Argo CD app of apps

一、什么是App Of Apps

• 你可以创建一个应用程序来创建其他应用程序，而其他应用程序又可以创建其他应用程序。这允许你以声明方式管理一组可以协同部署和配置的应用程序。这就是App Of Apps
• 官方文档：https://argo-cd.readthedocs.io/en/stable/operator-manual/declarative-setup/#app-of-apps

1.1、创建App Of Apps

# 项目结构
[root@master gitops-appofapps]# tree
.
├── application1
│   ├── deploy_nginx.yaml
│   └── service_nginx.yaml
├── application2
│   ├── deploy_httpd.yaml
│   └── service_httpd.yaml
├── application3
│   ├── deploy_tomcat.yaml
│   └── service_tomcat.yaml
├── apps
│   ├── application1.yaml
│   ├── application2.yaml
│   └── application3.yaml
└── root-app
    └── root-application.yaml

5 directories, 10 files

• 项目仓库：https://gitee.com/wzhcjt/argo-cd-apps.git

• 新建root-application.yaml

[root@master root-app]# cat root-application.yaml 
apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: root-application
  namespace: argocd
spec:
  project: default
  source:
    repoURL: http://192.168.93.102/root/gitops-appofapps.git
    targetRevision: main
    path: apps
    # directory
    directory:
      recurse: false
  destination:
    server: https://192.168.93.145:6443
    namespace: default

1.2、创建子项目app

• application1

[root@master apps]# cat application1.yaml 
apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: application1
  namespace: argocd
spec:
  destination:
    namespace: application1
    server: https://192.168.93.145:6443
  project: default
  source:
    path: application1
    repoURL: http://192.168.93.102/root/gitops-appofapps.git
    targetRevision: main
    directory:
      recurse: true
  syncPolicy:
    syncOptions:
      - CreateNamespace=true

• application2

[root@master apps]# cat application2.yaml 
apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: application2
  namespace: argocd
spec:
  destination:
    namespace: application2
    server: https://192.168.93.145:6443
  project: default
  source:
    path: application2
    repoURL: http://192.168.93.102/root/gitops-appofapps.git
    targetRevision: main
    directory:
      recurse: true
  syncPolicy:
    syncOptions:
      - CreateNamespace=true

• application3

[root@master apps]# cat application3.yaml 
apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: application3
  namespace: argocd
spec:
  destination:
    namespace: application3
    server: https://192.168.93.145:6443
  project: default
  source:
    path: application3
    repoURL: http://192.168.93.102/root/gitops-appofapps.git
    targetRevision: main
    directory:
      recurse: true
  syncPolicy:
    syncOptions:
      - CreateNamespace=true

1.3、创建部署资源清单

• application1

[root@master gitops-appofapps]# ls application1
deploy_nginx.yaml  service_nginx.yaml

• application2

[root@master gitops-appofapps]# ls application2
deploy_httpd.yaml  service_httpd.yaml

• application3

[root@master gitops-appofapps]# ls application3
deploy_tomcat.yaml  service_tomcat.yaml

1.4、创建Application

[root@master gitops-appofapps]# cd root-app/
[root@master root-app]# kubectl apply -f root-application.yaml 
application.argoproj.io/root-application created

1.5、Web UI界面查看

• 点击SYNC
  

• 点击SYNC按钮同步后，自动新建了3个Application服务
  

• 3个Application服务分别点击SYNC按钮进行同步
  

• 使用kubectl查看集群详细信息

# 查看 Namespace
[root@master root-app]# kubectl get ns
NAME              STATUS   AGE
application1      Active   12m
application2      Active   12m
application3      Active   12m
argocd            Active   43m
default           Active   28d
ingress-nginx     Active   41m
kube-node-lease   Active   28d
kube-public       Active   28d
kube-system       Active   28d

# 查看 3 个 Application服务状态
[root@master root-app]# kubectl get pod,svc -n application1
NAME                                    READY   STATUS    RESTARTS   AGE
pod/nginx-deployment-54b6f7ddf9-kfzqd   1/1     Running   0          13m

NAME            TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)   AGE
service/nginx   ClusterIP   10.107.128.102   <none>        801/TCP   13m
[root@master root-app]# kubectl get pod,svc -n application2
NAME                                    READY   STATUS    RESTARTS   AGE
pod/httpd-deployment-5fcbcd9667-g8dct   1/1     Running   0          13m

NAME            TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)   AGE
service/httpd   ClusterIP   10.111.121.145   <none>        802/TCP   13m
[root@master root-app]# kubectl get pod,svc -n application3
NAME                                     READY   STATUS    RESTARTS   AGE
pod/tomcat-deployment-865c47d857-26tbn   1/1     Running   0          13m

NAME             TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)   AGE
service/tomcat   ClusterIP   10.105.167.20   <none>        803/TCP   13m