From a1668840a740c1a689e6c0e7c6878b19b46ca28e Mon Sep 17 00:00:00 2001
From: alburthoffman <alburthoffman@gmail.com>
Date: Wed, 15 Feb 2023 14:24:17 -0800
Subject: [PATCH] support k8s.pod.hostname

---
 CHANGELOG.md                                       | 2 ++
 semantic_conventions/resource/k8s.yaml             | 5 +++++
 specification/resource/semantic_conventions/k8s.md | 1 +
 3 files changed, 8 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9a70e5f5c99..3e12c10819c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,8 @@ release.
 
 - Move X-Ray Env Variable propagation to span link instead of parent for AWS Lambda.
   ([#3166](https://github.com/open-telemetry/opentelemetry-specification/pull/3166))
+- Support pod.spec.hostname in resource k8s.pod
+  ([#3201])[https://github.com/open-telemetry/opentelemetry-specification/pull/3201]
 
 ### Compatibility
 
diff --git a/semantic_conventions/resource/k8s.yaml b/semantic_conventions/resource/k8s.yaml
index 1513f201663..2e561766c19 100644
--- a/semantic_conventions/resource/k8s.yaml
+++ b/semantic_conventions/resource/k8s.yaml
@@ -56,6 +56,11 @@ groups:
         brief: >
           The name of the Pod.
         examples: ['opentelemetry-pod-autoconf']
+      - id: hostname
+        type: string
+        brief: >
+          The hostname in the pod spec. refer to [pod.spec.hostname](https://kubernetes.io/docs/concepts/services-networking/dns-pod-service/#pod-s-hostname-and-subdomain-fields)
+        examples: ['opentelemetry-pod-autoconf']
 
   - id: k8s.container
     prefix: k8s.container
diff --git a/specification/resource/semantic_conventions/k8s.md b/specification/resource/semantic_conventions/k8s.md
index 2b2387c54c6..0359b9160f3 100644
--- a/specification/resource/semantic_conventions/k8s.md
+++ b/specification/resource/semantic_conventions/k8s.md
@@ -69,6 +69,7 @@ containers on your cluster.
 |---|---|---|---|---|
 | `k8s.pod.uid` | string | The UID of the Pod. | `275ecb36-5aa8-4c2a-9c47-d8bb681b9aff` | Recommended |
 | `k8s.pod.name` | string | The name of the Pod. | `opentelemetry-pod-autoconf` | Recommended |
+| `k8s.pod.hostname` | string | The hostname in the pod spec. refer to [pod.spec.hostname](https://kubernetes.io/docs/concepts/services-networking/dns-pod-service/#pod-s-hostname-and-subdomain-fields) | `opentelemetry-pod-autoconf` | Recommended |
 <!-- endsemconv -->
 
 ## Container