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ocfs2

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ocfs2 [2024-01-22 15:33:27] – [Stand: 2024-01-22 / Ubuntu 22.04.3 LTS] manfredocfs2 [2024-01-22 16:02:01] (aktuell) – [Stand: 2024-01-22 / Ubuntu 22.04.3 LTS] manfred
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 +====== OCFS2 (Oracle Cluster File System 2) ======
 +
 +OCFS2 ist seit Kernel 2.6.19 stabil (eingeführt 2005)
 +
 +Bei OCFS2 handelt es sich um ein Open-Source Cluster-Dateisystem von der Firma Oracle für Linux,
 +welches in einem Computercluster konkurrierenden Zugriff auf eine Shared Storage ermöglicht.
 +
 +OCFS2 unterstützt keine ACLs, die Unterstützung erweiterter Attribute und SELINUX ist geplant.\\
 +OCFS2 beherrscht gleichzeitig den gepufferten und ungepufferten ("O_DIRECT") Zugriff.\\
 +WAN-Tauglich ist es nicht => **//lower latency is highly recommended//**
 +
 +OCFS2 is a general purpose extent based shared disk cluster file
 +system with many similarities to ext3. It supports 64 bit inode
 +numbers, and has automatically extending metadata groups which may
 +also make it attractive for non-clustered use.
 +
 +  * [[http://oss.oracle.com/projects/ocfs2]]
 +  * [[http://oss.oracle.com/projects/ocfs2-tools]]
 +  * [[http://oss.oracle.com/projects/ocfs2/mailman/]]
 +  * **[[https://docs.oracle.com/en/operating-systems/oracle-linux/6/admin/ol_instcfg_ocfs2.html|Installing and Configuring OCFS2]]**
 +
 +
 +===== Stand: 2024-01-22 / Ubuntu 22.04.3 LTS =====
 +
 +  * [[https://www.oracle.com/us/technologies/linux/ocfs2-best-practices-2133130.pdf]]
 +
 +  o2cb add-heartbeat share_ocfs2 /dev/sdc1
 +  o2cb heartbeat-mode share_ocfs2 local
 +
 +  dpkg-reconfigure ocfs2-tools
 +  service o2cb stop
 +  service o2cb start
 +  ss -lntp
 +  mount /share_test/
 +
 +  echo "stats" | debugfs.ocfs2 -n /dev/sdc1
 +
 +<file>
 +node:
 +        ip_port = 7777
 +        ip_address = 192.168.2.101
 +        number = 0
 +        name = hostname01
 +        cluster = share_ocfs2
 +
 +node:
 +        ip_port = 7777
 +        ip_address = 192.168.2.102
 +        number = 1
 +        name = hostname02
 +        cluster = share_ocfs2
 +
 +node:
 +        ip_port = 7777
 +        ip_address = 192.168.2.103
 +        number = 2
 +        name = hostname03
 +        cluster = share_ocfs2
 +
 +cluster:
 +       name = share_ocfs2
 +       heartbeat_mode = local
 +       node_count = 3
 +</file>
 +
 +
 +===== Stand: 2016-01-22 / Ubuntu 14.04 =====
 +
 +  * [[http://oss.oracle.com/projects/ocfs2/]]
 +  * [[https://oss.oracle.com/projects/ocfs2/dist/documentation/v1.6/ocfs2-1_6-usersguide.pdf]]
 +
 +
 +==== Konfigurationsbeispiel OCFS"-Cluster ====
 +
 +  > fdisk /dev/vdb
 +  > fdisk -l /dev/vdb
 +  
 +  Disk /dev/vdb: 21.5 GB, 21474836480 bytes
 +  3 Köpfe, 34 Sektoren/Spur, 411206 Zylinder, zusammen 41943040 Sektoren
 +  Einheiten = Sektoren von 1 × 512 = 512 Bytes
 +  Sector size (logical/physical): 512 bytes / 512 bytes
 +  I/O size (minimum/optimal): 512 bytes / 512 bytes
 +  Festplattenidentifikation: 0x3dbc6fb1
 +  
 +     Gerät  boot.     Anfang        Ende     Blöcke   Id  System
 +  /dev/vdb1            2048    41943039    20970496   83  Linux
 +  
 +  > aptitude -y install ocfs2-tools
 +  > mkfs -t ocfs2 -L "share_ocfs2" /dev/vdb1
 +  > echo "LABEL="share_ocfs2"     /home   ocfs2   defaults,_netdev        0 0" >> /etc/fstab
 +  > cp /usr/share/doc/ocfs2-tools/examples/cluster.conf /etc/ocfs2/
 +  > vi /etc/ocfs2/cluster.conf
 +<file>
 +node:
 +        ip_port = 7777
 +        ip_address = 192.168.2.101
 +        number = 0
 +        name = hostname01
