commit 4009c04811f97bba9db524ed2104695e22f9a097
author Oscar Espitia <nickelozz@users.noreply.github.com> Wed Apr 29 04:25:32 2020 -0400
committer GitHub <noreply@github.com> Wed Apr 29 01:25:32 2020 -0700
tree a3c66d5af90b2a478e49b08cf3cb853e7a9419fc
parent 3e451fecb34b3a72b51c72a1c59cbeaf44e9b179

Update grafana & prometheus docker images (#8)

### 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):
- [The Pulsar-topics metrics can't load in Grafana](https://github.com/streamnative/charts/issues/49)

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:
- https://github.com/streamnative/charts/issues/49 <- fixes Pulsar-topics metrics failure to load
- https://github.com/prometheus/prometheus/pull/2859 <- prevent escalation vulnerabilities by defaulting to the ```nobody``` user

**Note**: 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:

- [Permission denied UID/GID solution](https://github.com/prometheus/prometheus/issues/5976#issuecomment-532942295)
- [Unable to create mmap-ed active query log securityContext fix](https://github.com/aws/eks-charts/issues/21#issuecomment-607031756)

### Verifying this change

- [x] Make sure that the change passes the CI checks.