test: E2E test script (#51)

tests/e2e/e2e-tests.sh

@@ -0,0 +1,143 @@
+#!/usr/bin/env bash
+
+# Test cluster
+CLUSTER_NAME=""
+K8S_VERSION=""
+
+# New Relic account (production) details
+LICENSE_KEY=""
+
+# Unset if you only want to setup a test cluster with E2E specifications
+# Set to true if you additionally want to run tests
+RUN_TESTS=""
+
+function main() {
+    parse_args "$@"
+    create_cluster
+    if [[ "$RUN_TESTS" == "true" ]]; then
+        run_tests
+        teardown
+    fi
+}
+
+function parse_args() {
+    totalArgs=$#
+
+    # Arguments are passed by value, so other functions
+    # are not affected by destructive processing
+    while [[ $# -gt 0 ]]; do
+        case $1 in
+            --help)
+            help
+            exit 0
+            ;;
+            --k8s_version)
+            shift
+            K8S_VERSION="$1"
+            ;;
+            --license_key)
+            shift
+            LICENSE_KEY="$1"
+            ;;
+            --run_tests)
+            RUN_TESTS="true"
+            ;;
+            -*|--*|*)
+            echo "Unknown field: $1"
+            exit 1
+            ;;
+        esac
+        shift
+    done
+
+    if [[ totalArgs -lt 4 ]]; then
+        help
+        exit 0
+    fi
+}
+
+function help() {
+    cat <<END
+ Usage:
+ ${0##*/}    --k8s_version <cluster_version>
+             --license_key <license_key>
+             [--run_tests]
+
+ --k8s_version:  valid Kubernetes cluster version. It is highly recommended to use same versions as E2E tests
+ --license_key:  key type 'INGEST - LICENSE'
+ --run_tests:    if unset, create a cluster with specifications matching E2E tests
+                 otherwise run tests in addition to setting up cluster
+END
+}
+
+function create_cluster() {
+    echo "🔄 Setup"
+    minikube delete --all > /dev/null
+    now=$( date "+%Y-%m-%d-%H-%M-%S" )
+    CLUSTER_NAME=${now}-e2e-tests
+
+    echo "🔄 Creating cluster ${CLUSTER_NAME}"
+    minikube start --container-runtime=containerd --kubernetes-version=v${K8S_VERSION} --profile ${CLUSTER_NAME} > /dev/null
+
+    echo "🔄 Building Docker image"
+    cd ../..
+    export DOCKER_BUILDKIT=1
+    docker build --tag e2e/k8s-agents-operator:e2e  . --quiet > /dev/null
+    cd tests/e2e
+
+    echo "🔄 Loading image into cluster"
+    minikube image load e2e/k8s-agents-operator:e2e --profile ${CLUSTER_NAME} > /dev/null
+
+    echo "🔄 Adding Helm repositories"
+    helm repo add jetstack https://charts.jetstack.io
+    helm repo update > /dev/null
+
+    echo "🔄 Installing cert-manager"
+    helm install cert-manager jetstack/cert-manager \
+      --namespace cert-manager \
+      --create-namespace \
+      --set crds.enabled=true
+
+    echo "🔄 Installing operator"
+    helm upgrade --install k8s-agents-operator ../../charts/k8s-agents-operator \
+      --namespace k8s-agents-operator \
+      --create-namespace \
+      --values e2e-values.yml \
+      --set licenseKey=${LICENSE_KEY}
+
+    echo "🔄 Waiting for operator to settle"
+    sleep 30
+
+    echo "🔄 Creating E2E namespace"
+    kubectl create namespace e2e-namespace
+
+    echo "🔄 Installing secret"
+    kubectl create secret generic newrelic-key-secret \
+      --namespace e2e-namespace \
+      --from-literal=new_relic_license_key=${LICENSE_KEY}
+
+    echo "🔄 Installing instrumentation"
+    kubectl apply --namespace e2e-namespace --filename e2e-instrumentation.yml
+
+    echo "🔄 Installing apps"
+    kubectl apply --namespace e2e-namespace --filename apps/
+}
+
+function run_tests() {
+    echo "🔄 Waiting for apps to settle"
+    sleep 60
+
+    echo "🔄 Starting E2E tests"
+    initContainers=$(kubectl get pods --namespace e2e-namespace --output yaml | yq '.items[].spec.initContainers[].name' | wc -l)
+    if [[ ${initContainers} -lt 4 ]]; then
+      echo "Error: not all apps were instrumented. Expected 4, got ${initContainers}"
+      exit 1
+    fi
+}
+
+function teardown() {
+    echo "🔄 Teardown"
+    minikube delete --all > /dev/null
+}
+
+main "$@"