We are trying to create different bucket for different source system, and give them access only to dump data on particular bucket. They should not have read access, i.e. they shouldnt be able to see hats there inside the bucket. Is it doable , if yes how ?
You are probably looking for roles/storage.objectCreator role (take a look at IAM roles for Storage) :
Allows users to create objects. Does not give permission to view, delete, or overwrite objects.
You can create a custom role for your project, which has only write access. Find storage permissions here. Then you can assign the created custom role to a person or service account with IAM.
Related
I have some sensitive data saved on GCS bucket. Now, the requirement is to generate V4 signed urls of the GCS objects and allow only certain users to download the objects who possesses the url. However, other users should only be able to see that object is present on GCS but should not be allowed to download the same.
For this, we have created a service account which has Storage Admin role (yes, we can further restrict this) and same is used to generate the urls. However, the issue is, any user who is having storage object viewer role, is able to download the object which we do not want. Is there any way we can restrict all other users apart from service account to download the object?
Also, I tried creating a custom role which was given storage.buckets.list and storage.objects.get or storage.objects.list permissions, and then assign that role to the desired users but in both the cases, user was able to download the files. Apart from these 2 permissions, i could not find any other permission which could restrict the download.
The IAM policy applied to your project defines the actions that users can take on all objects or buckets within your project. An IAM policy applied to a single bucket defines the actions that users can take on that specific bucket and objects within it.
1.Create an IAM policy for your buckets that gives one user administrative control of that bucket. Meanwhile, you can add another user to your project-wide IAM policy that gives that user the ability to view objects in any bucket of your project.
2.Go to your bucket and define the members and the assigned roles, which grant members the ability to perform actions in Cloud Storage as well as Google Cloud more generally.
here is the link from GCP docs: https://cloud.google.com/storage/docs/collaboration
I am having a hard time understanding Azure docs and terminologies. The problem is this. My customer has an azure bucket and we need to read/write to this bucket. They won't be sharing their storage account credentials either.
This can be achieved in AWS by following this:
https://aws.amazon.com/premiumsupport/knowledge-center/cross-account-access-s3/
I have just created an IAM user and asked my customers to allow the necessary permissions in the bucket policy. Thus, with one IAM user and one set of credentials, I can write to multiple buckets belonging to multiple AWS accounts.
Is something like above also possible in Azure?
they can create a Shared access signature while they can control what kind of access you need to have and also when to expire.
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 want my service account to be able to create files and folders in my bucket but disallow any read/list/download for objects in that bucket. I am not able to figure out what permissions to set for my bucket/service-account. Any ideas on this?
You can have a look at the general Identity and Access Management (IAM) page for Google Cloud Storage. From that, you can either use one of the predefined Cloud Storage roles, or create a custom role with the specific IAM permissions that you need. Let's follow both approaches:
Standard Cloud Storage IAM Roles: in this page you can find the complete list of available IAM Roles. Given the use case you present, you should consider using roles/storage.objectCreator role, as it only grants storage.objects.create permissions, and you cannot view or list objects.
Custom IAM Roles: you can follow this guide to create a custom IAM Role, and the define the specific permissions that you want to grant to your bucket. In this other page you can see a list of all the available permissions. You should use storage.objects.create, but you may be interested in adding also a different permission such as storage.objects.delete in order for the Service Account to be able to overwrite content (which cannot be done with the roles/storage.objectCreator role, as it does not have delete permissions).
So in general, and applying your specific use case, you could say that you can use the roles/storage.objectCreator standard role. However, you must take into account that using it, you will not be able to override content, as for that purpose, you will need the storage.objects.delete permission too. In that case, you can create a custom role.
My intention is simple- to create a role that I can assign to a standard user of my AWS account so that they can read/write to one of my S3 buckets.
I've created a policy to apply to the role and I'm happy with that bit.
The thing I'm a bit confused about is the "Select Role type" screen in the management console (see attached image). I can't work out what I'm supposed to choose at this stage as none of the descriptions seem to apply to the simple thing I'm trying to achieve.
Does anyone have any idea?
I think you are on the wrong path here. Roles are not ACLs for users, but for systems and services.
See: IAM Roles
If you want to grant a user access to some AWS resources you should have a look at the policy section. Either use a pre-build (like AmazonS3ReadOnlyAccess or AmazonS3FullAccess) or define a policy on your own.
You can then assign this policy to a user. If you want to manage multiple users this way, you can also use groups to assign policies to users.