Add docker-router-advertiser to support IPv6 router advertisements

.gitignore

@@ -46,6 +46,7 @@ dockers/docker-fpm-quagga/Dockerfile
 dockers/docker-lldp-sv2/Dockerfile
 dockers/docker-orchagent/Dockerfile
 dockers/docker-platform-monitor/Dockerfile
+dockers/docker-router-advertiser/Dockerfile
 dockers/docker-snmp-sv2/Dockerfile
 dockers/docker-teamd/Dockerfile
 dockers/docker-sonic-mgmt/Dockerfile

dockers/docker-router-advertiser/Dockerfile.j2

@@ -0,0 +1,32 @@
+FROM docker-config-engine
+
+# Make apt-get non-interactive
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Update apt's cache of available packages
+RUN apt-get update
+
+# Install radvd Debian package
+RUN apt-get -y install radvd
+
+{% if docker_router_advertiser_debs.strip() -%}
+# Copy built Debian packages
+{%- for deb in docker_router_advertiser_debs.split(' ') %}
+COPY debs/{{ deb }} debs/
+{%- endfor %}
+
+# Install built Debian packages and implicitly install their dependencies
+{%- for deb in docker_router_advertiser_debs.split(' ') %}
+RUN dpkg_apt() { [ -f $1 ] && { dpkg -i $1 || apt-get -y install -f; } || return 1; }; dpkg_apt debs/{{ deb }}
+{%- endfor %}
+{%- endif %}
+
+# Clean up
+RUN apt-get clean -y; apt-get autoclean -y; apt-get autoremove -y
+RUN rm -rf /debs
+
+COPY ["start.sh", "/usr/bin/"]
+COPY ["docker-router-advertiser.supervisord.conf", "/etc/supervisor/conf.d/"]
+COPY ["radvd.conf.j2", "/usr/share/sonic/templates/"]
+
+ENTRYPOINT ["/usr/bin/supervisord"]

dockers/docker-router-advertiser/docker-router-advertiser.supervisord.conf

@@ -0,0 +1,28 @@
+[supervisord]
+logfile_maxbytes=1MB
+logfile_backups=2
+nodaemon=true
+
+[program:start.sh]
+command=/usr/bin/start.sh
+priority=1
+autostart=true
+autorestart=false
+stdout_logfile=syslog
+stderr_logfile=syslog
+
+[program:rsyslogd]
+command=/usr/sbin/rsyslogd -n
+priority=2
+autostart=false
+autorestart=false
+stdout_logfile=syslog
+stderr_logfile=syslog
+
+[program:radvd]
+command=/usr/sbin/radvd -n
+priority=3
+autostart=false
+autorestart=false
+stdout_logfile=syslog
+stderr_logfile=syslog

dockers/docker-router-advertiser/radvd.conf.j2

@@ -0,0 +1,37 @@
+{% block banner %}
+# =========== Managed by sonic-cfggen -- DO NOT edit manually! ====================
+# Generated by /usr/share/sonic/templates/radvd.conf.j2 using config DB data
+# File: /etc/radvd.conf
+#
+{% endblock banner %}
+# Config file for radvd, the router advertisement daemon
+# See man page for radvd.conf for descriptions of all available options
+#
+
+{# If our configuration has VLAN interfaces... #}
+{% if VLAN_INTERFACE %}
+{% for (name, prefix) in VLAN_INTERFACE %}
+{# If this VLAN has an IPv6 address... #}
+{% if prefix | ipv6 %}
+interface {{ name }}
+{
+    IgnoreIfMissing on;
+    AdvSendAdvert on;
+    MinRtrAdvInterval 200;
+    MaxRtrAdvInterval 600;
+    AdvManagedFlag on;
+    AdvOtherConfigFlag off;
+    AdvLinkMTU 9100;
+    AdvHomeAgentFlag off;
+    prefix {{ prefix | network }}/{{ prefix | prefixlen }} {
+        AdvOnLink on;
+        AdvAutonomous off;
+        AdvRouterAddr off;
+        AdvValidLifetime infinity;
+        AdvPreferredLifetime infinity;
+    };
+};
+
+{% endif %}
+{% endfor %}
+{% endif %}

dockers/docker-router-advertiser/start.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+# Generate /etc/radvd.conf config file
+sonic-cfggen -d -t /usr/share/sonic/templates/radvd.conf.j2 > /etc/radvd.conf
+
+rm -f /var/run/rsyslogd.pid
+
+supervisorctl start rsyslogd
+
+# Start the router advertiser
+supervisorctl start radvd

files/build_templates/router_advertiser.service.j2

@@ -0,0 +1,13 @@
+[Unit]
+Description=Router advertiser container
+Requires=docker.service
+After=swss.service
+
+[Service]
+User={{ sonicadmin_user }}
+ExecStartPre=/usr/bin/{{ docker_container_name }}.sh start
+ExecStart=/usr/bin/{{ docker_container_name }}.sh attach
+ExecStop=/usr/bin/{{ docker_container_name }}.sh stop
+
+[Install]
+WantedBy=multi-user.target

rules/docker-router-advertiser.mk

@@ -0,0 +1,12 @@
+# Docker image for router advertiser
+
+DOCKER_ROUTER_ADVERTISER = docker-router-advertiser.gz
+$(DOCKER_ROUTER_ADVERTISER)_PATH = $(DOCKERS_PATH)/docker-router-advertiser
+$(DOCKER_ROUTER_ADVERTISER)_LOAD_DOCKERS = $(DOCKER_CONFIG_ENGINE)
+SONIC_DOCKER_IMAGES += $(DOCKER_ROUTER_ADVERTISER)
+SONIC_INSTALL_DOCKER_IMAGES += $(DOCKER_ROUTER_ADVERTISER)
+
+
+$(DOCKER_ROUTER_ADVERTISER)_CONTAINER_NAME = radv
+$(DOCKER_ROUTER_ADVERTISER)_RUN_OPT += --net=host --privileged -t
+$(DOCKER_ROUTER_ADVERTISER)_RUN_OPT += -v /etc/sonic:/etc/sonic:ro