展开查看详情
1.Take the Helm
An Intro to Helm
3.Helm, a package manager
for Kubernetes
4.Helm: Core Concepts
● Chart - expert built recipe for installing an application
● Values - user supplied configuration
● Release - instance of Chart + Values that get deployed in
Kubernetes
5.Prerequisites
● Download Helm & put it in your path
○ On a Mac: brew install kubernetes-helm
○ On Windows: choco install kubernetes-helm
○ Get the binary:
https://github.com/helm/helm/releases/tag/v2.11.0
● Grab a running Kubernetes cluster
○ Minikube:
https://github.com/kubernetes/minikube/releases/tag/v0.30.0
6.$ helm init
● Configures your local environment
● Creates a pod called Tiller in your cluster
7.Tiller
● Server-side component
● Runs as a pod in the cluster
● Manages releases in your cluster
Helm gRPC
Tiller
Client
Kubernetes
8.Charts
● Are application definitions
● Consist of
○ Metadata
○ Kubernetes resource definitions
○ Configuration
○ Documentation
● Live in chart repositories
9.Where the Helm do I find charts?
● Lives at github.com/helm/charts
● Stable & Incubator repositories
● ~218 stable charts
● ~53 incubator charts
10.hub.kubeapps.com
● github.com/helm/monocular
11.Chart repositories
● Has an index.yaml file
● Any web server accessible via http(s)
12.Recap
● Helm is the client
● Tiller is the server
● Charts are the “package”
● Chart + Values = Release
16.Chart Structure
myapp
├── Chart.yaml
├── README.md
├── charts
├── templates
└── values.yaml
17.Templates
myapp
├── Chart.yaml
├── README.md
├── charts
├── templates
│ ├── deployment.yaml
│ └── svc.yaml
└── values.yaml
18.Configuration values.yaml
image: mycompany/myapp:1.0.0
imagePullPolicy: IfNotPresent
myapp service:
port: 80
├── Chart.yaml templates/deployment.yaml
├── README.md apiVersion: extensions/v1beta1
kind: Deployment
├── charts spec:
template:
├── templates spec:
containers:
└── values.yaml - name: {{ .Chart.Name }}
image: "{{ .Values.image }}"
└── requirements.yaml imagePullPolicy: {{ .Values.imagePullPolicy }}
ports:
- containerPort: {{ .Values.service.port }}
19. Configuration values.yaml
image: mycompany/myapp:1.0.0
imagePullPolicy: IfNotPresent
service:
port: 80
Configure values on command line with the --set flag
$ helm install --set service.port=8080 myapp/
Or pass in a new values file on command line with the -f flag
$ helm install -f myvalues.yaml myapp
20.Dependencies
requirements.yaml
myapp dependencies:
├── Chart.yaml - name: mariadb
version: 0.5.2
repository: http://storage.googleapis.com/kubernetes-charts
├── README.md
├── charts
├── templates
└── values.yaml
└── requirements.yaml
21.Documentation
myapp
├── Chart.yaml
├── README.md
├── charts
├── templates
└── NOTES.txt
└── values.yaml
22.Metadata
myapp
├── Chart.yaml
├── README.md
├── charts
├── templates
└── values.yaml
└── requirements.yaml
23.Want to become a Helmette?
24.Helm Community
● Lots of contributors (391 according to GitHub)
● Kubernetes slack channels: #helm-users, #helm-dev
● Weekly updates and demos at SIG Apps and the
public Helm developer call (09:30 Pacific Time)
● Documentation at http://docs.helm.sh
25.Helpful Links
● Helm website: http://helm.sh
● Helm quickstart: https://docs.helm.sh/using_helm/#quickstart
● Helm documentation: https://docs.helm.sh
● Chart tips & tricks: https://youtu.be/16FU6U8eOdk?t=12m36s
