I have a data-config.json that is used by my ASP.NET Core application.
The app was built to a image and the goal is to create a Kubernetes environment (using Minikube and a myapp.yaml to create and deploy the Minikube and the pods) and copy the data-config.json from a specific place in my local machine to a directory in the Node (the place I want to be ~/app/publish/data-config.json, in other words, in the root directory of the node).
I read a lot the documentation and I think ConfigMap can be useful in this case. I already implemented a Volume too. But I don't think write the json content inside the ConfigMap configuration is the best way to do that, I want to depend only of the data-config.json file and the YAML.
In the docker-compose.yml file, to test in Docker Desktop, it works and the code is showed above:
dataService:
image: webapp
build:
context: ../..
dockerfile: webapp
container_name: webapp-container
ports:
- "9000:8080"
volumes:
- "../data-service/data-config.json:/app/publish/data-config.json"And it worked. Now I need to translate or find a way to copy this file and save it in the /app/publish/ directory of my node.
You don't do anything like these.
volumes:
- "../data-service/data-config.json:/app/publish/data-config.json"I guess you maybe use data-config.json in your project. So you can use ItemGroup to include the specific file by modifying your your_project_name.csproj file.
You also can refer my answer in below posts:
1. Azure Functions don't publish appsettings.prod.json file
2. Unable to find files located in my root project folder when hosted on Azure
I solved this question by creating a ConfigMap that maps the data-config.json from my local machine directory to the container pod. The example shows the implementation of the YAML file used by Minikube to create and start the cluster:
apiVersion: apps/v1
kind: Deployment
metadata:
name: data-deployment
labels:
app: data-app
spec:
replicas: 1
selector:
matchLabels:
app: data-app
template:
metadata:
labels:
app: data-app
spec:
imagePullSecrets:
- name: regcred
containers:
- name: data-app
image: validation-image:latest
imagePullPolicy: IfNotPresent
ports:
- containerPort: 8080
env:
- name: DataSettings_ConfigPath
value: /app/publish/data-config.json
volumeMounts:
- name: data-config-dir
mountPath: /app/publish/data-config.json
subPath: data-config.json
restartPolicy: Always
hostname: data-service
volumes:
- name: data-config-dir
configMap:
name: data-configmap
items:
- key: data-config.json
path: data-config.jsonPS: you must run the command below in terminal to create the ConfigMap for data-config.json file:
$ kubectl create configmap data-configmap --from-file ../data-service/data-config.json