# In a previous lesson we deployed a Ubuntu Cluster with default storage and found that the directories /home and /etc were persisted.
In this section, we are going to modify the persisted directories (defaultPersistDirs).
Open the file deploy/example_catalog/cr-app-ubuntu18.04.json.
Currently, defaultPersistDirs is set to:
Copy {
...
"defaultPersistDirs" : [ "/home" ] ,
...
}
Change it to:
Copy {
...
"defaultPersistDirs" : [ "/home" , "/var" ] ,
...
}
The full json should now look like this:
Copy {
"apiVersion" : "kubedirector.hpe.com/v1beta1" ,
"kind" : "KubeDirectorApp" ,
"metadata" : {
"name" : "ubuntu18x"
} ,
"spec" : {
"systemdRequired" : true ,
"defaultPersistDirs" : [ "/home" , "/var" ] ,
"config" : {
"roleServices" : [
{
"serviceIDs" : [
"ssh"
] ,
"roleID" : "vanilla_ubuntu"
}
] ,
"selectedRoles" : [
"vanilla_ubuntu"
]
} ,
"label" : {
"name" : "Ubuntu 18.04" ,
"description" : "Ubuntu 18.04 with no preinstalled apps"
} ,
"distroID" : "bluedata/ubuntu18x" ,
"version" : "1.1" ,
"configSchemaVersion" : 8 ,
"services" : [
{
"endpoint" : {
"port" : 22 ,
"isDashboard" : false
} ,
"id" : "ssh" ,
"label" : {
"name" : "SSH"
}
}
] ,
"defaultImageRepoTag" : "bluedata/ubuntu18.04:1.1" ,
"defaultConfigPackage" : null ,
"roles" : [
{
"cardinality" : "1+" ,
"id" : "vanilla_ubuntu"
}
]
}
}
We need to delete the old cr-app-ubuntu18.04.json application definition from our Kubernetes environment:
Copy $ kubectl delete -f deploy/example_catalog/cr-app-ubuntu18.04.json
kubedirectorapp.kubedirector.hpe.com "ubuntu18x" deleted
We can now deploy our updated application definition:
Copy $ kubectl create -f deploy/example_catalog/cr-app-ubuntu18.04.json
kubedirectorapp.kubedirector.hpe.com/ubuntu18x created
Next, deploy a cluster:
Copy $ kubectl create -f deploy/example_clusters/cr-cluster-ubuntu18.04-stor.yaml
kubedirectorcluster.kubedirector.hpe.com/ubuntu18.04-persistent created
We want to check that /vars is now persisted, let's find the PersistentVolume for our ubuntu virtual cluster:
Copy $ kubectl get pv
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
pvc-df7da24a-e609-4e32-b574-db579fbb0cda 40Gi RWO Delete Bound default/p-kdss-qtl4d-0 standard 20s
We can use describe pv to find the storage location:
Copy $ kubectl describe pv pvc-df7da24a-e609-4e32-b574-db579fbb0cda
.. .
Source:
Type: HostPath ( bare host directory volume )
Path: /tmp/hostpath-provisioner/p-kdss-qtl4d-0
HostPathType:
.. .
Finally, we can use ls to check what folders are persisted:
Copy $ ls /tmp/hostpath-provisioner/p-kdss-qtl4d-0
etc home var
/etc persisted?# KubeDirector will persist /etc if you don't have an app config package in your app definition./etc, /opt and /usr only if app config is defined.
See here for more info.
We will explore app config in this lesson .
# In this lesson we saw how defaultPersistDirs works.
You can find the:
KubeDirectorApp definition here KubeDirectorApp.spec definition here