I'm working on a Java Play project, and in my application.conf file I have a Redis cluster set-up that receives an array of Redis server nodes.
Now, I want to inject that value in Kubernetes deployment as an environment variable and can't find the right syntax to do so.
My current application.conf looks something like this:
play.cache.redis {
# enable cluster mode
source: cluster
# nodes are defined as a sequence of objects:
cluster: [
{
# required string, defining a host the node is running on
host: localhost
# required integer, defining a port the node is running on
port: 6379
# optional string, defines a password to use
password: null
}
]
}Can someone please tell me how to pass the play.cache.redis.cluster variable to a Kubernetes deployment so it stays like this?
You can inject your entire application.conf with a mechanism of ConfigMaps:
apiVersion: v1
kind: ConfigMap
metatada:
name: app-config
data:
application.conf: |
play.cache.redis {
# enable cluster mode
source: cluster
# nodes are defined as a sequence of objects:
cluster: [
{
# required string, defining a host the node is running on
host: localhost
# required integer, defining a port the node is running on
port: 6379
# optional string, defines a password to use
password: null
}
]
}and then mount it directly to your container:
apiVersion: v1
kind: Pod
metadata:
name: ....
spec:
containers:
- name: ...
image: ...
volumeMounts:
- name: config-volume
mountPath: /etc/config
volumes:
- name: config-volume
configMap:
name: app-configThe app can access it then at /etc/config/application.conf.
You can define any env variable into a pod. For this, you need to update your spec section in deployment:
Here is an example:
spec:
containers:
- name: container-name
image: gcr.io/google-samples/node-hello:1.0
env:
- name: VAR_NAME
value: "any var value"
- name: VAR_NAME2
value: "another value"