telegraf

文件

產生 config file

telegraf -sample-config > telegraf.conf
telegraf -sample-config -input-filter cpu:mem -output-filter influxdb > telegraf.conf

Start Telegraf Server

X Homebrew

telegraf -config telegraf.conf

debian and RPM packages

sudo service telegraf start

systemctl start telegraf

Config

Output Plugin List

Input Plugin List

[agent]

interval: 預設搜集所有輸入的時間間隔 Default data collection interval for all inputs
round_interval: Rounds collection interval to ‘interval’ ie, if interval=”10s” then always collect on :00, :10, :20, etc.
metric_buffer_limit: Telegraf will cache metric_buffer_limit metrics for each output, and will flush this buffer on a successful write.
collection_jitter: 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.
flush_interval: Default data flushing interval for all outputs. You should not set this below interval. Maximum flush_interval will be flush_interval + flush_jitter
flush_jitter: 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 flush_interval 10s means flushes will happen every 10-15s.
debug: Run telegraf in debug mode.
quiet: Run telegraf in quiet mode.
hostname: Override default hostname, if empty use os.Hostname().

[inputs.xxx]

name_override: Override the base name of the measurement. (Default is the name of the input).
name_prefix: Specifies a prefix to attach to the measurement name.
name_suffix: Specifies a suffix to attach to the measurement name.
tags: A map of tags to apply to a specific inputs measurements.
interval: How often to gather this metric. Normal plugins use a single global interval, but if one particular input should be run less or more often, you can configure that here.

Input filter

pass: An array of strings that is used to filter metrics generated by the current input. Each string in the array is tested as a glob match against field names and if it matches, the field is emitted.
drop: The inverse of pass, if a field name matches, it is not emitted.
tagpass: tag names and arrays of strings that are used to filter measurements by the current input. Each string in the array is tested as a glob match against the tag name, and if it matches the measurement is emitted.
tagdrop: The inverse of tagpass. If a tag matches, the measurement is not emitted. This is tested on measurements that have passed the tagpass test.

tagdrop

# 不搜集 cpu6 cpu7 的 cpu 資料
[[inputs.cpu]]
  percpu = true
  totalcpu = false
  drop = ["cpu_time"]
  # Don't collect CPU data for cpu6 & cpu7
  [inputs.cpu.tagdrop]
    cpu = [ "cpu6", "cpu7" ]

tagpass

tagpass conditions are OR, not AND.

# 如果 filesystem 是 ext4 或 xfs 或者路徑為 /opt 或 /home 可以通過
[[inputs.disk]]
  [inputs.disk.tagpass]
    # tagpass conditions are OR, not AND.
    # If the (filesystem is ext4 or xfs) OR (the path is /opt or /home)
    # then the metric passes
    fstype = [ "ext4", "xfs" ]
    # Globs can also be used on the tag values
    path = [ "/opt", "/home*" ]

drop

#過濾掉開頭為 time_ 的欄位(fields)
[[inputs.cpu]]
  # filter all fields beginning with 'time_'
  drop = ["time_*"]

# Drop all metrics for guest & steal CPU usage
[[inputs.cpu]]
  percpu = false
  totalcpu = true
  drop = ["usage_guest", "usage_steal"]

pass

# 只有 inode 相關能通過
# Only store inode related metrics for disks
[[inputs.disk]]
  pass = ["inodes*"]

prefix, suffix

# cpu_total
[[inputs.cpu]]
  name_suffix = "_total"
  percpu = false
  totalcpu = true

override

# foobar
[[inputs.cpu]]
  name_override = "foobar"
  percpu = false
  totalcpu = true

tags

# 多兩個 tag，分別是 tag1=foo 跟 tag2=bar
[[inputs.cpu]]
  percpu = false
  totalcpu = true
  [inputs.cpu.tags]
    tag1 = "foo"
    tag2 = "bar"

Multiple inputs of the same type

# 建議搭配使用 name_override, name_prefix, or name_suffix
[[inputs.cpu]]
  percpu = false
  totalcpu = true

[[inputs.cpu]]
  percpu = true
  totalcpu = false
  name_override = "percpu_usage"
  drop = ["cpu_time*"]