output formatting guide

[mpounsett]

Original report by Christian Kauhaus (Bitbucket: ckauhaus, GitHub: ckauhaus).

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show how to:

• provide custom fmt_metric
• subclass Context and override describe()
• subclass Summary

[mpounsett]

Original comment by Christian Kauhaus (Bitbucket: ckauhaus, GitHub: ckauhaus).

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Quan Tong Anh:

How to show different fmt_metric based on the value?

I'm writing a Nagios plugin that use xml output from sslyze to calculate SSL score based on Qualys Server Rating Guide.

Here're my code:

#!python
                if certificateMatchesServerHostname == 'True' and expire_in.days > 0 and validationResult == 'ok':
                    ...
                    final_score = protocol_score * 0.3 + key_score * 0.3 + cipher_score * 0.4
                    return [nap.Metric('sslscore', final_score, min=0, max=100)]
                elif certificateMatchesServerHostname != 'True':
                    return [nap.Metric('serverHostname', hostnameValidation[0].attrib['serverHostname'])]
                elif expire_in.days <= 0:
                    return [nap.Metric('expireInDays', expire_in.days)]
                elif validationResult != 'ok':
                    return [nap.Metric('validationResult', validationResult)]

    @nap.guarded
    def main():
        check = nap.Check(
            SslConfiguration(),
            nap.ScalarContext('sslscore', nap.Range('@65:80'), nap.Range('@0:65')),
            nap.ScalarContext('serverHostname', fmt_metric='The certificate does not match the host name {value}'),
            nap.ScalarContext('expireInDays', nap.Range('@:0'), fmt_metric='The certificate expired {value} days ago'),
            nap.ScalarContext('validationResult', fmt_metric='This server\'s certificate is not trusted: {value}'))
        check.main(timeout=60)

The reason I have to use multiple ScalarContext is I would like to show different fmt_metric if there is a problem with SSL certificate: does not match, expired, not trust, ...

With the above code, the output looks something like this:

SSLCONFIGURATION CRITICAL - The certificate does not match the host name a.b.c.d (outside range 0:) critical: The certificate does not match the host name a.b.c.d (outside range 0:) | serverHostname=a.b.c.d

What I really want to display is:

SSLCONFIGURATION CRITICAL - final_score is 0 (The certificate does not match the host name a.b.c.d) | sslscore=0;@65:80;@65;0;100

So, I have some questions:

1. How can I display different fmt_metric based on the sslscore value, in only one context sslscore?

2. How to remove the redundant line (2nd)?

   critical: The certificate does not match the host name a.b.c.d (outside range 0:)

3. How to move the metric (3rd line) to at the end of the first line?