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+# Container Groups
+
+In a traditional AWX installation, jobs (ansible-playbook runs) are executed
+either directly on a member of the cluster or on a pre-provisioned "isolated"
+node. 
+
+The concept of a Container Group (working name) allows for job environments to
+be provisioned on-demand as a Pod that exists only for the duration of the
+playbook run. This is known as the ephemeral execution model and ensures a clean
+environment for every job run. 
+
+In some cases it is desireable to have the execution environment be "always-on",
+this is is done by manually creating an instance through the AWX API or UI. 
+
+
+## Configuration
+
+A `ContainerGroup` is simply an `InstanceGroup` that has an associated Credential
+that allows for connecting to an OpenShift or Kubernetes cluster.
+
+To create a new type, add a new `ManagedCredentialType` to
+`awx/main/models/credential/__init__.py` where `kind='kubernetes'`.
+
+### Create Credential
+
+A `Credential` must be created where the associated `CredentialType` is one of:
+
+- `openshift_username_password`
+- `openshift_token`
+- `kubernetes_bearer_token`
+
+### Create a Container Groupp
+
+Once this `Credential` has been associated with an `InstanceGroup`, the
+`InstanceGroup.kubernetes` property will return `True`.
+
+#### Pod Customization
+
+There will be a very simple default pod spec that lives in code.
+
+A custom YAML document may be provided which will be merged on top of the
+default pod spec.
+
+This will allow the UI to implement whatever fields necessary, because
+any custom fields (think 'image' or 'namespace') can be "serialized" as valid
+`Pod` JSON or YAML. A full list of options can be found in the Kubernetes
+documentation
+[here](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.15/#pod-v1-core).
+
+```bash
+cat > api_request.json <<EOF
+{
+  "pod_spec_override": "spec:\n  containers:\n    - image: my-custom-image"
+}
+EOF
+
+curl -Lk --user 'admin:password' \
+     -X PATCH \
+     -d @api_request.json \
+     -H 'Content-Type: application/json' \
+     https://localhost:8043/api/v2/instance_groups/2/
+```