Kubernetes
drain_nodes
Drain nodes matching the given label or name, so that no pods are scheduled on them any longer and running pods are evicted
Activity as code
Below are the details and signature of the activity Python module.
| Type | action |
| Module | chaosk8s.node.actions |
| Name | delete_nodes |
| Return | None |
Usage
JSON
{
"name": "delete-nodes",
"type": "action",
"provider": {
"type": "python",
"module": "chaosk8s.node.actions",
"func": "delete_nodes"
}
}YAML
name: delete-nodes
provider:
func: delete_nodes
module: chaosk8s.node.actions
type: python
type: actionArguments
| Name | Type | Default | Required | Title | Description |
|---|---|---|---|---|---|
| label_selector | string | null | Yes | Label Selector | Selectors to target the appropriate nodes |
| all | boolean | false | No | All Nodes | Delete all nodes matching the selector |
| rand | boolean | false | No | Random Selection | Delete only a random selection matching the selector |
| count | integer | null | No | Deletion Amount | Amount of nodes to delete |
| grace_period_seconds | integer | null | No | Grace Period | Grace period for node termination |
| pod_label_selector | string | null | No | Per Pod Selection | Select nodes running the matching pods selection |
| pod_namespace | string | null | No | Pod Namespace | Pods selection namespace |
Select the appropriate nodes by label.
Nodes are not drained beforehand so we can see how the cluster behaves. Nodes cannot be restarted, they are deleted. Please be careful when using this action.
On certain cloud providers, you also need to delete the underneath VM instance as well afterward. This is the case with GCE for instance.
- If
allis set toTrue, all nodes will be terminated. - If
randis set toTrue, one random node will be terminated. - If ̀
countis set to a positive number, only a uptocountnodes (randomly picked) will be terminated. Otherwise, the first retrieved node will be terminated.
Signature
def delete_nodes(label_selector: str = None,
all: bool = False,
rand: bool = False,
count: int = None,
grace_period_seconds: int = None,
secrets: Dict[str, Dict[str, str]] = None,
pod_label_selector: str = None,
pod_namespace: str = None):
pass