Merge pull request #38 from arangodb/prepare-cluster-for-test

Prepare test cluster

Makefile

@@ -200,6 +200,7 @@ endif
 	kubectl create namespace $(TESTNAMESPACE)
 	$(ROOTDIR)/examples/setup-rbac.sh --namespace=$(TESTNAMESPACE)
 	$(ROOTDIR)/scripts/kube_create_operator.sh $(TESTNAMESPACE) $(OPERATORIMAGE)
+	$(ROOTDIR)/scripts/kube_create_storage.sh $(TESTNAMESPACE)
 	kubectl --namespace $(TESTNAMESPACE) \
 		run arangodb-operator-test -i --rm --quiet --restart=Never \
 		--image=$(TESTIMAGE) \

docs/design/test_clusters.md

@@ -0,0 +1,16 @@
+# Test clusters
+
+The ArangoDB operator is tested on various types of kubernetes clusters.
+
+To prepare a cluster for running the ArangoDB operator tests,
+do the following:
+
+- Create a `kubectl` config file for accessing the cluster.
+- Use that config file.
+- Run `./scripts/kube_configure_test_cluster.sh`. This creates a `ConfigMap`
+  named `arango-operator-test` in the `kube-system` namespace containing the
+  following environment variables.
+
+```bash
+REQUIRE_LOCAL_STORAGE=1
+```

scripts/kube_configure_test_cluster.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+# Sets the configuration of the cluster in a ConfigMap in kube-system.
+
+cluster=$(kubectl config current-context)
+echo "Configuring cluster $cluster"
+
+read -p "Does the cluster require local storage (Y/n)? " answer
+case ${answer:0:1} in
+    n|N )
+        REQUIRE_LOCAL_STORAGE=
+    ;;
+    * )
+        REQUIRE_LOCAL_STORAGE=1
+    ;;
+esac
+
+mapname="arango-operator-test"
+configfile=$(mktemp)
+cat <<EOF > $configfile
+REQUIRE_LOCAL_STORAGE=${REQUIRE_LOCAL_STORAGE}
+EOF
+kubectl delete configmap $mapname -n kube-system --ignore-not-found 
+kubectl create configmap $mapname -n kube-system --from-env-file=$configfile || exit 1
+
+echo Stored configuration:
+cat $configfile
+rm $configfile

scripts/kube_create_operator.sh

@@ -19,7 +19,7 @@ if [ ! -z $USESHA256 ]; then
   IMAGE=$(docker inspect --format='{{index .RepoDigests 0}}' ${IMAGE})
 fi
 
-kubectl --namespace=$NS create -f - << EOYAML
+config=$(cat << EOYAML
 apiVersion: extensions/v1beta1
 kind: Deployment
 metadata:
@@ -46,5 +46,27 @@ spec:
               fieldPath: metadata.name
 
 EOYAML
+)
+echo "$config" | kubectl --namespace=$NS create -f - || exit 1
 
-exit $?
+# Wait until custom resources are available
+
+while :; do
+  response=$(kubectl get crd arangodeployments.database.arangodb.com --template="non-empty" --ignore-not-found)
+  if [ ! -z $response ]; then
+    break
+  fi
+  sleep 1
+  echo -n .
+done
+
+while :; do
+  response=$(kubectl get crd arangolocalstorages.storage.arangodb.com --template="non-empty" --ignore-not-found)
+  if [ ! -z $response ]; then
+    break
+  fi
+  sleep 1
+  echo -n .
+done
+
+echo "Arango Operator deployed"

scripts/kube_create_storage.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+# Create the local storage in the cluster if the cluster needs it.
+
+NS=$1
+
+if [ -z $NS ]; then
+    echo "Specify a namespace argument"
+    exit 1
+fi
+
+# Fetch cluster config
+mapname="arango-operator-test"
+eval $(kubectl get configmap $mapname -n kube-system --ignore-not-found --template='{{ range $key, $value := .data }}export {{$key}}={{$value}}
+{{ end }}')
+
+if [ "${REQUIRE_LOCAL_STORAGE}" = "1" ]; then
+  echo "Preparing local storage"
+  kubectl apply -n $NS -f examples/arango-local-storage.yaml || exit 1
+else
+  echo "No local storage needed for this cluster"
+fi

scripts/kube_delete_namespace.sh

@@ -10,8 +10,12 @@ if [ -z $NS ]; then
 fi
 
 kubectl delete namespace $NS --now --ignore-not-found
-response=$(kubectl get namespace $NS --template="non-empty" --ignore-not-found)
-while [ ! -z $response ]; do
-    sleep 1
-    response=$(kubectl get namespace $NS --template="non-empty" --ignore-not-found)
+
+# Wait until its really gone
+while :; do
+  response=$(kubectl get namespace $NS --template="non-empty" --ignore-not-found)
+  if [ -z $response ]; then
+    break
+  fi
+  sleep 0.5
 done