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[load_minigraph]: Add support to load default_config.json file #1228

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[load_minigraph]: Add support to load default_config.json file #1228

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39 changes: 38 additions & 1 deletion config/main.py
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Original file line number Diff line number Diff line change
Expand Up @@ -242,6 +242,22 @@ def _get_device_type():

return device_type

def _get_hwsku(config_db):
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We can remove this function here. Same function available in sonic_py_common get_hwsku

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@mlorrillere mlorrillere Feb 19, 2021 •
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get_hwsku in sonic_py_common does not support namespaces, it will always connect to the host redis instance.

Also, get_hwsku in sonic_py_common will be stuck because it will try to open a new connection to CONFIG_DB.

This can be revisited when sonic_py_common provides support for namespaces and existing connection.

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hwsku is for the whole device, wouldn't getting the hwsku form the host redis work will it change for each namespace/asic ?

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This would be the same hwsku for all namespace/asic. However we can't get it before minigraph.xml is parsed and CONFIG_DB is populated, so calling get_hwsku from sonic_py_common beforehand is not possible since CONFIG_DB will be empty.

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if config_db is empty then _get_hwsku won't return the correct hwsku also. I am trying to understand what the difference between _get_hwsku define here and get_hwsku in sonic_py_common

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_get_hwsku is called after minigraph.xml is parsed and CONFIG_DB is populated for the corresponding namespace CONFIG_DB initialized at line 1274, _get_hwsku is called at line 1287).

The difference with get_hwsku from sonic_py_common is that _get_hwsku here reuse the existing connection to CONFIG_DB. If we cann get_hwsku from sonic_py_common instead it will get stuck because we can't open multiple connections the same time.

"""
Get hwsku from CONFIG_DB

TODO: move to sonic-py-common
"""

metadata = config_db.get_table('DEVICE_METADATA')
if metadata and 'localhost' in metadata and 'hwsku' in metadata['localhost']:
return metadata['localhost']['hwsku']

click.echo("Could not get the hwsku from CONFIG_DB, setting hwsku to Unknown")
hwsku = 'Unknown'

return hwsku

def interface_alias_to_name(config_db, interface_alias):
"""Return default interface name if alias name is given as argument
"""
Expand Down Expand Up @@ -1284,11 +1300,13 @@ def load_minigraph(db, no_service_restart):
log.log_info("'load_minigraph' stopping services...")
_stop_services()

platform = device_info.get_platform()

# For Single Asic platform the namespace list has the empty string
# for mulit Asic platform the empty string to generate the config
# for host
namespace_list = [DEFAULT_NAMESPACE]
num_npus = multi_asic.get_num_asics()
num_npus = device_info.get_num_npus()
if num_npus > 1:
namespace_list += multi_asic.get_namespaces_from_linux()

Expand All @@ -1309,6 +1327,25 @@ def load_minigraph(db, no_service_restart):
else:
command = "{} -H -m --write-to-db {}".format(SONIC_CFGGEN_PATH, cfggen_namespace_option)
clicommon.run_command(command, display_cmd=True)

if namespace is DEFAULT_NAMESPACE:
npu_id = ''
else:
npu_id = device_info.get_npu_id_from_name(namespace)

# load default_config.json file from platform directory
default_config_file = os.path.join('/usr/share/sonic/device/', platform, npu_id, 'default_config.json')
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can you give an example what is present in 'default_config.json'

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I added the following example in the description:

{
    "DEVICE_METADATA": {
        "localhost": {
            "instance_name": "ASIC0",
            "chassis_db_address" : "240.127.1.1",
            "start_chassis_db" : "1",
            "asic_id": "06:00.0"
        }
    }
}

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As per PR sonic-net/sonic-buildimage#5991, for VOQ chassis systems the "asic_id" and "instance_name" are configured via minigraph.xml. Will these values from default_config.json be preferred over what is configured through minigraph?

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For VOQ chassis systems, we get "start_chassis_db" and "chassis_db_address" from chassisdb.conf from device specific directory (for example: https://github.com/Azure/sonic-buildimage/blob/master/device/arista/x86_64-arista_7800_sup/chassisdb.conf). These are needed before the database service is started in supervisor card. Having these in config_db is of no use. Also, if these are not used in multi-asic we should not have these in default_config.json.

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As per PR Azure/sonic-buildimage#5991, for VOQ chassis systems the "asic_id" and "instance_name" are configured via minigraph.xml. Will these values from default_config.json be preferred over what is configured through minigraph?

Both are still valid. If the platform has configuration in default_config.json it has to be static. If it is present in both files then default_config.json will override the value configured via minigraph.xml, which is fine.

The example above is probably incorrect once VoQ config using minigraph.xml is complete (PR5991), however asic_id is still required in this file as it is platform-dependent.

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For VOQ chassis systems, we get "start_chassis_db" and "chassis_db_address" from chassisdb.conf from device specific directory (for example: https://github.com/Azure/sonic-buildimage/blob/master/device/arista/x86_64-arista_7800_sup/chassisdb.conf). These are needed before the database service is started in supervisor card. Having these in config_db is of no use. Also, if these are not used in multi-asic we should not have these in default_config.json.

