Load the database global_db only once for show cli (sonic-net#1712)

Introduce a new function `load_db_config()`. This function will load the global database file or database config file based on the platform.

acl_loader/main.py

@@ -9,9 +9,9 @@
 import tabulate
 import pyangbind.lib.pybindJSON as pybindJSON
 from natsort import natsorted
-from sonic_py_common import device_info, multi_asic
-from swsscommon.swsscommon import SonicV2Connector, ConfigDBConnector, SonicDBConfig
-
+from sonic_py_common import multi_asic
+from swsscommon.swsscommon import SonicV2Connector, ConfigDBConnector
+from utilities_common.general import load_db_config
 
 def info(msg):
     click.echo(click.style("Info: ", fg='cyan') + click.style(str(msg), fg='green'))
@@ -116,11 +116,8 @@ def __init__(self):
         self.rules_db_info = {}
         self.rules_info = {}
 
-        if multi_asic.is_multi_asic():
-            # Load global db config
-            SonicDBConfig.load_sonic_global_db_config()
-        else:
-            SonicDBConfig.initialize()
+        # Load database config files
+        load_db_config()
 
         self.sessions_db_info = {}
         self.configdb = ConfigDBConnector()
@@ -146,7 +143,7 @@ def __init__(self):
 
         # Getting all front asic namespace and correspding config and state DB connector
 
-        namespaces = device_info.get_all_namespaces()
+        namespaces = multi_asic.get_all_namespaces()
         for front_asic_namespaces in namespaces['front_ns']:
             self.per_npu_configdb[front_asic_namespaces] = ConfigDBConnector(use_unix_socket_path=True, namespace=front_asic_namespaces)
             self.per_npu_configdb[front_asic_namespaces].connect()

config/main.py

@@ -22,11 +22,13 @@
 from sonic_py_common import device_info, multi_asic
 from sonic_py_common.interface import get_interface_table_name, get_port_table_name
 from utilities_common import util_base
-from swsscommon.swsscommon import SonicV2Connector, ConfigDBConnector, SonicDBConfig
+from swsscommon.swsscommon import SonicV2Connector, ConfigDBConnector
 from utilities_common.db import Db
 from utilities_common.intf_filter import parse_interface_in_filter
 from utilities_common import bgp_util
 import utilities_common.cli as clicommon
+from utilities_common.general import load_db_config
+
 from .utils import log
 
 from . import aaa
@@ -952,12 +954,8 @@ def config(ctx):
     except (KeyError, TypeError):
         raise click.Abort()
 
-    # Load the global config file database_global.json once.
-    num_asic = multi_asic.get_num_asics()
-    if num_asic > 1:
-        SonicDBConfig.load_sonic_global_db_config()
-    else:
-        SonicDBConfig.initialize()
+    # Load database config files
+    load_db_config()
 
     if os.geteuid() != 0:
         exit("Root privileges are required for this operation")

crm/main.py

@@ -1,11 +1,12 @@
 #!/usr/bin/env python3
 
 import click
-from swsscommon.swsscommon import ConfigDBConnector, SonicDBConfig
+from swsscommon.swsscommon import ConfigDBConnector
 from tabulate import tabulate
-from utilities_common import multi_asic as multi_asic_util
-from sonic_py_common import multi_asic
 
+from sonic_py_common import multi_asic
+from utilities_common.general import load_db_config
+from utilities_common import multi_asic as multi_asic_util
 class Crm:
     def __init__(self, db=None):
         self.cli_mode = None
@@ -213,13 +214,8 @@ def cli(ctx):
     # Use the db object if given as input.
     db = None if ctx.obj is None else ctx.obj.cfgdb
 
-    # Note: SonicDBConfig may be already initialized in unit test, then skip
-    if not SonicDBConfig.isInit():
-        if multi_asic.is_multi_asic():
-            # Load the global config file database_global.json once.
-            SonicDBConfig.load_sonic_global_db_config()
-        else:
-            SonicDBConfig.initialize()
+    # Load database config files
+    load_db_config()
 
     context = {
         "crm": Crm(db)

scripts/ipintutil

@@ -12,6 +12,7 @@ from tabulate import tabulate
 from sonic_py_common import multi_asic
 from swsscommon import swsscommon
 from utilities_common import constants
+from utilities_common.general import load_db_config
 from utilities_common import multi_asic as multi_asic_util
 
