After running the install command for Istio via Helm,

I'm getting this:

My prometheus-f556886b8-96kjv                0/1       CrashLoopBackOff

if i run:

kubectl -n istio-system logs -f prometheus-f556886b8-96kjv 

I see:

level=error ts=2019-01-22T04:15:25.485061247Z caller=main.go:597 err="Opening storage failed mkdir data/: permission denied"