Monitoring Hub

Added features:

Monitoring Hub on docker

• collectd + Graphite for infra metrics collection
• Grafana + grafana renderer for visualization
• Zabbix server, postgresql storage and web UI
• nginx/certbot letsencrypt SSL cert autorenewal

https://github.com/reefactor/org.backbone/tree/master/roles/monitoring_hub/files/monitoring_hub

TCP tunnel with docker and socat

• trivial command-line: socat-tunnel/docker-run-socat.sh
• convinient compose config: socat-tunnel/docker-compose.yml

Minor updates

• nextcloud 20.0.1
• gitlab CI fixes
• ssh users role with different access level

Replace Graphite with Prometheus

• Replace Graphite with Prometheus & update Grafana
• Openmediavault 5 deploy playbook

OpenVPN simplified

Simplified setup, supported Debian and Redhat, updated dependency to Stouts.openvpn 3.1.1