Labels support

[aravindavk]

Region

This label is set for nodes. While creating the Storage pool, don't allow the creation if the export directories are from different regions.

Support setting this label while adding a node or as a separate command.

kadalu node add server1.example.com --region blr1
kadalu node region blr1

General label support:

Add label to any resource. Some of the labels are inherited or automatic(Ex: region label of Storage pool and volume is inherited from the nodes, pool type as label, FS type as label to the Storage unit).

kadalu label add <resource> <identifier> <label1>,<label2> ..
kadalu label add node server1.example.com os=arm64,lowRAM
kadalu label add pool pool1 fast,ssd
kadalu label add volume vol1 app1
kadalu label add storage-unit server1:/exports/s1 ssd

List all the labels of an resource

kadalu label list <resource> <identifier>
kadalu label list pool pool1

Remove labels

kadalu label remove <resource> <identifier> <label1>,<label2>..
kadalu label remove pool pool1 fast

Reset all the labels (Remove all labels)

kadalu label reset <resource> <identifier>
kadalu label reset pool pool1

These labels will be used in various places like:

• Storage pool create validations
• Automatic provisioning the volumes. Ex: kadalu volume create vol1 -s 10G --filter fast,mirror3 automatically selects the Storage pool that satisfies the filters and creates a volume out of it.