Workload Identity Tokens for Consistent Pod Access Control
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Solution Overview
Problem
Existing cloud service systems lack a mechanism for customers to efficiently write policies that cover all pods within their tenancy, leading to inconsistent access control and potential unauthorized access due to neglected or duplicate policies across multiple pods.
Innovation Solution
Implementing a workload token system that binds multiple pods to a single policy, allowing customers to write policies that cover all pods within a workload, and utilizing an authorization provider to manage and authenticate access requests using a series of cryptographic signatures and service tokens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If individual pod policies are managed separately, then each pod can have customized access control, but administrative overhead increases and policies may be neglected or duplicated across multiple pods
Solution Approach 1:
The patent combines multiple pod access control policies into a single workload-level policy. The workload identity resource represents a collection of pod identities, and a single policy attached to this workload identity automatically applies to all pods within the workload, eliminating the need to manage individual pod policies separately while maintaining customized access control at the workload level.
Solution Approach 2:
The workload identity resource serves multiple functions: it represents a collection of pod identities, acts as a single policy attachment point for multiple pods, and provides a unified authentication mechanism. This universal resource type eliminates the need for separate policy management for each pod while maintaining the ability to provide customized access control for the entire workload.
2Adaptability or versatility
If individual pod policies are managed separately, then each pod can have specific access rules, but inconsistent access control and potential unauthorized access occur due to neglected or duplicate policies
Solution Approach 1:
By merging individual pod policies into a single workload-level policy attached to the workload identity resource, the system ensures that all pods within a workload receive consistent access control rules. This eliminates the risk of neglected or duplicate policies across pods, as the single policy is uniformly applied to all pods in the workload through the unified authentication mechanism.
Solution Approach 2:
The authentication mechanism provides feedback by verifying the workload identity resource and its associated policies before granting access to cloud resources. This feedback loop ensures that consistent access control rules are enforced for all pods within the workload, preventing unauthorized access and ensuring reliability in access control.
3Reliability
If a workload token system is implemented, then consistent access control across multiple pods is achieved, but the system complexity increases with cryptographic signatures and service tokens
Solution Approach 1:
The workload identity resource acts as an intermediary between individual pods and the policy management system. Instead of each pod directly managing its own policies and cryptographic credentials, the workload identity resource serves as a mediator that consolidates pod identities and handles policy enforcement, thereby reducing system complexity while maintaining consistent access control across multiple pods.
Solution Approach 2:
The workload identity resource provides multi-functionality by representing multiple pod identities, serving as a single policy attachment point, and enabling unified authentication through workload tokens. This universal resource type simplifies the system architecture by eliminating the need for separate policy management and cryptographic credential handling for each individual pod, thereby reducing system complexity while ensuring consistent access control.
4Device complexity
If workload-level policy management is implemented, then administrative overhead is reduced, but the ability to provide customized access control for individual pods is limited
Solution Approach 1:
The system enables segmentation of access control at two levels: workload-level policies provide broad access control for all pods in a workload, while individual pod identities within the workload identity resource can have specific roles and permissions assigned. This segmentation allows administrators to manage policies at the workload level for efficiency while still providing customized access control for individual pods when needed, through role-based access control and pod-specific identity assignments within the workload context.
Data Source
AI summary
Techniques are described herein for authenticating a pod. A method can include a manager instance of a computing system authenticating a request for a token to access a computing resource, the request received from a computing process of a plurality of computing processes associated with a service account. The method can include the manager instance of the computing system determining an identity of the service account based at least in part on an authentication. The method can include an identity service of the computing system determining whether to generate the token for the computing process to access the computing resource based at least in part on the identity of the service account and a policy associated with the service account. The method can include the identity service of the computing system generating the token in accordance with a determination to generate the token for the computing process to access the computing resource.