How to configure linux LVM partition Management
How to configure linux LVM partition Management
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LVM is used for the following purposes: Creating single logical volumes of multiple physical volumes or entire hard disks (somewhat similar to RAID 0, but more similar to JBOD), allowing for dynamic volume resizing. Managing large hard disk farms by allowing disks to be added and replaced without downtime or service disruption, in combination with hot swapping. On small systems (like a desktop), instead of having to estimate at installation time how big a partition might need to be, LVM allows filesystems to be easily resized as needed. Performing consistent backups by taking snapshots of the logical volumes. Encrypting multiple physical partitions with one password. LVM can be considered as a thin software layer on top of the hard disks and partitions, which creates an abstraction of continuity and ease-of-use for managing hard drive replacement, repartitioning and backup. Lab: Application = systemtools = Vritual Machine Manager desktopX# virsh snapshot-revert serverX rh200 LVM (Logical Volume Manager) Storage: = Local (Limited) - HDD = Network (Unilimited)- SAN [root@localhost ~]# fdisk -l [root@localhost ~]# fdisk /dev/vda Command (m for help): n Select (default e): e Selected partition 4 First sector (12314624-16777215, default 12314624): {Press Enter} Using default value 12314624 Last sector, +sectors or +size{K, M,G} (12314624-16777215, default 16777215): {Press Enter} Using default value 16777215 Partition 4 of type Extended Command (m for help): p Command (m for help): n First sector (902815744-976771071, default 902815744): [press Enter] Last ... +size{K,M,G} (902815744-976771071, default 976771071): +250M Command (m for help): p Command (m for help): t Command (m for help): Enter your patition no Command (m for help): l Command (m for help): 8e Command (m for help): p Command (m for help): w Note: Do 2 more parttion for LVM [root@localhost ~]# lsblk [root@localhost ~]# partprobe /dev/vda Physical Volume Create: [root@localhost ~]# pvcreate /dev/vda5 [root@localhost ~]# pvcreate /dev/vda6 [root@localhost ~]# pvcreate /dev/vda7 [root@localhost ~]# pvdisplay Group Volume Create: [root@localhost ~]# vgcreate vg1 /dev/vda5 /dev/vda6 /dev/vda7 [root@localhost ~]# vgdisplay Logical Volume Create: [root@localhost ~]# lvcreate -n lv1 -L 400M vg1 or (note: Defautl PE Size 4MiB) [root@localhost ~]# lvcreate -n lv1 -l 100 vg1 [root@localhost ~]# lvdisplay [root@localhost ~]# mkfs.xfs /dev/vg1/lv1 [root@localhost ~]# mkdir /lvdata [root@localhost ~]# mount /dev/vg1/lv1 /lvdata [root@localhost ~]# df -HT [root@localhost ~]# Parmanent Mount: [root@localhost ~]# vim /etc/fstab /dev/vg1/lv1 /lvdata xfs defaults 0 0 [root@localhost ~]# mount -a [root@localhost ~]# mount VG Extended: = fdisk /dev/vda (300 MB) = partprobe /dev/vda [root@localhost ~]# pvcreate /dev/vda8 = vgextend [root@localhost ~]# vgextend vg1 /dev/vda8 [root@localhost ~]# vgdisplay = lvextend [root@localhost ~]# lvextend -L +100M /dev/vg1/lv1 [root@localhost ~]# df -HT [root@localhost ~]# xfs_growfs /lvdata [root@localhost ~]# df -HT Lv remove: [root@localhost ~]# vim /etc/fstab ;remove fstab entery [root@localhost ~]# umount /lvdata [root@localhost ~]# lvremove /dev/vg1/lv1 VG Remove: [root@localhost ~]# vgremove vg1 PV Remove: [root@localhost ~]# pvremove /dev/vda5 [root@localhost ~]# pvremove /dev/vda6 [root@localhost ~]# pvremove /dev/vda7 [root@localhost ~]# pvremove /dev/vda8 [root@localhost ~]# fdisk /dev/vda Command (m for help): d Partition number (1-8, default 8): 4 Command (m for help): w [root@localhost ~]# partprobe /dev/vda [root@localhost ~]# fdisk -l /dev/vda1 /dev/vda2 /dev/vda3 [root@localhost ~]# reboot ================ Done ================= #Linux #Mail Server #DNS Server #Postfix #Linux_Installation #Configuration #Mail_Archive #PXE_SERVER #Linux_advanced_Command #Linux_beginner