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feat: implement organization "disable workspace sharing" option #21297

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@geokat geokat commented Dec 16, 2025 •
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wip: the PR is currently in draft mode to discuss the migration of the org-member role to the DB

Migrating Org-Member Role to Database

Problem

The organization-member role is hardcoded. This makes it easy to keep it in sync with resource types supported by Coder, but prevents per-org customization (e.g., workspace_sharing_disabled).

Solution: Database-Backed System Roles

Store organization-member roles per-org in the custom_roles table with an is_system flag. Create the roles during org creation and reconcile them at startup to keep permissions in sync with the codebase.

  1. Schema Changes
  • Added is_system boolean column to the custom_roles table — marks Coder-managed roles
  • Added member_permissions — for member-scoped permissions (resources owned by the user)
  • Added workspace_sharing_disabled to organizations — per-org setting
  1. Migration
  • Brings existing organizations up to date by creating empty placeholder organization-member system roles for all existing organizations
  • Permissions are empty initially (eventually backfilled by the startup reconciliation hook)
  1. Permission Generation (coderd/rbac/roles.go)
  • OrgMemberPermissions(workspaceSharingDisabled bool) is the source of truth
  • Generates org-level and member-level permissions dynamically
  • Respects the workspace sharing setting (adds negation for ActionShare when disabled)
  1. Org Creation Hook (enterprise/coderd/organizations.go)
  • When a new org is created, the organization-member role is created in the same transaction
  • Uses OrgMemberPermissions(false) since new orgs have sharing enabled by default
  1. Startup Reconciliation (coderd/systemroles.go)
  • ReconcileOrgMemberRoles() runs at startup with an advisory lock
  • Compares expected vs stored permissions using set-based comparison
  • Updates roles if permissions differ (handles RBAC resource changes)
  • Creates missing roles (handles rolling upgrade edge cases)
  • Blocking lock ensures each instance reconciles, catching orgs created by old instances

Key Design Decisions

Decision Rationale
Permissions as source of truth in code Moving them to the DB is a big project; duplicating them in the DB is error-prone
Introduce system roles is_system = true makes them transparent to the CRUD API
Startup reconciliation Resource type changes in code are propagated to roles stored in the DB
Set-based comparison Avoids unnecessary writes when permissions are unchanged
Blocking advisory lock Ensures correctness during rolling upgrades

closes: coder/internal#1073

@bpmct bpmct added the doc-check Assign this label to PRs to check for any doc changes. label Dec 16, 2025
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geokat commented Dec 16, 2025

@aslilac @Emyrk More work is needed to address all of the coder/internal#1073 requirements, but I wanted to run this approach for migrating the built-in role by you early on. The code isn't ready for review yet, but it should demonstrate the pros and cons of the chosen approach.

Other alternatives I can see--using the DB as the source of truth for permissions or duplicating them in the DB--seem to be more involved and error-prone than running reconciliation at startup. But please let me know if you disagree or have other ideas.

@geokat geokat force-pushed the geokat/internal-1073-organization-disable-workspace-sharing-option branch 2 times, most recently from 0e2cd81 to 3f8082b Compare December 17, 2025 16:18
@geokat geokat force-pushed the geokat/internal-1073-organization-disable-workspace-sharing-option branch from 3f8082b to 7a3ffb0 Compare December 17, 2025 17:52
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Implement organization "disable workspace sharing" option

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