I have a Google Cloud organisation which gives certain access based on the organisation/folder. For example, a CST staff might get "Storage Object Viewer" on the customer folder to be able to read the cloud storage files for debugging. Each customer is one project in the customer folder.
Now I'm trying to setup a bucket (inside the same project under the customer folder) that only a very selected handful should have access to. Is this possible?
Running gsutil iam get shows only 1 service account with access and 1 group, but looking at the UI also all the inherited permissions give read access.
Is there a way (I'm using unified bucket permissions) to disable so there is no inheritance?
Regards,
Niklas
You can use a preview feature named Deny Policies
Related
In my GCP project, people have storage admin access. I want to restrict the person and give few members writing access in the GCP bucket. When I try to revoke the access it is saying cannot change access as it is inherited.
Any way to create custom access for a particular storage bucket in GCP. I have to make this for the AIRFLOW DAG bucket.
Custom roles cannot be recognized upwards on the resource hierarchy. For example, a role created at the project level cannot be used at the folder or organization level.
Similarily, custom roles cannot be recognized laterally. For example, a custom role created at the project level cannot be used in bindings in another project even if they are in the same folder or organization.
To use a custom role in different projects or different folders, customers have to create/define the roles at the parent organization level. Note that currently, a custom role cannot be created at the folder level.
For more information on custom roles you can check the public documentation.
Ok, this is making me pull my hair out I can't believe it's so complex...
So, to achieve what subject says, without giving user read access to all files in all buckets (Other buckets in proj have sensitive data)
I Navigated to the bucket -> permissions and added user as Storage Object Viewer, expecting this to be enough (later it appears this is enough if you have a direct link - or probably also api) but the user trying to navigate console gets stuck on https://console.cloud.google.com/storage/browser?project=xyz (bucket browser page). Message is: "You don’t have permission to view the Storage Browser or Storage Settings pages in this project"
How can I give the user access to list buckets (and therefore go through the UI path in console, without giving general read access to all of Storage? There are no roles called "storage browser" or similar... I'm even up for creating a custom role but what permissions would it need. Apparently storage.objects.list is not it.
Quick answer:
You need a custom role with:
storage.buckets.list
Rant answer:
Finally found the complete permissions reference.
https://cloud.google.com/storage/docs/access-control/iam-permissions
Looked easy enough knowing there are storage.bucket... permissions. With UI it was still a nightmare to create the role though. Adding permissions modal is tiny, and only filterable by role ^^. I don't know a role with these permissions but I know the exact permission. Shows 10 per page of 18xx permissions. Luckily storage permissions are very close to the end so adding service column + reverse sort only took 2 page steps or something. Oh wow, it's like they don't want people to understand this.
As of January 2021, to give a user access to the cloud storage console and access to a particular bucket, let's say to view or upload files:
Create a custom role in Cloud IAM
This custom role needs resourcemanager.projects.get and storage.buckets.list permissions.
The first permission allows the user to actually select the relevant project.
The second permission allows the user to list all the buckets in your account. Unfortunately, there is no way to only list the buckets you want the user to see, but since you can control their access to a bucket, your data is still private and secure.
Create an IAM user
Go into Cloud IAM .
Add an IAM user assign them the new role you created in Step 1.
Assign Permissions on the Bucket Resource.
Go into the bucket you want to provide access to.
Go into the permissions pane.
Assign permission(s) to the IAM user you created in step 2. Assign a Storage role that makes sense for your situation (i.e. Storage Admin if they need to read objects/write objects/update permissions/fully configure the bucket for the bucket or Storage Viewer for read only access).
You can easily test this by using a personal email address and seeing if the permissions are correct and that you're not creating a data breach.
My use case: I needed to give a third party developer access to a bucket that would hold assets for our marketing site. He should not have access to any other bucket but should be free to add/remove assets in this marketing bucket. Being so, I assigned the developer Storage Object Admin role.
I'm currently using web UI to browse the files in one of the buckets and I happen to be the project owner as well. However I get a permission error
You need the storage.objects.list permission to list objects in this
bucket. Ask a project or bucket owner to give you this permission,
then try again.
I'm completely stumped as I'm project owner. Any ideas?
The role roles/owner doesn't grant access to data within buckets.
The best resource to figure out which built-in IAM roles can do which things is the Google Cloud Platform IAM Permissions Reference.
On that page, CTRL-F for storage.objects.list (or for that matter, any other permission you're interested in) and you will see the roles that grant it on the right-hand column. Note that project owner (roles/owner) is not in the list of roles that grant this permission.
When buckets are created, roles/storage.legacyBucketOwner is granted to project owners, editors, and viewers by default. However, this permission can always be revoked, and in fact many users choose to remove this permission for more granular control over access to data in the bucket as opposed to project resources like VMs.
A good example would be a bucket which contains sensitive PII data. You might not want people who can SSH into VMs in the project to be in-scope to read that data.
In the GCP Console navigate to the IAM Admin menu.
Choose IAM (top menu item)
Select your account.
In the info panel click on Add Role
Add the Storage Object Admin role to your account
Choose Service Accounts menu item from the IAM menu (below Quotas)
Select the compute#developer.gserviceaccount.com or default account.
In the info panel click on Add Member and add your account.
