Virtual Machine Proxy Service Configuration Modification
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Solution Overview
Problem
In virtualized platforms, modifying the internal configuration of a virtual machine during startup can fail due to the proxy service (e.g., vmtools service) not being operational in time, leading to delayed or failed configuration modifications.
Innovation Solution
A method and system where a proxy service sends a datum request to a preset IP address via a virtual network card after startup, determining the target virtual machine, obtaining configuration data from a database, and sending modifying instructions to the proxy service to update the internal configuration, with the ability to stop and restart requests based on signal files and changing configuration data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the virtual machine uses a process to periodically inquire the state of the vmtools service during startup, then the system can automatically dispatch configuration modification instructions after the service is ready, but the process may expire before the service is ready (especially when startup is slow due to operations like magnetic disk checking), resulting in failed configuration modification
Solution Approach 1:
Instead of having the mainframe periodically check if the proxy service is ready (active polling), the patent inverts the approach by having the proxy service actively send its readiness status to the mainframe. The proxy service sends a first data packet containing its service identification when it starts up, allowing the mainframe to immediately know when the service is ready without waiting for polling cycles to expire.
Solution Approach 2:
The proxy service performs self-announcement of its readiness state by automatically sending the first data packet to the mainframe upon startup. This eliminates the need for the mainframe to continuously poll or wait for the service to become ready, as the service itself provides the readiness information.
2Reliability
If the virtual machine has low startup speed (e.g., checking magnetic disk), then the vmtools service may not be ready when the inquiry process expires, but increasing the inquiry duration or speed would delay other startup operations
Solution Approach 1:
The proxy service autonomously determines its own readiness and actively communicates this state to the mainframe by sending the first data packet. This eliminates the need for the mainframe to implement complex timing mechanisms or extended waiting periods to accommodate slow services, as the service itself signals when it is ready.
Solution Approach 2:
The system establishes a feedback mechanism where the proxy service provides real-time status information to the mainframe through the first data packet. This allows the mainframe to immediately respond with configuration modification instructions once readiness is confirmed, without needing to account for variable startup speeds through extended timing windows.
3Reliability
If the mainframe waits for the proxy service to be ready before sending modification instructions, then configuration changes can be applied successfully, but the overall startup time increases
Solution Approach 1:
The patent inverts the traditional waiting paradigm by having the proxy service actively announce its readiness rather than the mainframe passively waiting. The first data packet sent by the proxy service immediately triggers the mainframe to send configuration modification instructions, eliminating the time loss associated with waiting or repeated polling.
Data Source
AI summary
The present application discloses a method for modifying an internal configuration of a virtual machine, a system and a device, wherein the method is applied to a virtual machine installed with a proxy service therein, and the proxy service is configured for, after the proxy service itself is started up, sending a datum request to a preset IP address via a virtual network card corresponding to the virtual machine. The method includes, when there is a target virtual network card sending a datum request to the preset IP address, according to a predetermined corresponding relation between virtual network cards and virtual machines, determining a target virtual machine corresponding to the target virtual network card; from a database, obtaining target configuration data corresponding to the target virtual machine.