i have a question to ask you about kubernates. I need to configure a Horizontal Load Balancer on a service with Kubernates. Specifically in my yaml file I used the following kind: HorizontalPodAutoscaler; the problem arises on the logic of uploading files to the volume: in a nutshell, when a pod is released, the data inside is overwritten, so with a new pod the volume is emptied. Am I wrong in configurations? Specifically, I set the volume in the Dockerfile to build the corresponding image of the service launched with Kubernates.
CodePudding user response:
it's not good idea to store data in Dockerimage however still what you can do is,
- Copy data to docker image
- Inside the Kubernetes POD create the PVC volume
- Attach POD to PVC and use the volume mount
- Use the init container to copy data from the docker path to the volume mount file path
Dockerfile
FROM python:latest
COPY data.csv ./tmp/
Kubernetes YAML
apiVersion: apps/v1
kind: Deployment
metadata:
name: POD-name
spec:
replicas: 2
selector:
matchLabels:
app: test
template:
metadata:
labels:
app: test
spec:
initContainers:
- name: copy
image: busybox:1.28
command: ["/bin/sh", "-c", "cp /tmp/data.csv /data/data.csv"]
volumeMounts:
- name: pvc
mountPath: /data/
containers:
- name: test
image: image:tag
ports:
- containerPort: 8080
env:
- name: PORT
value: "8080"
volumeMounts:
- mountPath: "/data/"
name: pvc
volumes:
- name: pvc
persistentVolumeClaim:
claimName: pvc-claim