=======
kubectl
=======

nodes
^^^^^

Nodes are the systems that run the kubernetes stuff.

**get nodes**

List the nodes and some basic information about them:

.. code-block:: console

   $ kubectl get nodes

   NAME     STATUS   ROLES                  AGE   VERSION
   node0    Ready    control-plane,master   90m   v1.23.3
   node1    Ready    <none>                 83m   v1.23.3
   node2    Ready    <none>                 69m   v1.23.3
   salusa   Ready    <none>                 78s   v1.23.3

**describe nodes**

Get more detailed information about a node.

.. code-block:: console

   $ kubectl describe node NODE_NAME


namespaces
^^^^^^^^^^

Used for separating the different applications. *wat?*

**get namespaces**

.. code-block:: console

   $ kubectl get namespaces
   NAME                   STATUS   AGE
   default                Active   100m
   kube-node-lease        Active   100m
   kube-public            Active   100m
   kube-system            Active   100m
   kubernetes-dashboard   Active   93m


**use namespace**

The `kubectl` `-n NAMESPACE` flag can be used to specify a namespace.

.. code-block:: console

   $ kubectl -n kubernetes-dashboard get pods

pods
^^^^

Applications get run in pods.

**get pods**

Get a list of the pods in a namespace.
The `default` namespace is used if not specified.

.. code-block:: console

   $ kubectl -n kubernetes-dashboard get pods
   NAME                                         READY   STATUS    RESTARTS   AGE
   dashboard-metrics-scraper-799d786dbf-7hqnk   1/1     Running   0          95m
   kubernetes-dashboard-6b6b86c4c5-dph98        1/1     Running   0          95m


**describe pod**

Get more information about a pod.

.. code-block:: console

   $ kubectl -n kubernetes-dashboard describe POD_NAME