Juin 152011
attention, cette méthode comporte des risques, c’est à utiliser à vos risques et périls.
j’ai été obligé d’agrandir le système racine aujourd’hui … à chaud … ce qui n’est pas recommandé.
voici le détail de la méthode utilisée.
je casse le miroir pour pouvoir disposer d’un disque supplémentaire temporaire:
$ find /dev/vg00 -type b |while read i; do lvreduce -m 0 $i ; done Logical volume "/dev/vg00/lvol1" has been successfully reduced. Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf Logical volume "/dev/vg00/lvol2" has been successfully reduced. Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf Logical volume "/dev/vg00/lvol3" has been successfully reduced. Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf Logical volume "/dev/vg00/lvol4" has been successfully reduced. Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf Logical volume "/dev/vg00/lvol5" has been successfully reduced. Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf Logical volume "/dev/vg00/lvol6" has been successfully reduced. Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf Logical volume "/dev/vg00/lvol7" has been successfully reduced. Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf Logical volume "/dev/vg00/lvol8" has been successfully reduced. Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf
la difficulté vient du fait que le filesystème racine doit être contigu, c-a-d que tout ses extends doivent être dans la même lignée, la racine êtant /dev/vg00/lvol3, on va déplacer lvol4
$ vgdisplay -v vg00 |tail -n 20 LV Size (Mbytes) 4596 Current LE 1149 Allocated PE 1149 Used PV 1 --- Physical volumes --- PV Name /dev/dsk/c1t2d0 PV Status available Total PE 4340 Free PE 784 Autoswitch On PV Name /dev/dsk/c2t2d0 PV Status available Total PE 4340 Free PE 4340 Autoswitch On
on va faire un pvmove, pendant la commande, on peut voir sa progression en tapant:
lvdisplay -v /dev/vg00/lvol4 |awk '/dsk.*stale/,/^$/' |wc -l
$ pvmove -n /dev/vg00/lvol4 /dev/dsk/c1t2d0 /dev/dsk/c2t2d0 Transferring logical extents of logical volume "/dev/vg00/lvol4"... Physical volume "/dev/dsk/c1t2d0" has been successfully moved. Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf $ vgdisplay -v vg00 |tail -n 20 LV Size (Mbytes) 4596 Current LE 1149 Allocated PE 1149 Used PV 1 --- Physical volumes --- PV Name /dev/dsk/c1t2d0 PV Status available Total PE 4340 Free PE 2145 Autoswitch On PV Name /dev/dsk/c2t2d0 PV Status available Total PE 4340 Free PE 2979 Autoswitch On
une fois tout cela fait, on peut étendre / à 2Go
$ lvextend -L 2048 /dev/vg00/lvol3 Logical volume "/dev/vg00/lvol3" has been successfully extended. Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf $ fsadm -F vxfs -v -b 2097152 / vxfs fsadm: using device /dev/vg00/rlvol3 vxfs fsadm: /dev/vg00/rlvol3 is currently 204800 sectors - size will be increased
on re-move lvol4 sur le disque d’origine
$ pvmove -n /dev/vg00/lvol4 /dev/dsk/c2t2d0 /dev/dsk/c1t2d0 Transferring logical extents of logical volume "/dev/vg00/lvol4"... Physical volume "/dev/dsk/c2t2d0" has been successfully moved. Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf
on refait le miroir.
pour voir la progression du miroir lancer cette commande pendant le lvextend:
# find /dev/vg00 -type b |while read i ; do t=$(lvdisplay -v $i |awk '/dsk.*stale/,/^$/'|wc -l) ; echo ${i##*/} Stale: $t ; done
$ find /dev/vg00 -type b |while read i ; do lvextend -m 1 $i ; done The newly allocated mirrors are now being synchronized. This operation will take some time. Please wait .... Logical volume "/dev/vg00/lvol1" has been successfully extended. Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf The newly allocated mirrors are now being synchronized. This operation will take some time. Please wait .... Logical volume "/dev/vg00/lvol2" has been successfully extended. Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf The newly allocated mirrors are now being synchronized. This operation will take some time. Please wait .... Logical volume "/dev/vg00/lvol3" has been successfully extended. Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf The newly allocated mirrors are now being synchronized. This operation will take some time. Please wait .... Logical volume "/dev/vg00/lvol4" has been successfully extended. Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf The newly allocated mirrors are now being synchronized. This operation will take some time. Please wait .... Logical volume "/dev/vg00/lvol5" has been successfully extended. Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf The newly allocated mirrors are now being synchronized. This operation will take some time. Please wait .... Logical volume "/dev/vg00/lvol6" has been successfully extended. Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf The newly allocated mirrors are now being synchronized. This operation will take some time. Please wait .... Logical volume "/dev/vg00/lvol7" has been successfully extended. Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf The newly allocated mirrors are now being synchronized. This operation will take some time. Please wait .... Logical volume "/dev/vg00/lvol8" has been successfully extended. Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf
j’aurais pu éviter certaines étapes, ne pas faire sauter le miroir de tout les lvols par exemple, j’aurais aussi certainement pu éviter le dernier pvmove, les extends se seraient de toute façon synchronisés avec la recréation du miroir.