Add some of the setup for the SNMP exporter (incomplete implementation)

prometheus/generic/setup-snmp-exporter/README.md

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+setup-snmp-exporter
+==================
+
+This role will instantiate a snmp-exporter container on targeted hosts.
+
+Requirements
+------------
+
+Docker must be available and running on the targeted hosts.
+
+[Configuration instructions coming soon]

prometheus/generic/setup-snmp-exporter/defaults/main.yml

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+---
+snmp_exporter_image: 'prom/snmp-exporter'
+snmp_exporter_image_version: 'latest'
+snmp_exporter_port: '9116'
+
+provision_state: "started"

prometheus/generic/setup-snmp-exporter/tasks/docker.yml

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+---
+- name: Run the snmp_exporter
+  docker_container:
+    name: snmp_exporter
+    image: "{{ snmp_exporter_image }}:{{ snmp_exporter_image_version }}"
+    restart_policy: unless-stopped
+    network_mode: "host"
+    state: "{{ provision_state }}"
+    published_ports:
+    - "{{ snmp_exporter_port }}:9116"

prometheus/generic/setup-snmp-exporter/tasks/main.yml

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+---
+- name: Run prereqs
+  import_tasks: prereqs.yml
+
+- name: Run the docker images
+  import_tasks: docker.yml

prometheus/generic/setup-snmp-exporter/tasks/prereqs.yml

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+---
+- name: Ensure epel-release is installed
+  yum:
+    name: "{{ item }}"
+    state: present
+  with_items:
+  - epel-release
+
+- name: Ensure pip is installed
+  yum:
+    name: "{{ item }}"
+    state: present
+  with_items:
+  - python3-pip
+
+- name: Install required python libraries
+  pip:
+    name: "docker-py"
+    state: present