Bonjour,
Mon serveur a mal supporté la mise à jour vers la dernière version d'ubuntu.
Je suis parvenu à reprendre la main grâce au mode rescue.
En montant /dev/md2 je retrouve l'accès à ce qui était le répertoire /home dans mon système.
J'espérais en montant /dev/md1 retrouver le reste de mon système et en particulier le dossier /root dans lequel j'avais des informations importantes : hélas, il est vide.
J'ai donc plusieurs questions :
- comment accéder au dossier root de mon système originel?
- comment conserver le contenu de la partition /dev/md2 et le contenu du répertoire root originel lors d'une réinstallation du serveur?
Merci votre aide.
Cordiales salutations.
Récupérer des données en mode rescue
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Bonjour,
Pouvez-vous nous donner la sortie des commandes suivantes SVP ?
Dans le cas d'une réinstallation par notre système, vous perdres /home. Il est possible de réinstaller manuellement Ubuntu depuis le rescue sans perdre /home mais c'est plus compliqué. Voyons déjà ce que donnent ces commandes.
Merci beaucoup pour cette prompte réponse, voici le résultat de ces commandes (la réponse à lvs est vide) :
-------------------------------------------------------------------------------------------------
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 0 465.8G 0 disk
├─sda1 8:1 0 19.5G 0 part
│ └─md1 9:1 0 19.5G 0 raid1 /sos
├─sda2 8:2 0 445.7G 0 part
│ └─md2 9:2 0 445.7G 0 raid1
└─sda3 8:3 0 511M 0 part
sdb 8:16 0 465.8G 0 disk
├─sdb1 8:17 0 19.5G 0 part
│ └─md1 9:1 0 19.5G 0 raid1 /sos
├─sdb2 8:18 0 445.7G 0 part
│ └─md2 9:2 0 445.7G 0 raid1
└─sdb3 8:19 0 511M 0 part
nbd0 43:0 0 0B 0 disk
nbd1 43:32 0 0B 0 disk
nbd2 43:64 0 0B 0 disk
nbd3 43:96 0 0B 0 disk
nbd4 43:128 0 0B 0 disk
nbd5 43:160 0 0B 0 disk
nbd6 43:192 0 0B 0 disk
nbd7 43:224 0 0B 0 disk
nbd8 43:256 0 0B 0 disk
nbd9 43:288 0 0B 0 disk
nbd10 43:320 0 0B 0 disk
nbd11 43:352 0 0B 0 disk
nbd12 43:384 0 0B 0 disk
nbd13 43:416 0 0B 0 disk
nbd14 43:448 0 0B 0 disk
nbd15 43:480 0 0B 0 disk
-------------------------------------------------------------------------------------------
# lsblk -f
NAME FSTYPE FSVER LABEL UUID FSAVAIL FSUSE% MOUNTPOINTS
sda
├─sda1
│ linux_ 0.90. fc58b35f-d15c-0117-a4d2-adc226fd5302
│ └─md1
│ ext4 1.0 d16884bf-48f6-4af8-93e5-a587e27655ea 8.1G 52% /sos
├─sda2
│ linux_ 0.90. 8da606ee-9d83-6ace-a4d2-adc226fd5302
│ └─md2
│ ext4 1.0 5177a6c0-e0dc-493a-83fd-fe68eeb0b135
└─sda3
swap 1 swap-sda3
f7d66a47-227f-433a-bfb1-4ece96c8da51
sdb
├─sdb1
│ linux_ 0.90. fc58b35f-d15c-0117-a4d2-adc226fd5302
│ └─md1
│ ext4 1.0 d16884bf-48f6-4af8-93e5-a587e27655ea 8.1G 52% /sos
├─sdb2
│ linux_ 0.90. 8da606ee-9d83-6ace-a4d2-adc226fd5302
│ └─md2
│ ext4 1.0 5177a6c0-e0dc-493a-83fd-fe68eeb0b135
└─sdb3
swap 1 swap-sdb3
33d74ba0-83be-490c-ac45-91083c7bc25a
nbd0
nbd1
nbd2
nbd3
nbd4
nbd5
nbd6
nbd7
nbd8
nbd9
nbd10
nbd11
nbd12
nbd13
nbd14
nbd15
-------------------------------------------------------------------------------------
# lvs
-------------------------------------------------------------------------------------
Vous avez monté /dev/md1 dans /sos, il semble rempli à moitié, ce n'est pas votre racine ?
Que donne
find /sos? Ça ne renvoie pas de /sos/root par exemple ?Voici le contenu de root , hélas il n'a pas le contenu attendu (en particulier des scripts shell ).
