Let bgp docker generate configuration by itself

Author: taoyl-ms

dockers/docker-bgp/Dockerfile

@@ -3,11 +3,15 @@ FROM docker-base
 COPY deps/quagga_*.deb /deps/
 RUN dpkg_apt() { [ -f $1 ] && { dpkg -i $1 || apt-get -y install -f; } || return 1; } &&        \
     dpkg_apt /deps/quagga_*.deb &&                                                              \
+    apt-get update &&                                                                           \
+    apt-get -y install -f python-jinja2 python-netaddr python-ipaddr python-lxml &&             \
     apt-get clean -y && apt-get autoclean -y && apt-get autoremove -y &&                        \
     rm -rf /deps
 
 COPY daemons /etc/quagga/
+COPY ["*.j2", "config.sh", "template_list", "*.py", "/etc/swss/"]
 
 ENTRYPOINT service rsyslog start    \
+    && /etc/swss/config.sh          \
     && service quagga start         \
     && /bin/bash

dockers/docker-bgp/bgpd.conf.j2

@@ -0,0 +1,63 @@
+!
+{% block banner %}
+! =========== Managed by Ansible DO NOT EDIT! ========================
+! generated by templates/quagga/bgpd.conf.j2 using minigraph_facts.py
+! file: bgpd.conf
+!
+{% endblock banner %}
+!
+{% block system_init %}
+hostname {{ inventory_hostname }}
+password zebra
+log syslog informational
+log facility local4
+! enable password {# {{ en_passwd }} TODO: param needed #}
+{% endblock system_init %}
+!
+{% block bgp_init %}
+!
+! bgp multiple-instance
+!
+router bgp {{ minigraph_bgp_asn }}
+  bgp log-neighbor-changes
+  bgp bestpath as-path multipath-relax
+{# TODO: use lo[0] for backward compatibility, will revisit the case with multiple lo interfaces #}
+  bgp router-id {{ minigraph_lo_interfaces[0]['addr'] }}
+{# advertise loopback #}
+{% for lo in minigraph_lo_interfaces %}
+{% if lo['addr'] | ipv4 %}
+  network {{ lo['addr'] }}/32
+{% elif lo['addr'] | ipv6 %}
+  address-family ipv6
+    network {{ lo['addr'] }}/128
+  exit-address-family
+{% endif %}
+{% endfor %}
+{% endblock bgp_init %}
+{% block vlan_advertisement %}
+{% for interface in minigraph_interfaces %}
+{% if interface['name'].startswith('Vlan') %}
+  network {{ interface['subnet'] }}
+{% endif %}
+{% endfor %}
+{% endblock vlan_advertisement %}
+{% block bgp_sessions %}
+{% for bgp_session in minigraph_bgp %}
+{% if bgp_session['asn'] != 0 %}
+  neighbor {{ bgp_session['addr'] }} remote-as {{ bgp_session['asn'] }}
+  neighbor {{ bgp_session['addr'] }} description {{ bgp_session['name'] }}
+{% if bgp_session['addr'] | ipv6 %}
+  address-family ipv6
+    neighbor {{ bgp_session['addr'] }} activate
+    maximum-paths 64
+  exit-address-family
+{% endif %}
+{% endif %}
+{% endfor %}
+{% endblock bgp_sessions %}
+!
+maximum-paths 64
+!
+route-map ISOLATE permit 10
+set as-path prepend {{ minigraph_bgp_asn }}
+!

dockers/docker-bgp/config.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+cd /etc/swss
+
+awk '{system("python render_config.py -m /etc/swss/minigraph.xml "$1 ">"$2" && chown "$3" "$2" && chmod "$4" "$2)}' template_list 
+

dockers/docker-bgp/isolate.j2

@@ -0,0 +1,20 @@
+#!/bin/bash
+## vtysh only accepts script in stdin, so cannot be directly used in shebang
+## Cut the tail of this script and feed vtysh stdin
+sed -n -e '9,$p' < "$0" | vtysh "$@"
+## Exit with vtysh return code
+exit $?
+
+## vtysh script start from next line, which line number MUST eqaul in 'sed' command above
+
+configure terminal
+  router bgp {{ minigraph_bgp_asn }}
+{% for bgp_session in minigraph_bgp %}
+    neighbor {{ bgp_session['addr'] }} route-map ISOLATE out
+{% endfor %}
+  exit
+exit
+
+{% for bgp_session in minigraph_bgp %}
+clear ip bgp {{ bgp_session['addr'] }} soft out
+{% endfor %}