Bitnami Redis Cluster Helm Chart unable to bind to persistent volumes - kubernetes

Question

I am doing testing which includes the Redis Cluster Bitnami Helm Chart. However, some recent changes to the chart means that I can no longer set the persistence option to false. This is highly irritating, as now the cluster is stuck in pending status with the failure message "0/5 nodes are available: 5 node(s) didn't find available persistent volumes to bind". I assume because it is attempting to fulfill some outstanding PVCs but cannot find a volume. Since this is just for testing and do not need to persist the data to disk, is there a way of disabling this or making a dummy volume? If not, what is the easiest way around this?

Answer 1

As Franxi mentioned in the comments above and provided the PR, there is no way doing a dummy volume. Closest solution for you is to use emptyDir
Note this:
Depending on your environment, emptyDir volumes are stored on whatever medium that backs the node such as disk or SSD, or network storage. However, if you set the emptyDir.medium field to "Memory", Kubernetes mounts a tmpfs (RAM-backed filesystem) for you instead. While tmpfs is very fast, be aware that unlike disks, tmpfs is cleared on node reboot and any files you write count against your container's memory limit.
Examples:
apiVersion: v1
kind: Pod
metadata:
name: test-pd
spec:
containers:
- image: k8s.gcr.io/test-webserver
name: test-container
volumeMounts:
- mountPath: /cache
name: cache-volume
volumes:
- name: cache-volume
emptyDir: {}
Example with emptyDir.medium field:
...
volumes:
- name: ram-disk
emptyDir:
medium: "Memory"
You can also to determine the size limit:
Enable kubelets to determine the size limit for memory-backed volumes (mainly emptyDir volumes).