ArgoCD 高级进阶 ApplicationSet【二】

高级进阶

将gitee 项目导入到 本地Gitlab仓库中-公开仓库
https://gitee.com/mageedu/spring-boot-helloworld-deployment.git

本地仓库路劲：
http://gitlab.gitlab.svc.cluster.local/root/spring-boot-helloworld-deployment.git

#资源定义
[root@xianchaomaster1 07-argocd-basics]# cat 01-application-helloworld.yaml
apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: spring-boot-helloworld
  namespace: argocd
spec:
  project: default
  source:
    repoURL: http://gitlab.gitlab.svc.cluster.local/root/spring-boot-helloworld-deployment.git
    targetRevision: HEAD
    path: deploy/kubernetes
  destination:
    server: https://kubernetes.default.svc
    namespace: helloworld
  syncPolicy:
    automated:
      prune: true
      selfHeal: true
      allowEmpty: false
    syncOptions:
    - Validate=false
    - CreateNamespace=true
    - PrunePropagationPolicy=foreground
    - PruneLast=true
    retry:
      limit: 5
      backoff:
        duration: 5s
        factor: 2
        maxDuration: 3m

#应用创建
[root@xianchaomaster1 07-argocd-basics]# kubectl apply -f 01-application-helloworld.yaml
application.argoproj.io/spring-boot-helloworld created
[root@xianchaomaster1 07-argocd-basics]# argocd app list
NAME                           CLUSTER                         NAMESPACE   PROJECT  STATUS  HEALTH   SYNCPOLICY  CONDITIONS  REPO                                                                               PATH               TARGET
argocd/guestbookcli            https://kubernetes.default.svc  guestbook   default  Synced  Healthy  Auto        <none>      http://gitlab.gitlab.svc.cluster.local/root/argocd-example-apps.git                guestbook
argocd/spring-boot-helloworld  https://kubernetes.default.svc  helloworld  default  Synced  Healthy  Auto-Prune  <none>      http://gitlab.gitlab.svc.cluster.local/root/spring-boot-helloworld-deployment.git  deploy/kubernetes  HEAD

Project CRD Application CRD

#Project CRD
Projects负责为Application提供逻辑分组，它主要实现如下功能
◼ 限制可以部署的内容（指定受信任的Git Source仓库）
◼ 限制Application可以部署到的目标位置（指定目标Cluster和Namespace）
◼ 限制能够及不能够部署的对象类型，例如RBAC、CRD、DeamonSets、NetworkPolicy等
◼ 定义Project Role，从而为Application提供RBAC机制，以绑定到OIDC组或JWT token
ArgoCD的默认项目
◼ default project由ArgoCD自动部署，它允许用户按需修改，但不能被删除

#关于ApplicaionSet CRD
ApplicationSet CRD
◼ ApplicationSet CRD用于定义可自动生成Application的模板，从而能够在monorepo（单个Repo中一义了多个
ArgoCD Application）或多个Repo，以及跨大量Cluster的场景中自动化管理ArgoCD Application
◼ ApplicationSet CRD需要同其专用的ApplicationSet控制器支撑实现
◆ApplicationSet控制器是ArgoCD的独立子项目，会随同ArgoCD一起部署
ApplicationSet可提供如下功能
◼ 目标Cluster的模板化，从而能够在单个资源配置文件中适配部署到多个Kubernetes集群
◼ 源Git配置仓库的模板化
◼ 较好地支持monorepo

 

ApplicationSet控制器的工作模式-示例

ApplicationSet 资源示例

#ApplicationSet控制器的工作模式
ApplicationSet控制器与Application控制器的交互方式
◼ ApplicationSet负责管理Application，因此，ApplicationSet控制器会生成或更新Application资源
◼ 生成或更新的Application资源则由Application控制器确保期望状态与实际状态的一致
◼ 因此，ApplicationSet控制器仅负责确保ApplicationSet资源的期望状态与实际状态的一致


#示例
helloworld ApplicationSet示例
       ◼ 使用了列表生成器（list generator）
              ◆有三个元素，分别为environment参数传递不同的值
              ◆该参数既作为配置文件获取位置，也是目标集群上的名称空间
       ◼ Application模板
              ◆给出了模板化的source
              ◆定义了模板化的destination
              ◆定义了共用的syncPolicy
       ◼ ApplicationSet的syncPolicy
              ◆preserveResourcesOnDeletion：是否在删除当前ApplicationSet资源时，一并删除由其创建的Application，即是否执行级联删除操作
目前，有七种不同的generator可用，常用的有如下4个
       ◼ List Generator
       ◼ Cluster Generator
       ◼ Git Generator
       ◼ Matrix Generator

[root@xianchaomaster1 07-argocd-basics]# cat 02-applicationset-demo.yaml
apiVersion: argoproj.io/v1alpha1
kind: ApplicationSet
metadata:
  name: helloworld
  namespace: argocd
spec:
  generators:
  - list:
      elements:
      - environment: dev
      - environment: staging
      - environment: prod
  template:
    metadata:
      name: '{{environment}}-sprint-boot-helloworld-xks'
    spec:
      project: default
      source:
        repoURL: http://gitlab.gitlab.svc.cluster.local/root/spring-boot-helloworld-deployment.git
        targetRevision: HEAD
        path: helloworld/{{environment}}
      destination:
        server: https://kubernetes.default.svc
        namespace: '{{environment}}'
      syncPolicy:
        automated:
          prune: true
          selfHeal: true
          allowEmpty: false
        syncOptions:
        - Validate=false
        - CreateNamespace=true
        - PrunePropagationPolicy=foreground
        - PruneLast=true
        retry:
          limit: 5
          backoff:
            duration: 5s
            factor: 2
            maxDuration: 3m
  syncPolicy:
    preserveResourcesOnDeletion: false

[root@xianchaomaster1 07-argocd-basics]# kubectl apply -f 02-applicationset-demo.yaml
applicationset.argoproj.io/helloworld created

[root@xianchaomaster1 07-argocd-basics]# argocd app list
NAME                                       CLUSTER                         NAMESPACE   PROJECT  STATUS  HEALTH   SYNCPOLICY  CONDITIONS  REPO                                                                               PATH                TARGET
argocd/dev-sprint-boot-helloworld-xks      https://kubernetes.default.svc  dev         default  Synced  Healthy  Auto-Prune  <none>      http://gitlab.gitlab.svc.cluster.local/root/spring-boot-helloworld-deployment.git  helloworld/dev      HEAD
argocd/guestbookcli                        https://kubernetes.default.svc  guestbook   default  Synced  Healthy  Auto        <none>      http://gitlab.gitlab.svc.cluster.local/root/argocd-example-apps.git                guestbook
argocd/prod-sprint-boot-helloworld-xks     https://kubernetes.default.svc  prod        default  Synced  Healthy  Auto-Prune  <none>      http://gitlab.gitlab.svc.cluster.local/root/spring-boot-helloworld-deployment.git  helloworld/prod     HEAD
argocd/spring-boot-helloworld              https://kubernetes.default.svc  helloworld  default  Synced  Healthy  Auto-Prune  <none>      http://gitlab.gitlab.svc.cluster.local/root/spring-boot-helloworld-deployment.git  deploy/kubernetes   HEAD
argocd/staging-sprint-boot-helloworld-xks  https://kubernetes.default.svc  staging     default  Synced  Healthy  Auto-Prune  <none>      http://gitlab.gitlab.svc.cluster.local/root/spring-boot-helloworld-deployment.git  helloworld/staging  HEAD