From d58ba7b075bb4848349a2c920caaa08ff3773d70 Mon Sep 17 00:00:00 2001
From: Dmitry Shulyak <dshulyak@mirantis.com>
Date: Wed, 20 Jul 2016 17:05:19 +0300
Subject: [PATCH] Add example mounting ConfigMap as a single file into /etc dir

ref: https://github.com/kubernetes/kubernetes/pull/22575
---
 docs/user-guide/configmap/README.md           |  3 +++
 docs/user-guide/configmap/mount-file-pod.yaml | 21 +++++++++++++++++++
 2 files changed, 24 insertions(+)
 create mode 100644 docs/user-guide/configmap/mount-file-pod.yaml

diff --git a/docs/user-guide/configmap/README.md b/docs/user-guide/configmap/README.md
index e6bf6f52a5..2df57176dd 100644
--- a/docs/user-guide/configmap/README.md
+++ b/docs/user-guide/configmap/README.md
@@ -101,3 +101,6 @@ This pod runs a `cat` command to print the value of one of the keys in the volum
 $ kubectl logs config-volume-test-pod
 value-1
 ```
+
+Alternatively you can use [`mount-file-pod.yaml`](mount-file-pod.yaml) file to mount
+only a file from ConfigMap, preserving original content of /etc directory.
diff --git a/docs/user-guide/configmap/mount-file-pod.yaml b/docs/user-guide/configmap/mount-file-pod.yaml
new file mode 100644
index 0000000000..7efd9b4003
--- /dev/null
+++ b/docs/user-guide/configmap/mount-file-pod.yaml
@@ -0,0 +1,21 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: config-single-file-volume-pod
+spec:
+  containers:
+    - name: test-container
+      image: gcr.io/google_containers/busybox
+      command: [ "/bin/sh", "-c", "cat /etc/special-key" ]
+      volumeMounts:
+      - name: config-volume
+        mountPath: /etc/special-key
+        subPath: path/to/special-key
+  volumes:
+    - name: config-volume
+      configMap:
+        name: test-configmap
+        items:
+        - key: data-1
+          path: path/to/special-key
+  restartPolicy: Never