run an integration test script against minikube

Makefile

@@ -21,10 +21,18 @@ test:
 	go test -v ${PKGS} -cover -race -p=1
 .PHONY: test
 
+integration:
+	bash test/integration/run.sh
+.PHONY: integration
+
 cross:
 	gox -os '!freebsd !netbsd' -arch '!arm' -output "dist/{{.Dir}}_{{.OS}}_{{.Arch}}" -ldflags '-X main.Version=${TAG}' ${TARGETS}
 .PHONY: cross
 
+clean:
+	rm dist/helmfile_*
+.PHONY: clean
+
 pristine: generate fmt
 	git ls-files --exclude-standard --modified --deleted --others | diff /dev/null -
 .PHONY: pristine

test/integration/charts/httpbin/.helmignore

@@ -0,0 +1,21 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj

test/integration/charts/httpbin/Chart.yaml

@@ -0,0 +1,5 @@
+apiVersion: v1
+description: HTTP Request & Response Service, written in Python + Flask. https://httpbin.org
+name: httpbin
+version: 0.1.0
+

test/integration/charts/httpbin/templates/_helpers.tpl

@@ -0,0 +1,16 @@
+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "httpbin.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+*/}}
+{{- define "httpbin.fullname" -}}
+{{- $name := default .Chart.Name .Values.nameOverride -}}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}

test/integration/charts/httpbin/templates/deployment.yaml

@@ -0,0 +1,38 @@
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+metadata:
+  name: {{ template "httpbin.fullname" . }}
+  labels:
+    app: {{ template "httpbin.name" . }}
+    chart: {{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}  
+spec:
+  replicas: 1
+  strategy: {}
+  template:
+    metadata:
+      labels:
+        app: {{ template "httpbin.name" . }}
+        release: {{ .Release.Name }}
+    spec:
+      containers:
+      - name: {{ .Chart.Name }}
+        image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+        imagePullPolicy: {{ .Values.image.pullPolicy }}
+        livenessProbe:
+          httpGet:
+            path: /
+            port: {{ .Values.service.internalPort }}
+        readinessProbe:
+          httpGet:
+            path: /
+            port: {{ .Values.service.internalPort }}        
+        ports:
+          - containerPort: {{ .Values.service.internalPort }}
+        resources:
+{{ toYaml .Values.resources | indent 10 }}
+
+status: {}
+---

test/integration/charts/httpbin/templates/ingress.yaml

@@ -0,0 +1,33 @@
+{{- if .Values.ingress.enabled -}}
+{{- $serviceName := include "httpbin.fullname" . -}}
+{{- $servicePort := .Values.service.externalPort -}}
+{{- $prefix := .Values.ingress.prefix -}}
+apiVersion: extensions/v1beta1
+kind: Ingress
+metadata:
+  name: {{ template "httpbin.fullname" . }}
+  labels:
+    app: {{ template "httpbin.name" . }}
+    chart: {{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+  annotations:
+    {{- range $key, $value := .Values.ingress.annotations }}
+      {{ $key }}: {{ $value | quote }}
+    {{- end }}
+spec:
+  rules:
+    {{- range $host := .Values.ingress.hosts }}
+    - host: {{ $host }}
+      http:
+        paths:
+          - path: /
+            backend:
+              serviceName: {{ $serviceName }}
+              servicePort: {{ $servicePort }}
+    {{- end -}}
+  {{- if .Values.ingress.tls }}
+  tls:
+{{ toYaml .Values.ingress.tls | indent 4 }}
+  {{- end -}}
+{{- end -}}

test/integration/charts/httpbin/templates/service.yaml

@@ -0,0 +1,19 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ template "httpbin.fullname" . }}
+  labels:
+    app: {{ template "httpbin.name" . }}
+    chart: {{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+    - port: {{ .Values.service.externalPort }}
+      targetPort: {{ .Values.service.internalPort }}
+      protocol: TCP
+      name: {{ .Values.service.name }}
+  selector:
+    app: {{ template "httpbin.name" . }}
+    release: {{ .Release.Name }}

test/integration/charts/httpbin/values.yaml

@@ -0,0 +1,14 @@
+image:
+  repository: docker.io/citizenstig/httpbin
+  tag: latest
+  pullPolicy: IfNotPresent
+service:
+  name: httpbin
+  type: LoadBalancer
+  externalPort: 8000
+  internalPort: 8000
+ingress:
+  enabled: false
+  hosts:
+    - httpbin.local
+resources: {}

