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

1. 创建chart

   helm create xg-busybox
   

2. 清理无用的配置项
   1. values.yaml 中设置ingress 为false
   2. eployment.yaml 中去掉端口相关的配置 containers.ports
   3. 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 }}
   

3. 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

1. 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。
2. 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