Allow to set the namespace in the three data hall example (#1892)

Author: johscheuer

config/tests/three_data_hall/Readme.md

@@ -3,6 +3,7 @@
 This example requires that your Kubernetes cluster has nodes which are labeled with `topology.kubernetes.io/zone`.
 The example requires at least 3 unique zones, those can be faked for testing, by adding the labels to a node.
 If you want to use cloud provider specific zone label values you can set the `AZ1`, `AZ2` and `AZ3` environment variables.
+You can also set the namespace with the `NAMESPACE` environment variable to deploy this setup in a specific namespace.
 
 ## Create the Three-Data-Hall cluster
 

config/tests/three_data_hall/create.bash

@@ -20,6 +20,7 @@ DIR="${BASH_SOURCE%/*}"
 AZ1=${AZ1:-"az1"}
 AZ2=${AZ2:-"az2"}
 AZ3=${AZ3:-"az3"}
+NAMESPACE=${NAMESPACE=-"default"}
 
 applyFile "${DIR}/stage_1.yaml" "${AZ1}" '""'
 checkReconciliationLoop test-cluster-${AZ1}

config/tests/three_data_hall/delete.bash

@@ -2,4 +2,4 @@
 
 set -eu
 
-kubectl delete fdb -l cluster-group=test-cluster
+kubectl -n "${NAMESPACE}" delete fdb -l cluster-group=test-cluster

config/tests/three_data_hall/functions.bash

@@ -1,13 +1,13 @@
 function applyFile() {
 	az=${2}
 
-	az="${az}" connectionString="${3}" envsubst < "${1}"| kubectl apply -f -
+	az="${az}" connectionString="${3}" envsubst < "${1}"| kubectl -n "${NAMESPACE}" apply -f -
 }
 
 function checkReconciliation() {
 	clusterName=$1
 
-	generationsOutput=$(kubectl get fdb "${clusterName}" -o jsonpath='{.metadata.generation} {.status.generations.reconciled}')
+	generationsOutput=$(kubectl -n "${NAMESPACE}" get fdb "${clusterName}" -o jsonpath='{.metadata.generation} {.status.generations.reconciled}')
 	read -ra generations <<< "${generationsOutput}"
 	if [[ ("${#generations[@]}" -ge 2) && ("${generations[0]}" == "${generations[1]}") ]]; then
 		return 1
@@ -18,7 +18,7 @@ function checkReconciliation() {
 }
 
 function getConnectionString() {
-	kubectl get fdb "${1}" -o jsonpath='{.status.connectionString}'
+	kubectl -n "${NAMESPACE}" get fdb "${1}" -o jsonpath='{.status.connectionString}'
 }
 
 function checkReconciliationLoop() {