instruction: Create a Kubernetes Pod configuration with best practices
output: ```dockerfile
  from the host); if something already exists at
  that path and isn't a regular file, the Pod fails.
  Here's the example manifest:
  apiVersion: v1
  kind: Pod
  metadata:
   name: test-webserver
  spec:
   os: { name: linux }
   nodeSelector:
   kubernetes.io/os: linux
   containers:
   - name: test-webserver
   image: registry.k8s.io/test-webserver:latest
   volumeMounts:
   - mountPath: /var/local/aaa
   name: mydir
   - mountPath: /var/local/aaa/1.txt
   name: myfile
   volumes:
   - name: mydir
   hostPath:
   # Ensure the file directory is created.
   path: /var/local/aaa
   type: DirectoryOrCreate
   - name: myfile
   hostPath:
   path: /var/local/aaa/1.txt
   type: FileOrCreate
  iscsi
  An iscsi volume allows an existing iSCSI (SCSI over IP) volume to be mounted
  into your Pod. Unlike emptyDir, which is erased when a Pod is removed, the
  contents of an iscsi volume are preserved and the volume is merely
  unmounted. This means that an iscsi volume can be pre-populated with data, and
  that data can be shared between pods.
  Note:You must have your own iSCSI server running with the volume created before you can use it.
  A feature of iSCSI is that it can be mounted as read-only by multiple consumers
  simultaneously. This means that you can pre-populate a volume with your dataset
  and then serve it in parallel
  ```