Kube version helm (#190)

* fix kube version retrieval in helm template helpers

* add helm lint test

* change kube-version retrieval on emtp

.travis.yml

@@ -23,17 +23,20 @@ jobs:
       script: make unit-test
       name: Unit Tests
       after_success: bash <(curl -s https://codecov.io/bash) -v
+    - stage: Test
+      script: make helm-lint
+      name: Helm v2 and v3 Lint
     - stage: Test
       script: test/go-report-card-test/run-report-card-test.sh
       name: Go Report Card Test
     - stage: Test
-      script: make create-build-dir build-binaries
+      script: make build-binaries
       name: Build Binaries
     - stage: Test
-      script: make create-build-dir build-docker-images
+      script: make build-docker-images
       name: Build Docker Images
     - stage: Test
-      script: make create-build-dir generate-k8s-yaml
+      script: make generate-k8s-yaml
       name: Generate K8s yaml files
     - stage: Test
       if: type = push AND env(GITHUB_TOKEN) IS present

Makefile

@@ -11,13 +11,12 @@ MAKEFILE_PATH = $(dir $(realpath -s $(firstword $(MAKEFILE_LIST))))
 BUILD_DIR_PATH = ${MAKEFILE_PATH}/build
 SUPPORTED_PLATFORMS ?= "linux/amd64,linux/arm64,linux/arm"
 
+$(shell mkdir -p ${BUILD_DIR_PATH} && touch ${BUILD_DIR_PATH}/_go.mod)
+
 compile:
 	@echo ${MAKEFILE_PATH}
 	go build -a -tags nth${GOOS} -o ${BUILD_DIR_PATH}/node-termination-handler ${MAKEFILE_PATH}/cmd/node-termination-handler.go
 
-create-build-dir:
-	mkdir -p ${BUILD_DIR_PATH}
-
 clean:
 	rm -rf ${BUILD_DIR_PATH}/
 
@@ -65,6 +64,9 @@ helm-sync-test:
 helm-version-sync-test:
 	${MAKEFILE_PATH}/test/helm-sync-test/run-helm-version-sync-test
 
+helm-lint:
+	${MAKEFILE_PATH}/test/helm/helm-lint
+
 build-binaries:
 	${MAKEFILE_PATH}/scripts/build-binaries -p ${SUPPORTED_PLATFORMS} -v ${VERSION}
 
@@ -77,17 +79,17 @@ generate-k8s-yaml:
 sync-readme-to-dockerhub:
 	${MAKEFILE_PATH}/scripts/sync-readme-to-dockerhub
 
-unit-test: create-build-dir
+unit-test:
 	go test -bench=. ${MAKEFILE_PATH}/... -v -coverprofile=coverage.txt -covermode=atomic -outputdir=${BUILD_DIR_PATH}
 
 unit-test-linux:
 	${MAKEFILE_PATH}/scripts/run-unit-tests-in-docker
 
-build: create-build-dir compile
+build: compile
 
-helm-tests: helm-sync-test helm-version-sync-test
+helm-tests: helm-sync-test helm-version-sync-test helm-lint
 
-release: create-build-dir build-binaries build-docker-images push-docker-images generate-k8s-yaml upload-resources-to-github
+release: build-binaries build-docker-images push-docker-images generate-k8s-yaml upload-resources-to-github
 
 test: unit-test e2e-test compatibility-test license-test go-report-card-test helm-sync-test
 

config/helm/aws-node-termination-handler/templates/_helpers.tpl

@@ -71,7 +71,8 @@ In 1.14 "beta.kubernetes.io" was deprecated and is scheduled for removal in 1.18
 See https://v1-14.docs.kubernetes.io/docs/setup/release/notes/#deprecations
 */}}
 {{- define "aws-node-termination-handler.defaultNodeSelectorTermsPrefix" -}}
-    {{- semverCompare "<1.14" .Capabilities.KubeVersion.Version | ternary "beta.kubernetes.io" "kubernetes.io" -}}
+    {{- $k8sVersion := printf "%s.%s" .Capabilities.KubeVersion.Major .Capabilities.KubeVersion.Minor -}}
+    {{- semverCompare "<1.14" $k8sVersion | ternary "beta.kubernetes.io" "kubernetes.io" -}}
 {{- end -}}
 
