The Topology plugin enables you to visualize the workloads such as Deployment, Job, Daemonset, Statefulset, CronJob, Pods and Virtual Machines powering any service on the Kubernetes cluster.
- The Kubernetes backend plugin
@backstage/plugin-kubernetes-backend
is installed and configured by following the installation and configuration guides. - The Kubernetes plugin is configured and connects to the cluster using a
ServiceAccount
. - The
ClusterRole
must be granted toServiceAccount
accessing the cluster. If you have the Backstage Kubernetes plugin configured, then theClusterRole
is already granted.
Tip: You can use the prepared manifest for a read-only
ClusterRole
, providing access for both Kubernetes plugin and Topology plugin.
-
Ensure that read access is granted to the
routes
resource in theClusterRole
. You can use the following code to do so:apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRole metadata: name: backstage-read-only rules: ... - apiGroups: - route.openshift.io resources: - routes verbs: - get - list
-
The following must be added in
kubernetes.customResources
property in theapp-config.yaml
file to view the OpenShift route as well:kubernetes: ... customResources: - group: 'route.openshift.io' apiVersion: 'v1' plural: 'routes'
The following permission must be granted to the ClusterRole
to be able to view the pod logs:
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: backstage-read-only
rules:
...
- apiGroups:
- ''
resources:
- pods
- pods/log
verbs:
- get
- list
- watch
-
Ensure that read access is granted to the Pipelines, PipelineRuns, and TaskRuns resource in the
ClusterRole
. You can use the following code to do so:... apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRole metadata: name: backstage-read-only rules: ... - apiGroups: - tekton.dev resources: - pipelines - pipelineruns - taskruns verbs: - get - list
-
The following code must be added to the
kubernets.customResources
property in theapp-config.yaml
file to view the Tekton PipelineRuns list in the side panel and to view the latest PipelineRun status in the Topology node decorator:kubernetes: ... customResources: - group: 'tekton.dev' apiVersion: 'v1' plural: 'pipelines' - group: 'tekton.dev' apiVersion: 'v1' plural: 'pipelineruns' - group: 'tekton.dev' apiVersion: 'v1' plural: 'taskruns'
-
OpenShift Virtualization Operator is installed and configured on a Kubernetes cluster.
-
Ensure that read access is granted to the VirtualMachines resource in the
ClusterRole
. You can use the following code to do so:... apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRole metadata: name: backstage-read-only rules: ... - apiGroups: - kubevirt.io resources: - virtualmachines - virtualmachineinstances verbs: - get - list
-
The following code must be added to the
kubernetes.customResources
property in theapp-config.yaml
file to view the VirtualMachine nodes on the topology plugin:kubernetes: ... customResources: - group: 'kubevirt.io' apiVersion: 'v1' plural: 'virtualmachines' - group: 'kubevirt.io' apiVersion: 'v1' plural: 'virtualmachineinstances'
-
Ensure that read access is granted to the
CheClusters
resource in theClusterRole
as shown in the following example code:... apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRole metadata: name: backstage-read-only rules: ... - apiGroups: - org.eclipse.che resources: - checlusters verbs: - get - list
-
The following configuration must be added in the
kubernetes.customResources
property in theapp-config.yaml
file to use the Source Code Editor:kubernetes: ... customResources: - group: 'org.eclipse.che' apiVersion: 'v2' plural: 'checlusters'
The following annotations are added to workload resources, such as Deployments to navigate to the Git repository of the associated application using the source code editor:
annotations:
app.openshift.io/vcs-uri: <GIT_REPO_URL>
You can also add the following annotation to navigate to a specific branch:
annotations:
app.openshift.io/vcs-ref: <GIT_REPO_BRANCH>
Note: If Red Hat OpenShift Dev Spaces is installed and configured and git URL annotations are also added to the workload YAML file, then clicking on the edit code decorator redirects you to the Red Hat OpenShift Dev Spaces instance.
Note: When you deploy your application using the OCP Git import flows, then you do not need to add the labels as import flows do that. Otherwise, you need to add the labels manually to the workload YAML file.
The labels are not similar to backstage.io/edit-url
annotations as it points to the catalog entity metadata source file and is applied to Backstage catalog entity metadata YAML file, but not Kubernetes resources.
Tip: You can also add the
app.openshift.io/edit-url
annotation with the edit URL that you want to access using the decorator.
-
In order for Backstage to detect that an entity has Kubernetes components, the following annotation should be added to the entity's
catalog-info.yaml
:annotations: backstage.io/kubernetes-id: <BACKSTAGE_ENTITY_NAME>
-
The following label is added to the resources so that the Kubernetes plugin gets the Kubernetes resources from the requested entity:
labels: backstage.io/kubernetes-id: <BACKSTAGE_ENTITY_NAME>`
NOTE
When using the label selector, the mentioned labels must be present on the resource.
