E2E: metrics-agent tests

Makefile

@@ -215,6 +215,7 @@ E2E_TARGETS = e2e-dir \
 	installer/liqoctl/peer \
 	e2e/postinstall \
 	e2e/cruise \
+	metrics \
 	installer/liqoctl/unpeer \
 	installer/liqoctl/uninstall \
 	e2e/postuninstall
@@ -254,5 +255,9 @@ installer/%:
 telemetry:
 	${PWD}/test/e2e/pipeline/telemetry/telemetry.sh
 
+metrics:
+	chmod +x ${PWD}/test/e2e/pipeline/metrics/metrics.sh
+	${PWD}/test/e2e/pipeline/metrics/metrics.sh
+
 e2e/%:
 	go test ${PWD}/test/$@/... -count=1 -timeout=20m

test/e2e/pipeline/infra/cluster-api/setup.sh

@@ -93,6 +93,10 @@ do
   # install local-path storage class
   "${KUBECTL}" apply -f https://raw.githubusercontent.com/rancher/local-path-provisioner/v0.0.24/deploy/local-path-storage.yaml --kubeconfig "${TMPDIR}/kubeconfigs/liqo_kubeconf_${i}"
   "${KUBECTL}" annotate storageclass local-path storageclass.kubernetes.io/is-default-class=true --kubeconfig "${TMPDIR}/kubeconfigs/liqo_kubeconf_${i}"
+
+  # Install metrics-server
+  "${KUBECTL}" apply -f https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.6.4/components.yaml
+  "${KUBECTL}" -n kube-system patch deployment metrics-server --type json --patch '[{"op":"add","path":"/spec/template/spec/containers/0/args/-","value":"--kubelet-insecure-tls"}]'
 done
 
 for i in $(seq 1 "${CLUSTER_NUMBER}");

test/e2e/pipeline/metrics/metrics.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+#shellcheck disable=SC1091
+
+# 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
+# TMPDIR                -> the directory where kubeconfigs are stored
+
+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
+
+FILEPATH=$(realpath "$0")
+WORKDIR=$(dirname "$FILEPATH")
+
+# shellcheck source=../utils.sh
+source "$WORKDIR/../utils.sh"
+
+for i in $(seq 1 "${CLUSTER_NUMBER}")
+do
+  export KUBECONFIG="${TMPDIR}/kubeconfigs/liqo_kubeconf_${i}"
+  if ! waitandretry 5s 12 "$KUBECTL top node liqo-${i}";
+  then
+      echo "Failed to get metrics from cluster ${i}"
+      exit 1
+  fi
+done