application.yaml

apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: guestbook
  # You'll usually want to add your resources to the argocd namespace.
  namespace: argocd
  # Add this finalizer ONLY if you want these to cascade delete.
  finalizers:
    # The default behaviour is foreground cascading deletion
    - resources-finalizer.argocd.argoproj.io
    # Alternatively, you can use background cascading deletion
    # - resources-finalizer.argocd.argoproj.io/background
  # Add labels to your application object.
  labels:
    name: guestbook
spec:
  # The project the application belongs to.
  project: default

  # Source of the application manifests
  source:
    repoURL: https://github.com/argoproj/argocd-example-apps.git  # Can point to either a Helm chart repo or a git repo.
    targetRevision: HEAD  # For Helm, this refers to the chart version.
    path: guestbook  # This has no meaning for Helm charts pulled directly from a Helm repo instead of git.

    # helm specific config
    chart: chart-name  # Set this when pulling directly from a Helm repo. DO NOT set for git-hosted Helm charts.
    helm:
      passCredentials: false # If true then adds --pass-credentials to Helm commands to pass credentials to all domains
      # Extra parameters to set (same as setting through values.yaml, but these take precedence)
      parameters:
      - name: "nginx-ingress.controller.service.annotations.external-dns\\.alpha\\.kubernetes\\.io/hostname"
        value: mydomain.example.com
      - name: "ingress.annotations.kubernetes\\.io/tls-acme"
        value: "true"
        forceString: true # ensures that value is treated as a string

      # Use the contents of files as parameters (uses Helm's --set-file)
      fileParameters:
      - name: config
        path: files/config.json

      # Release name override (defaults to application name)
      releaseName: guestbook

      # Helm values files for overriding values in the helm chart
      # The path is relative to the spec.source.path directory defined above
      valueFiles:
      - values-prod.yaml

      # Ignore locally missing valueFiles when installing Helm chart. Defaults to false
      ignoreMissingValueFiles: false

      # Values file as block file. Prefer to use valuesObject if possible (see below)
      values: |
        ingress:
          enabled: true
          path: /
          hosts:
            - mydomain.example.com
          annotations:
            kubernetes.io/ingress.class: nginx
            kubernetes.io/tls-acme: "true"
          labels: {}
          tls:
            - secretName: mydomain-tls
              hosts:
                - mydomain.example.com

      # Values file as block file. This takes precedence over values
      valuesObject:
        ingress:
          enabled: true
          path: /
          hosts:
            - mydomain.example.com
          annotations:
            kubernetes.io/ingress.class: nginx
            kubernetes.io/tls-acme: "true"
          labels: {}
          tls:
            - secretName: mydomain-tls
              hosts:
                - mydomain.example.com

      # Skip custom resource definition installation if chart contains custom resource definitions. Defaults to false
      skipCrds: false

      # Optional Helm version to template with. If omitted it will fall back to look at the 'apiVersion' in Chart.yaml
      # and decide which Helm binary to use automatically. This field can be either 'v2' or 'v3'.
      version: v2

      # You can specify the Kubernetes API version to pass to Helm when templating manifests. By default, Argo CD uses
      # the Kubernetes version of the target cluster. The value must be semver formatted. Do not prefix with `v`.
      kubeVersion: 1.30.0

      # You can specify the Kubernetes resource API versions to pass to Helm when templating manifests. By default, Argo
      # CD uses the API versions of the target cluster. The format is [group/]version/kind.
      apiVersions:
        - traefik.io/v1alpha1/TLSOption
        - v1/Service

      # Optional namespace to template with. If left empty, defaults to the app's destination namespace.
      namespace: custom-namespace

    # kustomize specific config
    kustomize:
      # Optional kustomize version. Note: version must be configured in argocd-cm ConfigMap
      version: v3.5.4
      # Supported kustomize transformers. https://kubectl.docs.kubernetes.io/references/kustomize/kustomization/
      namePrefix: prod-
      nameSuffix: -some-suffix
      commonLabels:
        foo: bar
      commonAnnotations:
        beep: boop-${ARGOCD_APP_REVISION}
      # Toggle which enables/disables env variables substitution in commonAnnotations
      commonAnnotationsEnvsubst: true
      forceCommonLabels: false
      forceCommonAnnotations: false
      images:
      - gcr.io/heptio-images/ks-guestbook-demo:0.2
      - my-app=gcr.io/my-repo/my-app:0.1
      namespace: custom-namespace
      replicas:
      - name: kustomize-guestbook-ui
        count: 4
      components:
        - ../component  # relative to the kustomization.yaml (`source.path`).
      patches:
        - target:
            kind: Deployment
            name: guestbook-ui
          patch: |-
            - op: add # Add new element to manifest
              path: /spec/template/spec/nodeSelector/
              value:
                env: "pro"

      # You can specify the Kubernetes API version to pass to Helm when templating manifests. By default, Argo CD uses
      # the Kubernetes version of the target cluster. The value must be semver formatted. Do not prefix with `v`.
      kubeVersion: 1.30.0

      # You can specify the Kubernetes resource API versions to pass to Helm when templating manifests. By default, Argo
      # CD uses the API versions of the target cluster. The format is [group/]version/kind.
      apiVersions:
        - traefik.io/v1alpha1/TLSOption
        - v1/Service

