Write new Task: Pulling an Image from a Private Registry

_data/tasks.yml

@@ -10,6 +10,7 @@ toc:
   - docs/tasks/configure-pod-container/assign-cpu-ram-container.md
   - docs/tasks/configure-pod-container/configure-volume-storage.md
   - docs/tasks/configure-pod-container/distribute-credentials-secure.md
+  - docs/tasks/configure-pod-container/pull-image-private-registry.md
 
 - title: Accessing Applications in a Cluster
   section:

docs/tasks/configure-pod-container/private-reg-pod.yaml

@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: private-reg
+spec:
+  containers:
+    - name: private-reg-container
+      image: <your-private-image>
+  imagePullSecrets:
+    - name: regsecret
+

docs/tasks/configure-pod-container/pull-image-private-registry.md

@@ -0,0 +1,133 @@
+---
+title: Pulling an Image from a Private Registry
+---
+
+{% capture overview %}
+
+This page shows how to create a Pod that uses a Secret to pull an image from a
+private Docker registry or repository.
+
+{% endcapture %}
+
+{% capture prerequisites %}
+
+* {% include task-tutorial-prereqs.md %}
+
+* To do this exercise, you need a
+[Docker ID](https://docs.docker.com/docker-id/) and password.
+
+{% endcapture %}
+
+{% capture steps %}
+
+### Logging in to Docker
+
+    docker login
+
+When prompted, enter your Docker username and password.
+
+The login process creates or updates a `config.json` file that holds an
+authorization token.
+
+View the `configfile.json` file:
+
+    cat ~/.docker/config.json
+
+The output contains a section similar to this:
+
+    {
+        "auths": {
+            "https://index.docker.io/v1/": {
+                "auth": "c3RldmU1MzpTdGV2ZURvY2tAIzE2"
+            }
+        }
+    }
+
+### Creating a Secret that holds your authorization token
+
+Create a Secret named `regsecret`:
+
+    kubectl create secret docker-registry regsecret --docker-username=<your-name> --docker-password=<your-pword> --docker-email=<your-email>
+
+where:
+
+* `<your-name>` is your Docker username.
+* `<your-pword>` is your Docker password.
+* `<your-email>` is your Docker email.
+
+### Understanding your Secret
+
+To understand what's in the Secret you just created, start by viewing the
+Secret in YAML format:
+
+    kubectl get secret regsecret --output=yaml
+
+The output is similar to this:
+
+    apiVersion: v1
+    data:
+      .dockercfg: eyJodHRwczovL2luZGV4L ... J0QUl6RTIifX0=
+    kind: Secret
+    metadata:
+      ...
+      name: regsecret
+      ...
+    type: kubernetes.io/dockercfg
+
+The value of the `.dockercfg` field is a base64 representation of your secret data.
+
+Copy the base64 representation of the secret data into a file named `secret64`.
+
+**Important**: Make sure there are no line breaks in your `secret64` file.
+
+To understand what is in the `dockercfg` field, convert the secret data to a
+readable format:
+
+    base64 -d secret64
+
+The output is similar to this:
+
+    {"https://index.docker.io/v1/":{"username":"janedoe","password":"xxxxxxxxxxx","email":"jdoe@example.com","auth":"c3RldmU1MzpTdGV2ZURvY2tAIzE2"}}
+
+Notice that the secret data contains the authorization token from your
+`config.json` file.
+
+### Creating a Pod that uses your Secret
+
+Here is a configuration file for a Pod that needs access to your secret data:
+
+{% include code.html language="yaml" file="private-reg-pod.yaml" ghlink="/docs/tasks/configure-pod-container/private-reg-pod.yaml" %}
+
+Copy the contents of `private-reg-pod.yaml` to your own file named
+`my-private-reg-pod.yaml`. In your file, replace `<your-private-image>` with
+the path to an image in a private repository.
+
+Example Docker Hub private image:
+
+    janedoe/jdoe-private:v1
+
+To pull the image from the private repository, Kubernetes needs credentials. The
+ `imagePullSecrets` field in the configuration file specifies that Kubernetes
+ should get the credentials from a Secret named
+`regsecret`.
+
+Create a Pod that uses your Secret, and verify that the Pod is running:
+
+    kubectl create -f my-private-reg-pod.yaml
+    kubectl get pod private-reg
+
+{% endcapture %}
+
+{% capture whatsnext %}
+
+* Learn more about [Secrets](/docs/user-guide/secrets/).
+* Learn more about
+[using a private registry](/docs/user-guide/images/#using-a-private-registry).
+* See [kubectl create secret docker-registry](/docs/user-guide/kubectl/kubectl_create_secret_docker-registry/).
+* See [Secret](/docs/api-reference/v1/definitions/#_v1_secret)
+* See the `imagePullSecrets` field of
+[PodSpec](/docs/api-reference/v1/definitions/#_v1_podspec).
+
+{% endcapture %}
+
+{% include templates/task.md %}