[chassis] Add templates and code to support VoQ chassis iBGP peers (s…

…onic-net#5622)

This commit has following changes:

* Add templates and code to support VoQ chassis iBGP peers

* Add support to convert a new VoQChassisInternal element in the
   BGPSession element of the minigraph to a new BGP_VOQ_CHASSIS_NEIGHBOR 
   table in CONFIG_DB.
* Add a new set of "voq_chassis" templates to docker-fpm-frr
* Add a new BGP peer manager to bgpcfgd to add neighbors from the
  BGP_VOQ_CHASSIS_NEIGHBOR table using the voq_chassis templates.
* Add a test case for minigraph.py, making sure the VoQChassisInternal
  element creates a BGP_VOQ_CHASSIS_NEIGHBOR entry, but not if its
  value is "false".
* Add a set of test cases for the new voq_chassis templates in
  sonic-bgpcfgd tests.

Note that the templates expect the new
"bgp bestpath peer-type multipath-relax" bgpd configuration to be
available.

Signed-off-by: Joanne Mikkelson <jmmikkel@arista.com>

dockers/docker-fpm-frr/frr/bgpd/templates/voq_chassis/instance.conf.j2

@@ -0,0 +1,35 @@
+!
+! template: bgpd/templates/voq_chassis/instance.conf.j2
+!
+  bgp bestpath as-path multipath-relax
+  bgp bestpath peer-type multipath-relax
+!
+  neighbor {{ neighbor_addr }} peer-group VOQ_CHASSIS_PEER
+  neighbor {{ neighbor_addr }} remote-as {{ bgp_session['asn'] }}
+  neighbor {{ neighbor_addr }} description {{ bgp_session['name'] }}
+{# set the bgp neighbor timers if they have not default values #}
+{% if     (bgp_session['keepalive'] is defined and bgp_session['keepalive'] | int != 60)
+      or  (bgp_session['holdtime'] is defined  and bgp_session['holdtime']  | int != 180) %}
+  neighbor {{ neighbor_addr }} timers {{ bgp_session['keepalive'] | default("60") }} {{ bgp_session['holdtime'] | default("180") }}
+{% endif %}
+!
+{% if 'admin_status' in bgp_session and bgp_session['admin_status'] == 'down' or 'admin_status' not in bgp_session and 'default_bgp_status' in CONFIG_DB__DEVICE_METADATA['localhost'] and CONFIG_DB__DEVICE_METADATA['localhost']['default_bgp_status'] == 'down' %}
+  neighbor {{ neighbor_addr }} shutdown
+{% endif %}
+!
+  address-family ipv4
+{% if constants.bgp.maximum_paths.enabled is defined and constants.bgp.maximum_paths.enabled %}
+    maximum-paths ibgp {{ constants.bgp.maximum_paths.ipv4 | default(64) }}
+{% endif %}
+!
+  exit-address-family
+!
+  address-family ipv6
+{% if constants.bgp.maximum_paths.enabled is defined and constants.bgp.maximum_paths.enabled %}
+    maximum-paths ibgp {{ constants.bgp.maximum_paths.ipv6 | default(64) }}
+{% endif %}
+!
+  exit-address-family
+!
+! end of template: bgpd/templates/voq_chassis/instance.conf.j2
+!

dockers/docker-fpm-frr/frr/bgpd/templates/voq_chassis/peer-group.conf.j2

@@ -0,0 +1,23 @@
+!
+! template: bgpd/templates/voq_chassis/peer-group.conf.j2
+!
+  neighbor VOQ_CHASSIS_PEER peer-group
+  address-family ipv4
+{% if CONFIG_DB__DEVICE_METADATA['localhost']['type'] == 'ToRRouter' %}
+    neighbor VOQ_CHASSIS_PEER allowas-in 1
+{% endif %}
+    neighbor VOQ_CHASSIS_PEER activate
+    neighbor VOQ_CHASSIS_PEER addpath-tx-all-paths
+    neighbor VOQ_CHASSIS_PEER soft-reconfiguration inbound
+  exit-address-family
+  address-family ipv6
+{% if CONFIG_DB__DEVICE_METADATA['localhost']['type'] == 'ToRRouter' %}
+    neighbor VOQ_CHASSIS_PEER allowas-in 1
+{% endif %}
+    neighbor VOQ_CHASSIS_PEER activate
+    neighbor VOQ_CHASSIS_PEER addpath-tx-all-paths
+    neighbor VOQ_CHASSIS_PEER soft-reconfiguration inbound
+  exit-address-family
+!
+! end of template: bgpd/templates/voq_chassis/peer-group.conf.j2
+!

