第154天学习打卡（Kubernetes 使用Helm快速部署应用， 如何自己创建Chart） (4)

3.安装mychart

 [root@master ~]# helm install web1 mychart/
 NAME: web1
 LAST DEPLOYED: Fri Jun 11 17:05:55 2021
 NAMESPACE: default
 STATUS: deployed
 REVISION: 1
 TEST SUITE: None
 [root@master ~]# kubectl get pods
 web1-6fbb48567f-ch86p                            1/1     Running            0         61s
 root@master ~]# kubectl get svc
 NAME             TYPE       CLUSTER-IP       EXTERNAL-IP   PORT(S)       AGE
 kubernetes       ClusterIP   10.96.0.1       <none>        443/TCP       5d20h
 ui3-weave-scope   NodePort    10.103.97.141   <none>        80:31674/TCP   53m
 web               NodePort    10.111.111.127   <none>        80:32079/TCP   20h
 web1             NodePort    10.96.150.188   <none>        80:31544/TCP   79s
 ​

4.应用升级

 helm upgrade chart名称  [root@master ~]# helm upgrade web1 mychart/
 Release "web1" has been upgraded. Happy Helming!
 NAME: web1
 LAST DEPLOYED: Fri Jun 11 17:12:01 2021
 NAMESPACE: default
 STATUS: deployed
 REVISION: 2
 TEST SUITE: None
 ​ 实现yaml高效复用

通过传递参数，动态渲染模板，yaml内容动态传入参数生成

在chart中有values.yaml文件，定义yaml文件全局变量

 [root@master mychart]# ls
 charts Chart.yaml templates values.yaml
 [root@master mychart]#
 ​

1.在values.yaml定义变量和值

2.在具体yaml文件中，获取定义变量值

yaml文件大体有几个地方不同

image

tag

label

port

replicas

一、在values.yaml定义变量和值

这个是原本文件里面的内容

 # Default values for mychart.
 # This is a YAML-formatted file.
 # Declare variables to be passed into your templates.
 ​
 replicaCount: 1
 ​
 image:
  repository: nginx
  pullPolicy: IfNotPresent
   # Overrides the image tag whose default is the chart appVersion.
  tag: ""
 ​
 imagePullSecrets: []
 nameOverride: ""
 fullnameOverride: ""
 ​
 serviceAccount:
   # Specifies whether a service account should be created
  create: true
   # Annotations to add to the service account
  annotations: {}
   # The name of the service account to use.
   # If not set and create is true, a name is generated using the fullname template
  name: ""
 ​
 podAnnotations: {}
 ​
 podSecurityContext: {}
   # fsGroup: 2000
 ​
 securityContext: {}
   # capabilities:
   #   drop:
   #   - ALL
   # readOnlyRootFilesystem: true
   # runAsNonRoot: true
   # runAsUser: 1000
 ​
 service:
  type: ClusterIP
  port: 80
 ​
 ingress:
  enabled: false
  className: ""
  annotations: {}
     # kubernetes.io/ingress.class: nginx
     # kubernetes.io/tls-acme: "true"
  hosts:
     - host: chart-example.local
      paths:
         - path: /
 ​  [root@master mychart]# vim values.yaml
 ​