Added k8s and .gitlab-ci config

go/.gitlab-ci.yml

@@ -0,0 +1,81 @@
+---
+stages:
+  - build
+  - package
+  - acceptance
+  - performance
+
+build:
+  stage: build
+  image: golang:1.19.2-bullseye
+  script:
+    - go install github.com/swaggo/swag/cmd/swag@v1.16.1
+    - swag init
+    - go build -a -o target/bin/gilded-rose ./main.go
+  artifacts:
+    paths:
+      - target/bin/gilded-rose
+
+test:
+  stage: build
+  image: golang:1.19.2-bullseye
+  script:
+    - go install github.com/swaggo/swag/cmd/swag@v1.16.1
+    - swag init
+    - go test ./... -v -coverprofile=coverage.out -covermode count
+    - go install github.com/boumenot/gocover-cobertura@v1.2.0
+    - $GOPATH/bin/gocover-cobertura < coverage.out > coverage.xml
+  coverage: /^coverage:\s(\d+(?:\.\d+)?%)/
+  artifacts:
+    name: $CI_JOB_NAME/coverage.txt
+    paths:
+      - coverage.xml
+    expire_in: 2 days
+    reports:
+      coverage_report:
+        coverage_format: cobertura
+        path: coverage.xml
+
+dockerize:
+  stage: package
+  dependencies: []
+  image:
+    name: gcr.io/kaniko-project/executor:v1.9.0-debug
+    entrypoint: [""]
+  script:
+    - echo "{\"auths\":{\"$CI_REGISTRY\":{\"username\":\"$CI_REGISTRY_USER\",\"password\":\"$CI_JOB_TOKEN\"}}}" > /kaniko/.docker/config.json
+    - |
+      /kaniko/executor \
+      --cache=true \
+      --cache-ttl=720h \
+      --cache-repo "$CI_REGISTRY_IMAGE/cache" \
+      --snapshotMode full \
+      --context "$CI_PROJECT_DIR" \
+      --dockerfile "$CI_PROJECT_DIR/Dockerfile" \
+      --destination "$CI_REGISTRY_IMAGE:${CI_COMMIT_SHORT_SHA}" \
+      --destination "$CI_REGISTRY_IMAGE:${CI_COMMIT_REF_SLUG}_${CI_COMMIT_SHORT_SHA}" \
+      --destination "$CI_REGISTRY_IMAGE:${CI_COMMIT_REF_SLUG}"
+
+helm-package:
+  stage: package
+  image:
+    name: alpine/helm:3.9.2
+    entrypoint: [""]
+  variables:
+    CHART: "gilded-rose"
+    ENVIRONMENT_DEPLOY_HOST: "$CI_COMMIT_REF_SLUG.$CI_PROJECT_NAME.k8sdev.example.int"
+
+  before_script:
+  - apk add git gettext
+  - helm plugin install --version=v0.10.3 https://github.com/chartmuseum/helm-push.git
+  - >
+    helm repo add ${CHART}
+    --username ${CI_REGISTRY_USER}
+    --password ${CI_JOB_TOKEN}
+    ${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/packages/helm/stable
+  script:
+  - cd k8s/charts
+  - cat ${CHART}/Chart.yaml | sed 's/\\\$/{_DOLLAR_}/g' | envsubst | sed 's/{_DOLLAR_}/$/g' > ${CHART}/Chart.prod.yaml && mv ${CHART}/Chart.prod.yaml ${CHART}/Chart.yaml
+  - cat ${CHART}/values.yaml | sed 's/\\\$/{_DOLLAR_}/g' | envsubst | sed 's/{_DOLLAR_}/$/g' > ${CHART}/values.prod.yaml && mv ${CHART}/values.prod.yaml ${CHART}/values.yaml
+  - helm cm-push ${CHART}/ ${CHART}
+

go/k8s/charts/gilded-rose/.helmignore

@@ -0,0 +1,23 @@
+# 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
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

