148422597X Kubernetes Management Design Patterns [Vohra 2017-01-29] {E559F6BB}

Chapter 11 ■ Using ConfigMaps
Next, consume the ConfigMap in a replication controller; to do that, create a definition file mysql.yaml:
sudo vi mysql.yaml
Use the config map mysql-config to obtain environment variable values for the MySQL database
Docker image mysql.
---
apiVersion: v1
kind: ReplicationController
metadata:
labels:
app: mysql-app
name: mysql
spec:
replicas: 3
selector:
app: mysql-app
template:
metadata:
labels:
app: mysql-app
spec:
containers:
-
env:
-
name: MYSQL_ROOT_PASSWORD
valueFrom:
configMapKeyRef:
key: mysql.root.password
name: mysql-config
-
name: MYSQL_DATABASE
valueFrom:
configMapKeyRef:
key: mysql.database
name: mysql-config
-
name: MYSQL_USER
valueFrom:
configMapKeyRef:
key: mysql.user
name: mysql-config
-
name: MYSQL_PASSWORD
valueFrom:
configMapKeyRef:
key: mysql.user
name: mysql-config
-
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