Starting, Stopping, and Wiping Nodes¶
When starting a lab simulation, CML starts a virtual machine (VM) for each node in the lab. Similarly, stopping a lab or wiping a lab affects all of the nodes in the lab. If you want to start, stop, or wipe individual nodes, you can do that in the Workbench. If you are running a simulation, you can start, stop, or wipe individual nodes in that simulation without stopping the entire lab or interrupting the other nodes in the simulation.
Procedure
In the Workbench, select the node.
Click the Simulate tab in the lower pane of the Workbench.
Click the Start, Stop, or Wipe Node button in the Simulate pane.
Caution
Pay attention to the button labels. If you have not selected a single node, then the buttons in the Simulate pane will indicate Start Lab, Stop Lab, or Wipe Lab. Clicking on these buttons will apply the action to all nodes in the lab.
- Start
Starts a VM associated with the node.
Starting a node allocates a VM for the node if one does not already exist. If the node has been started before, it reuses the already-allocated resources, such as disk images and MAC addresses.
- Stop
Stops the VM associated with the node.
Stopping a node releases its memory and CPU resources. A stopped node is still present on the CML server and retains its disks and other properties for use when it is started again.
- Wipe Node
Deletes all state associated with the node.
Wiping a node removes all state and properties associated with the node from the CML server. The next time you start the node, CML will re-create it and assign new MAC addresses, disks, and other resources. Since a wiped node has no pre-existing state, the node will load its bootstrap configuration the first time it is restarted. The node’s bootstrap configuration can be found in the Edit Config pane of the Workbench.
The Workbench’s Simulate pane with Start, Stop Lab, and Wipe actions¶
Depending on the node’s status, one or more of the buttons in the node’s Simulate pane may be disabled. The Start and Wipe Node buttons are only enabled when the node is already stopped. The Stop button is only enabled if the node has been started.
Related Topics