dockers/docker-fpm-frr/frr/bgpd/templates/voq_chassis/policies.conf.j2

@@ -0,0 +1,7 @@
+!
+! template: bgpd/templates/voq_chassis/policies.conf.j2
+!
+!
+!
+! end of template: bgpd/templates/voq_chassis/policies.conf.j2
+!

files/image_config/constants/constants.yml

@@ -54,3 +54,7 @@ constants:
         db_table: "BGP_PEER_RANGE"
         peer_group: "BGP_SPEAKER"
         template_dir: "dynamic"
+      voq_chassis: # peer_type
+        enabled: true
+        db_table: "BGP_VOQ_CHASSIS_NEIGHBOR"
+        template_dir: "voq_chassis"

src/sonic-bgpcfgd/bgpcfgd/main.py

@@ -43,13 +43,15 @@ def do_work():
         InterfaceMgr(common_objs, "CONFIG_DB", swsscommon.CFG_LOOPBACK_INTERFACE_TABLE_NAME),
         InterfaceMgr(common_objs, "CONFIG_DB", swsscommon.CFG_VLAN_INTF_TABLE_NAME),
         InterfaceMgr(common_objs, "CONFIG_DB", swsscommon.CFG_LAG_INTF_TABLE_NAME),
+        InterfaceMgr(common_objs, "CONFIG_DB", swsscommon.CFG_VOQ_INBAND_INTERFACE_TABLE_NAME),
         # State DB managers
         ZebraSetSrc(common_objs, "STATE_DB", swsscommon.STATE_INTERFACE_TABLE_NAME),
         # Peer Managers
         BGPPeerMgrBase(common_objs, "CONFIG_DB", swsscommon.CFG_BGP_NEIGHBOR_TABLE_NAME, "general", True),
         BGPPeerMgrBase(common_objs, "CONFIG_DB", swsscommon.CFG_BGP_INTERNAL_NEIGHBOR_TABLE_NAME, "internal", False),
         BGPPeerMgrBase(common_objs, "CONFIG_DB", "BGP_MONITORS", "monitors", False),
         BGPPeerMgrBase(common_objs, "CONFIG_DB", "BGP_PEER_RANGE", "dynamic", False),
+        BGPPeerMgrBase(common_objs, "CONFIG_DB", "BGP_VOQ_CHASSIS_NEIGHBOR", "voq_chassis", False),
         # AllowList Managers
         BGPAllowListMgr(common_objs, "CONFIG_DB", "BGP_ALLOWED_PREFIXES"),
         # BBR Manager

src/sonic-bgpcfgd/tests/data/voq_chassis/instance.conf/param_all.json

@@ -0,0 +1,22 @@
+{
+    "CONFIG_DB__DEVICE_METADATA": {
+        "localhost": {}
+    },
+    "neighbor_addr": "10.10.10.10",
+    "bgp_session": {
+        "asn": "555",
+        "name": "internal1",
+        "keepalive": "5",
+        "holdtime": "30",
+        "admin_status": "down"
+    },
+    "constants": {
+        "bgp": {
+            "maximum_paths": {
+                "enabled": "true",
+                "ipv4": "32",
+                "ipv6": "24"
+            }
+        }
+    }
+}

src/sonic-bgpcfgd/tests/data/voq_chassis/instance.conf/param_base.json

@@ -0,0 +1,17 @@
+{
+    "CONFIG_DB__DEVICE_METADATA": {
+        "localhost": {}
+    },
+    "neighbor_addr": "10.10.10.10",
+    "bgp_session": {
+        "asn": "555",
+        "name": "internal1"
+    },
+    "constants": {
+        "bgp": {
+            "maximum_paths": {
+                "enabled": "true"
+            }
+        }
+    }
+}

src/sonic-bgpcfgd/tests/data/voq_chassis/instance.conf/param_shutdown_1.json

@@ -0,0 +1,19 @@
+{
+    "CONFIG_DB__DEVICE_METADATA": {
+        "localhost": {
+            "default_bgp_status": "down"
+        }
+    },
+    "neighbor_addr": "10.10.10.10",
+    "bgp_session": {
+        "asn": "555",
+        "name": "internal1"
+    },
+    "constants": {
+        "bgp": {
+            "maximum_paths": {
+                "enabled": "true"
+            }
+        }
+    }
+}

