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Maven / ArgoCD interview questions

How do you configure ArgoCD RBAC and what are the built-in roles?

ArgoCD's RBAC is configured via the argocd-rbac-cm ConfigMap in the argocd namespace. Policies are written in Casbin CSV format and map subjects (users, groups, SSO claims) to resources and actions.

Built-in Roles

RolePermissions
role:readonlyRead-only access to all resources: applications, clusters, repositories, and logs. Cannot sync, create, update, or delete.
role:adminFull access to all resources and actions across all projects.

Custom Policy Syntax

Policy lines follow: p, <subject>, <resource>, <action>, <object>, allow|deny. Group-to-role bindings use: g, <group>, <role>.

# argocd-rbac-cm data
policy.default: role:readonly
policy.csv: |
  p, role:dev-team, applications, sync, staging/*, allow
  p, role:dev-team, applications, sync, production/*, deny
  p, role:dev-team, applications, get, */*, allow
  g, my-org:developers, role:dev-team

Resources include: applications, clusters, repositories, projects, accounts, logs. Actions include get, create, update, delete, sync, override, action.

ArgoCD Projects add a second scoping layer — RBAC controls who can do what, while Projects control what Applications are allowed to target (repos, clusters, namespaces).

What does setting policy.default: role:readonly control in argocd-rbac-cm?
Which line correctly maps an SSO group to a custom ArgoCD role in Casbin policy format?

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