Each group of targets in your SD file can have both 'targets' and 'labels'
keys. The 'labels' are applied to all targets in that particular group. For
example:
- targets:
- foo 1.2.2.2
- bar 2.2.2.2
labels:
module: icmp
- targets:
- baz http://3.3.3.3
- qux http://4.4.4.4
labels:
module: http_2xx
Then, in the rewriting rules I gave you, one of the rules was this:
- source_labels: [module]
target_label: __param_module
This copies the "module" label to "__param_module", which is used as the
HTTP query parameter in the scrape of blackbox_exporter.
Doing it this way means you only need a single scrape job, even when using
different blackbox modules with different targets. Also, you can set other
labels to categorise your targets, like "env: prod" say, which can be used
in queries, alerting rules etc.
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