Auto-detect AWS Region from Config

Signed-off-by: Connor Catlett <[email protected]>

Author: ConnorJC3

hack/e2e/config.sh

@@ -22,8 +22,11 @@ mkdir -p "${TEST_DIR}"
 CLUSTER_FILE=${TEST_DIR}/${CLUSTER_NAME}.${CLUSTER_TYPE}.yaml
 KUBECONFIG=${KUBECONFIG:-"${TEST_DIR}/${CLUSTER_NAME}.${CLUSTER_TYPE}.kubeconfig"}
 
-export AWS_REGION=${AWS_REGION:-us-west-2}
-ZONES=${AWS_AVAILABILITY_ZONES:-us-west-2a,us-west-2b,us-west-2c}
+# Use AWS_REGION as priority, fallback to region from awscli config, fallback to us-west-2
+REGION_FROM_CONFIG="$(aws configure get region)"
+export AWS_REGION=${AWS_REGION:-${REGION_FROM_CONFIG:-us-west-2}}
+# If zones are not provided, auto-detect the first 3 AZs that are not opt in
+ZONES=${AWS_AVAILABILITY_ZONES:-$(aws ec2 describe-availability-zones | jq -r '[.AvailabilityZones[] | select(.OptInStatus == "opt-in-not-required") | .ZoneName][:3] | join(",")')}
 FIRST_ZONE=$(echo "${ZONES}" | cut -d, -f1)
 NODE_COUNT=${NODE_COUNT:-3}
 INSTANCE_TYPE=${INSTANCE_TYPE:-c5.large}