You can also add the backstage.io/kubernetes-namespace
annotation to identify the Kubernetes resources using the defined namespace.
annotations:
backstage.io/kubernetes-namespace: <RESOURCE_NS>
The Red Hat OpenShift Dev Spaces instance is not accessible using the source code editor if the
backstage.io/kubernetes-namespace
annotation is added to thecatalog-info.yaml
file.
To retrieve the instance URL, CheCluster Custom Resource (CR) is required. The instance URL is not retrieved if the namespace annotation value is different from openshift-devspaces
as CheCluster CR is created in openshift-devspaces
namespace.
You can write your own custom label, which Backstage uses to find the Kubernetes resources. The label selector takes precedence over the ID annotations.
annotations:
backstage.io/kubernetes-label-selector: 'app=my-app,component=front-end'
If you have multiple entities while Red Hat Dev Spaces is configured and want multiple entities to support the edit code decorator that redirects to the Red Hat Dev Spaces instance, you can add the backstage.io/kubernetes-label-selector
annotation to the catalog-info.yaml
file for each entity.
annotations:
backstage.io/kubernetes-label-selector: 'component in (<BACKSTAGE_ENTITY_NAME>,che)'
If you are using the above label selector, ensure that you add the below labels to your resources so that the Kubernetes plugin gets the Kubernetes resources from the requested entity:
labels:
component: che # add this label to your che cluster instance
labels:
component: <BACKSTAGE_ENTITY_NAME> # add this label to the other resources associated with your entity
You can also write your own custom query for the label selector with unique labels to differentiate your entities. However, you need to ensure that you add those labels to the resources associated with your entities including your CheCluster instance.
-
The following label is added to workload resources, such as Deployments to display runtime icon in the topology nodes:
labels: app.openshift.io/runtime: <RUNTIME_NAME>
-
As another option, you can include the following label to display the runtime icon:
labels: app.kubernetes.io/name: <RUNTIME_NAME>
Supported values of
<RUNTIME_NAME>
include:- django
- dotnet
- drupal
- go-gopher
- golang
- grails
- jboss
- jruby
- js
- nginx
- nodejs
- openjdk
- perl
- phalcon
- php
- python
- quarkus
- rails
- redis
- rh-spring-boot
- rust
- java
- rh-openjdk
- ruby
- spring
- spring-boot
NOTE Other values result in icons not being rendered for the node.
The following label is added to display the workload resources such as Deployments and Pods in a visual group:
labels:
app.kubernetes.io/part-of: <GROUP_NAME>
The following annotation is added to display the workload resources such as Deployments and Pods with a visual connector:
annotations:
app.openshift.io/connects-to: '[{"apiVersion": <RESOURCE_APIVERSION>,"kind": <RESOURCE_KIND>,"name": <RESOURCE_NAME>}]'
For more information about the labels and annotations, see Guidelines for labels and annotations for OpenShift applications.
-
Install the Topology plugin using the following command:
yarn workspace app add @janus-idp/backstage-plugin-topology
-
Enable TOPOLOGY tab in
packages/app/src/components/catalog/EntityPage.tsx
:/* highlight-add-next-line */ import { TopologyPage } from '@janus-idp/backstage-plugin-topology'; const serviceEntityPage = ( <EntityLayout> {/* ... */} {/* highlight-add-start */} <EntityLayout.Route path="/topology" title="Topology"> <TopologyPage /> </EntityLayout.Route> {/* highlight-add-end */} </EntityLayout> );
Topology is a front-end plugin that enables you to view the workloads as nodes that power any service on the Kubernetes cluster.
- Your Backstage application is installed and running.
- You have installed the Topology plugin. For the installation process, see Installation.
- If RBAC permission framework is enabled, ensure to add the following permission policies in an external permission policies configuration file named
rbac-policy.csv
to allow the rbac admins or your desired user(s)/group(s) to access the topology plugin:
g, user:default/<YOUR_USERNAME>, role:default/topology-viewer
p, role:default/topology-viewer, topology.view.read, read, allow
p, role:default/topology-viewer, kubernetes.proxy, use, allow
p, role:default/topology-viewer, catalog-entity, read, allow
p, role:default/topology-viewer, topology.view.read, read, allow
grants the user the ability to see the Topology panel. p, role:default/topology-viewer, kubernetes.proxy, use, allow
grants the user the ability to view the pod logs. p, role:default/topology-viewer, catalog-entity, read, allow
grants the user the ability to see the catalog item.
-
Open your Backstage application and select a component from the Catalog page.
-
Go to the TOPOLOGY tab and you can view the workloads such as Deployments, Pods as nodes.
-
Select a node and a pop-up appears on the right side, which contains two tabs: Details and Resources.
The Details and Resources tab contain the associated information and resources of the node.
-
Click on the Open URL button on the top of a node.
When you click on the open URL button, it allows you to access the associated Ingresses and runs your application in a new tab.