Change:
<ins> --- assignees: - eparis - pmorie title: Configuring Redis using a ConfigMap --- {% capture overview %} This page provides a real world example of how to configure Redis using a ConfigMap and builds upon the [Using ConfigMap Data in Pods](/docs/tasks/configure-pod-container/configure-pod-configmap/) and [Configure Containers Using a ConfigMap](/docs/tasks/configure-pod-container/configmap/) tasks. {% endcapture %} {% capture objectives %} * Create a ConfigMap. * Create a pod specification using the ConfigMap. * Create the pod. * Verify that the configuration was correctly applied. {% endcapture %} {% capture prerequisites %} * {% include task-tutorial-prereqs.md %} * Understand [Using ConfigMap Data in Pods](/docs/tasks/configure-pod-container/configure-pod-configmap/). * Understand [Configure Containers Using a ConfigMap](/docs/tasks/configure-pod-container/configmap/). {% endcapture %} {% capture lessoncontent %} ## Real World Example: Configuring Redis using a ConfigMap You can follow the steps below to configure a Redis cache using data stored in a ConfigMap. 1. Create a ConfigMap from the `docs/user-guide/configmap/redis/redis-config` file: ```shell kubectl create configmap example-redis-config --from-file=docs/user-guide/configmap/redis/redis-config kubectl get configmap example-redis-config -o yaml ``` ```yaml apiVersion: v1 data: redis-config: | maxmemory 2mb maxmemory-policy allkeys-lru kind: ConfigMap metadata: creationTimestamp: 2016-03-30T18:14:41Z name: example-redis-config namespace: default resourceVersion: "24686" selfLink: /api/v1/namespaces/default/configmaps/example-redis-config uid: 460a2b6e-f6a3-11e5-8ae5-42010af00002 ``` 1. Create a pod specification that uses the config data stored in the ConfigMap: ```yaml apiVersion: v1 kind: Pod metadata: name: redis spec: containers: - name: redis image: kubernetes/redis:v1 env: - name: MASTER value: "true" ports: - containerPort: 6379 resources: limits: cpu: "0.1" volumeMounts: - mountPath: /redis-master-data name: data - mountPath: /redis-master name: config volumes: - name: data emptyDir: {} - name: config configMap: name: example-redis-config items: - key: redis-config path: redis.conf ``` 1. Create the pod: ```shell kubectl create -f docs/user-guide/configmap/redis/redis-pod.yaml ``` In the example, the config volume is mounted at `/redis-master`. It uses `path` to add the `redis-config` key to a file named `redis.conf`. The file path for the redis config, therefore, is `/redis-master/redis.conf`. This is where the image will look for the config file for the redis master. 1. Use `kubectl exec` to enter the pod and run the `redis-cli` tool to verify that the configuration was correctly applied: ```shell kubectl exec -it redis redis-cli 127.0.0.1:6379> CONFIG GET maxmemory 1) "maxmemory" 2) "2097152" 127.0.0.1:6379> CONFIG GET maxmemory-policy 1) "maxmemory-policy" 2) "allkeys-lru" ``` {% endcapture %} {% capture whatsnext %} * Learn more about [ConfigMaps](/docs/tasks/configure-pod-container/configmap/). * See [Using ConfigMap Data in Pods](/docs/tasks/configure-pod-container/configure-pod-configmap). {% endcapture %} {% include templates/tutorial.md %} </ins>

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