Make sure emitted resource metrics have distinct resources by default

This is done by enabling and renaming the following resource attributes:
    - proxy_name -> haproxy.proxy_name
    - service_name -> haproxy.service_name

.chloggen/haproxy-fix-emitted-resource-metrics.yaml

@@ -0,0 +1,20 @@
+# Use this changelog template to create an entry for release notes.
+# If your change doesn't affect end users, such as a test fix or a tooling change,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: bug_fix
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: receiver/haproxy
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Make sure emitted resource metrics have distinct resources by default
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [24921]
+
+subtext: |
+  This is done by enabling and renaming the following resource attributes:
+    - proxy_name -> haproxy.proxy_name
+    - service_name -> haproxy.service_name

receiver/haproxyreceiver/documentation.md

@@ -244,8 +244,8 @@ Cumulative number of sessions. Corresponds to HAProxy's `stot` metric.
 | haproxy.algo | load balancing algorithm | Any Str | true |
 | haproxy.iid | unique proxy id | Any Str | true |
 | haproxy.pid | process id (0 for first instance, 1 for second, ...) | Any Str | true |
+| haproxy.proxy_name | Proxy name | Any Str | true |
+| haproxy.service_name | Service name (FRONTEND for frontend, BACKEND for backend, any name for server/listener) | Any Str | true |
 | haproxy.sid | server id (unique inside a proxy) | Any Str | true |
 | haproxy.type | (0=frontend, 1=backend, 2=server, 3=socket/listener) | Any Str | true |
 | haproxy.url | The path to the HAProxy socket or HTTP URL. | Any Str | true |
-| proxy_name | Proxy name | Any Str | false |
-| service_name | Service name (FRONTEND for frontend, BACKEND for backend, any name for server/listener) | Any Str | false |

receiver/haproxyreceiver/internal/metadata/testdata/config.yaml

@@ -62,16 +62,16 @@ all_set:
       enabled: true
     haproxy.pid:
       enabled: true
+    haproxy.proxy_name:
+      enabled: true
+    haproxy.service_name:
+      enabled: true
     haproxy.sid:
       enabled: true
     haproxy.type:
       enabled: true
     haproxy.url:
       enabled: true
-    proxy_name:
-      enabled: true
-    service_name:
-      enabled: true
 none_set:
   metrics:
     haproxy.bytes.input:
@@ -135,13 +135,13 @@ none_set:
       enabled: false
     haproxy.pid:
       enabled: false
+    haproxy.proxy_name:
+      enabled: false
+    haproxy.service_name:
+      enabled: false
     haproxy.sid:
       enabled: false
     haproxy.type:
       enabled: false
     haproxy.url:
       enabled: false
-    proxy_name:
-      enabled: false
-    service_name:
-      enabled: false

receiver/haproxyreceiver/metadata.yaml

@@ -37,11 +37,13 @@ resource_attributes:
     description: load balancing algorithm
     enabled: true
     type: string
-  proxy_name:
+  haproxy.proxy_name:
     description: Proxy name
+    enabled: true
     type: string
-  service_name:
+  haproxy.service_name:
     description: Service name (FRONTEND for frontend, BACKEND for backend, any name for server/listener)
+    enabled: true
     type: string
 
 attributes:

receiver/haproxyreceiver/scraper.go

@@ -223,8 +223,8 @@ func (s *scraper) scrape(ctx context.Context) (pmetric.Metrics, error) {
 			scrapeErrors = append(scrapeErrors, err)
 		}
 		rb := s.mb.NewResourceBuilder()
-		rb.SetProxyName(record["pxname"])
-		rb.SetServiceName(record["svname"])
+		rb.SetHaproxyProxyName(record["pxname"])
+		rb.SetHaproxyServiceName(record["svname"])
 		rb.SetHaproxyAddr(s.endpoint)
 		s.mb.EmitForResource(metadata.WithResource(rb.Emit()))
 	}

receiver/haproxyreceiver/scraper_test.go

@@ -51,6 +51,7 @@ func Test_scraper_readStats(t *testing.T) {
 	require.NoError(t, err)
 	require.NotNil(t, m)
 	require.Equal(t, 6, m.ResourceMetrics().Len())
+	require.NotEqual(t, m.ResourceMetrics().At(0).Resource(), m.ResourceMetrics().At(1).Resource())
 	require.Equal(t, 1, m.ResourceMetrics().At(0).ScopeMetrics().Len())
 	require.Equal(t, 10, m.ResourceMetrics().At(0).ScopeMetrics().At(0).Metrics().Len())
 	metric := m.ResourceMetrics().At(0).ScopeMetrics().At(0).Metrics().At(0)