comment upgrader un serveur avec NIM alternate install

Creation: 11 fevrier 2015
Mise à jour:
Version: 1.0
Author: Jean-Louis Bicquelet-Salaün
Location: http://jlbicquelet.free.fr
Copyright: (c) 2015 Jean-Louis BICQUELET-SALAÜN

nimadm et alternate_disk

Avec NIM il est possible de migrer un serveur AIX en fonctionnement vers un niveau supérieur d'AIX et d'activer le nouveau système en un seul reboot.

On peut ainsi faire en une seule fois un upgrade de AIX 5.3 en AIX 6.1 ou d'AIX 6.1 en AIX 7.1.

Il faut disposer pour cela d'un disque supplémentaire de taille suffisante.

préparer l'alternate disk

  1. rechercher le serveur et vérifier sa configuration 

      #lsnim -c machines |grep serveur
serveur01           machines       standalone

 #lsnim -l serveur01
serveur01:
   class          = machines
   type           = standalone
   connect        = nimsh
   comments       = site=vega_lune_noire
   current_master = serveur01
   sync_required  = yes
   platform       = chrp
   netboot_kernel = mp
   if1            = ent-NetworkAdminMon serveur01 0AA92CCC4402 ent0
   net_settings1  = 1000 full
   cable_type1    = N/A
   Cstate         = ready for a NIM operation
   prev_state     = not running
   Mstate         = currently running
   cpuid          = 00F8A8444C00
   Cstate_result  = reset

  2. rechercher le spot correspondant à la version que l'on veut installer. Dans les normes on a souvent des définitions de spot qui ressemble à ceci:

    • spot53TL12SP09
    • spot61TL9SP2
    • spot71TL3SP3

    On peut ainsi faire un grep sur la version d'AIX et trier 

    #lsnim -t spot |grep 61 | sort
spot61TL4SP7               resources       spot
spot61TL5SP3               resources       spot
spot61TL6SP5               resources       spot
spot61TL5SP5               resources       spot
spot61TL6SP6               resources       spot
spot61TL7SP4               resources       spot
spot61TL7SP5               resources       spot
spot61TL7SP6               resources       spot
spot61TL8SP2               resources       spot
spot61TL9SP2               resources       spot

    On fait de même pour les lpp sources 

    #lsnim -t lpp_source |grep 61 |sort
gawk_61                 resources       lpp_source
lpp_source61TL4SP7      resources       lpp_source
lpp_source61TL5SP3      resources       lpp_source
lpp_source61TL5SP5      resources       lpp_source
lpp_source61TL6SP5      resources       lpp_source
lpp_source61TL6SP6      resources       lpp_source
lpp_source61TL7SP4      resources       lpp_source
lpp_source61TL7SP5      resources       lpp_source
lpp_source61TL7SP6      resources       lpp_source
lpp_source61TL8SP2      resources       lpp_source
lpp_source61TL9SP2      resources       lpp_source
lppsource61_PI          resources       lpp_source

Nous disposons de toutes les informations necessaires. Nous pouvons lancer l'installation de l'alternate disk.

lancement de l'alternate disk

  1. vérification de l'état du serveur à partir du serveur NIM 

    #lsnim -l serveur01

  2. lancement de l'alternate disk. 

    /usr/sbin/nimadm -H -c'serveur01' -l'lpp_source61TL9SP2' -s'spot61TL9SP2' -d'hdisk2' -Y -j nimadmvg

    L'option -Y correspond à l'acceptation des nouvelles licences. 

    #lsnim -l serveur01
serveur01:
   class          = machines
   type           = standalone
   locked         = 16253328
   connect        = nimsh
   comments       = site=vega_lune_noire
   current_master = sxpnim01
   sync_required  = yes
   platform       = chrp
   netboot_kernel = mp
   if1            = ent-NetworkAdminMon serveur01 0AA92CCC4402 ent0
   net_settings1  = 1000 full
   cable_type1    = N/A
   Cstate         = alt_disk_mig operation is being performed
   prev_state     = ready for a NIM operation
   Mstate         = currently running
   lpp_source     = lpp_source61TL9SP2
   spot           = spot61TL9SP2
   cpuid          = 00F844444C00
   control        = master
   Cstate_result  = reset

    Sur le serveur NIM on voit le processus d'installation de dique alterné 

    
Initializing the NIM master.
Initializing NIM client serveur01.
warning: warning: 0042-521 m_ckmac: The mgmt_profile attribute is not set for the serveur01 object.


