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add: lab14 solution
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‎k8s/ROLLOUTS.md‎

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‎k8s/devops-python-app/templates/analysistemplate.yaml‎

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{{- if and .Values.rollout.enabled .Values.rollout.analysis.enabled }}
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apiVersion: argoproj.io/v1alpha1
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kind: AnalysisTemplate
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metadata:
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name: {{ include "devops-python-app.fullname" . }}-health-check
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labels:
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{{- include "devops-python-app.labels" . | nindent 4 }}
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spec:
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metrics:
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- name: health-check
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interval: 10s
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count: 5
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successCondition: result == "ok"
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failureLimit: 3
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provider:
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web:
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url: http://{{ include "devops-python-app.fullname" . }}-service.{{ .Release.Namespace }}.svc.cluster.local/health
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jsonPath: "{$.status}"
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timeoutSeconds: 5
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- name: canary-health
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interval: 15s
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count: 3
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successCondition: result == "ok"
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failureLimit: 2
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provider:
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web:
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url: http://{{ include "devops-python-app.fullname" . }}-service-preview.{{ .Release.Namespace }}.svc.cluster.local/health
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jsonPath: "{$.status}"
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timeoutSeconds: 5
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---
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apiVersion: argoproj.io/v1alpha1
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kind: AnalysisTemplate
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metadata:
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name: {{ include "devops-python-app.fullname" . }}-error-rate
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labels:
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{{- include "devops-python-app.labels" . | nindent 4 }}
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spec:
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metrics:
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- name: error-rate
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interval: 30s
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count: 3
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successCondition: default(result, 0) < 0.05
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failureLimit: 2
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provider:
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prometheus:
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address: "http://prometheus-server.monitoring.svc.cluster.local:9090"
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query: |
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sum(rate(http_requests_total{status=~"5.*"}[1m])) /
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sum(rate(http_requests_total[1m]))
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{{- end }}

‎k8s/devops-python-app/templates/deployment.yaml‎

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{{- if not .Values.rollout.enabled }}
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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claimName: {{ include "devops-python-app.pvcName" . }}
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{{- end }}
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{{- end }}
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{{- end }}

