topic Re: Multiple credentials in PyATS yaml file not working in Tools

Multiple credentials in PyATS yaml file not working

assadniang — Thu, 21 Aug 2025 13:17:43 GMT

Hello,

I have the following configuration

I have read somewhere (google AI), that you can have multiple credentials in your yaml file

But PyATS always uses the default credentials, even when I specify the 'ro_credentials' to use

    u350-s2-17-vcsr:
        type: router
        os: iosxe
        platform: c8kv
        #alias: 'uut'
        credentials:
            default:
                username: ******
                password: ******
            ro_credentials:
                username: cisco_ro
                password: ******
            
        connections:
            cli:
                protocol: ssh
                ip: FD:192:168:53:0:9:17:4
                ssh_options: -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null

    try:
        LOGGER.info(f">>> Connecting to {device_name}...1")
        device.connect(log_stdout=False, init_config_commands=[], credentials='ro_credentials')
        LOGGER.info(f"Successfully connected to {device_name}\n")
        return device
    
    except (TimeoutError, StateMachineError, ConnectionError) as e:
        LOGGER.error(f"Failed to connect to {device_name}: {e}\n")
        return None

Sometimes, I also get the error message:

TypeError: function() got multiple values for keyword argument 'credentials'

Re: Multiple credentials in PyATS yaml file not working

bigevilbeard — Thu, 21 Aug 2025 13:32:45 GMT

@assadniang looking at the error you see/posted here, looks like how pyats deals with the creds parameter in the connect() method. Try using the via parameter instead of credentials. This i think is the simple fix, try this and see how this works, if this does not work If the issue might be in the YAML structure or how the testbed is being loaded.

try: LOGGER.info(f">>> Connecting to {device_name}...1") device.connect(log_stdout=False, init_config_commands=[], via='ro_credentials') LOGGER.info(f"Successfully connected to {device_name}\n") return device except (TimeoutError, StateMachineError, ConnectionError) as e: LOGGER.error(f"Failed to connect to {device_name}: {e}\n") return None

Re: Multiple credentials in PyATS yaml file not working

assadniang — Thu, 21 Aug 2025 14:21:36 GMT

@bigevilbeard
I am getting this error message:

ValueError: via='ro_credentials' does not exist for device 'u350-s2-17-vcsr'

BTW, I can connect with the default credential without any issues

Re: Multiple credentials in PyATS yaml file not working

bigevilbeard — Thu, 21 Aug 2025 14:26:45 GMT

@assadniang under the connection in yaml file add

credentials: ro_credentials

Then the python stuff from before. I think this happnes due to the expectation of cli, console..

Re: Multiple credentials in PyATS yaml file not working

assadniang — Thu, 21 Aug 2025 14:34:07 GMT

u350-s2-17-vcsr: type: router os: iosxe platform: c8kv #alias: 'uut' credentials: default: username: ****** password: ****** ro_credentials: username: cisco_ro password: ***** connections: credentials: ro_credentials cli: protocol: ssh ip: FD:192:168:53:0:9:17:4 ssh_options: -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null

This is the error message

pyats.utils.exceptions.SchemaTypeError: devices.u350-s2-17-vcsr.connections.credentials:

Re: Multiple credentials in PyATS yaml file not working

bigevilbeard — Thu, 21 Aug 2025 14:40:04 GMT

Sorry this is my bad. ro_credentials at the wrong indentation level, try

u350-s2-17-vcsr: type: router os: iosxe platform: c8kv #alias: 'uut' credentials: default: username: ****** password: ****** ro_credentials: username: cisco_ro password: ***** connections: cli: protocol: ssh ip: FD:192:168:53:0:9:17:4 ssh_options: -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null credentials: ro_credentials

Your credentials parameter should be specified within the individual connection definition (cli in this case)

Re: Multiple credentials in PyATS yaml file not working

assadniang — Thu, 21 Aug 2025 14:59:41 GMT

Still not working...

u350-s2-17-vcsr: type: router os: iosxe platform: c8kv #alias: 'uut' credentials: default: username: ***** password: ***** ro_credentials: username: cisco_ro password: ******** connections: cli: protocol: ssh ip: FD:192:168:53:0:9:17:4 ssh_options: -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null credentials: ro_credentials

pyats.utils.exceptions.SchemaTypeError: devices.u350-s2-17-vcsr.connections.cli.credentials:

Re: Multiple credentials in PyATS yaml file not working

bigevilbeard — Thu, 21 Aug 2025 16:17:35 GMT

Hmmmm ... out on a limb here now .. so try

u350-s2-17-vcsr: type: router os: iosxe platform: c8kv credentials: default: username: ***** password: ***** ro_credentials: username: cisco_ro password: ******** connections: cli: protocol: ssh ip: FD:192:168:53:0:9:17:4 ssh_options: -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null ro_cli: protocol: ssh ip: FD:192:168:53:0:9:17:4 ssh_options: -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null via: ro_credentials

In python use

device.connect(alias='ro_cli', log_stdout=False, init_config_commands=[])