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Ceci est une ancienne révision du document !

SAN CUSTOM - MDL-NAS

  • au préalable
    • Fedora 43 avec cockpit, TGTD installés
[root@mdl-nas ~]# dnf install cockpit targetcli nmap
[root@mdl-nas ~]# systemctl enable --now tgtd
[root@mdl-nas ~]# systemctl enable --now cockpit
  • ouverture des ports sur le firewall 
[root@mdl-nas ~]# firewall-cmd --add-service=cockpit --permanent
[root@mdl-nas ~]# firewall-cmd --add-port=3260/tcp --permanent 
success
 
 
[root@mdl-nas ~]#  firewall-cmd --reload
success
 
 
[root@mdl-nas ~]#  firewall-cmd --list-all 
public (default, active)
  target: default
  ingress-priority: 0
  egress-priority: 0
  icmp-block-inversion: no
  interfaces: enp3s0f0 enp5s0
  sources: 
  services: cockpit dhcpv6-client mdns ssh
  ports: 3260/tcp
  protocols: 
  forward: yes
  masquerade: no
  forward-ports: 
  source-ports: 
  icmp-blocks: 
  rich rules:
  • raid 5 sur 8 ssd de 500GB (créé avec le cockpit)
  • on y a créé un Volume-group et 2 logical-volume pour nos 2 hyperviseurs
[root@mdl-nas ~]# pvs
  PV         VG      Fmt  Attr PSize    PFree  
  /dev/md127 vgroup0 lvm2 a--     3,18t  <1,24t
  /dev/sda3  fedora  lvm2 a--  <109,20g <94,20g
 
[root@mdl-nas ~]# lvs
  LV          VG      Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  root        fedora  -wi-ao----  15,00g                                                    
  lv_hyper-v1 vgroup0 -wi-ao---- 558,79g                                                    
  lv_hyper-v2 vgroup0 -wi-ao----  <1,40t
  • Creation ISCI portal et LUN (bridage de la publication des LUN sur les IP des interfaces des initiateurs)
# avec TGTADM (plus d'options)
[root@mdl-nas ~]#  tgtadm --lld iscsi --op new --mode target --tid 1 -T iqn.fr.delag.labo.mdl-nas:hyper-v1.VM1
[root@mdl-nas ~]# tgtadm --lld iscsi --op bind --mode target --tid 1 -I  10.6.0.5
[root@mdl-nas ~]# tgtadm --lld iscsi --op new --mode logicalunit --tid 1 --lun 0 -b /dev/vgroup0/lv_hyper-v1
 
[root@mdl-nas ~]# tgtadm --lld iscsi --op new --mode target --tid 2 -T iqn.fr.delag.labo.mdl-nas:hyper-v2.VM1
[root@mdl-nas ~]# tgtadm --lld iscsi --op bind --mode target --tid 2 -I  10.6.0.6
[root@mdl-nas ~]# tgtadm --lld iscsi --op new --mode logicalunit --tid 2 --lun 1 -b /dev/vgroup0/lv_hyper-v2
 
# avec un script fournis par le package
[root@mdl-nas ~]#  tgt-setup-lun -n iqn.fr.delag.labo.mdl-nas:hyper-v1.VM1 -d /dev/vgroup0/lv_hyper-v1  10.6.0.5
[root@mdl-nas ~]#  tgt-setup-lun -n iqn.fr.delag.labo.mdl-nas:hyper-v2.VM1 -d /dev/vgroup0/lv_hyper-v2  10.6.0.6
  • affichage LUN et portail
[root@mdl-nas ~]# tgtadm --lld iscsi --op show --mode portal
Portal: [::]:3260,1
Portal: 0.0.0.0:3260,1
 