‎k8s/devops-python-app/templates/rollout.yaml‎

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{{- if .Values.rollout.enabled }}
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apiVersion: argoproj.io/v1alpha1
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kind: Rollout
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metadata:
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name: {{ include "devops-python-app.fullname" . }}
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labels:
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{{- include "devops-python-app.labels" . | nindent 4 }}
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spec:
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replicas: {{ .Values.replicaCount }}
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revisionHistoryLimit: {{ .Values.rollout.revisionHistoryLimit }}
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selector:
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matchLabels:
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{{- include "devops-python-app.selectorLabels" . | nindent 6 }}
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template:
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metadata:
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labels:
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{{- include "devops-python-app.selectorLabels" . | nindent 8 }}
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app.kubernetes.io/component: api
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{{- if or .Values.configMap.file.enabled .Values.configMap.env.enabled .Values.vault.enabled }}
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annotations:
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{{- if .Values.configMap.file.enabled }}
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checksum/config-file: {{ .Files.Get "files/config.json" | sha256sum }}
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{{- end }}
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{{- if .Values.configMap.env.enabled }}
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checksum/config-env: {{ printf "%s|%s|%s" .Values.appConfig.appEnv .Values.appConfig.logLevel (toYaml .Values.configMap.env.data) | sha256sum }}
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{{- end }}
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{{- if .Values.vault.enabled }}
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vault.hashicorp.com/agent-inject: "true"
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vault.hashicorp.com/role: {{ .Values.vault.role | quote }}
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{{ printf "vault.hashicorp.com/agent-inject-secret-%s" .Values.vault.fileName | quote }}: {{ .Values.vault.secretPath | quote }}
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{{ printf "vault.hashicorp.com/secret-volume-path-%s" .Values.vault.fileName | quote }}: {{ .Values.vault.mountPath | quote }}
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{{ printf "vault.hashicorp.com/agent-inject-command-%s" .Values.vault.fileName | quote }}: {{ .Values.vault.injectCommand | quote }}
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{{ printf "vault.hashicorp.com/agent-inject-template-%s" .Values.vault.fileName | quote }}: |
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{{ .Values.vault.template | nindent 10 }}
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{{- end }}
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{{- end }}
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spec:
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serviceAccountName: {{ include "devops-python-app.serviceAccountName" . }}
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containers:
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- name: {{ include "devops-python-app.name" . }}
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image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
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imagePullPolicy: {{ .Values.image.pullPolicy }}
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ports:
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- name: http
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containerPort: {{ .Values.container.port }}
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protocol: TCP
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env:
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{{- include "devops-python-app.commonEnv" . | nindent 12 }}
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{{- with .Values.extraEnv }}
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{{- toYaml . | nindent 12 }}
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{{- end }}
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{{- if or .Values.secret.enabled .Values.configMap.env.enabled }}
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envFrom:
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{{- if .Values.secret.enabled }}
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- secretRef:
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name: {{ include "devops-python-app.secretName" . }}
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{{- end }}
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{{- if .Values.configMap.env.enabled }}
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- configMapRef:
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name: {{ include "devops-python-app.configEnvConfigMapName" . }}
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{{- end }}
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{{- end }}
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{{- if or .Values.configMap.file.enabled .Values.persistence.enabled }}
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volumeMounts:
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{{- if .Values.configMap.file.enabled }}
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- name: app-config
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mountPath: {{ .Values.configMap.file.mountPath }}
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readOnly: true
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{{- end }}
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{{- if .Values.persistence.enabled }}
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- name: app-data
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mountPath: {{ .Values.persistence.mountPath }}
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{{- end }}
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{{- end }}
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resources:
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{{- toYaml .Values.resources | nindent 12 }}
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readinessProbe:
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{{- toYaml .Values.readinessProbe | nindent 12 }}
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livenessProbe:
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{{- toYaml .Values.livenessProbe | nindent 12 }}
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{{- if or .Values.configMap.file.enabled .Values.persistence.enabled }}
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volumes:
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{{- if .Values.configMap.file.enabled }}
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- name: app-config
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configMap:
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name: {{ include "devops-python-app.configFileConfigMapName" . }}
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{{- end }}
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{{- if .Values.persistence.enabled }}
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- name: app-data
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persistentVolumeClaim:
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claimName: {{ include "devops-python-app.pvcName" . }}
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{{- end }}
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{{- end }}
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strategy:
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{{- if eq .Values.rollout.strategy "canary" }}
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canary:
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{{- if .Values.rollout.canary.useAnalysis }}
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steps:
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- setWeight: 20
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- analysis:
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templates:
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- templateName: {{ include "devops-python-app.fullname" . }}-health-check
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- setWeight: 50
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- pause: { duration: 30s }
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- analysis:
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templates:
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- templateName: {{ include "devops-python-app.fullname" . }}-health-check
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- setWeight: 100
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{{- else }}
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steps:
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{{- toYaml .Values.rollout.canary.steps | nindent 8 }}
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{{- end }}
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{{- else if eq .Values.rollout.strategy "blueGreen" }}
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blueGreen:
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activeService: {{ include "devops-python-app.fullname" . }}-service
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previewService: {{ include "devops-python-app.fullname" . }}-service-preview
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autoPromotionEnabled: {{ .Values.rollout.blueGreen.autoPromotionEnabled }}
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{{- if .Values.rollout.blueGreen.autoPromotionSeconds }}
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autoPromotionSeconds: {{ .Values.rollout.blueGreen.autoPromotionSeconds }}
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{{- end }}
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{{- end }}
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{{- end }}

‎k8s/devops-python-app/templates/service-preview.yaml‎

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{{- if and .Values.rollout.enabled (eq .Values.rollout.strategy "blueGreen") }}
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apiVersion: v1
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kind: Service
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metadata:
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name: {{ include "devops-python-app.fullname" . }}-service-preview
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labels:
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{{- include "devops-python-app.labels" . | nindent 4 }}
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app.kubernetes.io/component: service-preview
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spec:
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type: {{ .Values.service.type }}
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selector:
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{{- include "devops-python-app.selectorLabels" . | nindent 4 }}
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ports:
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- name: http
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protocol: TCP
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port: {{ .Values.service.port }}
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targetPort: {{ .Values.service.targetPort }}
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{{- end }}

‎k8s/devops-python-app/values-dev.yaml‎

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replicaCount: 1
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rollout:
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strategy: canary
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blueGreen:
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autoPromotionEnabled: false
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image:
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tag: latest
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‎k8s/devops-python-app/values-prod.yaml‎

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replicaCount: 3
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rollout:
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strategy: canary
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blueGreen:
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autoPromotionEnabled: false
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image:
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tag: "1.0.0"
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‎k8s/devops-python-app/values.yaml‎

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failureThreshold: 3
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successThreshold: 1
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rollout:
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enabled: true
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revisionHistoryLimit: 3
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strategy: canary
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canary:
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steps:
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- setWeight: 20
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- pause: {}
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- setWeight: 40
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- pause: { duration: 30s }
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- setWeight: 60
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- pause: { duration: 30s }
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- setWeight: 80
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- pause: { duration: 30s }
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- setWeight: 100
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useAnalysis: false
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blueGreen:
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autoPromotionEnabled: false
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autoPromotionSeconds: null
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analysis:
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enabled: false
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hooks:
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enabled: true
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image: busybox:1.36

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