[fast-reboot-filter-routes.py] Remove click and improve error reporting

[stepanblyschak]

1. Removed click usage from a script since there is no active click context therefore we saw these error messages:

ERR fast-reboot-filter-routes: Got an exception There is no active click context.: Traceback: Traceback (most recent call last):#012  File "/usr/local/bin/fast-reboot-filter-routes.py", line 18, in get_connected_routes#012    output, ret = clicommon.run_command(cmd, return_cmd=True)#012  File "/usr/local/lib/python3.9/dist-packages/utilities_common/cli.py", line 545, in run_command#012    proc = subprocess.Popen(command, shell=shell, text=True, stdout=subprocess.PIPE)#012  File "/usr/lib/python3.9/subprocess.py", line 951, in __init__#012    self._execute_child(args, executable, preexec_fn, close_fds,#012  File "/usr/lib/python3.9/subprocess.py", line 1823, in _execute_child#012    raise child_exception_type(errno_num, err_msg, err_filename)#012FileNotFoundError: [Errno 2] No such file or directory: 'sudo vtysh -c "show ip route connected json"'#012#012During handling of the above exception, another exception occurred:#012#012Traceback (most recent call last):#012  File "/usr/local/lib/python3.9/dist-packages/click/globals.py", line 23, in get_current_context#012    return getattr(_local, 'stack')[-1]#012AttributeError: '_thread._local' object has no attribute 'stack'#012#012During handling of the above exception, another exception occurred:#012#012Traceback (most recent call last):#012  File "/usr/local/bin/fast-reboot-filter-routes.py", line 79, in <module>#012    res = main()#012  File "/usr/local/bin/fast-reboot-filter-routes.py", line 70, in main#012    connected_routes = get_connected_routes()#012  File "/usr/local/bin/fast-reboot-filter-routes.py", line 27, in get_connected_routes#012    ctx = click.get_current_context()#012  File "/usr/local/lib/python3.9/dist-packages/click/globals.py", line 26, in get_current_context#012    raise RuntimeError('There is no active click context.')#012RuntimeError: There is no active click context.

2. Improved error reporting so that when an error occurs when we run a command it will report it via terminal and syslog:

stdout:

Failed to execute sudo vtysh -c show ip route connected jsson: % Unknown command: show ip route connected jsson

syslog:

Oct 17 11:53:10.620788 arc-switch1025 ERR fast-reboot-filter-routes: Got an exception: Failed to execute sudo vtysh -c show ip route connected jsson: % Unknown command: show ip route connected jsson: Traceback: Traceback (most recent call last):#012  File "/home/admin/fast-reboot-filter-routes.py", line 73, in <module>#012    res = main()#012  File "/home/admin/fast-reboot-filter-routes.py", line 64, in main#012    connected_routes = get_connected_routes()#012  File "/home/admin/fast-reboot-filter-routes.py", line 18, in get_connected_routes#012    raise Exception("Failed to execute {}: {}".format(" ".join(cmd), output.rstrip('\n')))#012Exception: Failed to execute sudo vtysh -c show ip route connected jsson: % Unknown command: show ip route connected jsson

What I did

How I did it

How to verify it

Previous command output (if the output of a command-line utility has changed)

New command output (if the output of a command-line utility has changed)