Deleting Ondat Objects

When a Kubernetes object is deleted, Ondat controllers automatically sync this deletion to Ondat. For example, when a Kubernets node is deleted, this will automatically be mirrored in Ondat, likewise with Namespaces.

Here is an Ondat node, running on Kubernetes node worker1. An Ondat node is any machine that is running the Ondat daemonset pod. The node is visible below in kubectl.

$ kubectl describe -n storageos pod storageos-daemonset-6q4g8
Name:                 storageos-daemonset-6q4g8
Namespace:            storageos
Priority:             2000001000
Priority Class Name:  system-node-critical
Node:                 worker1/192.168.152.238
Start Time:           Thu, 06 May 2021 15:53:34 +0100
Labels:               app=storageos
                      app.kubernetes.io/component=storageos-daemonset
                      app.kubernetes.io/instance=example-ondat
                      app.kubernetes.io/managed-by=storageos-operator
                      app.kubernetes.io/name=storageos
                      app.kubernetes.io/part-of=storageos
                      controller-revision-hash=f5dcf577d
                      kind=daemonset
                      pod-template-generation=1
                      storageos_cr=example-ondat
Annotations:          kubectl.kubernetes.io/default-logs-container: storageos
Status:               Running
IP:                   192.168.152.238
...

The nodes in your cluster can be seen with storageos get nodes.

$ storageos get nodes
NAME          HEALTH  AGE        LABELS                              
worker1       online  1 day ago  beta.kubernetes.io/arch=amd64,      
                                 beta.kubernetes.io/os=linux,        
                                 cattle.io/creator=norman,           
                                 kubernetes.io/arch=amd64,           
                                 kubernetes.io/hostname=worker1,
                                 kubernetes.io/os=linux,             
                                 node-role.kubernetes.io/worker=true
                                 storageos.com/computeonly=true 
worker2       online  1 day ago  beta.kubernetes.io/arch=amd64,      
                                 beta.kubernetes.io/os=linux,        
                                 cattle.io/creator=norman,           
                                 kubernetes.io/arch=amd64,           
                                 kubernetes.io/hostname=worker2,
                                 kubernetes.io/os=linux,             
                                 node-role.kubernetes.io/worker=true 
worker3       online  1 day ago  beta.kubernetes.io/arch=amd64,      
                                 beta.kubernetes.io/os=linux,        
                                 cattle.io/creator=norman,           
                                 kubernetes.io/arch=amd64,           
                                 kubernetes.io/hostname=worker3,
                                 kubernetes.io/os=linux,             
                                 node-role.kubernetes.io/worker=true
...

Delete the node.
```
kubectl delete node worker1
```

Verify that the node has been deleted with kubectl get nodes or storageos get nodes. The node has now disappeared from Ondat.

$ storageos get nodes
NAME          HEALTH  AGE        LABELS                              
worker2       online  1 day ago  beta.kubernetes.io/arch=amd64,      
                                 beta.kubernetes.io/os=linux,        
                                 cattle.io/creator=norman,           
                                 kubernetes.io/arch=amd64,           
                                 kubernetes.io/hostname=worker2,
                                 kubernetes.io/os=linux,             
                                 node-role.kubernetes.io/worker=true 
worker3       online  1 day ago  beta.kubernetes.io/arch=amd64,      
                                 beta.kubernetes.io/os=linux,        
                                 cattle.io/creator=norman,           
                                 kubernetes.io/arch=amd64,           
                                 kubernetes.io/hostname=worker3,
                                 kubernetes.io/os=linux,             
                                 node-role.kubernetes.io/worker=true 
...