Chapter 8. Modifying, displaying, and exporting the corosync.conf file

Procedure

• The following command modifies the parameters in the corosync.conf file:

  # pcs cluster config update [transport pass:quotes[transport options]] [compression pass:quotes[compression options]] [crypto pass:quotes[crypto options]] [totem pass:quotes[totem options]] [--corosync_conf pass:quotes[path]]

• The following example command udates the knet_pmtud_interval transport value and the token and join totem values:

  # pcs cluster config update transport knet_pmtud_interval=35 totem token=10000 join=100

Procedure

• Display the contents of the corosync.conf file:

  # pcs cluster corosync

  You can print the contents of the corosync.conf file in a human-readable format with the pcs cluster config command, as in the following example.

  The output for this command includes the UUID for the cluster if the UUID was added manually as described in Identifying clusters by UUID.

  [root@r8-node-01 ~]# pcs cluster config
  Cluster Name: HACluster
  Cluster UUID: ad4ae07dcafe4066b01f1cc9391f54f5
  Transport: knet
  Nodes:
    r8-node-01:
      Link 0 address: r8-node-01
      Link 1 address: 192.168.122.121
      nodeid: 1
    r8-node-02:
      Link 0 address: r8-node-02
      Link 1 address: 192.168.122.122
      nodeid: 2
  Links:
    Link 1:
      linknumber: 1
      ping_interval: 1000
      ping_timeout: 2000
      pong_count: 5
  Compression Options:
    level: 9
    model: zlib
    threshold: 150
  Crypto Options:
    cipher: aes256
    hash: sha256
  Totem Options:
    downcheck: 2000
    join: 50
    token: 10000
  Quorum Device: net
    Options:
      sync_timeout: 2000
      timeout: 3000
    Model Options:
      algorithm: lms
      host: r8-node-03
    Heuristics:
      exec_ping: ping -c 1 127.0.0.1

Procedure

• Export the corosync.conf file:

  [root@r8-node-01 ~]# pcs cluster config show --output-format=cmd
  pcs cluster setup HACluster \
    r8-node-01 addr=r8-node-01 addr=192.168.122.121 \
    r8-node-02 addr=r8-node-02 addr=192.168.122.122 \
    transport \
    knet \
      link \
        linknumber=1 \
        ping_interval=1000 \
        ping_timeout=2000 \
        pong_count=5 \
      compression \
        level=9 \
        model=zlib \
        threshold=150 \
      crypto \
        cipher=aes256 \
        hash=sha256 \
    totem \
      downcheck=2000 \
      join=50 \
      token=10000