 +        cluster = share_ocfs2
 +
 +node:
 +        ip_port = 7777
 +        ip_address = 192.168.2.102
 +        number = 1
 +        name = hostname02
 +        cluster = share_ocfs2
 +
 +node:
 +        ip_port = 7777
 +        ip_address = 192.168.2.103
 +        number = 2
 +        name = hostname03
 +        cluster = share_ocfs2
 +
 +cluster:
 +        node_count = 3
 +        name = share_ocfs2
 +</file>
 +
 +__Bei **''"name = "''** muss die Ausgabe von **''"uname -n"''** angegeben werden!__
 +
 +  # service o2cb configure
 +  > dpkg-reconfigure ocfs2-tools
 +  Loading filesystem "configfs": OK
 +  Mounting configfs filesystem at /sys/kernel/config: OK
 +  Loading stack plugin "o2cb": OK
 +  Loading filesystem "ocfs2_dlmfs": OK
 +  Creating directory '/dlm': OK
 +  Mounting ocfs2_dlmfs filesystem at /dlm: OK
 +  Setting cluster stack "o2cb": OK
 +  Starting O2CB cluster share_ocfs2: OK
 +  
 +  > service o2cb online
 +  Cluster share_ocfs2 already online
 +  
 +  > /etc/init.d/ocfs2 start
 +  Starting Oracle Cluster File System (OCFS2) OK
 +  
 +  > service o2cb status
 +  Driver for "configfs": Loaded
 +  Filesystem "configfs": Mounted
 +  Stack glue driver: Loaded
 +  Stack plugin "o2cb": Loaded
 +  Driver for "ocfs2_dlmfs": Loaded
 +  Filesystem "ocfs2_dlmfs": Mounted
 +  Checking O2CB cluster share_ocfs2: Online
 +  Heartbeat dead threshold = 31
 +    Network idle timeout: 30000
 +    Network keepalive delay: 2000
 +    Network reconnect delay: 2000
 +  Checking O2CB heartbeat: Active
 +  
 +  > cat /etc/default/o2cb
 +  #
 +  # This is a configuration file for automatic startup of the O2CB
 +  # driver.  It is generated by running 'dpkg-reconfigure ocfs2-tools'.
 +  # Please use that method to modify this file.
 +  #
 +  
 +  # O2CB_ENABLED: 'true' means to load the driver on boot.
 +  O2CB_ENABLED=true
 +  
 +  # O2CB_BOOTCLUSTER: If not empty, the name of a cluster to start.
 +  O2CB_BOOTCLUSTER=share_ocfs2
 +  
 +  # O2CB_HEARTBEAT_THRESHOLD: Iterations before a node is considered dead.
 +  O2CB_HEARTBEAT_THRESHOLD=31
 +  
 +  # O2CB_IDLE_TIMEOUT_MS: Time in ms before a network connection is considered dead.
 +  O2CB_IDLE_TIMEOUT_MS=30000
 +  
 +  # O2CB_KEEPALIVE_DELAY_MS: Max. time in ms before a keepalive packet is sent.
 +  O2CB_KEEPALIVE_DELAY_MS=2000
 +  
 +  # O2CB_RECONNECT_DELAY_MS: Min. time in ms between connection attempts.
 +  O2CB_RECONNECT_DELAY_MS=2000
 +
 +  > tunefs.ocfs2 -Q "Label = %V\nUUID = %U\nNumSlots =%N\n" /dev/sdc1
 +  Label = share_ocfs2
 +  UUID = 74FD5D9EC36F4B5897A47D2F98F8D40D
 +  NumSlots =2
 +
 +  > o2info -h
 +  > o2info --volinfo /dev/sdc1
 +
 +  > ss -lntp
 +  State      Recv-Q     Send-Q         Local Address:Port          Peer Address:Port     Process                                                                                
 +  LISTEN     0          64             192.168.2.101:7777               0.0.0.0:*
 +
 +
 +===== Stand: 2010-11-10 / Ubuntu 10.04 =====
 +
 +  aptitude install ocfs2-tools ocfs2console
 +  
 +  Hole:1 http://de.archive.ubuntu.com karmic/main ocfs2-tools 1.4.2-1 [710kB]
 +  Hole:2 http://de.archive.ubuntu.com karmic/main python-cairo 1.8.6-1ubuntu1 [105kB]
 +  Hole:3 http://de.archive.ubuntu.com karmic/main python-gtk2 2.16.0-0ubuntu1 [1.711kB]
 +  Hole:4 http://de.archive.ubuntu.com karmic/main ocfs2console 1.4.2-1 [107kB]
 +  
 +  http://oss.oracle.com/projects/ocfs2/
 +  http://oss.oracle.com/projects/ocfs2/dist/documentation/ocfs2_faq.html
 +  
 +  ################################################################################
 +  # O2CB - Default cluster stack for the OCFS2 file system.