 
[root@mdl-nas ~]# tgtadm --lld iscsi --op show --mode target
Target 1: iqn.fr.delag.labo.mdl-nas:hyper-v1
    System information:
        Driver: iscsi
        State: ready
    I_T nexus information:
        I_T nexus: 1
            Initiator: iqn.fr.delag.labo.hyper-v1 alias: none
            Connection: 1
                IP Address: 10.6.0.5
    LUN information:
        LUN: 0
            Type: controller
            SCSI ID: IET     00010000
            SCSI SN: beaf10
            Size: 0 MB, Block size: 1
            Online: Yes
            Removable media: No
            Prevent removal: No
            Readonly: No
            SWP: No
            Thin-provisioning: No
            Backing store type: null
            Backing store path: None
            Backing store flags: 
        LUN: 1
            Type: disk
            SCSI ID: IET     00010001
            SCSI SN: beaf11
            Size: 599999 MB, Block size: 512
            Online: Yes
            Removable media: No
            Prevent removal: No
            Readonly: No
            SWP: No
            Thin-provisioning: No
            Backing store type: rdwr
            Backing store path: /dev/vgroup0/lv_hyper-v1
            Backing store flags: 
    Account information:
    ACL information:
        10.6.0.5
Target 2: iqn.fr.delag.labo.mdl-nas:hyper-v2.VM1
    System information:
        Driver: iscsi
        State: ready
    I_T nexus information:
        I_T nexus: 2
            Initiator: iqn.fr.delag.labo.hyper-v2 alias: hyper-v2
            Connection: 0
                IP Address: 10.6.0.6
    LUN information:
        LUN: 0
            Type: controller
            SCSI ID: IET     00020000
            SCSI SN: beaf20
            Size: 0 MB, Block size: 1
            Online: Yes
            Removable media: No
            Prevent removal: No
            Readonly: No
            SWP: No
            Thin-provisioning: No
            Backing store type: null
            Backing store path: None
            Backing store flags: 
        LUN: 1
            Type: disk
            SCSI ID: 360000000000000000e00000000020001
            SCSI SN: beaf20
            Size: 1538672 MB, Block size: 512
            Online: Yes
            Removable media: No
            Prevent removal: No
            Readonly: No
            SWP: No
            Thin-provisioning: No
            Backing store type: rdwr
            Backing store path: /dev/vgroup0/lv_hyper-v2
            Backing store flags: 
    Account information:
    ACL information:
        10.6.0.6

Les LUN et portail actifs ne sont pas persistants et sont perdus au reboot ou au redémarrage de tgtd.service

Rendre persistant les target
  • Cela est possible en créant le fichier /etc/tgt/targets.conf
    • backing-store:
    • direct-store:
vi /etc/tgt/targets.conf
 
# simple 
<target iqn.labo:mdl-nas.labo.delag.fr>
    backing-store /dev/vgroup0/lv_hyper-v1
</target>
 
#
  • on recharge la conf
[root@mdl-nas ~]# systemctl reload tgtd.service 
[root@mdl-nas ~]# 
[root@mdl-nas ~]# 
[root@mdl-nas ~]# 
[root@mdl-nas ~]# systemctl status tgtd.service 
● tgtd.service - tgtd iSCSI target daemon
     Loaded: loaded (/usr/lib/systemd/system/tgtd.service; enabled; preset: disabled)
    Drop-In: /usr/lib/systemd/system/service.d
             └─10-timeout-abort.conf
     Active: active (running) since Thu 2026-01-08 21:16:36 CET; 10h ago
 Invocation: d40992843bac469aac109b6fb1d798d4
    Process: 13169 ExecReload=/usr/sbin/tgt-admin --update ALL -c $TGTD_CONFIG (code=exited, status=0/SUCCESS)
   Main PID: 1054 (tgtd)
      Tasks: 1 (limit: 9368)
     Memory: 6.1M (peak: 12.6M)
        CPU: 1.344s
     CGroup: /system.slice/tgtd.service
             └─1054 /usr/sbin/tgtd -f
 
janv. 08 21:16:30 mdl-nas.delag.labo.fr systemd[1]: Starting tgtd.service - tgtd iSCSI target daemon...
janv. 08 21:16:31 mdl-nas.delag.labo.fr tgtd[1054]: tgtd: iser_ib_init(3431) Failed to initialize RDMA; load kernel modules?
janv. 08 21:16:31 mdl-nas.delag.labo.fr tgtd[1054]: tgtd: work_timer_start(146) use timer_fd based scheduler
janv. 08 21:16:31 mdl-nas.delag.labo.fr tgtd[1054]: tgtd: bs_init(387) use signalfd notification
janv. 08 21:16:36 mdl-nas.delag.labo.fr systemd[1]: Started tgtd.service - tgtd iSCSI target daemon.
janv. 09 07:43:55 mdl-nas.delag.labo.fr systemd[1]: Reloading tgtd.service - tgtd iSCSI target daemon...
janv. 09 07:43:55 mdl-nas.delag.labo.fr systemd[1]: Reloaded tgtd.service - tgtd iSCSI target daemon.
  • on affiche la conf
[root@mdl-nas ~]# tgtadm --mode target --op show
Target 2: iqn.labo:hyper-v1.labo.delag.fr
    System information:
        Driver: iscsi
        State: ready
    I_T nexus information:
    LUN information:
        LUN: 0
            Type: controller
            SCSI ID: IET     00020000
            SCSI SN: beaf20
            Size: 0 MB, Block size: 1
            Online: Yes
            Removable media: No
            Prevent removal: No
            Readonly: No
            SWP: No
            Thin-provisioning: No
            Backing store type: null
            Backing store path: None
            Backing store flags: 
    Account information:
    ACL information:
        ALL