cordon
Description
Cordoning drives makes them unschedulable. DirectPV does not schedule volumes on drives that have been cordoned.
Use kubectl directpv uncordon to make cordoned drives accessible for scheduling again.
Syntax
kubectl directpv cordon [DRIVE ...] [flags]
Parameters
kubectl directpv cordon requires a way to define the drive(s) to cordon.
The command does not require any specific parameter.
All parameters are optional, as long as you include a way to select one or more drives in the command.
Flags
| Flag | Description |
|---|---|
--all |
Select all drives. |
-d, --drives <string> |
Select drives by given names. Optionally, supports ellipsis expansion pattern, such as sd{a...z}. |
--dry-run |
Run a trial of the command without making changes to the drive(s). |
-n, --nodes <string> |
Select drives from the specified notes nodes. Optionally, supports ellipsis expansion pattern, such as node{1...10}. |
--status <string> |
Select drives by drive status. Valid statuses include: error, lost, moving, ready, or removed. |
Global Flags
You can use the following global DirectPV flags with kubectl directpv cordon:
| Flag | Description |
|---|---|
--kubeconfig <string> |
Path to the kube.config file to use for CLI requests |
--quiet |
Suppress printing error messages |
Examples
Cordon all drives from all nodes
The following command cordons all drives from all nodes.
kubectl directpv cordon --all
Cordon all drives from a node
The following command cordons all drives from the specified node(s). This command uses a flag that supports ellipsis expansion notation pattern.
kubectl directpv cordon --nodes=node1
Cordon a drive from all nodes by name
The following command cordons a the drive named nvme1n1 drive from all nodes.
kubectl directpv cordon --drives=nvme1n1
Cordon specific drives from specific nodes with expansion notation
The following command cordons drives sda, sdb, sdc, sdd, sde, and sdf from nodes node1, node2, node3, and node4.
kubectl directpv cordon --nodes=node{1...4} --drives=sd{a...f}
Cordon drives which are in ’error’ status
The following command cordons all drives with the status of error.
kubectl directpv cordon --status=error