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[Chassis][Voq]Configure midplane network on supervisor (#11725)

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Multi-asic Docker instances are created behind Docker's default bridge
which doesn't allow talking to other Docker instances that are in the
host network (like database-chassis).

On linecards, we configure midplane interfaces to let per-asic docker
containers talk to CHASSIS_DB on the supervisor through internal chassis
network.

On the supervisor we don't need to use chassis internal network, but we
still need a similar setup in order to allow fabric containers to talk
to database-chassis
This commit is contained in:
Maxime Lorrillere 2022-09-15 17:23:41 -07:00 committed by Ying Xie
parent a700ffdb3d
commit 458b12b4af
2 changed files with 16 additions and 5 deletions
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1
device/arista/x86_64-arista_7800_sup/chassisdb.conf
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@ -1,5 +1,6 @@
start_chassis_db=1
chassis_db_address=127.100.1.1
midplane_subnet=127.100.0.0/16
lag_id_start=1
lag_id_end=128

18
files/build_templates/docker_image_ctl.j2
View File

@ -170,16 +170,26 @@ function postStartAction()
ip netns exec "$NET_NS" ip addr add 127.0.0.1/16 dev lo
ip netns exec "$NET_NS" ip addr del 127.0.0.1/8 dev lo
slot_id=$(python3 -c 'import sonic_platform.platform; platform_chassis = sonic_platform.platform.Platform().get_chassis(); print(platform_chassis.get_my_slot())' 2>/dev/null)
supervisor_slot_id=$(python3 -c 'import sonic_platform.platform; platform_chassis = sonic_platform.platform.Platform().get_chassis(); print(platform_chassis.get_supervisor_slot())' 2>/dev/null)
# Create eth1 in database instance
if [[ "${slot_id}" == "${supervisor_slot_id}" ]]; then
ip link add name ns-eth1"$NET_NS" type veth peer name eth1@"$NET_NS"
ip link set dev eth1@"$NET_NS" master br1
ip link set dev eth1@"$NET_NS" up
else
ip link add name ns-eth1"$NET_NS" link eth1-midplane type macvlan mode bridge
fi
# Create eth1 in database instance
ip link set dev ns-eth1"$NET_NS" netns "$NET_NS"
ip netns exec "$NET_NS" ip link set ns-eth1"$NET_NS" name eth1
# Configure IP address and enable eth1
lc_slot_id=$(python3 -c 'import sonic_platform.platform; platform_chassis = sonic_platform.platform.Platform().get_chassis(); print(platform_chassis.get_my_slot())' 2>/dev/null)
lc_ip_address=`echo $midplane_subnet | awk -F. '{print $1 "." $2}'`.$lc_slot_id.$(($DEV + 10))
lc_subnet_mask=${midplane_subnet#*/}
ip netns exec "$NET_NS" ip addr add $lc_ip_address/$lc_subnet_mask dev eth1
slot_ip_address=`echo $midplane_subnet | awk -F. '{print $1 "." $2}'`.$slot_id.$(($DEV + 10))
slot_subnet_mask=${midplane_subnet#*/}
ip netns exec "$NET_NS" ip addr add $slot_ip_address/$slot_subnet_mask dev eth1
ip netns exec "$NET_NS" ip link set dev eth1 up
# Allow localnet routing on the new interfaces if midplane is using a