Use 8080 as the default metrics port and fix docs references (DataDog#22860)

* Fix default metrics port

* Add changelog line

Author: briancurt

karpenter/assets/configuration/spec.yaml

@@ -10,7 +10,7 @@ files:
       options:
         - template: instances/openmetrics
           overrides:
-            openmetrics_endpoint.value.example: http://localhost:8000/metrics
+            openmetrics_endpoint.value.example: http://localhost:8080/metrics
             openmetrics_endpoint.description: |
               Endpoint exposing the Karpenter's Prometheus metrics. For more information refer to:
-              https://karpenter.sh/docs/concepts/metrics/
+              https://karpenter.sh/docs/reference/metrics/

karpenter/changelog.d/22860.fixed

@@ -0,0 +1 @@
+Use `8080` as the default metrics port and fix docs references

karpenter/datadog_checks/karpenter/config_models/validators.py

@@ -9,7 +9,7 @@ def initialize_instance(values, **kwargs):
         validate_url(
             values['openmetrics_endpoint'],
             required_path='/metrics',
-            example='http://localhost:8000/metrics',
+            example='http://localhost:8080/metrics',
             config='openmetrics_endpoint',
         )
 

karpenter/datadog_checks/karpenter/data/conf.yaml.example

@@ -47,9 +47,9 @@ instances:
 
     ## @param openmetrics_endpoint - string - required
     ## Endpoint exposing the Karpenter's Prometheus metrics. For more information refer to:
-    ## https://karpenter.sh/docs/concepts/metrics/
+    ## https://karpenter.sh/docs/reference/metrics/
     #
-  - openmetrics_endpoint: http://localhost:8000/metrics
+  - openmetrics_endpoint: http://localhost:8080/metrics
 
     ## @param raw_metric_prefix - string - optional
     ## A prefix that is removed from all exposed metric names, if present.

karpenter/tests/common.py

@@ -7,7 +7,7 @@
 
 HERE = get_here()
 HOST = get_docker_hostname()
-PORT = 8000
+PORT = 8080
 
 
 def get_fixture_path(filename):

karpenter/tests/docker/Caddyfile

@@ -1,4 +1,4 @@
-:8000 {
+:8080 {
   root * /metrics
   file_server
 }

karpenter/tests/docker/docker-compose.yaml

@@ -5,7 +5,7 @@ services:
     image: caddy:2.7
     container_name: caddy
     ports:
-      - "8000:8000"
+      - "8080:8080"
     volumes:
       - ./Caddyfile:/etc/caddy/Caddyfile
       - ../fixtures/karpenter_metrics.txt:/metrics/metrics