Expose the Thanos Sidecar's HTTP metrics and gRPC StoreAPI interfaces via a dedicated service. ClusterIP is set to none to allow for full discovery of all endpoints behind the service via in-cluster DNS. This allows for a new ServiceMonitor to then scrape the metrics available on the Sidecar's HTTP port.

A new service has been used so as to separate out the metrics that Prometheus makes available, and the metrics the Thanos Sidecar makes available. The Thanos Mixins from thanos-io/thanos default to a job label of 'thanos-sidecar', and hence the service here has had this label applied.

jsonnet/prometheus-operator.libsonnet: Adjust alerts range

pin release0.6 release

Add scraping of endpoint for kubelet probe metrics

prometheus-adapter: Collect metrics from Prometheus Adapter

Update default ciphers used by kube-rbac-proxy

secure metrics port for scheduler and controller-manager

Remove instance:node_filesystem_usage:sum

jsonnet: update component versions

Regenerate dashboards and prometheus alerts

Merged https://github.com/kubernetes-monitoring/kubernetes-mixin/pull/463 to remove duplicate entries for memory usage, however I'd like to move these changes to the Prometheus-Operator helm chart(https://github.com/helm/charts/pull/23024#issuecomment-661967101). I've regenerated the dashboards/alerts.

Add PrometheusOperatorListErrors and fix PrometheusOperatorWatchErrors threshold 

Watch error alert

chore(jsonnet):   update jsonnet to master

prometheus-operator.libsonnet: Add PrometheusOperatorWatchErrors alert

pulls in recent performance improvement changes to speed up rendering

resolves #537

jsonnet/kube-prometheus: Bump default versions of prometheus and alertmanager