CML2 Plugin: Enhanced pyATS integration with CML2 (Cisco Modeling Labs)#110
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CML2 Plugin: Enhanced pyATS integration with CML2 (Cisco Modeling Labs)#110
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- Add new plugin: cml2_plugin - Creates CML2 lab topology from pyATS testbed definition - Starts lab and waits for convergence - Merges original testbed with CML2-generated testbed (preserves alias, credentials, etc.) - Cleans up lab after job completion (optional --cml2-keep-lab) - Add virl2_client to install_requires
- Always infer platform for credential lookup (existing platform may be generic) - Set credentials on both device and connection objects - Update nxosv9000 default password to 'cisco' - Add link verification after lab convergence - Add topology summary table display before pre_job completion - Fix node.state() callable check in topology summary
tahigash
changed the title
tahigash
changed the title
- Add configure_nodes() method to apply hostname and basic config to CML2 nodes - Add --cml2-init-config CLI argument (enabled by default) - Store device alias in DeviceInfo dataclass - Use device name for hostname to match Unicon's hostname validation - Update README with new option documentation
- Add _transform_logical_testbed() to handle logical testbed configs - Remove unsupported OS types (pagent, traffic generators) from testbed - Strip dyntopo-specific keys from device configs - Rename interface aliases to actual_name values in topology - Handle skip-bringup mode for testbed.actual.yaml creation - Fix IP address serialization in _testbed_to_dict()
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Description
This PR provides a comprehensive CML2 (Cisco Modeling Labs 2) plugin for pyATS that enables automatic lab creation, management, and device connectivity from pyATS testbed definitions.
Features
Core Functionality
CLI Arguments
--cml2-enable--cml2-url--cml2-username--cml2-password--cml2-keep-labPlatform Support
Automatic platform inference and node definition mapping for:
Default Credentials
Automatic application of CML2 default credentials based on node definition:
genie.testbed.load()Link Verification
RuntimeErrorif expected links are missingTopology Summary Display
Displays comprehensive lab topology information before
pre_jobcompletion:Implementation Details
Key Methods
CML2LabBuilder.build()- Creates CML2 lab from testbedCML2LabBuilder.verify_links()- Validates lab link topologyCML2Plugin.pre_job()- Handles lab creation and startupCML2Plugin.post_job()- Handles lab cleanupCML2Plugin._update_testbed_in_place()- Updates testbed with CML2 infoCML2Plugin._display_topology_summary()- Shows topology summaryHelper Functions
infer_platform()- Infers CML2 platform from device attributesget_node_definition()- Maps platform to CML2 node definitionFiles Changed
src/pyats/contrib/plugins/cml2_plugin/cml2.pyTesting
Usage Example
pyats run job my_job.py \ --testbed-file testbed.yaml \ --cml2-enable \ --cml2-url https://cml2-server/ \ --cml2-username admin \ --cml2-password 'password' \ --cml2-keep-lab