βΈοΈConfig Map
Describe about What is Config map?
When we would like to add the env variable to Pod
, we can do it by add the property called env in definition file
# Pod Template
apiVersion: v1
kind: Pod
metadata:
name: nginx
spec:
containers:
- name: nginx
image: nginx:1.14.2
ports:
- containerPort: 80
env:
- name:
value:
- name:
value:
# For ConfigMap case (1)
- name: APP_COLOR
valueFrom:
configMapRef:
name: app-config
key: APP_COLOR
# For ConfigMap case (2)
envFrom:
- configMapRef:
name:
# For ConfigMap case (3)
volumes:
- name: app-config-volume
configMap:
name: app-config
but It's hard to manage in the configuration in definition file
so we have Config map
for managing the configuration
CheatSheet
Create Configmap (Imperative way):
kubectl create configmap <config_name> --from-literal=<key>=<value>
kubectl create configmap <config_name> --from-file=<path_to_file>
Create Configmap (Declarative way):
# Configmap Template
apiVersion: v1
kind: ConfigMap
metadata:
name: <configmap_name>
data:
<key>: <value>
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