Defined Type: profile::lvs::interface_tweaks

Defined in:
modules/profile/manifests/lvs/interface_tweaks.pp

Overview

Parameters:

  • interface (Any) (defaults to: $name)
  • txqlen (Any) (defaults to: false)
  • rss_pattern (Any) (defaults to: '')
  • do_rps (Any) (defaults to: true)
  • ipip_enabled (Any) (defaults to: false)
  • do_ipv6_ra_primary (Any) (defaults to: false)


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# File 'modules/profile/manifests/lvs/interface_tweaks.pp', line 5

define profile::lvs::interface_tweaks(
    $interface=$name,
    $txqlen=false,
    $rss_pattern='',
    $do_rps=true,
    $ipip_enabled=false,
    $do_ipv6_ra_primary=false,
) {
    if $interface != $facts['interface_primary'] {
        interface::manual { $name:
            interface => $interface,
        }
    }

    if $do_ipv6_ra_primary {
        # Enable default route creation from IPv6 RA on primary interface: T358260
        if $interface == $facts['interface_primary'] {
            interface::pre_up_command { "${interface}-accept_ra_defrtr":
                interface => $interface,
                command   => "sysctl -w net.ipv6.conf.${interface}.accept_ra_defrtr=1",
            }
        }
    }

    # Disable LRO to avoid merging important headers for flow control and such
    interface::offload { "${interface}-lro":
        interface => $interface,
        setting   => 'lro',
        value     => 'off',
    }

    # RSS/RPS/XPS-type perf stuff ( https://www.kernel.org/doc/Documentation/networking/scaling.txt )
    if $do_rps {
        interface::rps { $name:
            interface   => $interface,
            rss_pattern => $rss_pattern,
        }
    }

    # Optional larger TX queue len for 10Gbps+
    if $txqlen {
        interface::txqueuelen { $name:
            interface => $interface,
            len       => $txqlen,
        }
    }

    if $interface in $facts['net_driver'] {
        $net_driver = $facts['net_driver'][$interface]['driver']
    } else {
        $net_driver = 'unknown'
        notice("WARNING: unknown net_driver for interface ${interface}")
    }


    if $net_driver =~ /^bnx(2x|t_en)$/ {
        # Max out ring buffers, seems to eliminate the spurious drops under heavy traffic
        $ring_size = $net_driver ? {
            'bnx2x' => 4078,
            'bnxt_en' => 2047,
        }

        interface::ring { "${name} rxring":
            interface => $interface,
            setting   => 'rx',
            value     => $ring_size,
        }

        # Disable ethernet PAUSE behavior, dropping is better than buffering (in reasonable cases!)
        interface::noflow { $interface: }

        # bnxt_en also needs the tx set explicitly, unlike bnx2x above
        if $net_driver == 'bnxt_en' {
            interface::ring { "${name} txring":
                interface => $interface,
                setting   => 'tx',
                value     => $ring_size,
            }
        }
    }

    # if we are using IPIP encapsulation we need the clsact qdisc + ipip-multiqueue-optimizer
    $ensure_clsact = bool2str($ipip_enabled, 'present', 'absent')
    interface::clsact { $name:
        ensure    => $ensure_clsact,
        interface => $interface,
    }
}