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$ kubectl-iam -iam-url https://iam.quantumtea.it -group QST
please open the link in your web browser: https://iam.quantumtea.it/device?user_code=BB3FXJ

or scan the QR code

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kubectl configured correctly

How to Create and Manage Kubernetes Cluster Nodes

Prerequisites

Before you can create and manage nodes in your Kubernetes cluster, make sure you have completed the following prerequisites:

1. Configure kubectl with the kubectl-openstack plugin: Ensure that your kubectl is correctly configured with the kubectl-* plugin.

2. Verify the existence of the 'K8S' security group in the CloudVeneto project with the following rules, or create it:

Creating a New Node

To create a new node in your Kubernetes cluster, you'll use kubectl, the standard Kubernetes command-line interface. Specifically, you will utilize the kubectl apply command, which takes a YAML file as input.

The YAML file required to create a new node should follow this structure:

---
apiVersion: osnode.infn.it/v1
kind: OpenStackNode
metadata:
  name: NODE_NAME
spec:
  flavor: FLAVOR_NAME
  keyPair: KEYPAIR_NAME
  policy: [shared | private ]

• NODE_NAME: <Unique node name>
• FLAVOR_NAME: <CloudVeneto flavor name>
• KEYPAIR_NAME: <User-defined SSH keypair name>
• shared | private: <Choose one: shared or private>

In the following example, we request the creation of two nodes (osn-01 and osn-02), the first being shared and the second private, with different flavors (cloudveneto.medium and cloudveneto.large).
Both nodes use the same SSH keypair (my-key):

---
apiVersion: osnode.infn.it/v1
kind: OpenStackNode
metadata:
  name: osn-01
spec:
  flavor: cloudveneto.medium
  keyPair: my-key
  policy: shared

---
apiVersion: osnode.infn.it/v1
kind: OpenStackNode
metadata:
  name: osn-02
spec:
  flavor: cloudveneto.large
  keyPair: my-key
  policy: private

$ kubectl apply -f osnode.yml
openstacknode.osnode.infn.it/osn-01 created
openstacknode.osnode.infn.it/osn-02 created

Verifying Node Status

To check the status of one or more nodes in your Kubernetes cluster, you can use the following commands:

• To list all nodes and their basic information:

  Code Block
  language bash theme Midnight
  $ kubectl get osn NAME PHASE OWNER POLICY PROVIDER VM IPV4 AGE osn-01 Running zangrand-at-infn.it private CloudVeneto 10.64.53.40 169m osn-02 Running zangrand-at-infn.it shared CloudVeneto 10.64.53.67 169m

  
  

• To list all nodes with additional details, including flavor, status, and IP address:

  Code Block
  language bash theme Midnight
  $ kubectl get osn -o wide NAME PHASE OWNER POLICY PROVIDER VM FLAVOR VM STATUS VM IPV4 AGE osn-01 Running zangrand-at-infn.it private CloudVeneto cloudveneto.medium ACTIVE 10.64.53.40 169m osn-02 Running zangrand-at-infn.it shared CloudVeneto cloudveneto.medium ACTIVE 10.64.53.67 169m

  
  

• To view detailed information about a specific node (replace osn-01 with the desired node name):

  Code Block
  language bash theme Midnight
  $ kubectl get osn -o wide osn-01 NAME PHASE OWNER POLICY PROVIDER VM FLAVOR VM STATUS VM IPV4 AGE osn-01 Running zangrand-at-infn.it private CloudVeneto cloudveneto.medium ACTIVE 10.64.53.40 169m

  
  

Removing Nodes

To remove one or more nodes and their associated VMs from CloudVeneto, use the following command:

$ kubectl delete osn <node_name_1> <node_name_2> ...

For example, to remove osn-01 and osn-02, you would run:

$ kubectl delete osn osn-01 osn-02
openstacknode.osnode.infn.it "osn-01" deleted
openstacknode.osnode.infn.it "osn-02" deleted

...