Application

The Application custom resource enables features such as branding, release notes, port forwarding, dashboard buttons, app status indicators, and custom graphs.

There is some overlap between the Application custom resource manifest file and the Kubernetes SIG Application custom resource. For example, enabling features such as adding a button to the dashboard requires the use of both the Application and SIG Application custom resources.

The following is an example manifest file for the Application custom resource:

apiVersion: kots.io/v1beta1
kind: Application
metadata:
  name: my-application
spec:
  title: My Application
  icon: https://support.io/img/logo.png
  releaseNotes: These are our release notes
  allowRollback: false
  targetKotsVersion: "1.60.0"
  minKotsVersion: "1.40.0"
  requireMinimalRBACPrivileges: false
  additionalImages:
    - jenkins/jenkins:lts
  additionalNamespaces:
    - "*"
  ports:
    - serviceName: web
      servicePort: 9000
      localPort: 9000
      applicationUrl: "http://web"
  statusInformers:
    - deployment/my-web-svc
    - deployment/my-worker
  graphs:
    - title: User Signups
      query: 'sum(user_signup_events_total)'

title

Description	The application title. Used on the license upload and in various places in the Replicated Admin Console.
Example	title: My Application
Supports Go templates?	No
Supported for Embedded Cluster?	Yes

icon

Description	The icon file for the application. Used on the license upload, in various places in the Admin Console, and in the Download Portal. The icon can be a remote URL or a Base64 encoded image. Base64 encoded images are required to display the image in air gap installations with no outbound internet access.
Example	icon: https://support.io/img/logo.png
Supports Go templates?	No
Supported for Embedded Cluster?	Yes

releaseNotes

Description	The release notes for this version. These can also be set when promoting a release.
Example	releaseNotes: Fixes a bug and adds a new feature.
Supports Go templates?	No
Supported for Embedded Cluster?	Yes

allowRollback

Description	Enable this flag to create a Rollback button on the Admin Console Version History page. If an application is guaranteed not to introduce backwards-incompatible versions, such as through database migrations, then the allowRollback flag can allow end users to easily roll back to previous versions from the Admin Console. Rollback does not revert any state. Rather, it recovers the YAML manifests that are applied to the cluster.
Example	allowRollback: false
Default	false
Supports Go templates?	No
Supported for Embedded Cluster?	No. allowRollback is not supported because Embedded Cluster does not support rolling back or downgrading.

additionalNamespaces

Description	An array of additional namespaces as strings that Replicated KOTS creates on the cluster. For more information, see Defining Additional Namespaces. In addition to creating the additional namespaces, KOTS ensures that the application secret exists in the namespaces. KOTS also ensures that this application secret has access to pull the application images, including both images that are used and any images you add in the additionalImages field. This pull secret is automatically added to all manifest files that use private images. For dynamically created namespaces, specify "*".
Example	additionalNamespaces: - "*"
Supports Go templates?	No
Supported for Embedded Cluster?	Yes

additionalImages

Description	An array of strings that reference images to be included in air gap bundles and pushed to the local registry during installation. KOTS detects images from the PodSpecs in the application. Some applications, such as Operators, might need to include additional images that are not referenced until runtime. For more information, see Defining Additional Images.
Example	additionalImages: - jenkins/jenkins:lts
Supports Go templates?	No
Supported for Embedded Cluster?	Yes

requireMinimalRBACPrivileges

Description	requireMinimalRBACPrivileges applies to existing clusters only. Requires minimal role-based access control (RBAC) be used for all customer installations. When set to true, KOTS creates a namespace-scoped Role and RoleBinding, instead of the default cluster-scoped ClusterRole and ClusterRoleBinding. For additional requirements and limitations related to using namespace-scoped RBAC, see About Namespace-scoped RBAC in Configuring KOTS RBAC.
Example	requireMinimalRBACPrivileges: false
Default	false
Supports Go templates?	No
Supported for Embedded Cluster?	No

supportMinimalRBACPrivileges

Description	supportMinimalRBACPrivileges applies to existing clusters only. Allows minimal role-based access control (RBAC) be used for all customer installations. When set to true, KOTS supports creating a namespace-scoped Role and RoleBinding, instead of the default cluster-scoped ClusterRole and ClusterRoleBinding. Minimal RBAC is not used by default. It is only used when the --use-minimal-rbac flag is passed to the kots install command. For additional requirements and limitations related to using namespace-scoped RBAC, see About Namespace-scoped RBAC in Configuring KOTS RBAC.
Example	supportMinimalRBACPrivileges: true
Default	false
Supports Go templates?	No
Supported for Embedded Cluster?	No

