kubectl-attach: add page (#18596)

pages/common/kubectl-attach.md

@@ -0,0 +1,24 @@
+# kubectl attach
+
+> Attach to a process that is already running inside an existing container.
+> More information: <https://kubernetes.io/docs/reference/kubectl/generated/kubectl_attach/>.
+
+- Get output from a pod:
+
+`kubectl attach {{pod_name}}`
+
+- Get output from a container in the specified pod:
+
+`kubectl attach {{pod_name}} {{[-c|--container]}} {{container_name}}`
+
+- Get output from the first pod of a replica set:
+
+`kubectl attach {{[rs|replicaset]}}/{{replicaset_name}}`
+
+- Create an interactive session with a pod:
+
+`kubectl attach {{pod_name}} {{[-it|--stdin --tty]}}`
+
+- Create an interactive session with a specific container from a pod:
+
+`kubectl attach {{pod_name}} {{[-c|--container]}} {{container_name}} {{[-it|--stdin --tty]}}`