    # directory
    directory:
      recurse: true
      jsonnet:
        # A list of Jsonnet External Variables
        extVars:
        - name: foo
          value: bar
          # You can use "code" to determine if the value is either string (false, the default) or Jsonnet code (if code is true).
        - code: true
          name: baz
          value: "true"
        # A list of Jsonnet Top-level Arguments
        tlas:
        - code: false
          name: foo
          value: bar
      # Exclude contains a glob pattern to match paths against that should be explicitly excluded from being used during
      # manifest generation. This takes precedence over the `include` field.
      # To match multiple patterns, wrap the patterns in {} and separate them with commas. For example: '{config.yaml,env-use2/*}'
      exclude: 'config.yaml'
      # Include contains a glob pattern to match paths against that should be explicitly included during manifest
      # generation. If this field is set, only matching manifests will be included.
      # To match multiple patterns, wrap the patterns in {} and separate them with commas. For example: '{*.yml,*.yaml}'
      include: '*.yaml'

    # plugin specific config
    plugin:
      # If the plugin is defined as a sidecar and name is not passed, the plugin will be automatically matched with the
      # Application according to the plugin's discovery rules.
      name: mypluginname
      # environment variables passed to the plugin
      env:
        - name: FOO
          value: bar
      # Plugin parameters are new in v2.5.
      parameters:
        - name: string-param
          string: example-string
        - name: array-param
          array: [item1, item2]
        - name: map-param
          map:
            param-name: param-value
  
  # Sources field specifies the list of sources for the application
  sources:
    - repoURL: https://github.com/argoproj/argocd-example-apps.git  # Can point to either a Helm chart repo or a git repo.
      targetRevision: HEAD  # For Helm, this refers to the chart version.
      path: guestbook  # This has no meaning for Helm charts pulled directly from a Helm repo instead of git.
      ref: my-repo  # For Helm, acts as a reference to this source for fetching values files from this source. Has no meaning when under `source` field

  # Destination cluster and namespace to deploy the application
  destination:
    # cluster API URL
    server: https://kubernetes.default.svc
    # or cluster name
    # name: in-cluster
    # The namespace will only be set for namespace-scoped resources that have not set a value for .metadata.namespace
    namespace: guestbook
    
  # Extra information to show in the Argo CD Application details tab
  info:
    - name: 'Example:'
      value: 'https://example.com'
      
  # Sync policy
  syncPolicy:
    automated: # automated sync by default retries failed attempts 5 times with following delays between attempts ( 5s, 10s, 20s, 40s, 80s ); retry controlled using `retry` field.
      prune: true # Specifies if resources should be pruned during auto-syncing ( false by default ).
      selfHeal: true # Specifies if partial app sync should be executed when resources are changed only in target Kubernetes cluster and no git change detected ( false by default ).
      allowEmpty: false # Allows deleting all application resources during automatic syncing ( false by default ).
    syncOptions:     # Sync options which modifies sync behavior
    - Validate=false # disables resource validation (equivalent to 'kubectl apply --validate=false') ( true by default ).
    - CreateNamespace=true # Namespace Auto-Creation ensures that namespace specified as the application destination exists in the destination cluster.
    - PrunePropagationPolicy=foreground # Supported policies are background, foreground and orphan.
    - PruneLast=true # Allow the ability for resource pruning to happen as a final, implicit wave of a sync operation
    - RespectIgnoreDifferences=true # When syncing changes, respect fields ignored by the ignoreDifferences configuration
    - ApplyOutOfSyncOnly=true # Only sync out-of-sync resources, rather than applying every object in the application
    managedNamespaceMetadata: # Sets the metadata for the application namespace. Only valid if CreateNamespace=true (see above), otherwise it's a no-op.
      labels: # The labels to set on the application namespace
        any: label
        you: like
      annotations: # The annotations to set on the application namespace
        the: same
        applies: for
        annotations: on-the-namespace

    # The retry feature is available since v1.7
    retry:
      limit: 5 # number of failed sync attempt retries; unlimited number of attempts if less than 0
      backoff:
        duration: 5s # the amount to back off. Default unit is seconds, but could also be a duration (e.g. "2m", "1h")
        factor: 2 # a factor to multiply the base duration after each failed retry
        maxDuration: 3m # the maximum amount of time allowed for the backoff strategy

  # Will ignore differences between live and desired states during the diff. Note that these configurations are not
  # used during the sync process unless the `RespectIgnoreDifferences=true` sync option is enabled.
  ignoreDifferences:
  # for the specified json pointers
  - group: apps
    kind: Deployment
    jsonPointers:
    - /spec/replicas
  - kind: ConfigMap
    jqPathExpressions:
    - '.data["config.yaml"].auth'
  # for the specified managedFields managers
  - group: "*"
    kind: "*"
    managedFieldsManagers:
    - kube-controller-manager
    # Name and namespace are optional. If specified, they must match exactly, these are not glob patterns.
    name: my-deployment
    namespace: my-namespace

  # RevisionHistoryLimit limits the number of items kept in the application's revision history, which is used for
  # informational purposes as well as for rollbacks to previous versions. This should only be changed in exceptional
  # circumstances. Setting to zero will store no history. This will reduce storage used. Increasing will increase the
  # space used to store the history, so we do not recommend increasing it.
  revisionHistoryLimit: 10