Seldon Install: keepalived for core-nN

seldon-install-keepalived-core.md

Seldon Install: keepalived for core-nN

TODO

• Add extra features like these:
  • https://github.com/shuge/man/blob/master/sa/ha/keepalived-quick-guide-on-fedora.md

Based on

• http://www.andrewklau.com/ovirt-hosted-engine-with-3-4-0-nightly/
• http://tecadmin.net/ip-failover-setup-using-keepalived-on-centos-redhat-6/
• http://support.severalnines.com/entries/23612682-Install-HAProxy-and-Keepalived-Virtual-IP-
• https://github.com/shuge/man/blob/master/sa/ha/keepalived-quick-guide-on-fedora.md

Install

yum install keepalived -y

Configure

Enable non-local IPv4 binds on all core nodes

echo "net.ipv4.ip_nonlocal_bind = 1" >> /etc/sysctl.conf
sysctl -p

/etc/keepalived/keepalived.conf

core-n1

vrrp_instance brstorage {

  interface brstorage

  virtual_router_id 30
  virtual_ipaddress {
    10.30.3.9/16
  }

  state MASTER
  priority 100  # core-n1 = 100 (master)

}

core-n2

vrrp_instance brstorage {

  interface brstorage

  virtual_router_id 30
  virtual_ipaddress {
    10.30.3.9/16
  }

  state BACKUP
  priority 99  # core-n2 = 99 (backup-n1)

}

core-n3

vrrp_instance brstorage {

  interface brstorage

  virtual_router_id 30
  virtual_ipaddress {
    10.30.3.9/16
  }

  state BACKUP
  priority 98  # core-n3 = 98 (backup-n2)

}

core-n4

vrrp_instance brstorage {

  interface brstorage

  virtual_router_id 30
  virtual_ipaddress {
    10.30.3.9/16
  }

  state BACKUP
  priority 97  # core-n4 = 97 (backup-n3)

}

core-n5

vrrp_instance brstorage {

  interface brstorage

  virtual_router_id 30
  virtual_ipaddress {
    10.30.3.9/16
  }

  state BACKUP
  priority 96  # core-n5 = 96 (backup-n4)

}

core-n6

vrrp_instance brstorage {

  interface brstorage

  virtual_router_id 30
  virtual_ipaddress {
    10.30.3.9/16
  }

  state BACKUP
  priority 95  # core-n6 = 95 (backup-n5)

}

Enable

systemctl enable  keepalived.service
systemctl restart keepalived.service