 
@@ -262,7 +263,7 @@ def main():
     else:
         sys.exit("Invalid argument -a {}".format(args.address_family))
 
-    swsscommon.SonicDBConfig.load_sonic_global_db_config()
+    load_db_config()
     ip_intfs = get_ip_intfs(af, namespace, display)
     display_ip_intfs(ip_intfs)
 

scripts/lldpshow

@@ -25,8 +25,9 @@ import subprocess
 import sys
 import xml.etree.ElementTree as ET
 
-from sonic_py_common import device_info, multi_asic
-from swsscommon.swsscommon import ConfigDBConnector, SonicDBConfig
+from sonic_py_common import device_info
+from swsscommon.swsscommon import ConfigDBConnector
+from utilities_common.general import load_db_config
 from tabulate import tabulate
 
 BACKEND_ASIC_INTERFACE_NAME_PREFIX = 'Ethernet-BP'
@@ -48,10 +49,8 @@ class Lldpshow(object):
         # if further capability type is supported like WLAN, can just add the tag definition here
         self.ctags = {'Router': 'R', 'Bridge': 'B'}
 
-        if multi_asic.is_multi_asic():
-            SonicDBConfig.load_sonic_global_db_config()
-        else:
-            SonicDBConfig.initialize()
+        # Load database config files
+        load_db_config()
 
         # For multi-asic platforms we will get only front-panel interface to display
         namespaces = device_info.get_all_namespaces()

scripts/portconfig

@@ -37,7 +37,8 @@ try:
 except KeyError:
     pass
 
-from swsscommon.swsscommon import ConfigDBConnector, SonicDBConfig, SonicV2Connector
+from swsscommon.swsscommon import ConfigDBConnector, SonicV2Connector
+from utilities_common.general import load_db_config
 
 # APPL_DB constants
 PORT_TABLE_NAME = "PORT"
@@ -246,11 +247,8 @@ def main():
                         help = 'port advertised interface types', default=None)
     args = parser.parse_args()
 
-    if args.namespace is not None:
-        SonicDBConfig.load_sonic_global_db_config(namespace=args.namespace)
-    else:
-        SonicDBConfig.initialize()
-
+    # Load database config files
+    load_db_config()
     try:
         port = portconfig(args.verbose, args.port, args.namespace)
         if args.list:

show/main.py

@@ -14,6 +14,7 @@
 from utilities_common import util_base
 from utilities_common.db import Db
 import utilities_common.constants as constants
+from utilities_common.general import load_db_config
 
 from . import acl
 from . import bgp_common
@@ -149,6 +150,8 @@ def is_gearbox_configured():
 def cli(ctx):
     """SONiC command line - 'show' command"""
 
+    # Load database config files
+    load_db_config()
     ctx.obj = Db()
 
 

utilities_common/cli.py

@@ -11,6 +11,7 @@
 from natsort import natsorted
 from sonic_py_common import multi_asic
 from utilities_common.db import Db
+from utilities_common.general import load_db_config
 
 VLAN_SUB_INTERFACE_SEPARATOR = '.'
 
@@ -118,6 +119,8 @@ class InterfaceAliasConverter(object):
 
     def __init__(self, db=None):
 
+        # Load database config files
+        load_db_config()
         if db is None:
             self.port_dict = multi_asic.get_port_table()
         else:

utilities_common/general.py

@@ -2,6 +2,9 @@
 import importlib.util
 import sys
 
+from sonic_py_common.multi_asic import is_multi_asic
+from swsscommon import swsscommon
+
 def load_module_from_source(module_name, file_path):
     """
     This function will load the Python source file specified by <file_path>
@@ -15,3 +18,16 @@ def load_module_from_source(module_name, file_path):
     sys.modules[module_name] = module
 
     return module
+
+def load_db_config():
+    '''
+    Load the correct database config file:
+     - database_global.json for multi asic
+     - database_config.json for single asic
+    '''
+    if is_multi_asic():
+        if not swsscommon.SonicDBConfig.isGlobalInit():
+            swsscommon.SonicDBConfig.load_sonic_global_db_config()
+    else:
+        if not swsscommon.SonicDBConfig.isInit():
+            swsscommon.SonicDBConfig.load_sonic_db_config()