diff --git a/k8s/HELM.md b/k8s/HELM.md new file mode 100644 index 0000000000..a0f6ffb60c --- /dev/null +++ b/k8s/HELM.md @@ -0,0 +1,249 @@ + +# Lab 10 — Helm Package Manager + +![difficulty](https://img.shields.io/badge/difficulty-intermediate-yellow) +![topic](https://img.shields.io/badge/topic-Helm-blue) +![points](https://img.shields.io/badge/points-12%2B2.5-orange) +![tech](https://img.shields.io/badge/tech-Helm-informational) + +> Package your Kubernetes applications with Helm for reusable, configurable deployments across environments. + +--- + +## Chart Overview + +This Helm chart (`myapp`) converts Kubernetes manifests from Lab 9 into a reusable, configurable deployment system. + +### Structure + +``` + +myapp/ +├── Chart.yaml +├── values.yaml +├── values-dev.yaml +├── values-prod.yaml +└── templates/ +├── deployment.yaml +├── service.yaml +└── hooks/ +├── pre-install-job.yaml +└── post-install-job.yaml + +```` + +### Key Components + +- **Deployment template** — runs the Python application with configurable replicas, image, and resources +- **Service template** — exposes the application inside cluster (NodePort / ClusterIP) +- **Values files** — environment-based configuration (dev/prod) +- **Hooks** — lifecycle jobs executed before and after deployment + +--- + +## Configuration Guide + +### Main values (`values.yaml`) + +- `replicaCount` — number of pods +- `image.repository` — Docker image name +- `image.tag` — image version +- `service.port` — exposed port +- `service.targetPort` — container port (5000) +- `resources` — CPU/memory limits +- `livenessProbe` — health check configuration +- `readinessProbe` — readiness check configuration + +### Dev environment (`values-dev.yaml`) + +- 1 replica +- lightweight CPU/memory limits +- NodePort service +- relaxed probes + +### Prod environment (`values-prod.yaml`) + +- 3–5 replicas +- higher resource limits +- LoadBalancer-ready configuration +- stricter probes + +### Example usage + +```bash +helm install myapp-dev ./myapp -f values-dev.yaml +helm install myapp-prod ./myapp -f values-prod.yaml +```` + +--- + +## Hook Implementation + +### Pre-install hook + +Executes before deployment starts. + +* Used for initialization / validation +* Runs a Kubernetes Job + +### Post-install hook + +Executes after deployment completes. + +* Used for smoke tests or verification +* Confirms application readiness + +### Hook execution order + +``` +Pre-install → Deploy resources → Post-install +``` + +### Hook weights + +* `-5` → pre-install (runs first) +* `5` → post-install (runs last) + +### Deletion policy + +Hooks are configured with: + +``` +hook-delete-policy: hook-succeeded +``` + +This ensures: + +* cleanup after successful execution +* no leftover Jobs in cluster + +--- + +## Installation Evidence + +### Helm release list + +```bash +helm list +``` + +📸 Screenshot: `lab10-set.png` + +--- + +### Kubernetes resources + +```bash +kubectl get all +``` + +📸 Screenshot: `lab10-set.png` + +--- + +### Application running + +```bash +kubectl get pods +kubectl get svc +``` + +📸 Screenshot: `lab10-app.png` + +--- + +### Hooks execution + +```bash +kubectl get jobs +kubectl logs job/ +kubectl logs job/ +``` + +📸 Screenshot: `lab10-hooks.png` + +--- + +## Operations + +### Install + +```bash +helm install myapp-release ./myapp +``` + +### Upgrade + +```bash +helm upgrade myapp-release ./myapp +``` + +### Rollback + +```bash +helm rollback myapp-release 1 +``` + +### Uninstall + +```bash +helm uninstall myapp-release +``` + +--- + +## Testing & Validation + +### Chart validation + +```bash +helm