Anycast Example using Quagga on SmartOS

anycast

#!/bin/bash

# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at https://mozilla.org/MPL/2.0/.

# This is the SMF start method for anycast.
# Put it in /opt/custom/smf/anycast

set -o xtrace

source /lib/svc/share/smf_include.sh || true

usage() {
    echo "$0 -c <configuration> {start | stop}"
}

while getopts "c:" options
do
    case $options in
        c ) config="${OPTARG}";;
        h ) usage;;
        * ) usage; exit "$SMF_EXIT_ERR_FATAL";;
    esac
done

if ! [[ -f $config ]]; then
    usage
    exit "$SMF_EXIT_ERR_FATAL"
fi

method_start() {
    while read -a line
    do
        ipadm create-addr -t -T static -a local="${line[0]}" "${line[1]}"
    done < "${config}"
    named_pid=$(pgrep -c $(svcs -H -o ctid pkgsrc/bind))
    if [[ -n $named_pid ]]; then
        ppriv -s A+net_privaddr "${named_pid}"
    fi
}

method_stop() {
    while read -a line
    do
        ipadm delete-addr "${line[1]}"
    done < "${config}"
}

action=${*:$OPTIND:1}

case $action in
    start) method_start;;
    stop)  method_stop;;
    *)     usage; exit "$SMF_EXIT_ERR_FATAL";;
esac

exit 0

anycast.conf

# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at https://mozilla.org/MPL/2.0/.

# This is the config file for the SMF anycast service.
# The format is as follows:
#
#     address/prefix-length addr-obj
#
# This will be fed directly into ipadm, and there's no sanity
# checking. Patches welcome!

1.1.1.1/32 lo0/dns1
8.8.8.8/32 lo0/dns8

anycast.xml

<?xml version="1.0"?>
<!DOCTYPE service_bundle SYSTEM "/usr/share/lib/xml/dtd/service_bundle.dtd.1">

<!-- This Source Code Form is subject to the terms of the Mozilla Public
   - License, v. 2.0. If a copy of the MPL was not distributed with this
   - file, You can obtain one at https://mozilla.org/MPL/2.0/. -->

<!--
        Created by Manifold
-->

<service_bundle type="manifest" name="anycast">

    <service name="network/anycast" type="service" version="1.1">

        <dependency name="network" grouping="require_all" restart_on="error" type="service">
            <service_fmri value="svc:/milestone/network:default"/>
        </dependency>

        <dependency name="filesystem" grouping="require_all" restart_on="error" type="service">
            <service_fmri value="svc:/system/filesystem/local"/>
        </dependency>

        <dependency name="bind" grouping="require_all" restart_on="restart" type="service">
            <service_fmri value="svc:/pkgsrc/bind:default"/>
        </dependency>

        <dependency name="ospf" grouping="require_any" restart_on="restart" type="service">
            <service_fmri value="svc:/pkgsrc/quagga:ospf"/>
        </dependency>

        <dependency name="ospf6" grouping="require_any" restart_on="restart" type="service">
            <service_fmri value="svc:/pkgsrc/quagga:ospf6"/>
        </dependency>

        <dependency name='config-files' grouping='require_all' restart_on='refresh' type='path'>
            <service_fmri value='file://localhost/opt/custom/smf/anycast.conf' />
        </dependency>


        <instance name="default" enabled="true">

            <method_context>

            </method_context>

            <exec_method type="method" name="start" exec="/opt/custom/smf/anycast -c %{config_file} start" timeout_seconds="60"/>

            <exec_method type="method" name="stop" exec="/opt/custom/smf/anycast -c  %{config_file} stop" timeout_seconds="60"/>

            <property_group name="startd" type="framework">

                <propval name="duration" type="astring" value="transient"/>

                <propval name="ignore_error" type="astring" value="core,signal"/>
            </property_group>

            <property_group name="application" type="application">
                <propval name="config_file" type="astring" value="/opt/custom/smf/anycast.conf"/>
            </property_group>

        </instance>



        <stability value="Evolving"/>

        <template>
            <common_name>
                <loctext xml:lang="C">
                        Anycast
                </loctext>
            </common_name>
        </template>

    </service>

</service_bundle>

ospf6d.conf.erb

! This Source Code Form is subject to the terms of the Mozilla Public
! License, v. 2.0. If a copy of the MPL was not distributed with this
! file, You can obtain one at https://mozilla.org/MPL/2.0/.
!
<% @active.each do |int| %>
interface <%= int %>
 ipv6 ospf6 priority 0
!
<% end %>
<% @passive.each do |int| %>
interface <%= int %>
 ipv6 ospf6 passive
!
<% end unless @passive.nil? %>
router ospf6
 router-id <%= @ip %>
<% @active.each do |int| %>
 interface <%= int %> area <%= @area %>
<% end %>
<% @passive.each do |int| %>
 interface <%= int %> area <%= @area %>
<% end unless @passive.nil? %>
<% @prefixes.each do |prefix| %>
 area <%= @area %> range <%= prefix %>
<% end unless @prefixes.nil? %>
!
line vty

ospfd.conf.erb

! This Source Code Form is subject to the terms of the Mozilla Public
! License, v. 2.0. If a copy of the MPL was not distributed with this
! file, You can obtain one at https://mozilla.org/MPL/2.0/.
!
<% @active.each do |int| %>
interface <%= int %>
 ip ospf priority 0
!
<% end %>
router ospf
 ospf router-id <%= @ip %>
 log-adjacency-changes
<% @passive.each do |int| %>
 passive-interface <%= int %>
<% end unless @passive.nil? %>
<% @prefixes.each do |prefix| %>
 network <%= prefix %> area <%= @area %>
<% end unless @prefixes.nil? %>
 redistribute kernel
!
line vty

zebra.conf

! This Source Code Form is subject to the terms of the Mozilla Public
! License, v. 2.0. If a copy of the MPL was not distributed with this
! file, You can obtain one at https://mozilla.org/MPL/2.0/.
!
ip forwarding
!
line vty
!