general telegraf config for ras pi

main.yml

---

- name: Set hostname
  become: true
  tags: host
  hostname:
    name: "{{ hostvars[inventory_hostname].hostname }}"

- name: Copy over hosts file
  become: true
  tags: host
  template:
    src: "{{ role_path }}/files/hosts"
    dest: /etc/hosts
    owner: root
    mode: 0644

- name: Install apt packages
  become: true
  apt:
    force_apt_get: true
    pkg:
    - python-rpi.gpio
    - python3-rpi.gpio
    - i2c-tools
    - build-essential
    - python-pip
    - python-dev
    - python-smbus
    - python3-pip
    state: present

- name: Install pip3 packages
  become: true
  pip:
    name:
    - adafruit-circuitpython-bme280
    state: present
    executable: pip3

- name: Import InfluxData GPG signing key
  tags: tg
  apt_key:
    url: https://repos.influxdata.com/influxdb.key
    state: present

- name: Add InfluxData repository
  tags: tg
  apt_repository:
    repo: deb https://repos.influxdata.com/debian stretch stable
    state: present
  when: telegraf_install_url is not defined or telegraf_install_url == None

- name: Install telegraf packages
  tags: tg
  apt:
    pkg: telegraf
    state: latest

- name: Copy over python script
  become: true
  tags: python
  template:
    src: "{{ role_path }}/files/Get-BME280Stats.py"
    dest: "{{ python_script_path }}"
    owner: pi
    mode: 0755

- name: Copy over telegraf.conf
  tags: tg, host
  template:
    src: "{{ role_path }}/files/telegraf.conf"
    dest: "{{ telegraf_conf_path }}"
  register: telegrafconf

- name: Set telegraf user groups
  tags: tg
  user:
    groups:
    - i2c
    - telegraf
    name: telegraf

- name: Restart telegraf
  tags: tg
  service:
    name: telegraf
    state: restarted
  when: telegrafconf.changed

- name: Ensure Telegraf is running and set to start
  tags: tg
  service:
    name: telegraf
    state: started
    enabled: yes

telegraf.conf

# Telegraf Configuration

# Global tags can be specified here in key="value" format.
[global_tags]

# Configuration for telegraf agent
[agent]
  ## Default data collection interval for all inputs
  interval = "{{ telegraf_agent_interval }}"
  ## Rounds collection interval to 'interval'
  ## ie, if interval="10s" then always collect on :00, :10, :20, etc.
  round_interval = true

  ## Telegraf will send metrics to outputs in batches of at most
  ## metric_batch_size metrics.
  ## This controls the size of writes that Telegraf sends to output plugins.
  metric_batch_size = 1000

  ## For failed writes, telegraf will cache metric_buffer_limit metrics for each
  ## output, and will flush this buffer on a successful write. Oldest metrics
  ## are dropped first when this buffer fills.
  ## This buffer only fills when writes fail to output plugin(s).
  metric_buffer_limit = 10000

  ## Collection jitter is used to jitter the collection by a random amount.
  ## Each plugin will sleep for a random time within jitter before collecting.
  ## This can be used to avoid many plugins querying things like sysfs at the
  ## same time, which can have a measurable effect on the system.
  collection_jitter = "0s"

  ## Default flushing interval for all outputs. Maximum flush_interval will be
  ## flush_interval + flush_jitter
  flush_interval = "10s"
  ## Jitter the flush interval by a random amount. This is primarily to avoid
  ## large write spikes for users running a large number of telegraf instances.
  ## ie, a jitter of 5s and interval 10s means flushes will happen every 10-15s
  flush_jitter = "0s"

  ## By default or when set to "0s", precision will be set to the same
  ## timestamp order as the collection interval, with the maximum being 1s.
  ##   ie, when interval = "10s", precision will be "1s"
  ##       when interval = "250ms", precision will be "1ms"
  ## Precision will NOT be used for service inputs. It is up to each individual
  ## service input to set the timestamp at the appropriate precision.
  ## Valid time units are "ns", "us" (or "µs"), "ms", "s".
  precision = ""

  ## Logging configuration:
  ## Run telegraf with debug log messages.
  debug = false
  ## Run telegraf in quiet mode (error log messages only).
  quiet = false
  ## Specify the log file name. The empty string means to log to stderr.
  # logfile = "/home/pi/tlog.log"

  ## Override default hostname, if empty use os.Hostname()
  hostname = ""
  ## If set to true, do no set the "host" tag in the telegraf agent.
  omit_hostname = false


###############################################################################
#                            OUTPUT PLUGINS                                   #
###############################################################################

[[outputs.influxdb]]
  ## The full HTTP or UDP URL for your InfluxDB instance.
  ## Multiple URLs can be specified for a single cluster, only ONE of the
    urls = ["{{ telegraf_output_urls }}"]

  ## The target database for metrics; will be created as needed.
   database = "{{ telegraf_output_database }}"

  ## HTTP User-Agent
   user_agent = "telegraf"

###############################################################################
#                            INPUT PLUGINS                                    #
###############################################################################

[[inputs.exec]]
 command = "{{ python_script_path }}"
 data_format = "json"
 name_suffix = "_{{ hostvars[inventory_hostname].hostname }}_{{ hostvars[inventory_hostname].location }}"