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✨ Add extend-zfs-pool… notes (FR/EN)
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content/extend-zfs-pool-after-ubuntu-installation-en.md
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154
content/extend-zfs-pool-after-ubuntu-installation-en.md
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Title: Extend a ZFS root pool after Ubuntu installation
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Date: 2021-01-03 21:55
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Summary: 1st step after installing Ubuntu on ZFS
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Category: Bloc-notes
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Tags: zfs, ubuntu, admin, shell, cli, performance, logiciel libre,
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Status: Published
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Translation: true
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Lang: en
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Slug: extend-zfs-root-pool-after-ubuntu-installation
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Since [Eoan Ermine (Ubuntu 19.10)](https://ubuntu.com/blog/enhancing-our-zfs-support-on-ubuntu-19-10-an-introduction), Ubuntu installer (for desktop) can use [ZFS](https://github.com/openzfs/zfs) as root file-system.
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The current LTS, [Focal Fossa (Ubuntu 20.04)](https://ubuntu.com/blog/zfs-focus-on-ubuntu-20-04-lts-whats-new) provides only a mono-disk installation, here's how to enhance a mono-disk installation into a mirrored-disk installation to use data resilience provided by ZFS.
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🚧 _ZFS on root is still experimental_ 🚧
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🔧 Howto
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--------
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* `sda` is the disk used by installer
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* `sdb` is the disk we're going to add to create a mirror
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```
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user@focal:~$ lsblk -a
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NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
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sda 8:0 0 931,5G 0 disk
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├─sda1 8:1 0 513M 0 part
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├─sda2 8:2 0 1K 0 part
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├─sda5 8:5 0 2G 0 part [SWAP]
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├─sda6 8:6 0 2G 0 part
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└─sda7 8:7 0 927G 0 part
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sdb 8:16 0 931,5G 0 disk
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```
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```bash
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user@focal:~$ blkid
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/dev/sda1: UUID="BFE4-2413" TYPE="vfat" PARTUUID="f0771fca-01"
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/dev/sda5: UUID="42456868-afc5-4dea-8b73-11257b84890e" TYPE="swap" PARTUUID="f0771fca-05"
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/dev/sda6: LABEL="bpool" UUID="11578277722432725130" UUID_SUB="9520999198366150859" TYPE="zfs_member" PARTUUID="f0771fca-06"
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/dev/sda7: LABEL="rpool" UUID="13693210375688435814" UUID_SUB="8709443765040685487" TYPE="zfs_member" PARTUUID="f0771fca-07"
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```
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Ubuntu creates 2 [`pools`](https://www.freebsd.org/doc/handbook/zfs-term.html#zfs-term-pool) :
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1. `bpool` : containing boot _pool_
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1. `rpool` : containing root _pool_, with all file-system
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```bash
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user@focal:~$ zpool list
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NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT
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bpool 1,88G 91,2M 1,79G - - 0% 4% 1.00x ONLINE -
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rpool 920G 3,19G 917G - - 0% 0% 1.00x ONLINE -
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```
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```bash
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user@focal:~$ zpool status
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pool: bpool
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state: ONLINE
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scan: none requested
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config:
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NAME STATE READ WRITE CKSUM
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bpool ONLINE 0 0 0
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f0771fca-06 ONLINE 0 0 0
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errors: No known data errors
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pool: rpool
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state: ONLINE
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scan: none requested
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config:
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NAME STATE READ WRITE CKSUM
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rpool ONLINE 0 0 0
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f0771fca-07 ONLINE 0 0 0
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```
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Run `fdisk` to copy `sda` partition table to `sdb` using sfdisk compatible script files ([_see manpage_](https://manpages.ubuntu.com/manpages/focal/en/man8/fdisk.8.html#script%20files)).
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```bash
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user@focal:~$ fdisk /dev/sda #copy to file with O
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user@focal:~$ fdisk /dev/sdb #import from file with I
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```
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```bash
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user@focal:~$ lsblk -a
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NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
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sda 8:0 0 931,5G 0 disk
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├─sda1 8:1 0 513M 0 part
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├─sda2 8:2 0 1K 0 part
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├─sda5 8:5 0 2G 0 part [SWAP]
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├─sda6 8:6 0 2G 0 part
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└─sda7 8:7 0 927G 0 part
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sdb 8:16 0 931,5G 0 disk
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├─sdb1 8:17 0 513M 0 part
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├─sdb2 8:18 0 1K 0 part
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├─sdb5 8:21 0 2G 0 part
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├─sdb6 8:22 0 2G 0 part
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└─sdb7 8:23 0 927G 0 part
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```
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[Attach](https://www.freebsd.org/doc/handbook/zfs-zpool.html#zfs-zpool-attach) the twin partitions on pools :
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```bash
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user@focal:~$ sudo zpool attach bpool f0771fca-06 /dev/sdb6
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user@focal:~$ sudo zpool attach rpool f0771fca-07 /dev/sdb7
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```
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🎉 Tada!