Verifying alt_disk_migration eligibility.
Initializing log: /var/adm/ras/alt_mig/serveur01_alt_mig.log
Starting Alternate Disk Migration.

+-----------------------------------------------------------------------------+
Executing nimadm phase 1.
+-----------------------------------------------------------------------------+
Cloning altinst_rootvg on client, Phase 1.
Client alt_disk_install command: alt_disk_copy -j -M 6.1 -P1 -d "hdisk2"
Calling mkszfile to create new /image.data file.
Checking disk sizes.
Creating cloned rootvg volume group and associated logical volumes.
Creating logical volume alt_hd5
Creating logical volume alt_hd6
Creating logical volume alt_hd8
Creating logical volume alt_hd4
Creating logical volume alt_hd2
Creating logical volume alt_hd9var
Creating logical volume alt_hd3
Creating logical volume alt_hd


+-----------------------------------------------------------------------------+
Executing nimadm phase 2.
+-----------------------------------------------------------------------------+
Creating nimadm cache file systems on volume group nimadmvg.
Checking for initial required migration space.
Creating cache file system /serveur01_alt/alt_inst
Creating cache file system /serveur01_alt/alt_inst/admin
Creating cache file system /serveur01_alt/alt_inst/home
Creating cache file system /serveur01_alt/alt_inst/opt



+-----------------------------------------------------------------------------+
Executing nimadm phase 3.
+-----------------------------------------------------------------------------+
Syncing client data to cache ...


+-----------------------------------------------------------------------------+
Executing nimadm phase 7.
+-----------------------------------------------------------------------------+
nimadm: There is no user customization script specified for this phase.

+-----------------------------------------------------------------------------+
Executing nimadm phase 8.
+-----------------------------------------------------------------------------+
Creating client boot image.
bosboot: Boot image is 55296 512 byte blocks.
Writing boot image to client's alternate boot disk hdisk2.

+-----------------------------------------------------------------------------+
Executing nimadm phase 9.
+-----------------------------------------------------------------------------+
Adjusting client file system sizes ...
Adjusting size for /
Adjusting size for /admin
Adjusting size for /home
Adjusting size for /opt
Adjusting size for /opt/CA
Adjusting size for /opt/admin
Adjusting size for /opt/appmanager
Adjusting size for /opt/beta48
Adjusting size for /opt/controlm/agctm
Adjusting size for /opt/controlm/agctm/ctm/sysout
Adjusting size for /opt/mon
Adjusting size for /tmp
Adjusting size for /usr
Adjusting size for /var
Adjusting size for /var/log/syslog
Syncing cache data to client ...
Expanding /alt_inst/tmp client filesystem.
Filesystem size changed to 8388608
Filesystem size changed to 1310720

Removing cache file system /serveur01_alt/alt_inst/opt/mon
Removing cache file system /serveur01_alt/alt_inst/tmp
Removing cache file system /serveur01_alt/alt_inst/usr
Removing cache file system /serveur01_alt/alt_inst/var
Removing cache file system /serveur01_alt/alt_inst/var/log/syslog