go/k8s/charts/gilded-rose/Chart.yaml

@@ -0,0 +1,24 @@
+apiVersion: v2
+name: gilded-rose
+description: A Helm chart for Kubernetes
+
+# A chart can be either an 'application' or a 'library' chart.
+#
+# Application charts are a collection of templates that can be packaged into versioned archives
+# to be deployed.
+#
+# Library charts provide useful utilities or functions for the chart developer. They're included as
+# a dependency of application charts to inject those utilities and functions into the rendering
+# pipeline. Library charts do not define any templates and therefore cannot be deployed.
+type: application
+
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+# Versions are expected to follow Semantic Versioning (https://semver.org/)
+version: 0.1.$CI_PIPELINE_IID
+
+# This is the version number of the application being deployed. This version number should be
+# incremented each time you make changes to the application. Versions are not expected to
+# follow Semantic Versioning. They should reflect the version the application is using.
+# It is recommended to use it with quotes.
+appVersion: "0.0.0"

go/k8s/charts/gilded-rose/templates/NOTES.txt

@@ -0,0 +1,22 @@
+1. Get the application URL by running these commands:
+{{- if .Values.ingress.enabled }}
+{{- range $host := .Values.ingress.hosts }}
+  {{- range .paths }}
+  http{{ if $.Values.ingress.tls }}s{{ end }}://{{ $host.host }}{{ .path }}
+  {{- end }}
+{{- end }}
+{{- else if contains "NodePort" .Values.backend.service.type }}
+  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "gilded-rose.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.backend.service.type }}
+     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+           You can watch the status of by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "gilded-rose.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "gilded-rose.fullname" . }} --template "{{"{{ range (index .status.loadBalancer.ingress 0) }}{{.}}{{ end }}"}}")
+  echo http://$SERVICE_IP:{{ .Values.backend.service.port }}
+{{- else if contains "ClusterIP" .Values.backend.service.type }}
+  export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app.kubernetes.io/name={{ include "gilded-rose.name" . }},app.kubernetes.io/instance={{ .Release.Name }},service=backend" -o jsonpath="{.items[0].metadata.name}")
+  export CONTAINER_PORT=$(kubectl get pod --namespace {{ .Release.Namespace }} $POD_NAME -o jsonpath="{.spec.containers[0].ports[0].containerPort}")
+  echo "Visit http://127.0.0.1:8080 to use your application"
+  kubectl --namespace {{ .Release.Namespace }} port-forward $POD_NAME 8080:$CONTAINER_PORT
+{{- end }}

go/k8s/charts/gilded-rose/templates/_helpers.tpl

@@ -0,0 +1,62 @@
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "gilded-rose.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).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "gilded-rose.fullname" -}}
+{{- if .Values.fullnameOverride }}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- $name := default .Chart.Name .Values.nameOverride }}
+{{- if contains $name .Release.Name }}
+{{- .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
+{{- end }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "gilded-rose.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "gilded-rose.labels" -}}
+helm.sh/chart: {{ include "gilded-rose.chart" . }}
+{{ include "gilded-rose.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "gilded-rose.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "gilded-rose.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "gilded-rose.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "gilded-rose.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}

go/k8s/charts/gilded-rose/templates/backend-deployment.yaml

@@ -0,0 +1,95 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "gilded-rose.fullname" . }}
+  labels:
+    {{- include "gilded-rose.labels" . | nindent 4 }}
+    service: backend
+spec:
+  {{- if not .Values.backend.autoscaling.enabled }}
+  replicas: {{ .Values.backend.replicaCount }}
+  {{- end }}
+  selector:
+    matchLabels:
+      {{- include "gilded-rose.selectorLabels" . | nindent 6 }}
+      service: backend
+  strategy:
+    type: RollingUpdate
+    rollingUpdate:
+      maxSurge: 1
+      maxUnavailable: 0
+  template:
+    metadata:
+      {{- with .Values.backend.podAnnotations }}
+      annotations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      labels:
+        {{- include "gilded-rose.selectorLabels" . | nindent 8 }}
+        service: backend
+    spec:
+      {{- with .Values.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      serviceAccountName: {{ include "gilded-rose.serviceAccountName" . }}
+      securityContext:
+        {{- toYaml .Values.backend.podSecurityContext | nindent 8 }}
+      containers:
+        - name: {{ .Chart.Name }}
+          securityContext:
+            {{- toYaml .Values.backend.securityContext | nindent 12 }}
+          image: "{{ .Values.backend.image.repository }}:{{ .Values.backend.image.tag | default .Chart.AppVersion }}"
+          imagePullPolicy: {{ .Values.backend.image.pullPolicy }}
+          ports:
+            - name: http
+              containerPort: 8080
+              protocol: TCP
+          livenessProbe:
+            httpGet:
+              path: /status
+              port: http
+          readinessProbe:
+            httpGet:
+              path: /status
+              port: http
+          startupProbe:
+            httpGet:
+              path: /status
+              port: http
+          {{- with .Values.backend.volumeMounts }}
+          volumeMounts:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
+          resources:
+            {{- toYaml .Values.backend.resources | nindent 12 }}
+          env:
+            {{- toYaml .Values.backend.env | nindent 12 }}
+            - name: SERVER_PORT
+              value: "8080"
+      {{- with .Values.backend.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.backend.volumes }}
+      volumes:
+        {{- toYaml . | nindent 8 }}
+      {{- end}}
+      {{- with .Values.backend.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.backend.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      terminationGracePeriodSeconds: 10
+      topologySpreadConstraints:
+      - maxSkew: 1
+        topologyKey: topology.kubernetes.io/zone
+        #topologyKey: kubernetes.io/hostname
+        whenUnsatisfiable: ScheduleAnyway
+        labelSelector:
+          matchLabels:
+            {{- include "gilded-rose.selectorLabels" . | nindent 12 }}
+            service: backend