lint ./myapp +``` + +### Template rendering + +```bash +helm template myapp ./myapp +``` + +### Dry-run install + +```bash +helm install test ./myapp --dry-run --debug +``` + +### Result + +* Deployment successfully created +* Service exposed via NodePort +* Application accessible in browser via `http://localhost:8080` + +--- + +## Summary + +This Helm chart demonstrates: + +* templating Kubernetes manifests +* environment-based configuration +* lifecycle hooks (pre/post install) +* production-ready structure +* reusable deployment patterns + +Helm significantly improves maintainability, scalability, and repeatability of Kubernetes deployments. + +--- + +## Screenshots + +### Cluster setup & Helm state + +![lab10-set](lab10-set.png) + +### Application running + +![lab10-app](lab10-app.png) + +### Hooks execution + +![lab10-hooks](lab10-hooks.png) diff --git a/k8s/myapp/.helmignore b/k8s/myapp/.helmignore new file mode 100644 index 0000000000..0e8a0eb36f --- /dev/null +++ b/k8s/myapp/.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/ diff --git a/k8s/myapp/Chart.yaml b/k8s/myapp/Chart.yaml new file mode 100644 index 0000000000..6fae50a492 --- /dev/null +++ b/k8s/myapp/Chart.yaml @@ -0,0 +1,24 @@ +apiVersion: v2 +name: myapp +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: 0.1.0 + +# 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: "1.16.0" diff --git a/k8s/myapp/templates/_helpers.tpl b/k8s/myapp/templates/_helpers.tpl new file mode 100644 index 0000000000..73b52b223a --- /dev/null +++ b/k8s/myapp/templates/_helpers.tpl @@ -0,0 +1,62 @@ +{{/* +Expand the name of the chart. +*/}} +{{- define "myapp.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 "myapp.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 "myapp.chart" -}} +{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }} +{{- end }} + +{{/* +Common labels +*/}} +{{- define "myapp.labels" -}} +helm.sh/chart: {{ include "myapp.chart" . }} +{{ include "myapp.selectorLabels" . }} +{{- if .Chart.AppVersion }} +app.kubernetes.io/version: {{ .Chart.AppVersion | quote }} +{{- end }} +app.kubernetes.io/managed-by: {{ .Release.Service }} +{{- end }} + +{{/* +Selector labels +*/}} +{{- define "myapp.selectorLabels" -}} +app.kubernetes.io/name: {{ include "myapp.name" . }} +app.kubernetes.io/instance: {{ .Release.Name }} +{{- end }} + +{{/* +Create the name of the service account to use +*/}} +{{- define "myapp.serviceAccountName" -}} +{{- if .Values.serviceAccount.create }} +{{- default (include "myapp.fullname" .) .Values.serviceAccount.name }} +{{- else }} +{{- default "default" .Values.serviceAccount.name }} +{{- end }} +{{- end }} diff --git a/k8s/myapp/templates/deployment.yaml b/k8s/myapp/templates/deployment.yaml new file mode 100644 index 0000000000..d781df7ef2 --- /dev/null +++ b/k8s/myapp/templates/deployment.yaml @@ -0,0 +1,33 @@ +apiVersion: apps/v1 +kind: Deployment +metadata: + name: {{ include "myapp.fullname" . }} +spec: + replicas: {{ .Values.replicaCount }} + selector: + matchLabels: + app: {{ include "myapp.name" . }} + template: + metadata: + labels: + app: {{ include "myapp.name" . }} + spec: + containers: + - name: app + image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}" + ports: + - containerPort: {{ .Values.service.targetPort }} + resources: + {{- toYaml .Values.resources | nindent 12 }} + livenessProbe: + httpGet: + path: {{ .Values.livenessProbe.path }} + port: {{ .Values.service.targetPort }} + initialDelaySeconds: {{ .Values.livenessProbe.initialDelaySeconds }} + periodSeconds: {{ .Values.livenessProbe.periodSeconds }} + readinessProbe: + httpGet: + path: {{ .Values.readinessProbe.path }} + port: {{ .Values.service.targetPort }} + initialDelaySeconds: {{ .Values.readinessProbe.initialDelaySeconds }} + periodSeconds: {{ .Values.readinessProbe.periodSeconds }} \ No newline at end of file diff --git a/k8s/myapp/templates/hooks/post-install-job.yaml b/k8s/myapp/templates/hooks/post-install-job.yaml new file mode 100644 index 0000000000..17678b8e07 --- /dev/null +++ b/k8s/myapp/templates/hooks/post-install-job.yaml @@ -0,0 +1,18 @@ +apiVersion: batch/v1 +kind: Job +metadata: + name: "{{ .Release.Name }}-post-install" + annotations: + "helm.sh/hook": post-install + "helm.sh/hook-weight": "5" +spec: + template: + spec: + restartPolicy: Never + containers: + - name: post-install + image: busybox + command: + - sh + - -c + - echo "Post-install hook running..." && sleep 5 && echo "Done" \ No newline at end of file diff --git a/k8s/myapp/templates/hooks/pre-install-job.yaml b/k8s/myapp/templates/hooks/pre-install-job.yaml new file mode 100644 index 0000000000..333a33ff8b --- /dev/null +++ b/k8s/myapp/templates/hooks/pre-install-job.yaml @@ -0,0 +1,18 @@ +apiVersion: batch/v1 +kind: Job +metadata: + name: "{{ .Release.Name }}-pre-install" + annotations: + "helm.sh/hook": pre-install + "helm.sh/hook-weight": "-5" +spec: + template: + spec: + restartPolicy: Never + containers: + - name: pre-install + image: busybox + command: + - sh + - -c + - echo "Pre-install hook running..." && sleep 5 && echo "Done" \ No newline at end of file diff --git a/k8s/myapp/templates/service.yaml b/k8s/myapp/templates/service.yaml new file mode 100644 index 0000000000..8d351007ea --- /dev/null +++ b/k8s/myapp/templates/service.yaml @@ -0,0 +1,11 @@ +apiVersion: v1 +kind: Service +metadata: + name: {{ include "myapp.fullname" . }} +spec: + type: {{ .Values.service.type }} + selector: + app: {{ include "myapp.name" . }} + ports: + - port: {{ .Values.service.port }} + targetPort: {{ .Values.service.targetPort }} \ No newline at end of file diff --git a/k8s/myapp/values.yaml b/k8s/myapp/values.yaml new file mode 100644 index 0000000000..8aa4df589a --- /dev/null +++ b/k8s/myapp/values.yaml @@ -0,0 +1,29 @@ +replicaCount: 3 + +image: + repository: nginx + tag: latest + pullPolicy: IfNotPresent + +service: + type: NodePort + port: 80 + targetPort: 80 + +resources: + limits: + cpu: 200m + memory: 256Mi + requests: + cpu: 100m + memory: 128Mi + +livenessProbe: + path: / + initialDelaySeconds: 10 + periodSeconds: 5 + +readinessProbe: + path: / + initialDelaySeconds: 5 + periodSeconds: 3 \ No newline at end of file diff --git a/k8s/screenshots/lab10-app.png b/k8s/screenshots/lab10-app.png new file mode 100644 index 0000000000..09ba412a9f Binary files /dev/null and b/k8s/screenshots/lab10-app.png differ diff --git a/k8s/screenshots/lab10-hooks.png b/k8s/screenshots/lab10-hooks.png new file mode 100644 index 0000000000..6b24a308db Binary files /dev/null and b/k8s/screenshots/lab10-hooks.png differ diff --git a/k8s/screenshots/lab10-set.png b/k8s/screenshots/lab10-set.png new file mode 100644 index 0000000000..7540830759 Binary files /dev/null and b/k8s/screenshots/lab10-set.png differ diff --git a/windows-amd64/LICENSE b/windows-amd64/LICENSE new file mode 100644 index 0000000000..21c57fae21 --- /dev/null +++ b/windows-amd64/LICENSE @@ -0,0 +1,202 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright 2016 The Kubernetes Authors All Rights Reserved + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/windows-amd64/README.md b/windows-amd64/README.md new file mode 100644 index 0000000000..b279d6af8e --- /dev/null +++ b/windows-amd64/README.md @@ -0,0 +1,75 @@ +# Helm + +[![Build Status](https://github.com/helm/helm/workflows/release/badge.svg)](https://github.com/helm/helm/actions?workflow=release) +[![Go Report Card](https://goreportcard.com/badge/github.com/helm/helm)](https://goreportcard.com/report/github.com/helm/helm) +[![GoDoc](https://img.shields.io/static/v1?label=godoc&message=reference&color=blue)](https://pkg.go.dev/helm.sh/helm/v3) +[![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/3131/badge)](https://bestpractices.coreinfrastructure.org/projects/3131) + +Helm is a tool for managing Charts. Charts are packages of pre-configured Kubernetes resources. + +Use Helm to: + +- Find and use [popular software packaged as Helm Charts](https://artifacthub.io/packages/search?kind=0) to run in Kubernetes +- Share your own applications as Helm Charts +- Create reproducible builds of your Kubernetes applications +- Intelligently manage your Kubernetes manifest files +- Manage releases of Helm packages + +## Helm in a Handbasket + +Helm is a tool that streamlines installing and managing Kubernetes applications. +Think of it like apt/yum/homebrew for Kubernetes. + +- Helm renders your templates and communicates with the Kubernetes API +- Helm runs on your laptop, CI/CD, or wherever you want it to run. +- Charts are Helm packages that contain at least two things: + - A description of the package (`Chart.yaml`) + - One or more templates, which contain Kubernetes manifest files +- Charts can be stored on disk, or fetched from remote chart repositories + (like Debian or RedHat packages) + +## Install + +Binary downloads of the Helm client can be found on [the Releases page](https://github.com/helm/helm/releases/latest). + +Unpack the `helm` binary and add it to your PATH and you are good to go! + +If you want to use a package manager: + +- [Homebrew](https://brew.sh/) users can use `brew install helm`. +- [Chocolatey](https://chocolatey.org/) users can use `choco install kubernetes-helm`. +- [Scoop](https://scoop.sh/) users can use `scoop install helm`. +- [Snapcraft](https://snapcraft.io/) users can use `snap install helm --classic` + +To rapidly get Helm up and running, start with the [Quick Start Guide](https://helm.sh/docs/intro/quickstart/). + +See the [installation guide](https://helm.sh/docs/intro/install/) for more options, +including installing pre-releases. + +## Docs + +Get started with the [Quick Start guide](https://helm.sh/docs/intro/quickstart/) or plunge into the [complete documentation](https://helm.sh/docs) + +## Roadmap + +The [Helm roadmap uses GitHub milestones](https://github.com/helm/helm/milestones) to track the progress of the project. + +## Community, discussion, contribution, and support + +You can reach the Helm community and developers via the following channels: + +- [Kubernetes Slack](https://kubernetes.slack.com): + - [#helm-users](https://kubernetes.slack.com/messages/helm-users) + - [#helm-dev](https://kubernetes.slack.com/messages/helm-dev) + - [#charts](https://kubernetes.slack.com/messages/charts) +- Mailing List: + - [Helm Mailing List](https://lists.cncf.io/g/cncf-helm) +- Developer Call: Thursdays at 9:30-10:00 Pacific ([meeting details](https://github.com/helm/community/blob/master/communication.md#meetings)) + +### Contribution + +If you're interested in contributing, please refer to the [Contributing Guide](CONTRIBUTING.md) **before submitting a pull request**. + +### Code of conduct + +Participation in the Helm community is governed by the [Code of Conduct](code-of-conduct.md).