -e '/adequasys/s|^|#|' /etc/cron.d/local-adequasys

  • Mod-mellon : accès pour Mathieu seul

    root@form-sirh:~# sed -E -i -e '/(mathieu.person|\[REG\])/! s|MellonCond|#MellonCond|' /etc/apache2/sites-available/sirh.auf.org-ssl.conf
    root@form-sirh:~# sed -i -e '/mathieu.person/s/\[OR\]//' /etc/apache2/sites-available/sirh.auf.org-ssl.conf

  • changer le nom serveur (mais pas les dossiers)

    root@form-sirh:~# sed -E -i -e '/(saml|srv\/www)/! s|sirh.auf.org|form-sirh.auf.org|' /etc/apache2/sites-available/sirh.auf.org-ssl.conf
    root@form-sirh:~# sed -i -e 's/PROD/FORM/' /etc/apache2/sites-available/sirh.auf.org-ssl.conf

  • relancer apache2