The document provides an overview of Helm, a package manager for Kubernetes, detailing its functionality and structure, including essential files like values.yml and chart.yaml. It outlines how to create and manage applications with Helm, including installation, upgrades, and rollbacks. Additionally, it highlights the benefits of using Helm for teams, such as easy installation and app portability.

1. Package Manager in K8S
Piotr Perzyna - 03/21/2018

2. Agenda
● What is HELM?
○ 4 Words to know
● How to use it?
● Why teams HELM?

3. What is HELM?
HELM is a package manager like . . . . . . . . for kubernetes app.
● npm
● brew
● pip
● apt
● yum

4. Simple chart
$ helm create application
application/
values.yml # A YAML file containing sample
values
chart.yaml # A YAML file containing information about the
chart
README.md # OPTIONAL: A human-readable README file
requirements.yaml # OPTIONAL: A YAML file listing
charts/ # OPTIONAL: A directory containing depends
charts.
templates/ # OPTIONAL: A directory of
templates K8S manifest
deployment.yml # EXAMPLE
configmap.yml # EXAMPLE
secrets.yml # EXAMPLE
service.yml # EXAMPLE

5. Sample chart
service.yml
apiVersion: v1
kind: Service
metadata:
name: {{ .Values.name }}
namespace: {{ .Values.namespace }}
labels:
app: {{ .Values.name }}
release: {{ .Release.Name }}
spec:
type: {{ .Values.service.type }}
ports:
- protocol: TCP
port: {{ .Values.service.port }}
targetPort: 8000
selector:
app: {{ .Values.name }}
release: {{ .Release.Name }}
values.yml
namespace: default
name: application
image:
repository: 10clouds/application
tag: latest
pullPolicy: IfNotPresent
service:
type: NodePort
port: 80
env:
DJANGO_DEBUG: ‘1’
…
…
…

6. 4 Words to know!
chart
templated K8S manifest
charts repository
registry of charts
+
chart + value = release
tiller
pod to manage releases
1 2
3 4

7. Manage charts
Install
$ helm install -n release-name -f values.yml ./application
LIST
$ helm list --all
NAME VERSION UPDATED STATUS CHART
release-name 1 10:00 21/03/2018 DEPLOYED application-1.0.0
production 44 09:15 21/03/2018 DELETED another_app-1.0.0
UPDATE
$ helm upgrade --recreate-pods -f values.yml --set image.tag=123 release-name ./application
ROLLBACK
$ helm rollback --recreate-pods release-name <version>

8. Why teams HELM?
● easy install
● app portability
● versionable
● easy rollbacks
● templatable
● better then kubectl apply -f

9. Q&A

10. THE END
Thank you for your attention!
Piotr Perzyna, 10Clouds