Hi Guys,
I hope you are having a good weekend, I would like to have an information
about CounterVec, is there a way to dynamically add Labels inside an
already registered metric?
For example:
Creating a metric using two labels: status and environment
```go
metricName := "test_purposes"
help := "tests"
counter = promauto.NewCounterVec(prometheus.CounterOpts{
Name: metricName,
Help: help,
}, []string{"status", "environment"})
counter.WithLabelValues("success", "dev")
```
But when the status is error I would like to add one more label: reason, to
the same metric and it's not possible
```go
counter = promauto.NewCounterVec(prometheus.CounterOpts{
Name: metricName,
Help: help,
}, []string{"status", "environment", "reason"})
counter.WithLabelValues("success", "dev", "npe")
```
Just to explain why I need it, we're migrating an implementation of datadog
to prometheus and in the implementations based on datadog we have a lot of
microservices sending metrics using different tags (labels) to the same
metric, if I could do the same using the prometheus lib it would be great
because we could only change the client without any modifications on metric
publishers.
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