Collecting built-in metrics

Istio collects a number of metrics automatically by default. Metrics can be added or removed by changing the configuration at any time. Let's take a look:

1. Let's check out attributemanifest, which is a list of attributes for Kubernetes and Istio:

$ kubectl -n istio-system get attributemanifest
NAME           AGE
istioproxy     5d
kubernetes     5d

As we can see, Kubernetes has its own set of manifest attributes. Istio also provides a set of manifest attributes.

2. Check the attribute list for istioproxy and notice the list of predefined matrices:

$ kubectl -n istio-system get attributemanifest istioproxy -o yaml
...
spec:
 attributes:
   check.error_code:
...
    check.error_code:
 valueType: INT64
 check.error_message:
 valueType: STRING
 connection.duration:
      valueType: DURATION
...

Here, we can see various attributes, such as errorcode, error_message...