 +  
 +  Damit O2CB problemlos funktioniert, sollte man SELINUX und iptables abschalten
 +  oder wenigstens modifizieren.
 +  Vielleicht wird SELINUX in Zukunft auch unterstützt, wenn das Dateisystem mit
 +  erweiterten Attributen umgehen können wird.
 +  
 +  
 +  
 +  #aptitude install ocfs2-tools ocfs2console
 +  aptitude install ocfs2-tools
 +  
 +  Die "cluster.conf" ist auf allen Cluster-Knoten die gleiche:
 +  cp /usr/share/doc/ocfs2-tools/examples/cluster.conf /etc/ocfs2/
 +  
 +  vi /etc/ocfs2/cluster.conf
 +  node:
 +  ip_port = 7777
 +  ip_address = 10.10.10.1
 +  number = 0
 +  name = hostname1.domain.de
 +  cluster = ocfs2cluster
 +  
 +  node:
 +  ip_port = 7777
 +  ip_address = 10.10.10.2
 +  number = 1
 +  name = hostname2
 +  cluster = ocfs2cluster
 +  
 +  cluster:
 +  node_count = 2
 +  name = ocfs2cluster
 +  
 +  
 +  
 +  mkfs.ocfs2 -L "ocfs2cluster" /dev/sda1
 +  fsck.ocfs2 -f -r 2 /dev/sda1
 +  
 +  vi /etc/fstab
 +  /dev/sda1 /dir ocfs2 _netdev 0 0
 +  
 +  
 +  
 +  ### O2CB Cluster Timeout Configuration
 +  #
 +  ### RedHat
 +  # service o2cb configure
 +  #
 +  ### Debian
 +  dpkg-reconfigure ocfs2-tools
 +  
 +  
 +  /etc/init.d/o2cb start
 +  /etc/init.d/o2cb status
 +  
 +  /etc/init.d/ocfs2 start
 +  /etc/init.d/ocfs2 status
 +  
 +  ln -s /etc/init.d/o2cb /etc/rc2.d/S98o2cb
 +  ln -s /etc/init.d/o2cb /etc/rc3.d/S98o2cb
 +  ln -s /etc/init.d/o2cb /etc/rc4.d/S98o2cb
 +  ln -s /etc/init.d/o2cb /etc/rc5.d/S98o2cb
 +  ln -s /etc/init.d/o2cb /etc/rc0.d/K01o2cb
 +  ln -s /etc/init.d/o2cb /etc/rc1.d/K01o2cb
 +  ln -s /etc/init.d/o2cb /etc/rc6.d/K01o2cb
 +  ln -s /etc/init.d/ocfs2 /etc/rc2.d/S99ocfs2
 +  ln -s /etc/init.d/ocfs2 /etc/rc3.d/S99ocfs2
 +  ln -s /etc/init.d/ocfs2 /etc/rc4.d/S99ocfs2
 +  ln -s /etc/init.d/ocfs2 /etc/rc5.d/S99ocfs2
 +  ln -s /etc/init.d/ocfs2 /etc/rc0.d/K00ocfs2
 +  ln -s /etc/init.d/ocfs2 /etc/rc1.d/K00ocfs2
 +  ln -s /etc/init.d/ocfs2 /etc/rc6.d/K00ocfs2
 +  #
 +  # ODER
 +  #
 +  #update-rc.d o2cb start 98 2 3 4 5 . stop 01 0 1 6 .
 +  #update-rc.d ocfs2 start 98 2 3 4 5 . stop 01 0 1 6 .
 +  #
 +  # ODER
 +  #
 +  #aptitude install chkconfig lsb-base
 +  #chkconfig -a o2cb
 +  #chkconfig -s o2cb  on
 +  #chkconfig -a ocfs2
 +  #chkconfig -s ocfs2 on
 +  
 +  ################################################################################
 +  
 +  To manually enable panic on oops and set a 30 sec timeout for reboot on panic, do:
 +        $ echo 1 > /proc/sys/kernel/panic_on_oops
 +        $ echo 30 > /proc/sys/kernel/panic
 +  
 +  To enable the above on every reboot, add the following to /etc/sysctl.conf:
 +        kernel.panic_on_oops = 1
 +        kernel.panic = 30
 +