Ce qui me surprend, c'est que
# find /sos/root
/sos/root
/sos/root/.bash_history
/sos/root/.cache
/sos/root/.cache/motd.legal-displayed
/sos/root/.local
/sos/root/.local/share
/sos/root/.local/share/flatpak
/sos/root/.local/share/flatpak/repo
/sos/root/.local/share/flatpak/repo/extensions
/sos/root/.local/share/flatpak/repo/objects
/sos/root/.local/share/flatpak/repo/state
/sos/root/.local/share/flatpak/repo/tmp
/sos/root/.local/share/flatpak/repo/tmp/cache
/sos/root/.local/share/flatpak/repo/refs
/sos/root/.local/share/flatpak/repo/refs/mirrors
/sos/root/.local/share/flatpak/repo/refs/heads
/sos/root/.local/share/flatpak/repo/refs/remotes
/sos/root/.local/share/flatpak/repo/config
/sos/root/.local/share/flatpak/.changed
Vous n'aviez pas un autre montage dans /root à tout hasard ? Que contient /sos/etc/fstab ?
Si vous avez l'historique, vous devez pouvoir retrouver les chemins exacts des scripts appelés ?
J'avais pensé à ce possible montage, mais fstab m'a montré que ce n'est pas le cas.
Je cois qu'il faut que je renonce à retrouver le contenu de root.
J'envisage de sauver provisoirement ce que je peux et qui m'intéresse de smb1 sur smb2, puis procéder à une réinstallation.
Pensez-vous que smb2 risque d'être affecté par la réinstallation?
# cat /sos/etc/fstab
# <file system> <mount point> <type> <options> <dump> <pass>
/dev/md1 / ext4 errors=remount-ro,relatime 0 1
/dev/md2 /home ext4 defaults,relatime 1 2
/dev/sda3 swap swap defaults 0 0
/dev/sdb3 swap swap defaults 0 0
proc /proc proc defaults 0 0
sysfs /sys sysfs defaults 0 0
devtmpfs /dev devtmpfs rw 0 0
La réinstallation va effacer tous les disques.
Qu'est-ce qui est cassé actuellement sur la machine ? Est-ce que le RAID est dans un état normal ? Le bootloader est-il bien installé ? Vous avez un KVM pour voir ce qui se passe au boot ? Même sans KVM, vous pouvez regarder les logs dans /var/log si la machine commence à démarrer.
Oups, cela commence à me dépasser, j'ignore ce qu'est un KVM...
Parlez-vous du /var/log tel qu'il est en mode rescue? le voici :
# find /var/log
/var/log
/var/log/alternatives.log
/var/log/dpkg.log
/var/log/apt
/var/log/apt/eipp.log.xz
/var/log/apt/history.log
/var/log/apt/term.log
/var/log/cloud-init.log
/var/log/cloud-init-output.log
/var/log/oco
/var/log/oco/oco.log
/var/log/oco/oco.log.1
/var/log/oco/system-read-only
/var/log/lastlog
/var/log/btmp
/var/log/wtmp
/var/log/private
/var/log/README
Pour le KVM : https://help.ovhcloud.com/csm/en-dedicated-servers-ipmi?id=kb_article_view&sysparm_article=KB0044037
Pour /var/log, je veux dire /sos/var/log qui contient les logs sur disque. Si vous n'êtes pas à l'aise avec tout ça, il vaut en effet mieux réinstaller le système.
Mais, si je comprends bien, réinstaller le système, c'est perdre le contenu de /dev/md2...
Si j'ai bien compris, réinitialiser le système, c'est en tout cas perdre /dev/md2.
Voici /sos/var/log, au cas où il vous parlerait :
find /sos/var/log
/sos/var/log
/sos/var/log/apport.log
/sos/var/log/syslog.4.gz
/sos/var/log/dmesg
/sos/var/log/ubuntu-advantage.log.3.gz
/sos/var/log/dmesg.3.gz
/sos/var/log/dpkg.log.6.gz
/sos/var/log/dpkg.log.1
/sos/var/log/boot.log.1
/sos/var/log/wtmp
/sos/var/log/alternatives.log
/sos/var/log/btmp.1
/sos/var/log/alternatives.log.1
/sos/var/log/wtmp.1
/sos/var/log/dpkg.log.4.gz
/sos/var/log/faillog
/sos/var/log/kern.log.1
/sos/var/log/syslog.7.gz
/sos/var/log/dpkg.log.12.gz
/sos/var/log/auth.log.2.gz
/sos/var/log/ubuntu-advantage.log.6.gz
/sos/var/log/syslog
/sos/var/log/kern.log.2.gz
/sos/var/log/fontconfig.log
/sos/var/log/boot.log
/sos/var/log/kern.log.4.gz
/sos/var/log/dpkg.log.10.gz
/sos/var/log/kern.log
/sos/var/log/ubuntu-advantage.log.5.gz
/sos/var/log/btmp
/sos/var/log/alternatives.log.7.gz
/sos/var/log/syslog.1
/sos/var/log/dmesg.2.gz
/sos/var/log/dpkg.log.2.gz
/sos/var/log/dpkg.log.3.gz
/sos/var/log/dpkg.log.5.gz
/sos/var/log/dpkg.log.7.gz
/sos/var/log/syslog.6.gz
