add prometheus role

roles/prometheus/README.md

@@ -0,0 +1,50 @@
+genlab.prometheus
+=========
+
+This ansible role installs [Prometheus](https://github.com/prometheus/prometheus) from binary distribution. Prometheus is a systems and service monitoring system. It collects metrics from configured targets at given intervals, evaluates rule expressions, displays the results, and can trigger alerts when specified conditions are observed.
+
+Prometheus configuration files and rules should be placed in separate directories in the source. They must have a `*.yml` suffix. You'll need to manually specify the paths to your rule files in the main Prometheus configuration file (prometheus.yml) on the target machine
+
+Requirements
+------------
+
+None
+
+Role Variables
+--------------
+```
+prometheus_version: 3.2.1                 # prometheus version
+prometheus_dir: "/etc/prometheus"         # where to install prometheus
+prometheus_user: prometheus               # user name
+prometheus_group: prometheus              # groups name
+config_dir: "/etc/prometheus/conf"        # where to place prometheus config
+db_dir: "/var/lib/prometheus"             # where to store prometheus db
+config_source_dir: prometheus             # path to config files on source
+alertrules_source_dir: prometheus/rules   # path to rule files  on source
+```
+
+Dependencies
+------------
+
+None
+
+Example Playbook
+----------------
+
+```yaml
+roles:
+    - role: genlab.prometheus
+      config_source_dir: mydir/configs
+      alertrules_source_dir: mydir/configs/rules
+      prometheus_version: 3.2.1
+```
+
+License
+-------
+
+BSD
+
+Author Information
+------------------
+
+corvus-migratorius@proton.me