Cloud Fleet Manager VM Backchannel Tenant Isolation
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Solution Overview
Problem
Managing the lifecycle of infrastructure data plane nodes in a multi-tenant cloud environment is challenging due to the need for tenant isolation and security, making it infeasible to have a shared infrastructure management instance without violating tenant isolation principles.
Innovation Solution
Implementing an in-line fleet management system using a fleet manager that communicates with infrastructure managers through a VM backchannel, allowing each tenant to manage their infrastructure data plane nodes without requiring shared management domains or networks, and enabling registration, instantiation, and modification of nodes while maintaining tenant-specific state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a shared infrastructure management instance is used across multiple tenants, then device complexity is reduced and ease of operation is improved, but tenant isolation and security are compromised
Solution Approach 1:
The patent segments the infrastructure management function by creating a separate infrastructure manager instance for each tenant. Each infrastructure manager is responsible solely for managing infrastructure nodes within its own tenant context, ensuring complete isolation between tenants while maintaining individualized management capabilities. This segmentation resolves the contradiction by sacrificing shared management complexity to preserve tenant isolation and security.
Solution Approach 2:
The patent introduces a fleet manager as an intermediary component that coordinates between the centralized cloud management system and individual tenant infrastructure managers. The fleet manager receives modification requests from the infrastructure management node, translates them into tenant-specific commands, and delivers them through the hypervisor to the appropriate infrastructure nodes. This intermediary layer enables controlled access while maintaining tenant isolation boundaries.
2Ease of operation
If direct IP access is provided to infrastructure nodes for management, then ease of operation is improved, but security and tenant isolation are compromised
Solution Approach 1:
The patent implements the hypervisor as a mandatory intermediary between any management system and infrastructure nodes. All modification requests must pass through the hypervisor, which validates permissions, translates commands, and ensures that only authorized operations are executed on infrastructure nodes. This intermediary layer eliminates direct IP access requirements while maintaining operational capability through controlled communication channels.
Solution Approach 2:
The patent replaces direct mechanical IP-based network access with a virtualized management mechanism. Instead of directly addressing infrastructure nodes via IP, the system uses virtual machine backchannels and hypervisor-mediated communication to deliver management commands. This substitution maintains ease of operation through automated command translation while securing the infrastructure against unauthorized direct access.
3Reliability
If separate infrastructure management instances are created for each tenant, then tenant isolation and security are improved, but device complexity increases
Solution Approach 1:
The patent implements infrastructure nodes as universal virtual machine templates that can be instantiated across multiple tenants. The same infrastructure node template serves multiple purposes: it can be deployed to different tenants, modified through standardized APIs, and managed through a common fleet manager interface. This universality reduces overall system complexity by eliminating the need for tenant-specific custom management instances while preserving complete tenant isolation through virtualization boundaries.
4Reliability
If infrastructure nodes are managed through virtual machine backchannels, then tenant isolation and security are improved, but communication overhead and complexity increase
Solution Approach 1:
The patent implements preliminary registration of infrastructure nodes with the fleet manager before they are needed. During the registration phase, the fleet manager establishes communication protocols, allocates management channels, and pre-configures the infrastructure nodes with necessary identifiers and endpoints. This preliminary action simplifies subsequent communication by having all necessary connection parameters ready in advance, reducing the complexity of real-time communication through virtual machine backchannels.
Data Source
AI summary
A fleet manager within a cloud computing system utilizes a registration framework with one or more cloud infrastructure managers having corresponding infrastructure data plane nodes, which may be in use by different tenants. Instead of having the infrastructure managers communicate directly with its corresponding infrastructure data plane nodes via a management network or domain, the fleet manager communicates with infrastructure managers and relay commands, instructions, and other payloads to the infrastructure data plane nodes using a virtual machine (VM) communication backchannel.