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```bash
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user@focal:~$ zpool status
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pool: bpool
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state: ONLINE
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scan: resilvered 92,2M in 0 days 00:00:01 with 0 errors on Sun Jan 3 22:22:09 2021
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config:
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NAME STATE READ WRITE CKSUM
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bpool ONLINE 0 0 0
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mirror-0 ONLINE 0 0 0
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f0771fca-06 ONLINE 0 0 0
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sdb6 ONLINE 0 0 0
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errors: No known data errors
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pool: rpool
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state: ONLINE
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scan: resilvered 4,05G in 0 days 00:01:06 with 0 errors on Sun Jan 3 22:24:05 2021
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remove: Removal of vdev 1 copied 3,36M in 0h0m, completed on Sun Jan 3 21:14:16 2021
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456 memory used for removed device mappings
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config:
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NAME STATE READ WRITE CKSUM
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rpool ONLINE 0 0 0
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mirror-0 ONLINE 0 0 0
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f0771fca-07 ONLINE 0 0 0
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sdb7 ONLINE 0 0 0
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errors: No known data errors
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```
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---
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🔖 References
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-------------
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1. [_ZFS Features and Terminology_](https://www.freebsd.org/doc/handbook/zfs-term.html) - `www.freebsd.org`
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1. [_The Z File System (ZFS)_](https://www.freebsd.org/doc/handbook/zfs-quickstart.html) - `www.freebsd.org`
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1. [_OpenZFS_](https://github.com/openzfs/zfs) - `github.com`
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1. [_Enhancing our ZFS support on Ubuntu 19.10 – an introduction_](https://ubuntu.com/blog/enhancing-our-zfs-support-on-ubuntu-19-10-an-introduction) - `ubuntu.com`
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1. [_ZFS focus on Ubuntu 20.04 LTS: what’s new?_]() - `ubuntu.com`
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1. [_zpool manpage_](https://manpages.ubuntu.com/manpages/focal/en/man8/zpool.8.html) - `manpages.ubuntu.com`
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1. [_zfs manpage_](https://manpages.ubuntu.com/manpages/focal/en/man8/zfs.8.html) - `manpages.ubuntu.com`
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156
content/extend-zfs-pool-after-ubuntu-installation.md
Normal file
156
content/extend-zfs-pool-after-ubuntu-installation.md
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@ -0,0 +1,156 @@
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Title: Étendre une «pool» ZFS racine après une installation Ubuntu
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Date: 2021-01-03 21:55
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Summary: 1ère étape après une installation d'Ubuntu sur ZFS
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Category: Bloc-notes
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Tags: zfs, ubuntu, admin, shell, cli, performance, logiciel libre,
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Status: Published
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Translation: true
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Lang: fr
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Slug: extend-zfs-root-pool-after-ubuntu-installation
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Depuis [Eoan Ermine (Ubuntu 19.10)](https://ubuntu.com/blog/enhancing-our-zfs-support-on-ubuntu-19-10-an-introduction), l'installeur Ubuntu (pour _desktop_) peut utiliser [ZFS](https://github.com/openzfs/zfs) comme système de fichier racine.
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La version LTS du moment, [Focal Fossa (Ubuntu 20.04)](https://ubuntu.com/blog/zfs-focus-on-ubuntu-20-04-lts-whats-new) propose seulement une installation mono-disque, voici comment transformer une installation mono-disque en une installation à _disques miroirs_ pour utiliser la résilience des données fournie par ZFS.
