drbd:\\

  global {
        usage-count yes;
        # minor-count dialog-refresh disable-ip-verification
  }
  
  common {
        handlers {
                # These are EXAMPLE handlers only.
                # They may have severe implications,
                # like hard resetting the node under certain circumstances.
                # Be careful when chosing your poison.
  
                pri-on-incon-degr "/usr/lib/drbd/notify-pri-on-incon-degr.sh; /usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ; reboot -f";
                pri-lost-after-sb "/usr/lib/drbd/notify-pri-lost-after-sb.sh; /usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ; reboot -f";
                local-io-error "/usr/lib/drbd/notify-io-error.sh; /usr/lib/drbd/notify-emergency-shutdown.sh; echo o > /proc/sysrq-trigger ; halt -f";
                # fence-peer "/usr/lib/drbd/crm-fence-peer.sh";
                # split-brain "/usr/lib/drbd/notify-split-brain.sh root";
                # out-of-sync "/usr/lib/drbd/notify-out-of-sync.sh root";
                # before-resync-target "/usr/lib/drbd/snapshot-resync-target-lvm.sh -p 15 -- -c 16k";
                # after-resync-target /usr/lib/drbd/unsnapshot-resync-target-lvm.sh;
        }
  
        startup {
                wfc-timeout 60;
                degr-wfc-timeout 120;
                #outdated-wfc-timeout wait-after-sb
        }
  
        options {
                # cpu-mask on-no-data-accessible
        }
  
        disk {
                # size max-bio-bvecs on-io-error fencing disk-barrier disk-flushes
                # disk-drain md-flushes resync-rate resync-after al-extents
                # c-plan-ahead c-delay-target c-fill-target c-max-rate
                # c-min-rate disk-timeout
        }
  
        net {
                # protocol timeout max-epoch-size max-buffers unplug-watermark
                  # connect-int ping-int sndbuf-size rcvbuf-size ko-count
                # allow-two-primaries cram-hmac-alg shared-secret
                after-sb-0pri discard-zero-changes;
                after-sb-1pri discard-secondary;
                after-sb-2pri disconnect;
                #always-asbp rr-conflict
                # ping-timeout data-integrity-alg tcp-cork on-congestion
                # congestion-fill congestion-extents csums-alg verify-alg
                # use-rle
        }
  }

global-originale 8.4.4\\
  
  global {
        usage-count no;
        # minor-count dialog-refresh disable-ip-verification
  }
  
  common {
        handlers {
                # These are EXAMPLE handlers only.
                # They may have severe implications,
                # like hard resetting the node under certain circumstances.
                # Be careful when chosing your poison.
  
                # pri-on-incon-degr "/usr/lib/drbd/notify-pri-on-incon-degr.sh; /usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ; reboot -f";
                # pri-lost-after-sb "/usr/lib/drbd/notify-pri-lost-after-sb.sh; /usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ; reboot -f";
                # local-io-error "/usr/lib/drbd/notify-io-error.sh; /usr/lib/drbd/notify-emergency-shutdown.sh; echo o > /proc/sysrq-trigger ; halt -f";
                # fence-peer "/usr/lib/drbd/crm-fence-peer.sh";
                # split-brain "/usr/lib/drbd/notify-split-brain.sh root";
                # out-of-sync "/usr/lib/drbd/notify-out-of-sync.sh root";
                # before-resync-target "/usr/lib/drbd/snapshot-resync-target-lvm.sh -p 15 -- -c 16k";
                # after-resync-target /usr/lib/drbd/unsnapshot-resync-target-lvm.sh;
        }
  
        startup {
                # wfc-timeout degr-wfc-timeout outdated-wfc-timeout wait-after-sb
        }
  
        options {
                # cpu-mask on-no-data-accessible
        }
  
        disk {
                # size max-bio-bvecs on-io-error fencing disk-barrier disk-flushes
                # disk-drain md-flushes resync-rate resync-after al-extents
                # c-plan-ahead c-delay-target c-fill-target c-max-rate
                # c-min-rate disk-timeout
        }
  
        net {
                # protocol timeout max-epoch-size max-buffers unplug-watermark
                # connect-int ping-int sndbuf-size rcvbuf-size ko-count
                # allow-two-primaries cram-hmac-alg shared-secret after-sb-0pri
                # after-sb-1pri after-sb-2pri always-asbp rr-conflict
                # ping-timeout data-integrity-alg tcp-cork on-congestion
                # congestion-fill congestion-extents csums-alg verify-alg
                # use-rle
          }
  }




risorse:\\

  resource resa {
         protocol C;
         net {
                allow-two-primaries ;
        }
        startup {
               become-primary-on both;
        }
  
  on n4 {
    device    /dev/drbd0;
    disk      /dev/sda6;
    address   192.168.1.117:7788;
    meta-disk internal;
  }
  
  on n5 {
    device    /dev/drbd0;
    disk      /dev/sda6;
    address   192.168.1.107:7788;
    meta-disk internal;
  }
  }

cluster

  <?xml version="1.0"?>
  <cluster name="clstr" config_version="3">
  <fence_daemon clean_start="1" post_fail_delay="0" post_join_delay="5"/>
  <clusternodes>
        <clusternode name="n4" nodeid="1">
      <fence>
        <method name="ack-redirect">
          <device name="manual" port="n4"/>
        </method>
      </fence>
        </clusternode>
  <clusternode name="n5" nodeid="2">
      <fence>
        <method name="ack-redirect">
          <device name="manual" port="n5"/>
        </method>
      </fence>
        </clusternode>
  </clusternodes>
  <cman expected_votes="1" two_node="1" transport="udpu"/>
  <fencedevices>
        <fencedevice name="manual" agent="fence_pcmk"/>
  </fencedevices>
  
