playbook: Add Wendelin Olimex preperation playbooks

Initial commit for adding automatic preperation of Olimex boards as an IoT Gateway
and for a Sensor to send data to Wendelin (see
https://wendelin.nexedi.com/wendelin-Learning.Track/wendelin-Tutorial.Setup.Sensor.IOTGateway/WebPage_viewAsWeb
).

playbook/roles/fluentd/tasks/main.yml

+- set_fact:
+    request_fluentd_python_script_path={{ role_path }}/files/request-fluentd.py
+
+- name: Solve template to request Fluentd
+  template:
+    src: request-fluentd.j2
+    dest: "{{ request_fluentd_python_script_path }}"
+
+- name: Request Fluentd from SlapOS Master
+  shell: slapos console "{{ request_fluentd_python_script_path }}"

playbook/roles/fluentd/templates/request-fluentd.j2

+# Constants
+fluentd_software_release_uri = product.fluentd
+computer_name = "{{computer_name}}"
+fluentd_software_name = "{{fluentd_software_name}}"
+fluentd_config = """{{fluentd_config}}"""
+
+# Supplying and requesting
+supply(fluentd_software_release_uri, computer_name)
+request(
+    fluentd_software_release_uri,
+    fluentd_software_name,
+    filter_kw={"computer_guid": computer_name},
+    partition_parameter_kw={"conf_text": fluentd_config},
+)

playbook/roles/olimex-sensor/tasks/main.yml

+- name: Install Python
+  apt:
+    name: python
+    state: present
+
+- name: Install pip
+  apt:
+    name: python-pip
+    state: present
+
+- name: Install i2c-tools
+  apt:
+    name: i2c-tools
+    state: present
+
+- name: Install Python package bme280
+  pip:
+    name: bme280
+
+- name: Install python-smbus
+  apt:
+    name: python-smbus
+    state: present
+
+- name: Solve python template to read sensor
+  template:
+    src: read_bme280.j2
+    dest: /usr/local/bin/read_bme280.py

playbook/roles/olimex-sensor/templates/read_bme280.j2

+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+from bme280 import bme280
+from bme280 import bme280_i2c
+from bme280.bme280 import read_all
+
+bme280_i2c.set_default_i2c_address(int("0x77", 0))    # address of sensor 0x77
+bme280_i2c.set_default_bus(int({{ i2c_bus_number }})) # i2c bus number 3 (i2c-3)
+bme280.setup()
+
+data = bme280.read_all()
+
+print("{}\t{}\t{}".format(data.pressure,data.humidity,data.temperature))

playbook/roles/olimex-sensor/vars/main.yml

+i2c_bus_number: "3"

playbook/wendelin-olimex-base.yml

+# Simply import both playbooks so that all variables can be set by the user
+- import_playbook: re6stnet.yml
+- import_playbook: slapos.yml
+ 
+- name: a play that runs entirely on the ansible host
+  hosts: 127.0.0.1
+  connection: local
+
+  vars_prompt:
+    - name: "fluentd_software_name"
+      prompt: "What is the name of your Fluentd Software relase?"
+      private: no
+      default: "Fluentd software release"

playbook/wendelin-olimex-iot-gateway.yml

+# Playbook to prepare Olimex board to act as a IoT Gateway
+# which sends data to a Wendelin instance
+
+- import_playbook: wendelin-olimex-base.yml
+
+- name: a play that runs entirely on the ansible host
+  hosts: 127.0.0.1
+  connection: local
+
+  vars_prompt:
+    - name: "streamtool_uri"
+      prompt: "What is the URL of your Wendelin instance? (e.g. https://softinstXXXX.host.vifib.net)"
+      private: no
+    - name: "tag_name"
+      prompt: "What is your tag name?\nYour tag name must consist of 2 part separated by .(dot). First part is the name of the sensor and must be the same as the reference of the Data Supply. The second part is the type of data (Data Product)."
+      private: no
+      default: "sensor_1.sample-environment-raw-data"
+    - name: "user_name"
+      prompt: "What is the user name for your Wendelin instance?"
+      private: no
+      default: "zope"
+    - name: "user_password"
+      prompt: "What is the password for the user of your Wendelin instance?"
+      private: yes
+
+
+  vars:
+    fluentd_config: |
+      <source>
+      @type forward
+      port 24224
+      bind ::0 
+      </source>
+      <match {{ tag_name }}>
+      @type wendelin
+      streamtool_uri {{ streamtool_uri }}/erp5/portal_ingestion_policies/default
+      user {{ user_name }}
+      password {{ user_password }}
+      <buffer>
+      flush_mode interval
+      @type file
+      path fluentd-buffer-file/
+      flush_interval 1m
+      </buffer>
+
+  roles:
+    - role: fluentd

playbook/wendelin-olimex-sensor.yml

+# Playbook to prepare Olimex board to run a MOD-ENV sensor and
+# parse the tracked data to Fluentd
+
+- import_playbook: wendelin-olimex-base.yml
+
+- name: a play that runs entirely on the ansible host
+  hosts: 127.0.0.1
+  connection: local
+
+  vars_prompt:
+    - name: "ipv6_address_iot_gateway"
+      prompt: "What is the IPv6 address of the host where the data will be send to (IoT Gateway)?"
+      private: no
+    - name: "tag_name"
+      prompt: "What is your tag name?\nYour tag name must consist of 2 part separated by .(dot). First part is the name of the sensor and must be the same as the reference of the Data Supply. The second part is the type of data (Data Product)."
+      private: no
+      default: "sensor_1.sample-environment-raw-data"
+
+  vars:
+    fluentd_config: |
+      <source> 
+      @type exec
+      tag {{ tag_name }}
+      command python /usr/local/bin/custom_read_bme280.py 
+      run_interval 1m 
+      <parse> 
+      keys pressure, humidity, temperature 
+      </parse> 
+      </source>
+      <match {{ tag_name }}> 
+      @type forward 
+      <server>
+      name myserver1 
+      host {{ ipv6_address_iot_gateway }}
+      </server> 
+      </match>
+
+  roles:
+    - role: olimex-sensor
+    - role: fluentd