go/k8s/charts/gilded-rose/templates/backend-hpa.yaml

@@ -0,0 +1,33 @@
+{{- if .Values.backend.autoscaling.enabled }}
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ include "gilded-rose.fullname" . }}
+  labels:
+    {{- include "gilded-rose.labels" . | nindent 4 }}
+    service: backend
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ include "gilded-rose.fullname" . }}
+  minReplicas: {{ .Values.backend.autoscaling.minReplicas }}
+  maxReplicas: {{ .Values.backend.autoscaling.maxReplicas }}
+  metrics:
+    {{- if .Values.backend.autoscaling.targetCPUUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: cpu
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.backend.autoscaling.targetCPUUtilizationPercentage }}
+    {{- end }}
+    {{- if .Values.backend.autoscaling.targetMemoryUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: memory
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.backend.autoscaling.targetMemoryUtilizationPercentage }}
+    {{- end }}
+{{- end }}

go/k8s/charts/gilded-rose/templates/backend-ingress.yaml

@@ -0,0 +1,47 @@
+{{- if .Values.ingress.enabled -}}
+{{- $fullName := include "gilded-rose.fullname" . -}}
+{{- if and .Values.ingress.className (not (semverCompare ">=1.18-0" .Capabilities.KubeVersion.GitVersion)) }}
+  {{- if not (hasKey .Values.ingress.annotations "kubernetes.io/ingress.class") }}
+  {{- $_ := set .Values.ingress.annotations "kubernetes.io/ingress.class" .Values.ingress.className}}
+  {{- end }}
+{{- end }}
+{{- if semverCompare ">=1.19-0" .Capabilities.KubeVersion.GitVersion -}}
+apiVersion: networking.k8s.io/v1
+{{- else if semverCompare ">=1.14-0" .Capabilities.KubeVersion.GitVersion -}}
+apiVersion: networking.k8s.io/v1beta1
+{{- else -}}
+apiVersion: extensions/v1beta1
+{{- end }}
+kind: Ingress
+metadata:
+  name: {{ $fullName }}
+  labels:
+    {{- include "gilded-rose.labels" . | nindent 4 }}
+  {{- with .Values.ingress.annotations }}
+  annotations:
+    {{- tpl (toYaml .) $ | nindent 4 }}
+  {{- end }}
+spec:
+  {{- if and .Values.ingress.className (semverCompare ">=1.18-0" .Capabilities.KubeVersion.GitVersion) }}
+  ingressClassName: {{ .Values.ingress.className }}
+  {{- end }}
+  tls:
+    - hosts:
+        {{- range .Values.ingress.config.deployHosts }}
+        - {{ tpl . $ | quote }}
+        {{- end }}
+      secretName: {{ $fullName }}-tls
+  rules:
+    {{- range .Values.ingress.config.deployHosts }}
+    - host: {{ tpl . $ | quote }}
+      http:
+        paths:
+        - pathType: Prefix
+          path: "/"
+          backend:
+            service:
+              name: {{ $fullName }}
+              port:
+                name: http
+    {{- end}}
+{{- end }}