ports

Description	Extra ports (additional to the 8800 Admin Console port) that are port-forwarded when running the kubectl kots admin-console command. With ports specified, KOTS can establish port forwarding to simplify connections to the deployed application. When the application starts and the service is ready, the KOTS CLI will print a message in the terminal with the URL where the port-forwarded service can be accessed. For more information, see Port Forwarding Services with KOTS. note KOTS does not automatically create port forwards for installations on VMs or bare metal servers with Replicated Embedded Cluster or Replicated kURL. This is because it cannot be verified that the ports are secure and authenticated. Instead, Embedded Cluster or kURL creates a NodePort service to make the Admin Console accessible on a port on the node (port 8800 for kURL or port 30000 for Embedded Cluster). You can expose additional ports on the node for Embedded Cluster or kURL installations by creating NodePort services. For more information, see Exposing Services Using NodePorts. The ports key has the following fields: ports.serviceName: The name of the service that receives the traffic. ports.servicePort: The containerPort of the Pod where the service is running. note Ensure that you use the containerPort and not the servicePort. The containerPort and servicePort are often the same port, though it is possible that they are different. ports.localPort: The port to map on the local workstation. (Optional) ports.applicationUrl: When set to the same URL that is specified in the descriptor.links.url field of the Kubernetes SIG Application custom resource, KOTS adds a link on the Admin Console dashboard where the given service can be accessed. This process automatically links to the hostname in the browser (where the Admin Console is being accessed) and appends the specified localPort. If not set, then the URL defined in the descriptor.links.url field of the Kubernetes SIG Application is linked on the Admin Console dashboard. For more information about adding links to port forwarded services, see Add a Link to a Port-Forwarded Service in the Admin Console.
Example	ports: - serviceName: web servicePort: 9000 localPort: 9000 applicationUrl: "http://web"
Supports Go templates?	Go templates are supported in the serviceName and applicationUrl fields only. Using Go templates in the localPort or servicePort fields results in an installation error similar to the following: json: cannot unmarshal string into Go struct field ApplicationPort.spec.ports.servicePort of type int.
Supported for Embedded Cluster?	Yes

statusInformers

Description	Resources to watch and report application status back to the user. When you include statusInformers, the dashboard can indicate when the application deployment is complete and the application is ready for use. statusInformers use the format [namespace/]type/name, where namespace is optional. For more information about including statusInformers, see Adding Resource Status Informers.
Example	statusInformers: - deployment/my-web-svc - deployment/my-worker The following example shows excluding a specific status informer based on a user-supplied value from the Admin Console Configuration screen: statusInformers: - deployment/my-web-svc - '{{repl if ConfigOptionEquals "option" "value"}}deployment/my-worker{{repl else}}{{repl end}}'
Supports Go templates?	Yes
Supported for Embedded Cluster?	Yes

graphs

Description	Custom graphs to include on the Admin Console application dashboard.For more information about how to create custom graphs, see Adding Custom Graphs. graphs has the following fields: graphs.title: The graph title. graphs.query: The Prometheus query. graphs.legend: The legend to use for the query line. You can use Prometheus templating in the legend fields with each element returned from the Prometheus query. The template escape sequence is {{}}. Use {{ value }}. For more information, see Template Reference in the Prometheus documentation. graphs.queries: A list of queries containing a query and legend. graphs.yAxisFormat: The format of the Y axis labels with support for all Grafana units. For more information, see Visualizations in the Grafana documentation. graphs.yAxisTemplate: Y axis labels template.
Example	graphs: - title: User Signups query: 'sum(user_signup_events_total)'
Supports Go templates?	Yes
Supported for Embedded Cluster?	No

proxyRegistryDomain

important

proxyRegistryDomain is deprecated. For information about how to use a custom domain for the Replicated proxy registry, see Using Custom Domains.

Description	The custom domain used for proxy.replicated.com. For more information, see Using Custom Domains. Introduced in KOTS v1.91.1.
Example	proxyRegistryDomain: "proxy.mycompany.com"
Supports Go templates?	No

replicatedRegistryDomain

important

replicatedRegistryDomain is deprecated. For information about how to use a custom domain for the Replicated registry, see Using Custom Domains.

Description	The custom domain used for registry.replicated.com. For more information, see Using Custom Domains. Introduced in KOTS v1.91.1.
Example	replicatedRegistryDomain: "registry.mycompany.com"
Supports Go templates?	No
Supported for Embedded Cluster?	Yes

targetKotsVersion

Description	The KOTS version that is targeted by the release. For more information, see Setting Minimum and Target Versions for KOTS.
Example	targetKotsVersion: "1.85.0"
Supports Go templates?	No
Supported for Embedded Cluster?	No. Setting targetKotsVersion to a version earlier than the KOTS version included in the specified version of Embedded Cluster will cause Embedded Cluster installations to fail with an error message like: Error: This version of App Name requires a different version of KOTS from what you currently have installed.. To avoid installation failures, do not use targetKotsVersion in releases that support installation with Embedded Cluster.

minKotsVersion (Beta)

Description	The minimum KOTS version that is required by the release. For more information, see Setting Minimum and Target Versions for KOTS.
Example	minKotsVersion: "1.71.0"
Supports Go templates?	No
Supported for Embedded Cluster?	No. Setting minKotsVersion to a version later than the KOTS version included in the specified version of Embedded Cluster will cause Embedded Cluster installations to fail with an error message like: Error: This version of App Name requires a different version of KOTS from what you currently have installed.. To avoid installation failures, do not use minKotsVersion in releases that support installation with Embedded Cluster.