+-----------------------------------------------------------------------------+
Executing nimadm phase 11.
+-----------------------------------------------------------------------------+
Cloning altinst_rootvg on client, Phase 3.
Client alt_disk_install command: alt_disk_copy -j -M 6.1 -P3 -d "hdisk2"
## Phase 3 ###################
Verifying altinst_rootvg...
Modifying ODM on cloned disk.
forced unmount of /alt_inst/var/log/syslog
forced unmount of /alt_inst/var
forced unmount of /alt_inst/usr
forced unmount of /alt_inst/tmp
forced unmount of /alt_inst/opt/mon
forced unmount of /alt_inst/opt/controlm/agctm/ctm/sysout
forced unmount of /alt_inst/opt/controlm/agctm
forced unmount of /alt_inst/opt/beta48
forced unmount of /alt_inst/opt/appmanager
forced unmount of /alt_inst/opt/admin
forced unmount of /alt_inst/opt/CA
forced unmount of /alt_inst/opt
forced unmount of /alt_inst/home
forced unmount of /alt_inst/admin
forced unmount of /alt_inst
Changing logical volume names in volume group descriptor area.
Fixing LV control blocks...
Fixing file system superblocks...
Bootlist is set to the boot disk: hdisk2 blv=hd5

+-----------------------------------------------------------------------------+
Executing nimadm phase 10.
+-----------------------------------------------------------------------------+
Unmounting client mounts on the NIM master.
forced unmount of /serveur01_alt/alt_inst/var/log/syslog
forced unmount of /serveur01_alt/alt_inst/var/log/syslog
forced unmount of /serveur01_alt/alt_inst/va

+-----------------------------------------------------------------------------+
Executing nimadm phase 11.
+-----------------------------------------------------------------------------+
Cloning altinst_rootvg on client, Phase 3.
Client alt_disk_install command: alt_disk_copy -j -M 6.1 -P3 -d "hdisk2"
## Phase 3 ###################
Verifying altinst_rootvg...
Modifying ODM on cloned disk.
forced unmount of /alt_inst/var/log/syslog

+-----------------------------------------------------------------------------+
Executing nimadm phase 12.
+-----------------------------------------------------------------------------+
Cleaning up alt_disk_migration on the NIM master.
Cleaning up alt_disk_migration on client serveur01.
You have mail in /usr/spool/mail/root

    C'est assez long. Il faut compter environ 2 à 3 heures d'installation.

    Dans une autre console on peut voir l'état du client: 

     #lsnim -l serveur01
serveur01:
   class          = machines
   type           = standalone
   locked         = 16253328
   connect        = nimsh
   comments       = site=vega;env=rec;dmz=true
   current_master = sxpnim01
   sync_required  = yes
   platform       = chrp
   netboot_kernel = mp
   if1            = ent-NetworkAdminMon serveur01 0AA92FFF4402 ent0
   net_settings1  = 1000 full
   cable_type1    = N/A
   Cstate         = @red(alt_disk_mig operation is being performed)
   prev_state     = ready for a NIM operation
   Mstate         = currently running
   lpp_source     = lpp_source61TL9SP2
   spot           = spot61TL9SP2
   cpuid          = 00F8A8544C00
   control        = master
   Cstate_result  = reset

    Cstate

    Sur le client on voit 

     lspv
hdisk0          00f8a854e10959eb                    rootvg          active
hdisk1          00f8a854e15ead94                    appsvg          active
hdisk2          00f8a8541648b07b                    altinst_rootvg  active

    La bootlist est mise automatiquement à jour. Il faut ensuite prévoir un reboot. 

    bootlist -o -m normal
hdisk2 blv=hd5 pathid=0
hdisk2 blv=hd5 pathid=1


    shutdown -Fr now

    Après reboot on trouve 

    lspv
hdisk0          00f8a854e10959eb                    old_rootvg
hdisk1          00f8a854e15ead94                    appsvg          active
hdisk2          00f8a8541648b07b                    rootvg          active

    Si vous obtenez un message semblable à ceci: 

    sudo ssh serveur01
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
cd:9c:54:8c:b5:b6:10:1d:f8:5a:bb:5b:ba:2b:db:bb.
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts to get rid of this message.
Offending RSA key in /root/.ssh/known_hosts:@red(764)
Password authentication is disabled to avoid man-in-the-middle attacks.
Keyboard-interactive authentication is disabled to avoid man-in-the-middle attacks.
Last unsuccessful login: Tue Jul  9 14:57:22 DFT 2013 on ssh from 192.19.10.10
Last login: Fri Jan 23 14:18:58 NFT 2015 on /dev/pts/1 from serveur01

    Supprimer dans le fichier known_hosts la ligne correspondante.