go/k8s/charts/gilded-rose/templates/backend-pdb.yaml

@@ -0,0 +1,13 @@
+apiVersion: policy/v1
+kind: PodDisruptionBudget
+metadata:
+  name: {{ include "gilded-rose.fullname" . }}-pdb
+  labels:
+    {{- include "gilded-rose.labels" . | nindent 4 }}
+    service: backend
+spec:
+  minAvailable: 1
+  selector:
+    matchLabels:
+      {{- include "gilded-rose.selectorLabels" . | nindent 6 }}
+      service: backend

go/k8s/charts/gilded-rose/templates/backend-service.yaml

@@ -0,0 +1,17 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "gilded-rose.fullname" . }}
+  labels:
+    {{- include "gilded-rose.labels" . | nindent 4 }}
+    service: backend
+spec:
+  type: {{ .Values.backend.service.type }}
+  ports:
+    - port: {{ .Values.backend.service.port }}
+      targetPort: http
+      protocol: TCP
+      name: http
+  selector:
+    {{- include "gilded-rose.selectorLabels" . | nindent 4 }}
+    service: backend

go/k8s/charts/gilded-rose/templates/network-policy.yaml

@@ -0,0 +1,11 @@
+kind: NetworkPolicy
+apiVersion: networking.k8s.io/v1
+metadata:
+  name: np-deny-other-ns
+spec:
+  podSelector:
+    matchLabels:
+      role: internal
+  ingress:
+  - from:
+    - podSelector: {}

go/k8s/charts/gilded-rose/templates/tests/test-connection-backend.yaml

@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: "{{ include "gilded-rose.fullname" . }}-test-connection-backend"
+  labels:
+    {{- include "gilded-rose.labels" . | nindent 4 }}
+  annotations:
+    "helm.sh/hook": test
+spec:
+  containers:
+    - name: wget
+      image: busybox
+      command: ['wget']
+      args: ['{{ include "gilded-rose.fullname" . }}:{{ .Values.backend.service.port }}/status']
+  restartPolicy: Never

go/k8s/charts/gilded-rose/values.yaml

@@ -0,0 +1,85 @@
+# Default values for gilded-rose.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+
+imagePullSecrets: []
+nameOverride: ""
+fullnameOverride: ""
+
+serviceAccount:
+  # Specifies whether a service account should be created
+  create: false
+  # Annotations to add to the service account
+  annotations: {}
+  # The name of the service account to use.
+  # If not set and create is true, a name is generated using the fullname template
+  name: ""
+
+backend:
+  replicaCount: 1
+
+  image:
+    repository: ${CI_REGISTRY_IMAGE}
+    pullPolicy: IfNotPresent
+    # Overrides the image tag whose default is the chart appVersion.
+    tag: "${CI_COMMIT_REF_SLUG}_${CI_COMMIT_SHORT_SHA}"
+
+  podAnnotations: {}
+
+  podSecurityContext:
+    fsGroup: 1000
+    fsGroupChangePolicy: Always
+
+  securityContext: {}
+
+  service:
+    type: ClusterIP
+    port: 8080
+
+  # We usually recommend not to specify default resources and to leave this as a conscious
+  # choice for the user. This also increases chances charts run on environments with little
+  # resources, such as Minikube. If you do want to specify resources, uncomment the following
+  # lines, adjust them as necessary, and remove the curly braces after 'resources:'.
+  resources:
+    requests:
+      cpu: "100m"
+      memory: "128Mi"
+    limits:
+      cpu: "4000m"
+      memory: "1024Mi"
+
+  volumes: []
+
+  volumeMounts: []
+
+  autoscaling:
+    enabled: false
+    minReplicas: 3
+    maxReplicas: 10
+    targetCPUUtilizationPercentage: 500
+    targetMemoryUtilizationPercentage: 400
+
+  nodeSelector: {}
+
+  tolerations: []
+
+  affinity: {}
+
+  env: []
+  # Example:
+  # - name: TZ
+  #   value: "Europe/Madrid"
+
+ingress:
+  enabled: true
+  className: "nginx"
+
+  config:
+    tlsIssuer: "letsencrypt-issuer"
+    deployHosts:
+    - "gilded-rose.k8sdev.example.int"
+
+  annotations:
+    cert-manager.io/cluster-issuer: "{{ .Values.ingress.config.tlsIssuer }}"
+    nginx.ingress.kubernetes.io/force-ssl-redirect: "false"
+    nginx.ingress.kubernetes.io/ssl-redirect: "false"