/sos/var/log/auth.log.4.gz
/sos/var/log/dpkg.log
/sos/var/log/alternatives.log.10.gz
/sos/var/log/syslog.2.gz
/sos/var/log/dpkg.log.8.gz
/sos/var/log/bootstrap.log
/sos/var/log/alternatives.log.8.gz
/sos/var/log/alternatives.log.2.gz
/sos/var/log/alternatives.log.9.gz
/sos/var/log/dmesg.4.gz
/sos/var/log/auth.log.1
/sos/var/log/private
/sos/var/log/alternatives.log.6.gz
/sos/var/log/dpkg.log.9.gz
/sos/var/log/apt
/sos/var/log/apt/term.log
/sos/var/log/apt/history.log.9.gz
/sos/var/log/apt/term.log.2.gz
/sos/var/log/apt/eipp.log.xz
/sos/var/log/apt/term.log.1.gz
/sos/var/log/apt/history.log.4.gz
/sos/var/log/apt/term.log.12.gz
/sos/var/log/apt/term.log.8.gz
/sos/var/log/apt/term.log.10.gz
/sos/var/log/apt/history.log.5.gz
/sos/var/log/apt/term.log.7.gz
/sos/var/log/apt/history.log
/sos/var/log/apt/term.log.9.gz
/sos/var/log/apt/history.log.10.gz
/sos/var/log/apt/history.log.11.gz
/sos/var/log/apt/term.log.4.gz
/sos/var/log/apt/history.log.7.gz
/sos/var/log/apt/history.log.3.gz
/sos/var/log/apt/term.log.11.gz
/sos/var/log/apt/history.log.12.gz
/sos/var/log/apt/history.log.8.gz
/sos/var/log/apt/term.log.3.gz
/sos/var/log/apt/history.log.6.gz
/sos/var/log/apt/term.log.6.gz
/sos/var/log/apt/term.log.5.gz
/sos/var/log/apt/history.log.1.gz
/sos/var/log/apt/history.log.2.gz
/sos/var/log/kern.log.3.gz
/sos/var/log/ubuntu-advantage.log.4.gz
/sos/var/log/alternatives.log.3.gz
/sos/var/log/fsck
/sos/var/log/fsck/checkroot
/sos/var/log/fsck/checkfs
/sos/var/log/dmesg.0
/sos/var/log/upgrade
/sos/var/log/upgrade/telemetry
/sos/var/log/journal
/sos/var/log/journal/6e2a1e31ee37f277492b6c57534d5442
/sos/var/log/journal/6e2a1e31ee37f277492b6c57534d5442/system@d1ee14edffee4af0a448fbe454838115-0000000005ae6f97-000638360e7156ec.journal
/sos/var/log/journal/6e2a1e31ee37f277492b6c57534d5442/system@d1ee14edffee4af0a448fbe454838115-0000000005af27ed-000638368468a799.journal
/sos/var/log/journal/6e2a1e31ee37f277492b6c57534d5442/system@d1ee14edffee4af0a448fbe454838115-0000000005ada1ca-00063835d4dc6508.journal
/sos/var/log/journal/6e2a1e31ee37f277492b6c57534d5442/system@d1ee14edffee4af0a448fbe454838115-0000000005aab03b-00063834c8f88efd.journal
/sos/var/log/journal/6e2a1e31ee37f277492b6c57534d5442/system@d1ee14edffee4af0a448fbe454838115-0000000005aa6b1f-00063834b49cb13c.journal
/sos/var/log/journal/6e2a1e31ee37f277492b6c57534d5442/system@d1ee14edffee4af0a448fbe454838115-0000000005ad5d94-00063835c8236a23.journal
/sos/var/log/journal/6e2a1e31ee37f277492b6c57534d5442/system@d1ee14edffee4af0a448fbe454838115-0000000005af5607-00063836b612713a.journal
/sos/var/log/journal/6e2a1e31ee37f277492b6c57534d5442/system@d1ee14edffee4af0a448fbe454838115-0000000005af6d04-00063836ca887446.journal
/sos/var/log/journal/6e2a1e31ee37f277492b6c57534d5442/system@d1ee14edffee4af0a448fbe454838115-0000000005ac4cc3-0006383595bbaf8b.journal
/sos/var/log/journal/6e2a1e31ee37f277492b6c57534d5442/system.journal
/sos/var/log/journal/6e2a1e31ee37f277492b6c57534d5442/system@d1ee14edffee4af0a448fbe454838115-0000000005aff756-000638373feeed66.journal
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/sos/var/log/journal/6e2a1e31ee37f277492b6c57534d5442/system@d1ee14edffee4af0a448fbe454838115-0000000005ac90fb-00063835a2809d90.journal
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/sos/var/log/journal/6e2a1e31ee37f277492b6c57534d5442/user-1002.journal
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root@rescue12-customer-eu (ns3300002.ip-178-32-217.eu) ~ #
Il faudrait regarder tous les logs dans /var/log, notamment messages.
Je viens de voir le nom de votre serveur, il n'a pas de KVM donc vous ne pourrez pas regarder ce qui se passe au boot.
Est-ce que le log contient des messages datant d'après votre mise à jour ? Si oui, le serveur démarre mais ne fonctionne pas totalement. Si non, le serveur ne démarre plus du tout, auquel cas il faut possiblement réparer/réinstaller GRUB.