src/sonic-bgpcfgd/tests/data/voq_chassis/instance.conf/param_shutdown_2.json

@@ -0,0 +1,19 @@
+{
+    "CONFIG_DB__DEVICE_METADATA": {
+        "localhost": {
+            "default_bgp_status": "up"
+        }
+    },
+    "neighbor_addr": "10.10.10.10",
+    "bgp_session": {
+        "asn": "555",
+        "name": "internal1"
+    },
+    "constants": {
+        "bgp": {
+            "maximum_paths": {
+                "enabled": "true"
+            }
+        }
+    }
+}

src/sonic-bgpcfgd/tests/data/voq_chassis/instance.conf/param_timers_1.json

@@ -0,0 +1,18 @@
+{
+    "CONFIG_DB__DEVICE_METADATA": {
+        "localhost": {}
+    },
+    "neighbor_addr": "10.10.10.10",
+    "bgp_session": {
+        "asn": "555",
+        "name": "internal1",
+        "keepalive": "5"
+    },
+    "constants": {
+        "bgp": {
+            "maximum_paths": {
+                "enabled": "true"
+            }
+        }
+    }
+}

src/sonic-bgpcfgd/tests/data/voq_chassis/instance.conf/param_timers_2.json

@@ -0,0 +1,18 @@
+{
+    "CONFIG_DB__DEVICE_METADATA": {
+        "localhost": {}
+    },
+    "neighbor_addr": "10.10.10.10",
+    "bgp_session": {
+        "asn": "555",
+        "name": "internal1",
+        "holdtime": "240"
+    },
+    "constants": {
+        "bgp": {
+            "maximum_paths": {
+                "enabled": "true"
+            }
+        }
+    }
+}

src/sonic-bgpcfgd/tests/data/voq_chassis/instance.conf/result_all.conf

@@ -0,0 +1,23 @@
+!
+! template: bgpd/templates/voq_chassis/instance.conf.j2
+!
+  bgp bestpath as-path multipath-relax
+  bgp bestpath peer-type multipath-relax
+!
+  neighbor 10.10.10.10 peer-group VOQ_CHASSIS_PEER
+  neighbor 10.10.10.10 remote-as 555
+  neighbor 10.10.10.10 description internal1
+  neighbor 10.10.10.10 timers 5 30
+  neighbor 10.10.10.10 shutdown
+  address-family ipv4
+    maximum-paths ibgp 32
+!
+  exit-address-family
+!
+  address-family ipv6
+    maximum-paths ibgp 24
+!
+  exit-address-family
+!
+! end of template: bgpd/templates/voq_chassis/instance.conf.j2
+!

src/sonic-bgpcfgd/tests/data/voq_chassis/instance.conf/result_base.conf

@@ -0,0 +1,21 @@
+!
+! template: bgpd/templates/voq_chassis/instance.conf.j2
+!
+  bgp bestpath as-path multipath-relax
+  bgp bestpath peer-type multipath-relax
+!
+  neighbor 10.10.10.10 peer-group VOQ_CHASSIS_PEER
+  neighbor 10.10.10.10 remote-as 555
+  neighbor 10.10.10.10 description internal1
+  address-family ipv4
+    maximum-paths ibgp 64
+!
+  exit-address-family
+!
+  address-family ipv6
+    maximum-paths ibgp 64
+!
+  exit-address-family
+!
+! end of template: bgpd/templates/voq_chassis/instance.conf.j2
+!

src/sonic-bgpcfgd/tests/data/voq_chassis/instance.conf/result_shutdown_1.conf

@@ -0,0 +1,22 @@
+!
+! template: bgpd/templates/voq_chassis/instance.conf.j2
+!
+  bgp bestpath as-path multipath-relax
+  bgp bestpath peer-type multipath-relax
+!
+  neighbor 10.10.10.10 peer-group VOQ_CHASSIS_PEER
+  neighbor 10.10.10.10 remote-as 555
+  neighbor 10.10.10.10 description internal1
+  neighbor 10.10.10.10 shutdown
+  address-family ipv4
+    maximum-paths ibgp 64
+!
+  exit-address-family
+!
+  address-family ipv6
+    maximum-paths ibgp 64
+!
+  exit-address-family
+!
+! end of template: bgpd/templates/voq_chassis/instance.conf.j2
+!