 {{/*

config/helm/ec2-metadata-test-proxy/templates/daemonset.yaml

@@ -1,6 +1,7 @@
 {{- if .Values.ec2MetadataTestProxy.create -}}
 {{- $isWindows := (contains "windows" .Values.targetNodeOs) -}}
-{{- $osSelector := (semverCompare "<1.14" .Capabilities.KubeVersion.Version | ternary "beta.kubernetes.io/os" "kubernetes.io/os") -}}
+{{- $k8sVersion := printf "%s.%s" .Capabilities.KubeVersion.Major .Capabilities.KubeVersion.Minor -}}
+{{- $osSelector := (semverCompare "<1.14" $k8sVersion | ternary "beta.kubernetes.io/os" "kubernetes.io/os") -}}
 apiVersion: apps/v1
 kind: DaemonSet
 metadata:

config/helm/ec2-metadata-test-proxy/templates/regular-pod-test.yaml

@@ -1,6 +1,7 @@
 {{- if .Values.regularPodTest.create -}}
 {{- $isWindows := (contains "windows" .Values.targetNodeOs) -}}
-{{- $osSelector := (semverCompare "<1.14" .Capabilities.KubeVersion.Version | ternary "beta.kubernetes.io/os" "kubernetes.io/os") -}}
+{{- $k8sVersion := printf "%s.%s" .Capabilities.KubeVersion.Major .Capabilities.KubeVersion.Minor -}}
+{{- $osSelector := (semverCompare "<1.14" $k8sVersion | ternary "beta.kubernetes.io/os" "kubernetes.io/os") -}}
 apiVersion: apps/v1
 kind: Deployment
 metadata:

scripts/generate-k8s-yaml

@@ -26,13 +26,16 @@ EOM
 )
 
 # Process our input arguments
-while getopts "n:" opt; do
+while getopts "vn:" opt; do
   case ${opt} in
     n ) # K8s namespace
         NAMESPACE=$OPTARG
       ;;
+    v ) # Verbose
+        set -x 
+      ;;
     \? )
-        echoerr "$USAGE" 1>&2
+        echo "$USAGE" 1>&2
         exit
       ;;
   esac

test/helm/helm-lint

@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPTPATH="$( cd "$(dirname "$0")" ; pwd -P )"
+TMP_DIR="$SCRIPTPATH/../../build"
+PLATFORM=$(uname | tr '[:upper:]' '[:lower:]')
+HELM3_VERSION="3.2.4"
+HELM2_VERSION="2.16.9"
+
+mkdir -p $TMP_DIR
+
+if [ ! -x "$TMP_DIR/helm" ]; then
+    echo "🥑 Downloading the \"helm3\" binary"
+    curl -L https://get.helm.sh/helm-v$HELM3_VERSION-$PLATFORM-amd64.tar.gz | tar zxf - -C $TMP_DIR
+    mv $TMP_DIR/$PLATFORM-amd64/helm $TMP_DIR/.
+    chmod +x $TMP_DIR/helm
+    echo "👍 Downloaded the \"helm\" binary"
+fi
+
+if [ ! -x "$TMP_DIR/helm2" ]; then
+    echo "🥑 Downloading the \"helm2\" binary"
+    curl -L https://get.helm.sh/helm-v$HELM2_VERSION-$PLATFORM-amd64.tar.gz | tar zxf - -C $TMP_DIR
+    mv $TMP_DIR/$PLATFORM-amd64/helm $TMP_DIR/helm2
+    chmod +x $TMP_DIR/helm2
+    echo "👍 Downloaded the \"helm2\" binary"
+fi
+export PATH=$TMP_DIR:$PATH
+
+echo "=============================================================================="
+echo "                     Linting Helm Chart w/ Helm v3"
+echo "=============================================================================="
+helm lint $SCRIPTPATH/../../config/helm/aws-node-termination-handler/ 
+
+echo "=============================================================================="
+echo "                     Linting Helm Chart w/ Helm v2"
+echo "=============================================================================="
+helm2 lint $SCRIPTPATH/../../config/helm/aws-node-termination-handler/ 
+
+echo "✅ Helm Linting for v2 and v3 have successfully completed!"