Add semantic conventions for all Kubernetes objects

Signed-off-by: Bogdan Drutu <bogdandrutu@gmail.com>

specification/resource/semantic_conventions/k8s.md

@@ -1,12 +1,134 @@
 # Kubernetes
 
-**type:** `k8s`
+Useful resources to understand Kubernetes objects and metadata:
 
-**Description:** A Kubernetes resource.
+* [Namespace](https://kubernetes.io/docs/concepts/overview/working-with-objects/namespaces/)
+* [Names and UIDs](https://kubernetes.io/docs/concepts/overview/working-with-objects/names/).
+* [Pods](https://kubernetes.io/docs/concepts/workloads/pods/)
+* [Controllers](https://kubernetes.io/docs/concepts/workloads/controllers/)
+
+The "name" of a Kubernetes resource is unique for that type of resource within a
+"namespace" and only at a specific moment of time (names can be reusedover
+time). The "uid" is unique across your whole cluster, and very likely across
+time. Because of this it is recommended to always set the UID for every
+Kubernetes resource, but "name" is usually more user friendly.
+
+## Cluster
+
+**type:** `k8s.cluster`
+
+**Description:** A Kubernetes Cluster.
+
+| Attribute  | Description  | Example  |
+|---|---|---|
+| k8s.cluster.name | The name of the cluster. | `opentelemetry-cluster` |
+
+## Namespace
+
+Namespaces provide a scope for names. Names of resources need to be unique
+within a namespace, but not across namespaces.
+
+**type:** `k8s.namespace`
+
+**Description:** A Kubernetes Namespace.
 
 | Attribute  | Description  | Example  |
 |---|---|---|
-| k8s.cluster.name | The name of the cluster that the pod is running in. | `opentelemetry-cluster` |
 | k8s.namespace.name | The name of the namespace that the pod is running in. | `default` |
-| k8s.pod.name | The name of the pod. | `opentelemetry-pod-autoconf` |
-| k8s.deployment.name | The name of the deployment. | `opentelemetry` |
+
+## Pod
+
+The smallest and simplest Kubernetes object. A Pod represents a set of running
+containers on your cluster.
+
+**type:** `k8s.pod`
+
+**Description:** A Kubernetes Pod resource.
+
+| Attribute  | Description  | Example  |
+|---|---|---|
+| k8s.pod.uid | The uid of the Pod. | `275ecb36-5aa8-4c2a-9c47-d8bb681b9aff` |
+| k8s.pod.name | The name of the Pod. | `opentelemetry-pod-autoconf` |
+
+## ReplicaSet
+
+A ReplicaSet’s purpose is to maintain a stable set of replica Pods running at
+any given time.
+
+**type:** `k8s.replica_set`
+
+**Description:** A Kubernetes ReplicaSet resource.
+
+| Attribute  | Description  | Example  |
+|---|---|---|
+| k8s.replica_set.uid | The uid of the ReplicaSet. | `275ecb36-5aa8-4c2a-9c47-d8bb681b9aff` |
+| k8s.replica_set.name | The name of the ReplicaSet. | `opentelemetry` |
+
+## Deployment
+
+An API object that manages a replicated application, typically by running Pods
+with no local state. Each replica is represented by a Pod, and the Pods are
+distributed among the nodes of a cluster.
+
+**type:** `k8s.deployment`
+
+**Description:** A Kubernetes Deployment resource.
+
+| Attribute  | Description  | Example  |
+|---|---|---|
+| k8s.deployment.uid | The uid of the Deployment. | `275ecb36-5aa8-4c2a-9c47-d8bb681b9aff` |
+| k8s.deployment.name | The name of the Deployment. | `opentelemetry` |
+
+## StatefulSet
+
+Manages the deployment and scaling of a set of Pods, and provides guarantees
+about the ordering and uniqueness of these Pods.
+
+**type:** `k8s.stateful_set`
+
+**Description:** A Kubernetes Deployment resource.
+
+| Attribute  | Description  | Example  |
+|---|---|---|
+| k8s.stateful_set.uid | The uid of the deployment. | `275ecb36-5aa8-4c2a-9c47-d8bb681b9aff` |
+| k8s.stateful_set.name | The name of the deployment. | `opentelemetry` |
+
+## DaemonSet
+
+A DaemonSet ensures that all (or some) Nodes run a copy of a Pod.
+
+**type:** `k8s.daemon_set`
+
+**Description:** A Kubernetes Deployment resource.
+
+| Attribute  | Description  | Example  |
+|---|---|---|
+| k8s.daemon_set.uid | The uid of the DaemonSet. | `275ecb36-5aa8-4c2a-9c47-d8bb681b9aff` |
+| k8s.daemon_set.name | The name of the DaemonSet. | `opentelemetry` |
+
+## Job
+
+A Job creates one or more Pods and ensures that a specified number of them
+successfully terminate.
+
+**type:** `k8s.job`
+
+**Description:** A Kubernetes Deployment resource.
+
+| Attribute  | Description  | Example  |
+|---|---|---|
+| k8s.job.uid | The uid of the Job. | `275ecb36-5aa8-4c2a-9c47-d8bb681b9aff` |
+| k8s.job.name | The name of the Job. | `opentelemetry` |
+
+## CronJob
+
+A CronJob creates Jobs on a repeating schedule.
+
+**type:** `k8s.cron_job`
+
+**Description:** A Kubernetes Deployment resource.
+
+| Attribute  | Description  | Example  |
+|---|---|---|
+| k8s.cron_job.uid | The uid of the CronJob. | `275ecb36-5aa8-4c2a-9c47-d8bb681b9aff` |
+| k8s.cron_job.name | The name of the CronJob. | `opentelemetry` |