Telemetry: E2E tests + VirtualNode scheme

Makefile

@@ -200,6 +200,7 @@ E2E_TARGETS = e2e-dir \
 	ctl \
 	e2e-infra \
 	installer/liqoctl/setup \
+	telemetry \
 	installer/liqoctl/peer \
 	e2e/postinstall \
 	e2e/cruise \
@@ -239,5 +240,8 @@ e2e-infra:
 installer/%:
 	${PWD}/test/e2e/pipeline/$@.sh
 
+telemetry:
+	${PWD}/test/e2e/pipeline/telemetry/telemetry.sh
+
 e2e/%:
 	go test ${PWD}/test/$@/... -count=1 -timeout=20m

cmd/telemetry/main.go

@@ -17,6 +17,7 @@ package main
 import (
 	"context"
 	"flag"
+	"fmt"
 	"os"
 	"os/signal"
 	"syscall"
@@ -30,12 +31,14 @@ import (
 	"sigs.k8s.io/controller-runtime/pkg/log"
 
 	discoveryv1alpha1 "github.com/liqotech/liqo/apis/discovery/v1alpha1"
-	netv1alpha1 "github.com/liqotech/liqo/apis/net/v1alpha1"
+	virtualkubeletv1alpha1 "github.com/liqotech/liqo/apis/net/v1alpha1"
 	offloadingv1alpha1 "github.com/liqotech/liqo/apis/offloading/v1alpha1"
 	sharingv1alpha1 "github.com/liqotech/liqo/apis/sharing/v1alpha1"
+	netv1alpha1 "github.com/liqotech/liqo/apis/virtualkubelet/v1alpha1"
 	"github.com/liqotech/liqo/pkg/consts"
 	"github.com/liqotech/liqo/pkg/telemetry"
 	argsutils "github.com/liqotech/liqo/pkg/utils/args"
+	"github.com/liqotech/liqo/pkg/utils/json"
 	"github.com/liqotech/liqo/pkg/utils/mapper"
 	"github.com/liqotech/liqo/pkg/utils/restcfg"
 )
@@ -48,6 +51,7 @@ func init() {
 	_ = offloadingv1alpha1.AddToScheme(scheme)
 	_ = sharingv1alpha1.AddToScheme(scheme)
 	_ = netv1alpha1.AddToScheme(scheme)
+	_ = virtualkubeletv1alpha1.AddToScheme(scheme)
 }
 
 // cluster-role
@@ -65,6 +69,7 @@ func main() {
 	namespace := flag.String("namespace", "liqo", "the namespace where liqo is deployed")
 	liqoVersion := flag.String("liqo-version", "", "the liqo version")
 	kubernetesVersion := flag.String("kubernetes-version", "", "the kubernetes version")
+	dryRun := flag.Bool("dry-run", false, "if true, do not send the telemetry item and print it on stdout")
 	flag.Var(&clusterLabels, consts.ClusterLabelsParameter,
 		"The set of labels which characterizes the local cluster when exposed remotely as a virtual node")
 
@@ -104,6 +109,11 @@ func main() {
 		os.Exit(1)
 	}
 
+	if *dryRun {
+		klog.Infof("dry-run enabled, telemetry item:")
+		fmt.Println(json.Pretty(telemetryItem))
+		return
+	}
 	err = telemetry.Send(ctx, *telemetryEndpoint, telemetryItem, *timeout)
 	if err != nil {
 		klog.Errorf("failed to send telemetry item: %v", err)

pkg/utils/json/doc.go

@@ -0,0 +1,16 @@
+// Copyright 2019-2023 The Liqo Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package json contains some utilities to work with JSON.
+package json

pkg/utils/json/json.go

@@ -0,0 +1,26 @@
+// Copyright 2019-2023 The Liqo Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package json
+
+import "encoding/json"
+
+// Pretty returns an indented JSON string to print.
+func Pretty(data interface{}) (string, error) {
+	val, err := json.MarshalIndent(data, "", "    ")
+	if err != nil {
+		return "", err
+	}
+	return string(val), nil
+}

test/e2e/pipeline/telemetry/telemetry.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+# This scripts expects the following variables to be set:
+# CLUSTER_NUMBER        -> the number of liqo clusters
+# NAMESPACE             -> the namespace where liqo is running
+# LIQO_VERSION          -> the liqo version to test
+# K8S_VERSION           -> the Kubernetes version
+
+set -e           # Fail in case of error
+set -o nounset   # Fail if undefined variables are used
+set -o pipefail  # Fail if one of the piped commands fails
+
+error() {
+   local sourcefile=$1
+   local lineno=$2
+   echo "An error occurred at $sourcefile:$lineno."
+}
+trap 'error "${BASH_SOURCE}" "${LINENO}"' ERR
+
+for i in $(seq 1 "${CLUSTER_NUMBER}")
+do
+  export KUBECONFIG="${TMPDIR2}/kubeconfigs/liqo_kubeconf_${i}"
+  go run ./cmd/telemetry/main.go --liqo-version "${LIQO_VERSION}" --kubernetes-version "${K8S_VERSION}" --dry-run
+done