Right. Actually in the above example only asic_id is required as it is tied to each asic physically on the hardware. Other configurations can easily be set using minigraph.xml

if os.path.isfile(default_config_file):
command = "{} -j {} {} --write-to-db".format(SONIC_CFGGEN_PATH, default_config_file, cfggen_namespace_option)
clicommon.run_command(command, display_cmd=True)

hwsku = _get_hwsku(config_db)
# load default_config.json file from hwsku directory
default_config_file = os.path.join('/usr/share/sonic/device/', platform, hwsku, npu_id, 'default_config.json')
if os.path.isfile(default_config_file):
command = "{} -j {} {} --write-to-db".format(SONIC_CFGGEN_PATH, default_config_file, cfggen_namespace_option)
clicommon.run_command(command, display_cmd=True)

client.set(config_db.INIT_INDICATOR, 1)

# get the device type
Expand Down
53 changes: 49 additions & 4 deletions tests/config_test.py
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Original file line number Diff line number Diff line change
Expand Up @@ -18,16 +18,32 @@

import config.main as config

load_minigraph_command_output="""\
Stopping SONiC target ...
Running command: /usr/local/bin/sonic-cfggen -H -m --write-to-db
def get_load_minigraph_command_output(init_cfg=False, default_config=False):
load_minigraph_command_output="""\
Stopping SONiC target ..."""

if init_cfg:
load_minigraph_command_output += """
Running command: /usr/local/bin/sonic-cfggen -H -m -j /etc/sonic/init_cfg.json --write-to-db"""
else:
load_minigraph_command_output += """
Running command: /usr/local/bin/sonic-cfggen -H -m --write-to-db"""

if default_config:
load_minigraph_command_output += """
Running command: /usr/local/bin/sonic-cfggen -j /usr/share/sonic/device/x86_64-mlnx_msn3800-r0/default_config.json --write-to-db
Running command: /usr/local/bin/sonic-cfggen -j /usr/share/sonic/device/x86_64-mlnx_msn3800-r0/Arista-VM/default_config.json --write-to-db"""

load_minigraph_command_output += """
Running command: pfcwd start_default
Running command: config qos reload --no-dynamic-buffer
Restarting SONiC target ...
Reloading Monit configuration ...
Please note setting loaded from minigraph will be lost after system reboot. To preserve setting, run `config save`.
"""

return load_minigraph_command_output

def mock_run_command_side_effect(*args, **kwargs):
command = args[0]

Expand Down Expand Up @@ -55,9 +71,38 @@ def test_load_minigraph(self, get_cmd_module, setup_single_broadcom_asic):
print(result.output)
traceback.print_tb(result.exc_info[2])
assert result.exit_code == 0
assert "\n".join([l.rstrip() for l in result.output.split('\n')]) == load_minigraph_command_output
assert "\n".join([l.rstrip() for l in result.output.split('\n')]) == get_load_minigraph_command_output()
assert mock_run_command.call_count == 7

def test_load_minigraph_with_init_cfg(self, get_cmd_module, setup_single_broadcom_asic):
with mock.patch("utilities_common.cli.run_command", mock.MagicMock(side_effect=mock_run_command_side_effect)) as mock_run_command, \
mock.patch("os.path.isfile") as mock_isfile:
mock_isfile.side_effect = lambda filename: filename.endswith( "init_cfg.json" )
(config, show) = get_cmd_module
runner = CliRunner()
result = runner.invoke(config.config.commands["load_minigraph"], ["-y"])
print(result.exit_code)
print(result.output)
traceback.print_tb(result.exc_info[2])
assert result.exit_code == 0
assert "\n".join([l.rstrip() for l in result.output.split('\n')]) == get_load_minigraph_command_output( init_cfg=True )
assert mock_run_command.call_count == 7

def test_load_minigraph_with_default_config(self, get_cmd_module, setup_single_broadcom_asic):
with mock.patch("utilities_common.cli.run_command", mock.MagicMock(side_effect=mock_run_command_side_effect)) as mock_run_command, \
mock.patch("os.path.isfile") as mock_isfile:
mock_isfile.side_effect = lambda filename: filename.endswith( "default_config.json" )
(config, show) = get_cmd_module
runner = CliRunner()
result = runner.invoke(config.config.commands["load_minigraph"], ["-y"])
print(result.exit_code)
print(result.output)
traceback.print_tb(result.exc_info[2])
assert result.exit_code == 0
assert "\n".join([l.rstrip() for l in result.output.split('\n')]) == get_load_minigraph_command_output( default_config=True )
assert mock_run_command.call_count == 9


@classmethod
def teardown_class(cls):
os.environ['UTILITIES_UNIT_TESTING'] = "0"
Expand Down
1 change: 1 addition & 0 deletions tests/conftest.py
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Original file line number Diff line number Diff line change
Expand Up @@ -62,6 +62,7 @@ def set_mock_apis():
cwd = os.path.dirname(os.path.realpath(__file__))
config.asic_type = mock.MagicMock(return_value="broadcom")
config._get_device_type = mock.MagicMock(return_value="ToRRouter")
config._get_hwsku = mock.MagicMock(return_value="Arista-VM")

@pytest.fixture
def setup_qos_mock_apis():
Expand Down