DevOps: What is Helm?

1# Commands
2helm create mychart
3helm install myapp ./mychart
4helm upgrade myapp ./mychart --set replicas=3
5helm uninstall myapp
6helm list
7helm history myapp
8helm rollback myapp 1

1# Chart.yaml
2apiVersion: v2
3name: mychart
4version: 0.1.0
5
6# values.yaml
7replicaCount: 2
8image:
9  repository: nginx
10  tag: "1.19"
11service:
12  type: ClusterIP
13  port: 80
14
15# templates/deployment.yaml
16apiVersion: apps/v1
17kind: Deployment
18metadata:
19  name: {{ .Release.Name }}
20spec:
21  replicas: {{ .Values.replicaCount }}
22  template:
23    spec:
24      containers:
25      - name: {{ .Release.Name }}
26        image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"