k8s笔记7.4--helm构建无端口类型chart
介绍
helm create chartName 后,默认创建了一个web类型的应用,而且配置了service 和 端口探测;如果直接更换为无端口的worker 类型应用,那么部署就报错了。因此需要调整helm chart文件,是指无端口和service 配置,然后再打包部署。
本文以busybox 为例,打包一个无端口的helm chart,并部署到 k8s 中。
无端口chart
- 创建chart
helm create xg-busybox
- 清理无用的配置项
- values.yaml 中设置ingress 为false
- eployment.yaml 中去掉端口相关的配置 containers.ports
- 去掉配置文件 service.yaml
values.yaml
replicaCount: 1
image:
repository: registry-vpc.cn-shanghai.aliyuncs.com/yourNamespace/busybox
pullPolicy: IfNotPresent
# Overrides the image tag whose default is the chart appVersion.
tag: busybox_1.31
imagePullSecrets: [{"name": "regcred"}]
nameOverride: ""
fullnameOverride: ""
serviceAccount:
create: true
annotations: {}
name: ""
podAnnotations: {}
podSecurityContext: {}
# fsGroup: 2000
securityContext: {}
service:
type: ClusterIP
port: 80
ingress:
enabled: false
className: ""
annotations: {}
hosts:
- host: chart-example.local
paths:
- path: /
pathType: ImplementationSpecific
tls: []
resources: {}
autoscaling:
enabled: false
minReplicas: 1
maxReplicas: 100
targetCPUUtilizationPercentage: 80
nodeSelector: {}
tolerations: []
affinity: {}
vim templates/deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: {{ include "xg-busybox.fullname" . }}
labels:
{{- include "xg-busybox.labels" . | nindent 4 }}
spec:
{{- if not .Values.autoscaling.enabled }}
replicas: {{ .Values.replicaCount }}
{{- end }}
selector:
matchLabels:
{{- include "xg-busybox.selectorLabels" . | nindent 6 }}
template:
metadata:
{{- with .Values.podAnnotations }}
annotations:
{{- toYaml . | nindent 8 }}
{{- end }}
labels:
{{- include "xg-busybox.selectorLabels" . | nindent 8 }}
spec:
{{- with .Values.imagePullSecrets }}
imagePullSecrets:
{{- toYaml . | nindent 8 }}
{{- end }}
serviceAccountName: {{ include "xg-busybox.serviceAccountName" . }}
securityContext:
{{- toYaml .Values.podSecurityContext | nindent 8 }}
containers:
- name: {{ .Chart.Name }}
securityContext:
{{- toYaml .Values.securityContext | nindent 12 }}
image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
command: [sh, -c, 'sleep infinity']
imagePullPolicy: {{ .Values.image.pullPolicy }}
resources:
{{- toYaml .Values.resources | nindent 12 }}
{{- with .Values.nodeSelector }}
nodeSelector:
{{- toYaml . | nindent 8 }}
{{- end }}
{{- with .Values.affinity }}
affinity:
{{- toYaml . | nindent 8 }}
{{- end }}
{{- with .Values.tolerations }}
tolerations:
{{- toYaml . | nindent 8 }}
{{- end }}
- 打包部署
# helm push xg-busybox/ bigdata-apps
# helm repo update
# helm upgrade xg-busybox-dev bigdata-apps/xg-busybox -f xg-busybox/dev-values.yaml --set=image.tag=busybox_1.31 -n sre-test
# helm list -A|grep xg-busybox
xg-busybox-dev sre-test 2 2021-08-21 17:09:41.318788496 +0800 CST deployed xg-busybox-0.1.4 1.31
此时可以发现已经正常更新服务 xg-busybox-dev了。
注意事项
- helm 打包无端口的服务一定要去掉service.yaml, 且需要关闭端口和服务相关的配置。
- 实际部署的时候最好区分 dev-values.yaml(开发测试环境) 和 prod-values.yaml(生产环境),以达到一个chart 匹配多种环境的目的。
说明
helm 版本 v3.6.1
helm 官方文档