Handling complex arguments

[stecino]

Hello,

I have the following bash script that uses jq to parse a json file, based on the URL and values to parse for

Here is an example on the command line:
./parse_json.sh "http://blah.com:9000/admin/metrics" \'.gauges."\""heap.init""\".value\',\'.gauges."\""heap.used""\".value\',\'.gauges."\""heap.committed"\"".value\'
268435456 90739040 268435456
Stats | '.gauges."heap.init".value'=268435456;;;0;,'.gauges."heap.used".value'=90739040;;;0;,'.gauges."heap.committed".value'=90739040;;;0;

What I am doing here is breaking for single and double quotes so that parameter looks like this '.gauges."heap.init".value', '.gauges."heap.used".value",'gauges."heap.committed".value

This is my nagios configuration:

Code: Select all

define command{
        command_name    check_parse_json
        command_line    $USER1$/parse_json.sh $ARG1$ $ARG2$
}

define service{
        use                             misc-services
        host_name                       nagios
        service_description             Email Ingestion Heap Stats
        check_command                   check_parse_json!"http://blah.com:9000/admin/metrics"!\'.gauges."\""heap.init""\".value\',\'.gauges."\""heap.used""\".value\',\'.gauges."\""heap.committed"\"".value\'
        contact_groups                  network
        normal_check_interval           5
        notifications_enabled           0
}

Here is what I have in Nagios (Please see attached) It's all nulls. I know it's something with Nagios being able to handle the second parameter. How can I make this work?
Since I don't know how to pass this to Nagios, double quotes around the field name disappear.

Thanks in advance

[jdalrymple]

stecino...

complex is absolutely right. I'll be honest the behavior I was seeing based upon a few different ways I tried to escape various parts of your argument resulted in some pretty random behavior. To keep from going insane I suggest wrapping your argument into your script. If this isn't possible let us know and I'll keep trying to nail down why the escaping is so unpredictable in this string.

[stecino]

stecino...

complex is absolutely right. I'll be honest the behavior I was seeing based upon a few different ways I tried to escape various parts of your argument resulted in some pretty random behavior. To keep from going insane I suggest wrapping your argument into your script. If this isn't possible let us know and I'll keep trying to nail down why the escaping is so unpredictable in this string.

I want to make this argument as dynamic parameter going into the script. So that I can setup monitors for any fields withing json. This should give freedom of extracting value from 1 to n fields and then generate performance data.

[jdalrymple]

Fiddling with it a bit more - it became more obvious how to do it correctly.

Escape the following characters:

Code: Select all

\  "  '

With a backslash. You should end up with this in your service definition:

Code: Select all

check_command                   check_parse_json!"http://blah.com:9000/admin/metrics"!\\\'.gauges.\"\\\"\"heap.init\"\"\\\".value\\\',\\\'.gauges.\"\\\"\"heap.used\"\"\\\".value\\\',\\\'.gauges.\"\\\"\"heap.committed\"

[stecino]

Fiddling with it a bit more - it became more obvious how to do it correctly.

Escape the following characters:

Code: Select all

\  "  '

With a backslash. You should end up with this in your service definition:

Code: Select all

check_command                   check_parse_json!"http://blah.com:9000/admin/metrics"!\\\'.gauges.\"\\\"\"heap.init\"\"\\\".value\\\',\\\'.gauges.\"\\\"\"heap.used\"\"\\\".value\\\',\\\'.gauges.\"\\\"\"heap.committed\"

It worked!! Thanks

[tmcdonald]

I'll be closing this thread now, but feel free to open another if you need anything in the future!