Merge pull request #171 from AkihiroSuda/coredns

hack: add CoreDNS smoketest

hack/smoketest-binaries.sh

@@ -35,3 +35,5 @@ if ! timeout 60 kubectl run --rm -i --image busybox --restart=Never hello echo h
 	journalctl -xe --no-pager
 	exit 1
 fi
+
+smoketest_dns

hack/smoketest-common.inc.sh

@@ -8,3 +8,65 @@ function INFO() {
 function ERROR() {
 	echo >&2 -e "\e[101m\e[97m[ERROR]\e[49m\e[39m $@"
 }
+
+function smoketest_dns() {
+	INFO "Installing CoreDNS"
+	kubectl apply -f manifests/coredns.yaml
+
+	INFO "Creating StatefulSet \"dnstest\" and headless Service \"dnstest\""
+	kubectl apply -f - <<EOF
+apiVersion: v1
+kind: Service
+metadata:
+  name: dnstest
+  labels:
+    run: dnstest
+spec:
+  type: ClusterIP
+  clusterIP: None
+  ports:
+  - name: "http"
+    protocol: "TCP"
+    port: 80
+    targetPort: 80
+  selector:
+    run: dnstest
+---
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: dnstest
+spec:
+  serviceName: dnstest
+  selector:
+    matchLabels:
+      run: dnstest
+  replicas: 3
+  template:
+    metadata:
+      labels:
+        run: dnstest
+    spec:
+      containers:
+      - name: dnstest
+        image: nginx:alpine
+        ports:
+        - containerPort: 80
+EOF
+	INFO "Waiting for 3 replicas to be ready"
+	if ! timeout 90 sh -exc "until [ \$(kubectl get pods --field-selector status.phase=Running -l run=dnstest -o name | wc -l) = "3" ]; do sleep 10; done"; then
+		ERROR "Pods are not ready."
+		set -x
+		kubectl get pods -o wide
+		kubectl get pods -o yaml
+		exit 1
+	fi
+
+	INFO "Connecting to dnstest-{0,1,2}.dnstest.default.svc.cluster.local"
+	kubectl run -it --rm --image=alpine --restart=Never dnstest-shell -- sh -exc 'for f in $(seq 0 2); do wget -O- http://dnstest-${f}.dnstest.default.svc.cluster.local; done'
+
+	INFO "Deleting Service \"dnstest\""
+	kubectl delete service dnstest
+	INFO "Deleting StatefulSet \"dnstest\""
+	kubectl delete statefulset dnstest
+}

hack/smoketest-docker-compose.sh

@@ -77,4 +77,6 @@ for ip in $(kubectl get pods -o json -l app=$app | jq -r ".items[].status.podIP"
 	kubectl exec shell -- wget -O- $ip
 done
 
+smoketest_dns
+
 INFO "PASS"

hack/smoketest-docker.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 set -eu -o pipefail
+source $(realpath $(dirname $0))/smoketest-common.inc.sh
 if [[ $# -lt 3 ]]; then
 	echo "Usage: $0 NAME IMAGE ARGS"
 	exit 1
@@ -40,3 +41,5 @@ if ! timeout 60 time kubectl run --rm -i --image busybox --restart=Never hello e
 	docker logs $container
 	exit 1
 fi
+
+smoketest_dns