Use yum repository to install telegraf on RedHat family

The role does not use a direct download of the rpm package but use the
yum repository for InfluxData products as it is advised in the current
documentation for installation.
https://docs.influxdata.com/telegraf/v1.2/introduction/installation/

README.md

@@ -24,7 +24,6 @@ Role Variables
 The following parameters can be set for the Telegraf agent:
 
 * `telegraf_agent_version`: The version of Telegraf to install. Default: `1.0.0`
-* `telegraf_agent_rpm_url`: The full path to the RPM file located on a webserver.
 * `telegraf_agent_interval`: The interval configured for sending data to the server. Default: `10`
 * `telegraf_agent_debug`: Run Telegraf in debug mode. Default: `False`
 * `telegraf_agent_round_interval`: Rounds collection interval to 'interval' Default: True

defaults/main.yml

@@ -4,7 +4,6 @@
 #telegraf_agent_version: 0.10.1
 telegraf_agent_version: 1.0.0
 telegraf_agent_hostname: "{{ ansible_fqdn }}"
-telegraf_agent_version_sub_l: _beta2
 telegraf_agent_interval: 10
 telegraf_agent_debug: False
 telegraf_agent_round_interval: True
@@ -21,7 +20,6 @@ telegraf_agent_quiet: False
 telegraf_agent_logfile: ""
 telegraf_agent_omit_hostname: False
 
-telegraf_agent_rpm_url: https://dl.influxdata.com/telegraf/releases/telegraf-{{ telegraf_agent_version }}{{ telegraf_agent_version_sub_l }}.x86_64.rpm
 telegraf_agent_tags:
 
 telegraf_agent_output:

tasks/RedHat.yml

@@ -25,14 +25,16 @@
     - pyopenssl
     - ndg-httpsclient
 
-- name: "Fetch telegraf installation package | RedHat"
-  action: get_url
-          url="{{ telegraf_agent_rpm_url }}"
-          dest=/tmp/telegraf_{{ telegraf_agent_version }}.x86_64.rpm
-          mode=0440
+- name: "Add yum repository | RedHat"
+  yum_repository:
+    name: influxdb
+    description: InfluxDB Repository - RHEL $releasever
+    baseurl: https://repos.influxdata.com/rhel/$releasever/$basearch/stable
+    gpgcheck: yes
+    gpgkey: https://repos.influxdata.com/influxdb.key
 
 - name: "Install telegraf package | RedHat"
   action: yum
-          name=/tmp/telegraf_{{ telegraf_agent_version }}.x86_64.rpm
+          name="telegraf-{{ telegraf_agent_version }}"
           state=installed
   notify: "Restart Telegraf"