Gitops and ArgoCD: Tracking Image Changes

This article was written following the successful completion of the Kubernetes-based Infrastructure Platform course

Gitops - , infrastracture as a code - .   CNCF - ArgoCD Flux. - git kubernetes. ,  , Flux  :

• ;

  
  
  
  
  

• - .

  
  
  
  
  

ArgoCD . ,    :

:

• , git , , , , , (   , );

  
  
  
  
  

• (Kustomize, Helm, Ksonnet, Jsonnet, plain-YAML);

  
  
  
  
  

• , ;

  
  
  
  
  

• .

  
  
  
  
  

  :

kubernetes , . , CI container registry , , , CD.   ,  ArgoCD , helm . - , ArgoCD , , ?

flux:

helm , - helmrelease. container registry helmrelease ,   semver :

apiVersion: helm.fluxcd.io/v1
kind: HelmRelease
metadata:
  name: frontend
  namespace: microservices-demo
  annotations:
    fluxcd.io/ignore: "false"
    fluxcd.io/automated: "true"
    flux.weave.works/tag.chart-image: semver:~v0.0
spec:
  releaseName: frontend
  helmVersion: v3
  chart:
    git: git@gitlab.com:wenger23/microservices-demo.git
    ref: master
    path: deploy/charts/frontend
  values:
    image:
      repository: registry.gitlab.com/wenger23/microservices-demo/frontend
      tag: v0.0.40
    imagePullSecrets:
    - name: registry-credentials
      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

  Flux container registry ,   - !

  . , git - helm, , flux,   merge .

ArgoCD , , . - - Argo CD Image Updater. , ArgoCD   container registry, .    :

• container registry ( );

  
  
  
  
  

• , c ;

  
  
  
  
  

• .

  
  
  
  
  

:

•   ArgoCD;

  
  
  
  
  

• Helm Kustomize, , helm - image.tag ( ).

  
  
  
  
  

  - ArgoCD, namespace( ). .     applications ( ArgoCD)  : :

   argocd-image-updater.argoproj.io/image-list: <image_spec_list>

- container registry , :

argocd-image-updater.argoproj.io/image-list: frontend:~v0.0

v0.0

semver ,   :

argocd-image-updater.argoproj.io/<image_name>.update-strategy: <strategy>

, application ( ) :

• -  ArgoCD api ( );

  
  
  
  
  

• - ;.

  
  
  
  
  

argocd app set --parameter



, ArgoCD.    webui. .

- :

argocd-image-updater.argoproj.io/write-back-method: git

, .argocd-source-<appName>.yaml, :

flux ,   , merge .   argocd image updater ArgoCD, credentials.

ArgoCD argocd image updater :

apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  annotations:
    argocd-image-updater.argoproj.io/image-list: registry.gitlab.com/microservices28/frontend:~v0.0
    argocd-image-updater.argoproj.io/write-back-method:  git
  name: frontend
  namespace: argocd
spec:
  destination:
    namespace: microservices28
    server: https://kubernetes.default.svc
  project: microservices
  source:
    helm:
      valueFiles:
      - values.yaml
    path: deploy/charts/frontend
    repoURL: https://gitlab.com/microservices28/frontend.git
      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

:

, CD .Argo CD Image Updater  - 0.9.2 ,. 1.0. , .

:

Flux;

ArgoCD;

Argocd image updater.