Check: sendfile

new in 2.0

sendfile is a module which takes a json file as parameter, and sends it to metrology servers

Use case

This module is useful if some external systems produces outputs as json results whihc have to be sent to metrology servers for operations , display, alerting.

E.g. : SQL requests, webservices output, external scripts, etc.

Create a check entry

sendfile:
    mysendfile:
        jsonfile: /opt/cmt/demo.json
        frequency: 3600

JSON example

$ cat /opt/cmt/demo.json

[
{ "user":"fred", "last-login-days":4 },
{ "user":"jack", "last-login-days":7 },
{ "user":"igor", "last-login-days":9 }
]

JSON expected format

Expected json is an array (list) of dictionary (hash) like this

[ 
    {"key1":value1, "key2":value2] ... },
    {"key1":value1, "key2":value2] ... },
    {"key1":value1, "key2":value2] ... },
    {"key1":value1, "key2":value2] ... }
]

Keys don't need to be the same accross each dictionary.

Events

One global event is sent for each sendfile check in the configuration with :

cmt_sendfile_name        /opt/cmt/demo.json
cmt_sendfile_lines       3

and all the usual attributes cmt_node,groupe,id, check, module, message...

One or more data events are sent for each line/dictionary in the json file with :

Each key created by appending **cmt_m_**  before the json key name.
An additional attribute is sent : cmt_multievent_id  (line count)

Thus json

[ "key1":value1, "key2":value2] ...

will produce one data event

cmt_m_key1: value1
cmt_m_key2: value2
...

and json:

[ 
    {"key1":value1, "key2":value2] ... },
    {"key1":value1, "key2":value2] ... },
    {"key1":value1, "key2":value2] ... },
    {"key1":value1, "key2":value2] ... }
]

will produce 4 data events with each :

cmt_m_key1: value1
cmt_m_key2: value2
...