src/sonic-bgpcfgd/tests/data/voq_chassis/instance.conf/result_shutdown_2.conf

@@ -0,0 +1,21 @@
+!
+! template: bgpd/templates/voq_chassis/instance.conf.j2
+!
+  bgp bestpath as-path multipath-relax
+  bgp bestpath peer-type multipath-relax
+!
+  neighbor 10.10.10.10 peer-group VOQ_CHASSIS_PEER
+  neighbor 10.10.10.10 remote-as 555
+  neighbor 10.10.10.10 description internal1
+  address-family ipv4
+    maximum-paths ibgp 64
+!
+  exit-address-family
+!
+  address-family ipv6
+    maximum-paths ibgp 64
+!
+  exit-address-family
+!
+! end of template: bgpd/templates/voq_chassis/instance.conf.j2
+!

src/sonic-bgpcfgd/tests/data/voq_chassis/instance.conf/result_timers_1.conf

@@ -0,0 +1,22 @@
+!
+! template: bgpd/templates/voq_chassis/instance.conf.j2
+!
+  bgp bestpath as-path multipath-relax
+  bgp bestpath peer-type multipath-relax
+!
+  neighbor 10.10.10.10 peer-group VOQ_CHASSIS_PEER
+  neighbor 10.10.10.10 remote-as 555
+  neighbor 10.10.10.10 description internal1
+  neighbor 10.10.10.10 timers 5 180
+  address-family ipv4
+    maximum-paths ibgp 64
+!
+  exit-address-family
+!
+  address-family ipv6
+    maximum-paths ibgp 64
+!
+  exit-address-family
+!
+! end of template: bgpd/templates/voq_chassis/instance.conf.j2
+!

src/sonic-bgpcfgd/tests/data/voq_chassis/instance.conf/result_timers_2.conf

@@ -0,0 +1,22 @@
+!
+! template: bgpd/templates/voq_chassis/instance.conf.j2
+!
+  bgp bestpath as-path multipath-relax
+  bgp bestpath peer-type multipath-relax
+!
+  neighbor 10.10.10.10 peer-group VOQ_CHASSIS_PEER
+  neighbor 10.10.10.10 remote-as 555
+  neighbor 10.10.10.10 description internal1
+  neighbor 10.10.10.10 timers 60 240
+  address-family ipv4
+    maximum-paths ibgp 64
+!
+  exit-address-family
+!
+  address-family ipv6
+    maximum-paths ibgp 64
+!
+  exit-address-family
+!
+! end of template: bgpd/templates/voq_chassis/instance.conf.j2
+!

src/sonic-bgpcfgd/tests/data/voq_chassis/peer-group.conf/param_all.json

@@ -0,0 +1,7 @@
+{
+    "CONFIG_DB__DEVICE_METADATA": {
+        "localhost": {
+            "type": "ToRRouter"
+        }
+    }
+}

src/sonic-bgpcfgd/tests/data/voq_chassis/peer-group.conf/param_base.json

@@ -0,0 +1,5 @@
+{
+    "CONFIG_DB__DEVICE_METADATA": {
+        "localhost": {}
+    }
+}

src/sonic-bgpcfgd/tests/data/voq_chassis/peer-group.conf/result_all.conf

@@ -0,0 +1,19 @@
+!
+! template: bgpd/templates/voq_chassis/peer-group.conf.j2
+!
+  neighbor VOQ_CHASSIS_PEER peer-group
+  address-family ipv4
+    neighbor VOQ_CHASSIS_PEER allowas-in 1
+    neighbor VOQ_CHASSIS_PEER activate
+    neighbor VOQ_CHASSIS_PEER addpath-tx-all-paths
+    neighbor VOQ_CHASSIS_PEER soft-reconfiguration inbound
+  exit-address-family
+  address-family ipv6
+    neighbor VOQ_CHASSIS_PEER allowas-in 1
+    neighbor VOQ_CHASSIS_PEER activate
+    neighbor VOQ_CHASSIS_PEER addpath-tx-all-paths
+    neighbor VOQ_CHASSIS_PEER soft-reconfiguration inbound
+  exit-address-family
+!
+! end of template: bgpd/templates/voq_chassis/peer-group.conf.j2
+!