Argo CD Cluster view of managed objects

[agaudreault]

Summary

Argo CD has an excellent view to view resources per Applications. This is quite useful for a developer to see resources managed by their individual Applciation. However, there is a need for argo operator or cluster admin to visualize what are the resources managed by Argo. There is also a need for developers to have a unified views of all the resources they deploy through Argo.

For instance, I would like to be able to quickly answer

• "Is MyCustomKind ever deployed in Argo? If yes, by which Applications?"
• "Are ClusterRole deployed in cluster X? If yes, by which Applications?"
• "What are all the Deployment that my team deploys through Argo (where team is a label on my Applications)?"
• "What are the resources deployed under this ApplicationSet?"
• "How many resources of each kind are present in cluster X?"
• "How many resources of each kind are in Argo"

Argo CD already have the data of the resources managed by an application in the manifest in status.resources.

Motivation

This would help argo operator or cluster admin to visualize what are the resources managed by Argo, so they can understand the ecosystem better before Applying restriction in Argo to increase the security and scalability.

There is also a need for developers to have a unified views of all the resources they deploy through Argo, because Argo does not have a concept of microservice, nor environment.

Some of these questions can be answered by using kubectl and going in each clusters, perform queries, then introspect the argo cd tracking annotation to find the source Argo Application. But this has many limitations, you might need to correlate informations such as "which argo cd instance manage this cluster" if you have multiple Argo CD instances, and in the end, it is provides another view for developers to understand what they deploy and what they own.

Proposal

Create a new left-panel view that will display a list of all resources managed by this Argo instances.
Create filter/group by Application and/or Application Labels
Create filter/group by Cluster
Create filter/group by AppProject
Create filter/group by ApplicationSet
Create filter/group by API Group
Create filter/group by Kind
For each resources, have an hyperlink enabling a one-click redirection the the target Applciation.
Use the same RBAC as the get Applications

[linghaoSu]

I created a resources list inspired by the applications list (mostly by copying and reusing its styles), which supports all requirements except for AppSet filtering.

However, it doesn’t support switching between different views, and the search box doesn’t allow navigation either (as locating the app corresponding to a resource requires too much detailed information).

The related PR is here: #21468. Could you please help review it?