Lab10 Complete

k8s/dinfochart/.gitignore

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+/charts/

k8s/dinfochart/.helmignore

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+# 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/

k8s/dinfochart/Chart.yaml

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+apiVersion: v2
+name: dinfochart
+description: A Helm chart for devops-infoservice
+
+# 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: 0.1.0
+
+# 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: "1.1.1"

k8s/dinfochart/templates/_helpers.tpl

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+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "dinfochart.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 "dinfochart.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 "dinfochart.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "dinfochart.labels" -}}
+helm.sh/chart: {{ include "dinfochart.chart" . }}
+{{ include "dinfochart.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "dinfochart.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "dinfochart.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "dinfochart.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "dinfochart.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}

k8s/dinfochart/templates/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "dinfochart.fullname" . }}
+  labels:
+    {{- include "dinfochart.labels" . | nindent 4 }}
+spec:
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      {{- include "dinfochart.selectorLabels" . | nindent 6 }}
+  strategy:
+    type: RollingUpdate
+    rollingUpdate:
+      maxSurge: 1        # Extra pods during update
+      maxUnavailable: 0  # Ensure availability
+  template:
+    metadata:
+      labels:
+        {{- include "dinfochart.labels" . | nindent 8 }}
+        {{- with .Values.podLabels }}
+        {{- toYaml . | nindent 8 }}
+        {{- end }}
+    spec:
+      containers:
+        - name: {{ .Chart.Name }}
+          image:  "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
+          ports:
+          - containerPort: {{ .Values.service.port }}
+          {{- with .Values.resources }}
+          resources:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
+          {{- with .Values.livenessProbe }}
+          livenessProbe:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
+          {{- with .Values.readinessProbe }}
+          readinessProbe:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}

k8s/dinfochart/templates/hooks/post-install-job.yaml

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+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: '{{ include "dinfochart.fullname" . }}-post-install'
+  labels:
+    {{- include "dinfochart.labels" . | nindent 4 }}
+  annotations:
+    "helm.sh/hook": post-install
+    "helm.sh/hook-weight": "5"
+    "helm.sh/hook-delete-policy": hook-succeeded
+spec:
+  template:
+    metadata:
+      name: '{{ include "dinfochart.fullname" . }}-post-install'
+    spec:
+      restartPolicy: Never
+      containers:
+      - name: post-install-job
+        image: busybox
+        command: ['sh', '-c', 'echo Post-install validation && sleep 1 && echo Validation passed']

k8s/dinfochart/templates/hooks/pre-install-job.yaml

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+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: '{{ include "dinfochart.fullname" . }}-pre-install'
+  labels:
+    {{- include "dinfochart.labels" . | nindent 4 }}
+  annotations:
+    "helm.sh/hook": pre-install
+    "helm.sh/hook-weight": "-5"
+    "helm.sh/hook-delete-policy": hook-succeeded
+spec:
+  template:
+    metadata:
+      name: '{{ include "dinfochart.fullname" . }}-pre-install'
+    spec:
+      restartPolicy: Never
+      containers:
+      - name: pre-install-job
+        image: busybox
+        command: ['sh', '-c', 'echo Pre-install task running && sleep 1 && echo Pre-install completed']

k8s/dinfochart/templates/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "dinfochart.fullname" . }}
+  labels:
+    {{- include "dinfochart.labels" . | nindent 4 }}
+spec:
+  type: NodePort
+  selector:
+    {{- include "dinfochart.selectorLabels" . | nindent 4 }}
+  ports:
+    - protocol: TCP
+      port: {{ .Values.service.port }}
+      targetPort: {{ .Values.service.targetPort }}

k8s/dinfochart/values-dev.yaml

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+replicaCount: 1
+
+image:
+  tag: "latest"
+
+resources:
+  limits:
+    cpu: 100m
+    memory: 128Mi
+  requests:
+    cpu: 50m
+    memory: 64Mi
+
+service:
+  type: NodePort
+
+livenessProbe:
+  initialDelaySeconds: 5
+  periodSeconds: 10

k8s/dinfochart/values-prod.yaml

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+replicaCount: 5
+
+image:
+  tag: "1.0.0"  # Specific version
+
+resources:
+  limits:
+    cpu: 500m
+    memory: 512Mi
+  requests:
+    cpu: 200m
+    memory: 256Mi
+
+service:
+  type: LoadBalancer
+
+livenessProbe:
+  initialDelaySeconds: 30
+  periodSeconds: 5
+
+readinessProbe:
+  initialDelaySeconds: 10
+  periodSeconds: 3

k8s/dinfochart/values.yaml

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+replicaCount: 5
+image:
+  repository: timurusmanov/devops-infoservice
+  tag: "1.1.1"
+  pullPolicy: IfNotPresent
+
+service:
+  type: NodePort
+  port: 80
+  targetPort: 5000
+
+resources:
+  limits:
+    cpu: 200m
+    memory: 256Mi
+  requests:
+    cpu: 100m
+    memory: 128Mi
+
+livenessProbe:
+  httpGet:
+    path: /health
+    port: 5000
+  initialDelaySeconds: 10
+  periodSeconds: 5
+
+readinessProbe:
+  httpGet:
+    path: /health
+    port: 5000
+  initialDelaySeconds: 5
+  periodSeconds: 3