load-balancer optimizations

gistfile1.txt

  # Sysctl settings.
  # Load-balancer required sysctl settings
  sysctl::value { 'net.ipv4.ip_nonlocal_bind':
    value => 1,
  }
  sysctl::value { 'net.ipv4.ip_forward':
    value => 1,
  }
  sysctl::value { 'vm.max_map_count':
    value => '262144',
  }
  sysctl::value { 'net.ipv4.tcp_rmem':
    value => '4096 16060 262144',
  }
  sysctl::value { 'net.ipv4.tcp_wmem':
    value => '4096 16060 262144',
  }
  sysctl::value { 'net.ipv4.tcp_tw_reuse':
    value => '1',
  }
  sysctl::value { 'net.ipv4.tcp_fin_timeout':
    value => '30',
  }
  sysctl::value { 'net.core.netdev_max_backlog':
    value => '10000',
  }
  sysctl::value { 'net.ipv4.tcp_syncookies':
    value => '1',
  }
  sysctl::value { 'net.ipv4.conf.all.rp_filter':
    value => '1',
  }
  sysctl::value { 'net.core.somaxconn':
    value => '60000',
  }
  sysctl::value { 'net.ipv4.tcp_max_syn_backlog':
    value => '60000',
  }
  sysctl::value { 'net.ipv4.tcp_synack_retries':
    value => '3',
  }
  sysctl::value { 'kernel.sem':
    value => '250 32000 32 500',
  }
  sysctl::value { 'net.ipv4.ip_local_port_range':
    value => '1024 65023',
  }
  sysctl::value { 'vm.swappiness':
    value => '5',
  }
  sysctl::value { 'net.nf_conntrack_max':
    value => '165536',
  }