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Add function to retrieve docker0 ipv4 and ipv6 addresses #15606

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Add function to retrieve docker0 ipv4 and ipv6 addresses #15606

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a24b9da
Add function to retrieve docker0 ipv4 and ipv6 addresses
SuvarnaMeenakshi Jun 23, 2023
9f17050
Add netifaces.
SuvarnaMeenakshi Jun 27, 2023
1de8503
Modify function name
SuvarnaMeenakshi Jun 27, 2023
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24 changes: 24 additions & 0 deletions src/sonic-py-common/sonic_py_common/multi_asic.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
import glob
import os
import subprocess
import netifaces

from natsort import natsorted
from swsscommon import swsscommon
Expand Down Expand Up @@ -484,3 +485,26 @@ def get_asic_presence_list():
# asic is asid id: asic0, asic1.... asicN. Get the numeric value.
asics_list.append(int(get_asic_id_from_name(asic)))
return asics_list

def get_docker0_ip():
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get_docker0_ip

get_docker0_ips

"""
@summary: This function will return docker0 ipv4 and ipv6 addresses
for multi_asic platform.
This function will return None for single asic platform.
@return: tuple containing docker0 ipv4 and ipv6 address
"""
docker0_v4 = None
docker0_v6 = None

# return (None, None) for single asic platform
if not is_multi_asic():
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is_multi_asic

Is it harmful to let single-asic return the proper ips?

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This helper function is added so that we could use this to get docker0 ip for multi-asic platform.
Most likely we will need docker0 information only for multi-asic platform.
For example, we want to update SNMP_AGENT_ADDRESS_CONFIG table in config_db with docker0 and mgmt IP in miniraph parser and we could avoid adding the single/multi-asic in minigraph parser if we ensure that required IP is passed from this helped function.

return (docker0_v4, docker0_v6)

interfaces = netifaces.interfaces()
if "docker0" in interfaces:
addresses = netifaces.ifaddresses("docker0")
if netifaces.AF_INET in addresses:
docker0_v4 = addresses[netifaces.AF_INET][0]['addr']
if netifaces.AF_INET6 in addresses:
docker0_v6 = addresses[netifaces.AF_INET6][0]['addr']
return (docker0_v4, docker0_v6)