sonic-buildimage/dockers/docker-database/flush_unused_database

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#!/usr/bin/python
import swsssdk
import redis
import subprocess
import time
while(True):
output = subprocess.Popen(['sonic-db-cli', 'PING'], stdout=subprocess.PIPE).communicate()[0]
if 'PONG' in output:
break
time.sleep(1)
instlists = swsssdk.SonicDBConfig.get_instancelist()
for instname, v in instlists.items():
insthost = v['hostname']
instsocket = v['unix_socket_path']
dblists = swsssdk.SonicDBConfig.get_dblist()
for dbname in dblists:
dbid = swsssdk.SonicDBConfig.get_dbid(dbname)
dbinst = swsssdk.SonicDBConfig.get_instancename(dbname)
# this DB is on current instance, skip flush
if dbinst == instname:
continue
r = redis.Redis(host=insthost, unix_socket_path=instsocket, db=dbid)
r.flushdb()