test/integration/happypath.yaml

@@ -0,0 +1,13 @@
+repositories:
+  - name: stable
+    url: https://kubernetes-charts.storage.googleapis.com/
+
+context: minikube
+
+releases:
+
+  - name: httpbin
+    chart: ./charts/httpbin
+    set:
+      - name: ingress.enabled
+        value: false

test/integration/lib/ensure.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+# Check environment is correctly setup
+
+if ! hash minikube 2>/dev/null; then
+    fail "Minikube needs to be installed."
+fi
+if [ ! $(minikube status --format '{{.MinikubeStatus}}') == "Running" ]; then
+    fail "Minikube is not running."
+fi
+if [ ! $(minikube status --format '{{.ClusterStatus}}') == "Running" ]; then
+    fail "Minikube Cluster is not running."
+fi
+if ! kubectl version --short 1> /dev/null; then
+    fail "Could not connect to minikube apiserver"
+fi
+if ! hash curl 1>/dev/null; then
+    fail "curl needs to be installed."
+fi
+if ! hash docker 1>/dev/null; then
+    fail "Docker needs to be installed."
+fi
+if ! docker version 1> /dev/null; then
+    fail "Could not connect to Docker daemon"
+fi
+if ! hash helm 1>/dev/null; then
+    fail "Helm needs to be installed."
+fi

test/integration/lib/output.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+
+declare -i tests_total=0
+
+function info () {
+    tput bold; tput setaf 4; echo -n "INFO: "; tput sgr0; echo "${@}"
+}
+function warn () {
+    tput bold; tput setaf 3; echo -n "WARN: "; tput sgr0; echo "${@}"
+}
+function fail () {
+    tput bold; tput setaf 1; echo -n "FAIL: "; tput sgr0; echo "${@}"
+    exit 1
+}
+function test_start () {
+    tput bold; tput setaf 6; echo -n "TEST: "; tput sgr0; echo "${@}"
+}
+function test_pass () {
+    tests_total=$((tests_total+1))
+    tput bold; tput setaf 2; echo -n "PASS: "; tput sgr0; echo "${@}"
+}
+function all_tests_passed () {
+    tput bold; tput setaf 2; echo -n "PASS: "; tput sgr0; echo "${tests_total} tests passed"
+}

test/integration/run.sh

@@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+
+# IMPORTS -----------------------------------------------------------------------------------------------------------
+
+# determine working directory to use to relative paths irrespective of starting directory
+dir="${BASH_SOURCE%/*}"
+if [[ ! -d "${dir}" ]]; then dir="${PWD}"; fi
+
+. "${dir}/lib/output.sh"
+. "${dir}/lib/ensure.sh"
+
+
+# GLOBALS -----------------------------------------------------------------------------------------------------------
+
+test_ns="helmfile-tests-$(date +"%Y%m%d-%H%M%S")"
+helmfile="./helmfile --namespace=${test_ns}"
+helm="helm --kube-context=minikube"
+kubectl="kubectl --context=minikube --namespace=${test_ns}"
+
+# FUNCTIONS ----------------------------------------------------------------------------------------------------------
+
+function wait_deploy_ready() {
+    $kubectl rollout status deployment ${1}
+    while [ "$($kubectl get deploy ${1} -o=jsonpath='{.status.readyReplicas}')" == "0" ]; do
+        info "Waiting for deployment ${1} to be ready"
+        sleep 1
+    done
+}
+
+# RUN BUILD & SETUP --------------------------------------------------------------------------------------------------
+
+set -e
+$helm init 1> /dev/null
+make build 1> /dev/null
+$helmfile -v 1> /dev/null
+$kubectl get namespace ${test_ns} &> /dev/null && warn "Namespace ${test_ns} exists, from a previous test run?"
+trap "{ $kubectl delete namespace ${test_ns}; }" EXIT # remove namespace whenever we exit this script
+
+info "Using namespace: ${test_ns}"
+info "Using Helm version: $(helm version --short --client | grep -o v.*$)"
+
+# TEST CASES----------------------------------------------------------------------------------------------------------
+
+test_start "happypath - simple rollout of httpbin chart"
+$helmfile -f ${dir}/happypath.yaml sync
+wait_deploy_ready httpbin-httpbin
+curl --fail $(minikube service --url --namespace=${test_ns} httpbin-httpbin)/status/200 \
+    || fail "httpbin failed to return 200 OK"
+$helmfile -f ${dir}/happypath.yaml delete
+$helm status --namespace=${test_ns} httpbin &> /dev/null \
+    && fail "release should not exist anymore after a delete"
+test_pass "happypath"
+
+
+# ALL DONE -----------------------------------------------------------------------------------------------------------
+
+all_tests_passed