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Implement a health check for SONiC to enable the measurement of its startup time #195

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Implement a health check for SONiC to enable the measurement of its startup time #195

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4 changes: 4 additions & 0 deletions images/sonic/Dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -5,10 +5,12 @@ ENV LIBGUESTFS_BACKEND=direct
RUN apt-get update && \
apt-get --no-install-recommends install --yes \
curl \
libpcap0.8 \
linux-image-cloud-amd64 \
net-tools \
python3 \
python3-guestfs \
python3-scapy \
qemu-system-x86 \
telnet

Expand All @@ -18,3 +20,5 @@ COPY --from=ghcr.io/metal-stack/mini-lab-sonic:base /frr-pythontools.deb /frr-py
ENTRYPOINT ["/launch.py"]

COPY config_db.json mirror_tap_to_eth.sh launch.py /

HEALTHCHECK --start-period=10s --interval=5s --retries=20 CMD test -f /healthy
19 changes: 19 additions & 0 deletions images/sonic/launch.py
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,9 @@
import guestfs
from guestfs import GuestFS

from scapy.all import sniff
from scapy.contrib.lldp import LLDPDU, LLDPDUChassisID

BASE_IMG = '/sonic-vs.img'


Expand Down Expand Up @@ -165,6 +168,14 @@ def main():
logger.info('Start QEMU')
vm.start()

# SONiC will start sending LLDP packets after PortConfigDone is set in APPL database
logger.info('Wait until port configuration is done')
sniff(iface="eth0", filter="ether proto 0x88cc", stop_filter=is_port_configuration_done, store=0)

logger.info('Port configuration is done')
with open('/healthy', 'w'):
pass

logger.info('Wait until QEMU is terminated')
vm.wait()

Expand Down Expand Up @@ -215,5 +226,13 @@ def get_default_gateway() -> str:
return socket.inet_ntoa(struct.pack("<L", int(fields[2], 16)))


def is_port_configuration_done(packet):
if packet.haslayer(LLDPDUChassisID):
chassis_id_tlv = packet.getlayer(LLDPDUChassisID)
if chassis_id_tlv.subtype == LLDPDUChassisID.SUBTYPE_MAC_ADDRESS and chassis_id_tlv.id == get_mac_address('eth0'):
return True
return False


if __name__ == '__main__':
main()