Editing Logical Volume Manager (Linux)
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| − | + | [[wikipedia:Logical_Volume_Manager_(Linux)|LVM]]<ref>http://man7.org/linux/man-pages/man8/lvm.8.html</ref> available in Linux allows manage multiple physical volumes or entire hard disks. It supports among other functionalities: | |
* Create single logical volumes of multiple physical volumes or entire hard disks | * Create single logical volumes of multiple physical volumes or entire hard disks | ||
* Add or remove volumes/disk dynamically | * Add or remove volumes/disk dynamically | ||
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* Create snapshots | * Create snapshots | ||
| − | LVM introduces the concept of | + | LVM introduces the concept of Volume Groups (VGs) and Logical Volumes (LVs). |
| − | + | Configuration file: <code>/etc/lvm/[[lvm.conf]]</code> | |
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* List Volume Groups:<code>[[vgs]]</code><ref>http://man7.org/linux/man-pages/man8/vgs.8.html</ref> | * List Volume Groups:<code>[[vgs]]</code><ref>http://man7.org/linux/man-pages/man8/vgs.8.html</ref> | ||
** <code>[[vgscan]]</code>, <code>[[vgextend]]</code>, <code>[[vgdisplay]]</code> | ** <code>[[vgscan]]</code>, <code>[[vgextend]]</code>, <code>[[vgdisplay]]</code> | ||
| − | * List logical volumes: <code>[[lvs]]</code><ref>http://man7.org/linux/man-pages/man8/lvs.8.html</ref>, [[lvdisplay]] | + | * List logical volumes: <code>[[lvs]]</code><ref>http://man7.org/linux/man-pages/man8/lvs.8.html</ref>, [[/lvdisplay/]] |
* Resize LV: | * Resize LV: | ||
** <code>[[lvresize]]</code> | ** <code>[[lvresize]]</code> | ||
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* Ls commands: <code>[[pvs]]</code>, <code>[[lvs]]</code><ref>http://man7.org/linux/man-pages/man8/lvs.8.html</ref>, <code>[[vgs]]</code> | * Ls commands: <code>[[pvs]]</code>, <code>[[lvs]]</code><ref>http://man7.org/linux/man-pages/man8/lvs.8.html</ref>, <code>[[vgs]]</code> | ||
* Scan commands: <code>[[pvscan]]</code><ref>http://man7.org/linux/man-pages/man8/pvscan.8.html</ref>, <code>[[vgscan]]</code> | * Scan commands: <code>[[pvscan]]</code><ref>http://man7.org/linux/man-pages/man8/pvscan.8.html</ref>, <code>[[vgscan]]</code> | ||
| − | * PV commands: <code>[[pvdisplay]]</code><ref>http://man7.org/linux/man-pages/man8/pvdisplay.8.html</ref>, <code>pvresize</code>, <code>[[pvscan]]</code>, <code>[[pvcreate]]</code> or <code>[[pvcreate]] -vv</code> | + | * PV commands: <code>[[pvdisplay]]</code><ref>http://man7.org/linux/man-pages/man8/pvdisplay.8.html</ref>, <code>pvresize</code>, <code>[[/pvscan/]]</code>, <code>[[pvcreate]]</code> or <code>[[pvcreate]] -vv</code> |
* LV commands: <code>[[lvcreate]]</code><ref>http://man7.org/linux/man-pages/man8/lvcreate.8.html</ref>, [[lvconvert]] | * LV commands: <code>[[lvcreate]]</code><ref>http://man7.org/linux/man-pages/man8/lvcreate.8.html</ref>, [[lvconvert]] | ||
| − | * VG commands: <code>[[vgdisplay]]</code>, <code>[[vgcreate]]</code>, <code> | + | * VG commands: <code>[[vgdisplay]]</code>, <code>[[vgcreate]]</code>, <code>vgcfgbackup</code>, <code>[[vgscan]]</code> |
* LVM commands: <code>[[lvm dumpconfig]]</code> | * LVM commands: <code>[[lvm dumpconfig]]</code> | ||
=== Advanced commands === | === Advanced commands === | ||
* <code>lvchange</code><ref>http://man7.org/linux/man-pages/man8/lvchange.8.html</ref> — Change attributes of the Logical Volume Manager. | * <code>lvchange</code><ref>http://man7.org/linux/man-pages/man8/lvchange.8.html</ref> — Change attributes of the Logical Volume Manager. | ||
| − | * <code>[[lvmdiskscan]]</code>. Deprecated: used <code>[[ | + | * <code>[[lvmdiskscan]]</code>. Deprecated: used <code>[[lvs]]</code>. Scan for all devices visible to LVM2. |
| − | * <code> | + | * <code>lvmdump</code> — Create lvm2 information dumps for diagnostic purposes. |
== Activities == | == Activities == | ||
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* {{LVM}} | * {{LVM}} | ||
* [[linux/mdadm|mdadm]] and [[Linux Administration/Devices and Filesystems/ZFS|ZFS]] | * [[linux/mdadm|mdadm]] and [[Linux Administration/Devices and Filesystems/ZFS|ZFS]] | ||
| − | * | + | * resize2fs<ref>https://manpages.debian.org/stretch/e2fsprogs/resize2fs.8.en.html</ref> file system resizer for ext2/ext3/ext4 (resize2fs /dev/mapper/VolGroup-lv_root) (for ext4 only).<ref>https://www.technomenace.com/2014/08/how-to-extend-lvm-on-qcow2-images/</ref>. Code: https://github.com/tytso/e2fsprogs/blob/master/resize/resize2fs.c |
| − | * [[Ansible]] LV module: https://docs.ansible.com/ansible/latest/modules/lvol_module.html#lvol-module | + | * [[DevOps/Ansible|Ansible]] LV module: https://docs.ansible.com/ansible/latest/modules/lvol_module.html#lvol-module |
| − | * | + | * [[dmsetup]] |
* [[UUID]] | * [[UUID]] | ||
| − | + | ||
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