telegraf/plugins/inputs/http_response/README.md

HTTP Response Input Plugin

This input plugin checks HTTP/HTTPS connections.

Configuration:

# HTTP/HTTPS request given an address a method and a timeout
[[inputs.http_response]]
  ## Deprecated in 1.12, use 'urls'
  ## Server address (default http://localhost)
  # address = "http://localhost"

  ## List of urls to query.
  # urls = ["http://localhost"]

  ## Set http_proxy (telegraf uses the system wide proxy settings if it's is not set)
  # http_proxy = "http://localhost:8888"

  ## Set response_timeout (default 5 seconds)
  # response_timeout = "5s"

  ## HTTP Request Method
  # method = "GET"

  ## Whether to follow redirects from the server (defaults to false)
  # follow_redirects = false

  ## Optional HTTP Request Body
  # body = '''
  # {'fake':'data'}
  # '''

  ## Optional substring or regex match in body of the response (case sensitive)
  # response_string_match = "\"service_status\": \"up\""
  # response_string_match = "ok"
  # response_string_match = "\".*_status\".?:.?\"up\""

  ## Optional TLS Config
  # tls_ca = "/etc/telegraf/ca.pem"
  # tls_cert = "/etc/telegraf/cert.pem"
  # tls_key = "/etc/telegraf/key.pem"
  ## Use TLS but skip chain & host verification
  # insecure_skip_verify = false

  ## HTTP Request Headers (all values must be strings)
  # [inputs.http_response.headers]
  #   Host = "github.com"

Metrics:

• http_response
  • tags:
    • server (target URL)
    • method (request method)
    • status_code (response status code)
    • result (see below)
  • fields:
    • response_time (float, seconds)
    • response_string_match (int, 0 = mismatch / body read error, 1 = match)
    • http_response_code (int, response status code)
    • result_type (string, deprecated in 1.6: use result tag and result_code field)
    • result_code (int, see below)

result / result_code

Upon finishing polling the target server, the plugin registers the result of the operation in the result tag, and adds a numeric field called result_code corresponding with that tag value.

This tag is used to expose network and plugin errors. HTTP errors are considered a successful connection.

Tag value	Corresponding field value	Description
success	0	The HTTP request completed, even if the HTTP code represents an error
response_string_mismatch	1	The option response_string_match was used, and the body of the response didn't match the regex. HTTP errors with content in their body (like 4xx, 5xx) will trigger this error
body_read_error	2	The option response_string_match was used, but the plugin wans't able to read the body of the response. Responses with empty bodies (like 3xx, HEAD, etc) will trigger this error
connection_failed	3	Catch all for any network error not specifically handled by the plugin
timeout	4	The plugin timed out while awaiting the HTTP connection to complete
dns_error	5	There was a DNS error while attempting to connect to the host

Example Output:

http_response,method=GET,server=http://www.github.com,status_code=200,result=success http_response_code=200i,response_time=6.223266528,result_type="success",result_code=0i 1459419354977857955