You should now have full access to the Storage Bucket
I remember when I used google storage for speech API, I need to go to IAM console to add "Storage Admin" role to the service account even though I'm the project owner.
I understand that you're not using gsutil. But at this point, maybe give it a try to create the service account and give it the right permission? Hopefully, this will make it work for you.
You can try running this command
gsutil iam ch 'user:myacc#mydoma.in:legacyObjectOwner' gs://mybucket
it's worked for me.
else you can go in I&AM and assign the storage admin role to your account.
I have a GCP project and just for testing purpose, I want to grant the permission to 'allUsers'. But when I am trying to add, I am getting error Members of type allUsers and allAuthenticatedUsers cannot be added to this resource. Can somebody help me to understand what I am doing wrong or missing here? Thanks
Check the docs.
Project does not support allUsers and allAuthenticatedUsers as members in a Binding of a Policy.
Sometimes it might be that you’re trying to use a deprecated feature that is already no longer available in web UI and control panels but in fact, is still silently supported for thus who are unable to upgrade.
Granting a role for allUsers is one of these cases and you can find an example of such a case in this answer of a smart-things community.
Regarding the:
Can somebody help me to understand what I am doing wrong or missing here?
You are trying to use insecure permissions that are strongly discouraged. And that is wrong, that is not available in some web user interfaces for a reason. But if Google would ditch such support at all, then IoT devices that are still dependent on this yet out of the reach of developers who could upgrade them would become inoperable, so new users unlikely to see such possibility but thus who used it in the passed will be stay operable.
But if you were unfortunate to delete such permission and now you left a lot of IoT devices without an ability to publish for a PubSub topic (and upgrading devices is not a feasible option) then following mentioned answer from smart things community if you want to allow publishing for a topic bar of the project foo then you can use a set IAM policy API to apply a role roles/pubsub.publisher for allUsers
A resource will be: projects/foo/topic/bar
And policy object will be:
{
"policy": {
"bindings": [
{
"role": "roles/pubsub.publisher",
"members": [
"allUsers"
]
}
]
}
}
The member types permission used to grant allUser or allAuthenticatedUser access to certain Google Cloud resources such as buckets cannot be applied as project roles to projects.
Google Cloud projects provide different levels of access control that are different from those used with buckets, as explained in the following Access Control for Projects using IAM documentation.
There is a three-level policy hierarchy in Google Cloud that puts projects and resources as separate entities. In this hierarchy, policies are inheritable but do have different access control models which are not interchangeable.
You can grant to a Google Cloud project the following permissions:
roles/owner - Full access to all resources.
roles/editor - Edit access to all resources.
roles/viewer - Read access to all resources.
roles/browser - Access to browse resources in the project.
The above project permissions can be fine-tuned at the resource level using member types as explained above.
Try to remove the prevent public access in permissions of your GCP cloud storage bucket. This allows to have fine granular control on individual objects. So that one or many objects in the bucket can be public.
Public access prevention prevents data in your organization or project from being accidentally exposed to the public. When you enforce public access prevention on a new or existing Cloud Storage resource, no one in your organization can make data public through IAM policies or ACLs.
For more see the docs here
Go to your bucket and revoke public access as in below image. Then go to your resource and add permission allUser
Disable the prevention to public access
Go to permissions (right-hand side of configuration)
Disable public access prevention.
then again try to make image public
it'll work
Click em "Edit Access" in your bucket, then remove public access, then try again, you will be able to set allUsers in permissions.
If I create a service account in my project and give it to a third party, can that third party abuse it to create VM instances etc? Or is it only allowed to do things that I give it explicit permission to do?
In the "permissions" section of the Google developers console I can set the service account to "Can edit" or "Can view", but what do those mean?
If you give "edit" or "owner" permissions, the user can create, modify, or delete GCE VM instances (among other resources). If you only give "view" permissions, then they can't create, modify, or delete GCE VM instances.
However, you cannot give fine-grained permissions such as "user can only edit this VM instance, but not this other one".
Per Google Compute Engine docs:
Can View
Provides READ access:
Can see the state of your instances.
Can list and get any resource type.
Can Edit
Provides "Can View" access, plus:
Can modify instances.
On standard images released after March 22, 2012, can ssh into the
project's instances.
Is Owner
Provides "Can Edit" access, plus:
Can change membership of the project.
Per Google Cloud Storage docs:
Project team members are given the following permissions based on
their roles:
All Project Team Members
All project team members can list buckets
within a project.
Project Editors
All project editors can list, create, and delete buckets.
Project Owners
All project owners can list, create, and delete buckets, and can also perform administrative tasks like adding and removing team members and changing billing. The project owners group is the owner of all buckets within a project, regardless of who may be the original bucket creator.
When you create a bucket without specifying an ACL, the project-private ACL is applied to the bucket automatically. This ACL provides additional permissions to team members, as described in default bucket ACLs.
Per Google Cloud SQL docs:
Team members may be authorized to have one of three levels of access:
“can View” (called Viewer in App Engine Console) allows read-only
access.
“can Edit” (called Developer in App Engine Console) allows
modify and delete access.
This allows a developer to deploy the
application and modify or configure its resources.
“is Owner” (called
Owner in App Engine Console) allows full administrative access.
This
includes the ability to add members and set the authorization level of
team members.