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John Mulhausen
2016-03-07 12:09:02 +00:00
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docs/user-guide/configmap/README.md
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# ConfigMap example
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This example assumes you have a Kubernetes cluster installed and running, and that you have
installed the `kubectl` command line tool somewhere in your path. Please see the [getting
started](../../../docs/getting-started-guides/) for installation instructions for your platform.
started](http://kubernetes.io/docs/getting-started-guides/) for installation instructions for your platform.
## Step One: Create the ConfigMap
A ConfigMap contains a set of named strings.
Use the [`examples/configmap/configmap.yaml`](configmap.yaml) file to create a ConfigMap:
Use the [`configmap.yaml`](configmap.yaml) file to create a ConfigMap:
```console
```shell
$ kubectl create -f docs/user-guide/configmap/configmap.yaml
```
You can use `kubectl` to see information about the ConfigMap:
```console
```shell
$ kubectl get configmap
NAME DATA
test-secret 2
@@ -43,7 +38,7 @@ data-2: 7 bytes
View the values of the keys with `kubectl get`:
```console
```shell
$ cluster/kubectl.sh get configmaps test-configmap -o yaml
apiVersion: v1
data:
@@ -61,16 +56,16 @@ metadata:
## Step Two: Create a pod that consumes a configMap in environment variables
Use the [`examples/configmap/env-pod.yaml`](env-pod.yaml) file to create a Pod that consumes the
Use the [`env-pod.yaml`](env-pod.yaml) file to create a Pod that consumes the
ConfigMap in environment variables.
```console
```shell
$ kubectl create -f docs/user-guide/configmap/env-pod.yaml
```
This pod runs the `env` command to display the environment of the container:
```console
```shell
$ kubectl logs secret-test-pod
KUBE_CONFIG_1=value-1
KUBE_CONFIG_2=value-2
@@ -78,40 +73,29 @@ KUBE_CONFIG_2=value-2
## Step Three: Create a pod that sets the command line using ConfigMap
Use the [`examples/configmap/command-pod.yaml`](env-pod.yaml) file to create a Pod with a container
Use the [`command-pod.yaml`](env-pod.yaml) file to create a Pod with a container
whose command is injected with the keys of a ConfigMap
```console
```shell
$ kubectl create -f docs/user-guide/configmap/env-pod.yaml
```
This pod runs an `echo` command to display the keys:
```console
```shell
value-1 value-2
```
## Step Four: Create a pod that consumes a configMap in a volume
Pods can also consume ConfigMaps in volumes. Use the [`examples/configmap/volume-pod.yaml`](volume-pod.yaml) file to create a Pod that consume the ConfigMap in a volume.
Pods can also consume ConfigMaps in volumes. Use the [`volume-pod.yaml`](volume-pod.yaml) file to create a Pod that consume the ConfigMap in a volume.
```console
```shell
$ kubectl create -f docs/user-guide/configmap/volume-pod.yaml
```
This pod runs a `cat` command to print the value of one of the keys in the volume:
```console
```shell
value-1
```
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```