1. telegraf的配置

[root@agent-pg135 log]# cat  /etc/telegraf/telegraf.conf
[global_tags]
[agent]
  interval = "10s"
  round_interval = true
  metric_batch_size = 1000
  metric_buffer_limit = 10000
  collection_jitter = "0s"
  flush_interval = "10s"
  flush_jitter = "0s"
  precision = ""
  debug = true
  quiet = false
  logfile = "/tmp/telegraf.log"
  hostname = ""
  omit_hostname = false

[[outputs.influxdb]]
 # urls = ["http://192.168.1.129:8086"]
  urls = ["http://192.168.162.137:8086"]
  database = "telegraf"
  username = "fxkj"
  password = "123456"

[[inputs.cpu]]
  percpu = true
  totalcpu = true
  collect_cpu_time = false
  report_active = false 
  fieldpass = ["usage_idle", "usage_iowait", "usage_system", "usage_user"]

[[inputs.system]]
fieldpass = ["load1", "load5", "load15"]

[[inputs.mem]]
#fieldpass = ["available"]

[[inputs.disk]]
fieldpass = ["free", "inodes_free", "used_percent"]
ignore_fs = ["tmpfs", "devtmpfs", "devfs", "overlay", "aufs", "squashfs"]

[[inputs.diskio]]
fieldpass = ["read_bytes", "write_bytes", "reads","writes"]

[[inputs.net]]
  interfaces = ["ens33"]
  fieldpass = ["bytes_recv", "bytes_sent"]

[[inputs.netstat]]

[[inputs.processes]]
#  fielddrop = [“wait”,”idle”,”unknown”]

[[inputs.redis]]
  ## specify servers via a url matching:
  ##  [protocol://][:password]@address[:port]
  ##  e.g.
  servers = ['tcp://192.168.1.45:6379']


[[inputs.postgresql]]
#address = "host=127.0.0.1"
address = "postgres://postgres@127.0.0.1:5432/postgres"
#ignored_databases = ["template0", "template1"]
[root@agent-pg135 log]#

日志：logfile = "/tmp/telegraf.log"

2.grafana的名字

Main Databases - PostgreSQL

 3. 参考：https://github.com/influxdata/telegraf/tree/master/plugins/inputs/postgresql

用一个例子来演示会更加清晰