Container File System Installation for Host Isolation
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Solution Overview
Problem
Existing methods for installing files on a host file system do not effectively isolate third-party applications from the operating system, leading to visibility issues and unintended updates, and lack tracking of installed files by host management software.
Innovation Solution
The use of containers to store and install files as extensions to the operating system, with an extraction module extracting a container image and a package manager obtaining and installing the files in a hierarchical structure, allowing for isolation and tracking of these files.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If files are installed directly on the host file system, then installation is simple and direct, but third-party applications can inadvertently modify operating system files and host management software cannot track installed files
Solution Approach 1:
The patent segments the file system into distinct namespaces: a host file system for the operating system and container-specific namespaces for third-party applications. This segmentation allows applications to install files without affecting the host system, resolving the contradiction between installation simplicity and system integrity by providing isolated yet manageable file spaces.
Solution Approach 2:
The patent introduces a namespace service as an intermediary between third-party applications and the host file system. This mediator manages file installation requests, redirects them to appropriate container namespaces, and maintains tracking information, thereby enabling simple installation while protecting system integrity through controlled mediation.
2Ease of operation
If third-party applications can access the host file system directly, then file access is straightforward, but inappropriate components can see and modify files they should not
Solution Approach 1:
The patent divides the file system into isolated namespaces where each container has its own file system view. This segmentation ensures that inappropriate components can only access files within their designated namespace, preventing unauthorized visibility and modification while maintaining straightforward file access within permitted boundaries.
Solution Approach 2:
The patent applies local quality by giving each container namespace different file access permissions and visibility characteristics. Files in one container's namespace are invisible to other containers and the host OS, creating localized file environments with appropriate access controls that prevent harmful cross-contamination.
3Reliability
If updates are applied to the host file system, then system updates are comprehensive, but unintended operating system files may be modified
Solution Approach 1:
The patent segments update operations so that updates to third-party applications are applied only within their container namespaces, not to the host file system. This segmentation ensures update completeness for applications while preventing unintended modification of operating system files by confining update scope to appropriate boundaries.
Solution Approach 2:
The namespace service acts as an intermediary that intercepts and redirects update operations. When an update is requested, the mediator determines whether it should apply to the host system or to a specific container namespace, thereby ensuring comprehensive updates where appropriate while preventing unintended modifications through controlled mediation.
4Loss of information
If host management software has full access to the file system, then tracking is comprehensive, but performance overhead increases and isolation is lost
Solution Approach 1:
The patent segments tracking responsibilities so that host management software only needs to track namespaces and their metadata, not individual files within containers. This segmentation reduces management overhead while maintaining tracking completeness at the namespace level, allowing comprehensive oversight without excessive complexity.
Solution Approach 2:
The patent implements self-service by enabling container namespaces to automatically register and unregister themselves with the host management software. This self-service mechanism maintains comprehensive tracking information without requiring continuous active management, thereby reducing performance overhead while preserving tracking completeness.
Data Source
AI summary
An example method of installing one or more files on a host file system includes extracting, by an operating system, a container image from a container. The container image stores a set of files and provides an indication of a hierarchical structure for the set of files. The method also includes obtaining, by the operating system, a package in accordance with the container image. The package includes the set of files. The method further includes installing the package on the host file system in accordance with the hierarchical structure for the set of files.