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[BGPD]: add bgp dynamic neighbor configuration #708

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merged 5 commits into from
Jun 22, 2017
Merged

[BGPD]: add bgp dynamic neighbor configuration #708

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ec004b1
add bgp dynamic neighbor configuration
Jun 15, 2017
17f7dc8
[bgpd]: update as comments
Jun 19, 2017
6e80fbd
update as comment
Jun 20, 2017
48a4971
update to deployment_id_asn_map
Jun 21, 2017
d7791fd
minor change
Jun 21, 2017
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17 changes: 17 additions & 0 deletions dockers/docker-fpm-quagga/bgpd.conf.j2
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,10 @@ log facility local4
!
! bgp multiple-instance
!
route-map FROM_BGP_SPEAKER_V4 permit 10
!
route-map TO_BGP_SPEAKER_V4 deny 10
!
router bgp {{ minigraph_bgp_asn }}
bgp log-neighbor-changes
bgp bestpath as-path multipath-relax
Expand Down Expand Up @@ -65,6 +69,19 @@ router bgp {{ minigraph_bgp_asn }}
{% endif %}
{% endfor %}
{% endblock bgp_sessions %}
{% block bgp_peers_with_range %}
{% for bgp_peer in minigraph_bgp_peers_with_range %}
neighbor {{ bgp_peer['name'] }} peer-group
neighbor {{ bgp_peer['name'] }} passive
neighbor {{ bgp_peer['name'] }} remote-as {{deployment_id_asn_map[deployment_id] }}
neighbor {{ bgp_peer['name'] }} ebgp-multihop 255
neighbor {{ bgp_peer['name'] }} soft-reconfiguration inbound
neighbor {{ bgp_peer['name'] }} update-source Loopback0
neighbor {{ bgp_peer['name'] }} route-map FROM_BGP_SPEAKER_V4 in
neighbor {{ bgp_peer['name'] }} route-map TO_BGP_SPEAKER_V4 out
bgp listen range {{ bgp_peer['range'] }} peer-group {{ bgp_peer['name'] }}
{% endfor %}
{% endblock bgp_peers_with_range %}
!
{% if minigraph_bgp_asn is not none %}
maximum-paths 64
Expand Down
4 changes: 2 additions & 2 deletions dockers/docker-fpm-quagga/start.sh
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Expand Up @@ -2,9 +2,9 @@

mkdir -p /etc/quagga
if [ -f /etc/sonic/bgp_admin.yml ]; then
sonic-cfggen -m /etc/sonic/minigraph.xml -y /etc/sonic/bgp_admin.yml -t /usr/share/sonic/templates/bgpd.conf.j2 > /etc/quagga/bgpd.conf
sonic-cfggen -m /etc/sonic/minigraph.xml -y /etc/sonic/bgp_admin.yml -y /etc/sonic/deploymentId_asn_map.yml -t /usr/share/sonic/templates/bgpd.conf.j2 > /etc/quagga/bgpd.conf
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@taoyl-ms taoyl-ms Jun 19, 2017 •
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Do we allow the case that deploymentId_asn_map.yml does not exist? -y option will fail when the specified file does not exist so we'll need to do manual check beforehand.

I plan to add a -Y option into sonic-cfggen that silently ignore it when yml file does not exist, but that's not happened yet.

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I don't think we will allow the case that deploymentId_asn_map doesn't exist since we will copy a sample deploymentId_asn_map.yml when building the debian package (as what we have done for snmp.yml). I don't think we do manual check for snmp.yml (correct me if I am wrong). So we might don't have to check for this yml file as well?

else
sonic-cfggen -m /etc/sonic/minigraph.xml -t /usr/share/sonic/templates/bgpd.conf.j2 > /etc/quagga/bgpd.conf
sonic-cfggen -m /etc/sonic/minigraph.xml -y /etc/sonic/deploymentId_asn_map.yml -t /usr/share/sonic/templates/bgpd.conf.j2 > /etc/quagga/bgpd.conf
fi
sonic-cfggen -m /etc/sonic/minigraph.xml -t /usr/share/sonic/templates/zebra.conf.j2 > /etc/quagga/zebra.conf

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3 changes: 3 additions & 0 deletions files/build_templates/sonic_debian_extension.j2
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Expand Up @@ -138,6 +138,9 @@ sudo bash -c "echo ' all: off' >> $FILESYSTEM_ROOT/etc/sonic/bgp_admin.yml"
# Copy SNMP configuration files
sudo cp $IMAGE_CONFIGS/snmp/snmp.yml $FILESYSTEM_ROOT/etc/sonic/

# Copy ASN configuration files
sudo cp $IMAGE_CONFIGS/asn/deploymentId_asn_map.yml $FILESYSTEM_ROOT/etc/sonic/

# Copy sudoers configuration file
sudo cp $IMAGE_CONFIGS/sudoers/sudoers $FILESYSTEM_ROOT/etc/

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2 changes: 2 additions & 0 deletions files/image_config/asn/deployment_id_asn_map.yml
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@@ -0,0 +1,2 @@
deployment_id_asn_map:
"1" : 12345
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Use a private ASN? 65432 or something like that.

