Add support for aws.config provider secret

This change adds support for injecting a aws configuration into
the nodepool processes.

Change-Id: I9ac4030c9c945016b467a7e876d6be33a5c56065

Author: TristanCacqueray

controllers/nodepool.go

@@ -252,6 +252,15 @@ func (r *SFController) setProviderSecretsVolumeMounts() ([]apiv1.VolumeMount, ap
 				ReadOnly:  true,
 			})
 		}
+
+		if data, ok := nodepoolProvidersSecrets.Data["aws.config"]; ok && len(data) > 0 {
+			volumeMount = append(volumeMount, apiv1.VolumeMount{
+				Name:      "nodepool-providers-secrets",
+				SubPath:   "aws.config",
+				MountPath: "/var/lib/nodepool/.aws/config",
+				ReadOnly:  true,
+			})
+		}
 	}
 	return volumeMount, nodepoolProvidersSecrets, exists
 }

docs/deployment/nodepool.md

@@ -39,11 +39,15 @@ The spec is constantly evolving during alpha development and should be considere
 
 ## Setting up providers secrets
 
-Currently the SF Operator supports OpenStack (`clouds.yaml`) and Kubernetes (`kube.config`) configuration files. These files are used by Nodepool to manage resources on its providers.
+Currently the SF Operator supports OpenStack (`clouds.yaml`), Kubernetes (`kube.config`) and AWS (`aws.config`) configuration files. These files are used by Nodepool to manage resources on its providers.
 They are managed by the SF Operator in a secret called `nodepool-providers-secrets`.
 
 ```sh
-kubectl create secret generic nodepool-providers-secrets --from-file=clouds.yaml=<path-to>/clouds.yaml --from-file=kube.config=<path-to>/kube.config --dry-run=client -o yaml | kubectl apply -f -
+kubectl create secret generic nodepool-providers-secrets \
+  --from-file=clouds.yaml=<path-to>/clouds.yaml          \
+  --from-file=kube.config=<path-to>/kube.config          \
+  --from-file=aws.config=<path-to>/aws.config            \
+  --dry-run=client -o yaml | kubectl apply -f -
 ```
 
 Then wait until your deployment becomes ready again:

docs/reference/CHANGELOG.md

@@ -7,6 +7,7 @@ All notable changes to this project will be documented in this file.
 ### Added
 
 - Improved logserver SSH key rotation: refactored authorized_keys reconciliation logic and added `logserver-uploader-spare-keys` secret support to allow long-running jobs to maintain access during key rotation without service interruption.
+- Support for aws.config key in nodepool-providers-secrets.
 
 ### Changed