Initial version

Signed-off-by: Knut Ahlers <knut@ahlers.me>
This commit is contained in:
Knut Ahlers 2018-05-07 14:32:58 +02:00
commit af3b0de9e8
Signed by: luzifer
GPG key ID: DC2729FDD34BE99E
6 changed files with 402 additions and 0 deletions

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# luzifer-ansible / telegraf
This role installs telegraf on a host, configures its startup parameters and enables it as a systemd daemon.
## Requirements
- Debian >= 8 (jessie)
- Ubuntu >= 16.04 (xenial)
## Usage
See the [Ansible Galaxy Intro](https://galaxy.ansible.com/intro) for usage of roles within Ansible Galaxy.
For configuration variables and how to use them see [defaults/main.yml](defaults/main.yml).

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---
# See telegraf_agent_.* in templates/telegraf.conf.j2
telegraf_global_tags: {}
telegraf_outputs: {}
telegraf_inputs: {}
telegraf_version: "1.6.1"
...

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---
galaxy_info:
author: Knut Ahlers
description: |
Install and configure telegraf on host
license: Apache
min_ansible_version: 2.3
platforms:
- name: Ubuntu
versions:
- xenial
- name: Debian
versions:
- jessie
- stretch
categories:
#- cloud
#- cloud:ec2
#- cloud:gce
#- cloud:rax
#- clustering
#- database
#- database:nosql
#- database:sql
#- development
- monitoring
#- networking
#- packaging
#- system
#- web
dependencies:
- config_encoder_filters

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---
- name: Get current telegraf version
shell: "/usr/local/bin/telegraf version || true"
check_mode: no
register: telegraf_version_cmd
- name: Download and unpack telegraf release
unarchive:
src: 'https://dl.influxdata.com/telegraf/releases/telegraf-{{ telegraf_version }}-static_linux_amd64.tar.gz'
remote_src: true
dest: /tmp
when: telegraf_version not in telegraf_version_cmd.stdout
- name: Move telegraf to expected position
command: mv /tmp/telegraf/telegraf /usr/local/bin/telegraf
when: telegraf_version not in telegraf_version_cmd.stdout
- name: Cleanup tmp folder
file:
dest: /tmp/telegraf
state: absent
when: telegraf_version not in telegraf_version_cmd.stdout
- name: Install systemd service
copy:
content: |
[Unit]
Description=Telegraf monitoring
After=network-online.target
Requires=network-online.target
[Service]
TimeoutStartSec=0
TimeoutStopSec=0
Restart=on-failure
RestartSec=10
SyslogIdentifier=telegraf
ExecStart=/usr/local/bin/telegraf --config /etc/telegraf.conf
[Install]
WantedBy=multi-user.target
dest: /etc/systemd/system/telegraf.service
register: telegraf_service
- name: Enable systemd service
systemd:
name: telegraf
enabled: true
daemon_reload: true
- name: Write telegraf.conf file
template:
src: templates/telegraf.conf.j2
dest: /etc/telegraf.conf
mode: 0600
owner: root
register: telegraf_config
- name: Restart systemd service
systemd:
name: telegraf
state: restarted
when: packer_build_name is not defined and (telegraf_service.changed or telegraf_config.changed)
...

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# {{ ansible_managed }}
[global_tags]
{% for k,v in telegraf_global_tags.items() %}
{{ k }} = "{{ v }}"
{% endfor %}
# Configuration for telegraf agent
[agent]
## Default data collection interval for all inputs
interval = "{{ telegraf_agent_interval | default('10s') }}"
## Rounds collection interval to 'interval'
## ie, if interval="10s" then always collect on :00, :10, :20, etc.
round_interval = {{ telegraf_agent_round_interval | default(true) | to_nice_json }}
## 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 = {{ telegraf_agent_metric_batch_size | default(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 = {{ telegraf_agent_metric_buffer_limit | default(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 = "{{ telegraf_agent_collection_jitter | default('0s') }}"
## Default flushing interval for all outputs. You shouldn't set this below
## interval. Maximum flush_interval will be flush_interval + flush_jitter
flush_interval = "{{ telegraf_agent_flush_interval | default('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 = "{{ telegraf_agent_flush_jitter | default('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 = "{{ telegraf_agent_precision | default('') }}"
## Logging configuration:
## Run telegraf with debug log messages.
debug = {{ telegraf_agent_debug | default(false) | to_nice_json }}
## Run telegraf in quiet mode (error log messages only).
quiet = {{ telegraf_agent_quiet | default(false) | to_nice_json }}
## Specify the log file name. The empty string means to log to stderr.
logfile = "{{ telegraf_agent_logfile | default('') }}"
## Override default hostname, if empty use os.Hostname()
hostname = "{{ telegraf_agent_hostname | default('') }}"
## If set to true, do no set the "host" tag in the telegraf agent.
omit_hostname = {{ telegraf_agent_omit_hostname | default(false) | to_nice_json }}
{% for name, config in telegraf_outputs.items() %}
[[ outputs.{{ name }} ]]
{{ config | encode_toml }}
{% endfor %}
{% for name, config in telegraf_inputs.items() %}
[[ inputs.{{ name }} ]]
{{ config | encode_toml }}
{% endfor %}
# vim: set ft=toml: