95 lines
2.9 KiB
Python
95 lines
2.9 KiB
Python
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#!/usr/bin/env python
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import os
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import subprocess
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import syslog
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import time
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from swsscommon.swsscommon import SonicV2Connector
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SYSLOG_IDENTIFIER = os.path.basename(__file__)
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SONIC_CFGGEN_PATH = '/usr/local/bin/sonic-cfggen'
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def log_info(msg):
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syslog.openlog(SYSLOG_IDENTIFIER)
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syslog.syslog(syslog.LOG_INFO, msg)
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syslog.closelog()
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def run_command(cmd, return_cmd=False):
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log_info("executing cmd = {}".format(cmd))
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proc = subprocess.Popen(cmd, shell=False, stdout=subprocess.PIPE)
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out, err = proc.communicate()
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if return_cmd:
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if err:
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return "Unknown"
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if len(out) > 0:
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return out.strip().decode('utf-8')
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def _get_device_type():
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"""
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Get device type
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"""
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device_type = run_command([SONIC_CFGGEN_PATH, '-m', '-v', 'DEVICE_METADATA.localhost.type'], return_cmd=True)
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return device_type
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def _is_storage_device():
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"""
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Check if the device is a storage device or not
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"""
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storage_device = run_command([SONIC_CFGGEN_PATH, '-d', '-v', 'DEVICE_METADATA.localhost.storage_device'], return_cmd=True)
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return storage_device == "true"
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def _is_acl_table_present():
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"""
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Check if acl table exists
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"""
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acl_table = run_command([SONIC_CFGGEN_PATH, '-d', '-v', 'ACL_TABLE.DATAACL'], return_cmd=True)
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return (acl_table != "Unknown" and bool(acl_table))
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def _is_switch_table_present():
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state_db = SonicV2Connector(host='127.0.0.1')
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state_db.connect(state_db.STATE_DB, False)
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table_present = False
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wait_time = 0
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TIMEOUT = 120
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STEP = 10
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while wait_time < TIMEOUT:
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if state_db.exists(state_db.STATE_DB, 'SWITCH_CAPABILITY|switch'):
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table_present = True
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break
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time.sleep(STEP)
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wait_time += STEP
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if not table_present:
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log_info("Switch table not present")
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return table_present
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def load_backend_acl(device_type):
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"""
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Load acl on backend storage device
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"""
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BACKEND_ACL_TEMPLATE_FILE = os.path.join('/', "usr", "share", "sonic", "templates", "backend_acl.j2")
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BACKEND_ACL_FILE = os.path.join('/', "etc", "sonic", "backend_acl.json")
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# this acl needs to be loaded only on a storage backend ToR. acl load will fail if the switch table isn't present
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if _is_storage_device() and _is_acl_table_present() and _is_switch_table_present():
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if os.path.isfile(BACKEND_ACL_TEMPLATE_FILE):
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run_command(['sudo', SONIC_CFGGEN_PATH, '-d', '-t', '{},{}'.format(BACKEND_ACL_TEMPLATE_FILE, BACKEND_ACL_FILE)])
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if os.path.isfile(BACKEND_ACL_FILE):
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run_command(['acl-loader', 'update', 'incremental', BACKEND_ACL_FILE])
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else:
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log_info("Skipping backend acl load - conditions not met")
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def main():
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device_type = _get_device_type()
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if device_type != "BackEndToRRouter":
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log_info("Skipping backend acl load on unsupported device type: {}".format(device_type))
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return
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load_backend_acl(device_type)
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if __name__ == "__main__":
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main()
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