26 changes: 22 additions & 4 deletions src/sonic-config-engine/minigraph.py
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Expand Up @@ -244,6 +244,7 @@ def parse_dpg(dpg, hname):
def parse_cpg(cpg, hname):
bgp_sessions = []
myasn = None
bgp_peers_with_range = []
for child in cpg:
tag = child.tag
if tag == str(QName(ns, "PeeringSessions")):
Expand All @@ -270,12 +271,22 @@ def parse_cpg(cpg, hname):
hostname = router.find(str(QName(ns1, "Hostname"))).text
if hostname == hname:
myasn = int(asn)
peers = router.find(str(QName(ns1, "Peers")))
for bgpPeer in peers.findall(str(QName(ns, "BGPPeer"))):
addr = bgpPeer.find(str(QName(ns, "Address"))).text
if bgpPeer.find(str(QName(ns1, "PeersRange"))) is not None:
name = bgpPeer.find(str(QName(ns1, "Name"))).text
ip_range = bgpPeer.find(str(QName(ns1, "PeersRange"))).text
bgp_peers_with_range.append({
'name': name,
'ip_range': ip_range
})
else:
for bgp_session in bgp_sessions:
if hostname == bgp_session['name']:
bgp_session['asn'] = int(asn)

return bgp_sessions, myasn
return bgp_sessions, myasn, bgp_peers_with_range


def parse_meta(meta, hname):
Expand All @@ -284,6 +295,7 @@ def parse_meta(meta, hname):
ntp_servers = []
mgmt_routes = []
erspan_dst = []
deployment_id = None
device_metas = meta.find(str(QName(ns, "Devices")))
for device in device_metas.findall(str(QName(ns1, "DeviceMetadata"))):
if device.find(str(QName(ns1, "Name"))).text == hname:
Expand All @@ -302,7 +314,9 @@ def parse_meta(meta, hname):
mgmt_routes = value_group
elif name == "ErspanDestinationIpv4":
erspan_dst = value_group
return syslog_servers, dhcp_servers, ntp_servers, mgmt_routes, erspan_dst
elif name == "DeploymentId":
deployment_id = value
return syslog_servers, dhcp_servers, ntp_servers, mgmt_routes, erspan_dst, deployment_id


def get_console_info(devices, dev, port):
Expand Down Expand Up @@ -396,6 +410,8 @@ def parse_xml(filename, platform=None, port_config_file=None):
ntp_servers = []
mgmt_routes = []
erspan_dst = []
bgp_peers_with_range = None
deployment_id = None

hwsku_qn = QName(ns, "HwSku")
hostname_qn = QName(ns, "Hostname")
Expand All @@ -411,13 +427,13 @@ def parse_xml(filename, platform=None, port_config_file=None):
if child.tag == str(QName(ns, "DpgDec")):
(intfs, lo_intfs, mgmt_intf, vlans, pcs, acls) = parse_dpg(child, hostname)
elif child.tag == str(QName(ns, "CpgDec")):
(bgp_sessions, bgp_asn) = parse_cpg(child, hostname)
(bgp_sessions, bgp_asn, bgp_peers_with_range) = parse_cpg(child, hostname)
elif child.tag == str(QName(ns, "PngDec")):
(neighbors, devices, console_dev, console_port, mgmt_dev, mgmt_port) = parse_png(child, hostname)
elif child.tag == str(QName(ns, "UngDec")):
(u_neighbors, u_devices, _, _, _, _) = parse_png(child, hostname)
elif child.tag == str(QName(ns, "MetadataDeclaration")):
(syslog_servers, dhcp_servers, ntp_servers, mgmt_routes, erspan_dst) = parse_meta(child, hostname)
(syslog_servers, dhcp_servers, ntp_servers, mgmt_routes, erspan_dst, deployment_id) = parse_meta(child, hostname)

Tree = lambda: defaultdict(Tree)

Expand All @@ -428,6 +444,7 @@ def parse_xml(filename, platform=None, port_config_file=None):
# TODO: alternatively (preferred), implement class containers for multiple-attribute entries, enabling sort by attr
results['minigraph_bgp'] = sorted(bgp_sessions, key=lambda x: x['addr'])
results['minigraph_bgp_asn'] = bgp_asn
results['minigraph_bgp_peers_with_range'] = bgp_peers_with_range
# TODO: sort does not work properly on all interfaces of varying lengths. Need to sort by integer group(s).

phyport_intfs = []
Expand Down Expand Up @@ -466,6 +483,7 @@ def parse_xml(filename, platform=None, port_config_file=None):
results['ntp_servers'] = ntp_servers
results['forced_mgmt_routes'] = mgmt_routes
results['erspan_dst'] = erspan_dst
results['deployment_id'] = deployment_id

return results

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Could you add a sample minigraph with bgp peers and corresponding test to the test folder?

Expand Down
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