  <rm>
    <failoverdomains/>
    <resources/>
  </rm>
  <dlm enable_quorum="0" enable_fencing="0"/>
  
  <gfs_controld enable_withdraw="0"/>
  </cluster>

agenti fence:\\
dovrebbe essere:\\
fence_ack_manual\\
oppure:\\
fence_pcmk\\
ma con l'aggiunta dell'opzione port="nomenodo" nel device method\\
esempio:\\

  <?xml version="1.0"?>
  <cluster name="clstr" config_version="4">
  
    <clusternodes>
      <clusternode name="n4" votes="1" nodeid="1">
        <fence>
          <method name="single">
            <device name="manual" port="n4"/>
          </method>
        </fence>
      </clusternode>
      <clusternode name="n5" votes="1" nodeid="2">
        <fence>
          <method name="single">
            <device name="manual" port="n4"/>
          </method>
        </fence>
      </clusternode>
    </clusternodes>
  
    <fencedevices>
    <fencedevice name="manual" agent="fence_ack_manual"/></fencedevices>
  
    <rm>
      <failoverdomains/>
      <resources/>
    </rm>
  </cluster>

oppure:\\

  <?xml version="1.0"?>
  <cluster config_version="1" name="mycluster">
    <logging debug="off"/>
    <clusternodes>
      <clusternode name="pcmk-1" nodeid="1">
        <fence>
          <method name="pcmk-redirect">
            <device name="pcmk" port="pcmk-1"/>
          </method>
        </fence>
      </clusternode>
      <clusternode name="pcmk-2" nodeid="2">
        <fence>
          <method name="pcmk-redirect">
            <device name="pcmk" port="pcmk-2"/>
          </method>
        </fence>
      </clusternode>
    </clusternodes>
    <fencedevices>
      <fencedevice name="pcmk" agent="fence_pcmk"/>
    </fencedevices>
  </cluster>

hosts

  127.0.0.1       localhost
  192.168.1.117   n4
  192.168.1.107   n5
  
  ::1             localhost ip6-localhost ip6-loopback
  fe00::0         ip6-localnet
  ff00::0         ip6-mcastprefix
  ff02::1         ip6-allnodes
  ff02::2         ip6-allrouters
  
  #127.0.1.1      n4

interface

  auto eth0
  iface eth0 inet static
  address 192.168.1.117
  netmask 255.255.255.0
  gateway 192.168.1.1
                   
servizi default rcS\\

  K05hwclock.sh	   S03keyboard-setup	      S09mountall-bootclean.sh	S15console-setup
  K12rpcbind	   S04mountdevsubfs.sh	      S10procps			S16alsa-utils
  K13nfs-common	   S05checkroot.sh	      S10udev-mtab		S16bootmisc.sh
  README	   S06checkroot-bootclean.sh  S10urandom		S16plymouth-log
  S01fake-hwclock  S06kmod		      S11networking		S16x11-common
  S01hostname.sh   S06mtab.sh		      S12mountnfs.sh
  S01mountkernfs.sh  S07checkfs.sh	      S13mountnfs-bootclean.sh
  S02udev	   S08mountall.sh	      S14kbd

servizi default rc2\\

  K01lightdm     README	      S01ifplugd  S01triggerhappy    S02ntp	      S05plymouth
  K03drbd        S01bootlogs    S01motd	  S02cron	     S02rsync	      S05rc.local
  K05nfs-common  S01cgroup-bin  S01rsyslog  S02dbus	     S02ssh	      S05rmnologin
  K05rpcbind     S01dhcpcd      S01sudo	  S02dphys-swapfile  S04avahi-daemon
  
dopo inst cman e gfs2\\

  K05hwclock.sh	   S04mountdevsubfs.sh	      S10urandom
  K12rpcbind	   S05checkroot.sh	      S11networking
  K13nfs-common	   S06checkroot-bootclean.sh  S12mountnfs.sh
  K16alsa-utils	   S06kmod		      S13mountnfs-bootclean.sh
  K16x11-common	   S06lvm2		      S14kbd
  README	   S06mtab.sh		      S15console-setup
  S01fake-hwclock    S07checkfs.sh	      S16bootmisc.sh
  S01hostname.sh	   S08mountall.sh     S16cman
  S01mountkernfs.sh  S09mountall-bootclean.sh   S16plymouth-log
  S02udev	   S10procps		      S17gfs2-tools
  S03keyboard-setup  S10udev-mtab

dopo inst cman e gfs2 rc2\\

  K01avahi-daemon  K06rpcbind   S01triggerhappy	 S02ssh
  K01cgroup-bin	 README       S02cron		 S03drbd
  K01dhcpcd	 S01bootlogs  S02dbus		 S04corosync
  K01ifplugd	 S01motd      S02dphys-swapfile  S05plymouth
  K01lightdm	 S01rsyslog   S02ntp		 S05rc.local
  K06nfs-common	 S01sudo      S02rsync		 S05rmnologin
 
inserire l'avvio del drbd qui:\\
  vi /etc/rcS.d/S12mountnfs.sh