Update grafana & prometheus docker images #8
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Motivation
As seen below, there is a fix for one of the Grafana dashboards that are currently broken in this project (available since version 0.0.5):
Additionally, upgrading Prometheus to the latest version improves performance as seen here: https://prometheus.io/blog/2017/11/08/announcing-prometheus-2-0
Modifications
Bring Docker images to their most up-to-date version (streamnative/apache-pulsar-grafana-dashboard-k8s:0.0.6, prom/prometheus:v2.17.2) to fix the following issues:
nobody
userNote: upgrading to the latest version of Prometheus (currently v2.17.2) caused the pod to fail with the following error:
open /prometheus/queries.active: permission denied
. In order to fix this issue I followed the instructions from these 2 comments:Verifying this change