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🚧 _ZFS on root reste expérimental_ 🚧
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🔧 Mode d'emploi
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----------------
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* `sda` est le disque utilisé par l'installeur
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* `sdb` est le disque que l'on va ajouter pour créer un miroir
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```
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user@focal:~$ lsblk -a
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NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
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sda 8:0 0 931,5G 0 disk
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├─sda1 8:1 0 513M 0 part
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├─sda2 8:2 0 1K 0 part
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├─sda5 8:5 0 2G 0 part [SWAP]
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├─sda6 8:6 0 2G 0 part
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└─sda7 8:7 0 927G 0 part
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sdb 8:16 0 931,5G 0 disk
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```
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```bash
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user@focal:~$ blkid
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/dev/sda1: UUID="BFE4-2413" TYPE="vfat" PARTUUID="f0771fca-01"
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/dev/sda5: UUID="42456868-afc5-4dea-8b73-11257b84890e" TYPE="swap" PARTUUID="f0771fca-05"
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/dev/sda6: LABEL="bpool" UUID="11578277722432725130" UUID_SUB="9520999198366150859" TYPE="zfs_member" PARTUUID="f0771fca-06"
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/dev/sda7: LABEL="rpool" UUID="13693210375688435814" UUID_SUB="8709443765040685487" TYPE="zfs_member" PARTUUID="f0771fca-07"
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```
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Ubuntu crée 2 [`pools`](https://www.freebsd.org/doc/handbook/zfs-term.html#zfs-term-pool) :
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1. `bpool` : coontient la _pool_ de `boot`
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1. `rpool` : contient la _pool_ avec tout le système de fichier
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```bash
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user@focal:~$ zpool list
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NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT
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bpool 1,88G 91,2M 1,79G - - 0% 4% 1.00x ONLINE -
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rpool 920G 3,19G 917G - - 0% 0% 1.00x ONLINE -
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```
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```bash
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user@focal:~$ zpool status
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pool: bpool
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state: ONLINE
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scan: none requested
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config:
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NAME STATE READ WRITE CKSUM
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bpool ONLINE 0 0 0
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f0771fca-06 ONLINE 0 0 0
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errors: No known data errors
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pool: rpool
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state: ONLINE
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scan: none requested
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config:
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NAME STATE READ WRITE CKSUM
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rpool ONLINE 0 0 0
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f0771fca-07 ONLINE 0 0 0
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```
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Lancer `fdisk` pour copier la table de partition de `sda` vers `sdb` avec un fichier de script compatible `sfdisk` ([_voir la page de manuel_](https://manpages.ubuntu.com/manpages/focal/en/man8/fdisk.8.html#script%20files)).
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```bash
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user@focal:~$ fdisk /dev/sda #copy to file with O
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user@focal:~$ fdisk /dev/sdb #import from file with I
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```
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```bash
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user@focal:~$ lsblk -a
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NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
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sda 8:0 0 931,5G 0 disk
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├─sda1 8:1 0 513M 0 part
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├─sda2 8:2 0 1K 0 part
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├─sda5 8:5 0 2G 0 part [SWAP]
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├─sda6 8:6 0 2G 0 part
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└─sda7 8:7 0 927G 0 part
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sdb 8:16 0 931,5G 0 disk
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├─sdb1 8:17 0 513M 0 part
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├─sdb2 8:18 0 1K 0 part
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├─sdb5 8:21 0 2G 0 part
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├─sdb6 8:22 0 2G 0 part
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└─sdb7 8:23 0 927G 0 part
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```
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[Attacher](https://www.freebsd.org/doc/handbook/zfs-zpool.html#zfs-zpool-attach) les partitions jumelles a leur _pool_ :
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```bash
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user@focal:~$ sudo zpool attach bpool f0771fca-06 /dev/sdb6
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user@focal:~$ sudo zpool attach rpool f0771fca-07 /dev/sdb7
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```
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🎉 Tada!
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```bash
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user@focal:~$ zpool status
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pool: bpool
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state: ONLINE
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scan: resilvered 92,2M in 0 days 00:00:01 with 0 errors on Sun Jan 3 22:22:09 2021
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config:
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NAME STATE READ WRITE CKSUM
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bpool ONLINE 0 0 0
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mirror-0 ONLINE 0 0 0
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f0771fca-06 ONLINE 0 0 0
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sdb6 ONLINE 0 0 0
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errors: No known data errors
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pool: rpool
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state: ONLINE
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scan: resilvered 4,05G in 0 days 00:01:06 with 0 errors on Sun Jan 3 22:24:05 2021
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remove: Removal of vdev 1 copied 3,36M in 0h0m, completed on Sun Jan 3 21:14:16 2021
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456 memory used for removed device mappings
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config:
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NAME STATE READ WRITE CKSUM
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rpool ONLINE 0 0 0
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mirror-0 ONLINE 0 0 0
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f0771fca-07 ONLINE 0 0 0
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sdb7 ONLINE 0 0 0
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errors: No known data errors
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```
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---
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🔖 Références
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-------------
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1. [_ZFS Features and Terminology_](https://www.freebsd.org/doc/handbook/zfs-term.html) - `www.freebsd.org`
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1. [_The Z File System (ZFS)_](https://www.freebsd.org/doc/handbook/zfs-quickstart.html) - `www.freebsd.org`
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1. [_OpenZFS_](https://github.com/openzfs/zfs) - `github.com`
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1. [_Enhancing our ZFS support on Ubuntu 19.10 – an introduction_](https://ubuntu.com/blog/enhancing-our-zfs-support-on-ubuntu-19-10-an-introduction) - `ubuntu.com`
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1. [_ZFS focus on Ubuntu 20.04 LTS: what’s new?_]() - `ubuntu.com`
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1. [_zpool manpage_](https://manpages.ubuntu.com/manpages/focal/en/man8/zpool.8.html) - `manpages.ubuntu.com`
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1. [_zfs manpage_](https://manpages.ubuntu.com/manpages/focal/en/man8/zfs.8.html) - `manpages.ubuntu.com`
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