# missing Automation
# curl -s https://repos.influxdata.com/influxdata-archive_compat.key > influxdata-archive_compat.key
# echo '393e8779c89ac8d958f81f942f9ad7fb82a25e133faddaf92e15b16e6ac9ce4c influxdata-archive_compat.key' | sha256sum -c && cat influxdata-archive_compat.key | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/influxdata-archive_compat.gpg > /dev/null
# echo 'deb [signed-by=/etc/apt/trusted.gpg.d/influxdata-archive_compat.gpg] https://repos.influxdata.com/debian stable main' | sudo tee /etc/apt/sources.list.d/influxdata.list
# sudo apt-get update && sudo apt-get install telegraf

- name: Install Telegraf
  become: true
  ansible.builtin.package:
    name:
      - telegraf
    state: latest

- name: Enable Telegraf Service
  become: true
  ansible.builtin.service:
    name: telegraf
    enabled: true


- name: Setup Telegraf Agent Config
  become: true
  copy:
    dest: "/etc/telegraf/telegraf.d/myInfra-01-agent.conf"
    content: |
     # file created automatically by ansiable myInfra.rsyslog-client role
     [global_tags]
        # dc = "us-east-1" # will tag all metrics with dc=us-east-1
        # rack = "1a"
        ## Environment variables can be used as tags, and throughout the config file
        # user = "$USER"


      # Configuration for telegraf agent
      [agent]
        ## Default data collection interval for all inputs
        interval = "10s"
        ## 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

        ## Maximum number of unwritten metrics per output.  Increasing this value
        ## allows for longer periods of output downtime without dropping metrics at the
        ## cost of higher maximum memory usage.
        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"

        ## Collection offset is used to shift the collection by the given amount.
        ## This can be be used to avoid many plugins querying constraint devices
        ## at the same time by manually scheduling them in time.
        # collection_offset = "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"

        ## Collected metrics are rounded to the precision specified. Precision is
        ## specified as an interval with an integer + unit (e.g. 0s, 10ms, 2us, 4s).
        ## Valid time units are "ns", "us" (or "µs"), "ms", "s".
        ##
        ## 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.
        precision = "0s"

        ## Log at debug level.
        # debug = false
        ## Log only error level messages.
        quiet = false

        ## Log target controls the destination for logs and can be one of "file",
        ## "stderr" or, on Windows, "eventlog".  When set to "file", the output file
        ## is determined by the "logfile" setting.
        logtarget = "file"

        ## Name of the file to be logged to when using the "file" logtarget.  If set to
        ## the empty string then logs are written to stderr.
        logfile = "var/log/telegraf.log"

        ## The logfile will be rotated after the time interval specified.  When set
        ## to 0 no time based rotation is performed.  Logs are rotated only when
        ## written to, if there is no log activity rotation may be delayed.
        # logfile_rotation_interval = "0h"

        ## The logfile will be rotated when it becomes larger than the specified
        ## size.  When set to 0 no size based rotation is performed.
        logfile_rotation_max_size = "100MB"

        ## Maximum number of rotated archives to keep, any older logs are deleted.
        ## If set to -1, no archives are removed.
        # logfile_rotation_max_archives = 5

        ## Pick a timezone to use when logging or type 'local' for local time.
        ## Example: America/Chicago
        # log_with_timezone = ""

        ## 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

  notify:
    - restart_telegraf

- name: Setup Telegraf Influxdb Config
  become: true
  copy:
    dest: "/etc/telegraf/telegraf.d/myInfra-02-influxdb.conf"
    content: |
      [[outputs.influxdb_v2]] 
      #   ## The URLs of the InfluxDB cluster nodes.
      #   ##
      #   ## Multiple URLs can be specified for a single cluster, only ONE of the
      #   ## urls will be written to each interval.
      #   ##   ex: urls = ["https://us-west-2-1.aws.cloud2.influxdata.com"]
      urls = ["{{telegraf_influxdb_url}}"]

      ## Token for authentication.
      token = "{{telegraf_influxdb_token}}"
      #
      #   ## Organization is the name of the organization you wish to write to.
      organization = "{{telegraf_influxdb_org}}"
      #
      #   ## Destination bucket to write into.
      bucket = "{{telegraf_influxdb_bucket}}"
      #
  notify:
    - restart_telegraf

- name: Setup Telegraf Inputs Config
  become: true
  copy:
    dest: "/etc/telegraf/telegraf.d/myInfra-03-inputs.conf"
    content: |
      # Read metrics about cpu usage
      [[inputs.cpu]]
        ## Whether to report per-cpu stats or not
        percpu = true
        ## Whether to report total system cpu stats or not
        totalcpu = true
        ## If true, collect raw CPU time metrics
        collect_cpu_time = false
        ## If true, compute and report the sum of all non-idle CPU states
        report_active = false


      # Read metrics about disk usage by mount point
      [[inputs.disk]]
        ## By default stats will be gathered for all mount points.
        ## Set mount_points will restrict the stats to only the specified mount points.
        # mount_points = ["/"]

        ## Ignore mount points by filesystem type.
        ignore_fs = ["tmpfs", "devtmpfs", "devfs", "iso9660", "overlay", "aufs", "squashfs"]

      [[inputs.diskio]]

      [[inputs.kernel]]

      [[inputs.mem]]

        # Get the number of processes and group them by status
      [[inputs.processes]]
        # no configuration


      # Read metrics about swap memory usage
      [[inputs.swap]]
        # no configuration


      # Read metrics about system load & uptime
      [[inputs.system]]
        # no configuration


      # Read metrics about network interface usage
      [[inputs.net]]
        ## By default, telegraf gathers stats from any up interface (excluding loopback)
        ## Setting interfaces will tell it to gather these explicit interfaces,
        ## regardless of status.
        ##
        ## interfaces = ["eth0"]

  notify:
    - restart_telegraf