Add the kubernetes role.

ansible/roles/kubernetes/files/kshell

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+#
+set -euo pipefail
+IFS=$'\n\t'
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+: ${cpu:="500m"}
+: ${memory:="2Gi"}
+
+overrides=""
+if [ ! -z "${highmem:-}" ]; then
+    overrides=$(jq --compact-output '.' <<EOF
+{
+  "spec": {
+    "tolerations": [
+      {
+        "key": "dedicated",
+        "operator": "Equal",
+        "value": "background-highmem",
+        "effect": "NoSchedule"
+      }
+    ],
+    "nodeSelector": {"dedicated": "background-highmem"}
+  }
+}
+EOF
+)
+fi
+
+exec kubectl run --rm -i -t --image alpine:3.13 --overrides="$overrides" --requests "cpu=$cpu,memory=$memory" --limits "cpu=$cpu,memory=$memory" --pod-running-timeout 10m "tom-$(uuidgen | cut -d '-' -f 1)" -- /bin/sh "$@"