CN104636189A - Xen-based virtual machine deployment system and Xen-based virtual machine deployment method - Google Patents

Abstract

A Xen-based virtual machine deployment system and method belong to the field of virtual machine rapid deployment systems. The existing Xen virtual machine rapid deployment system cannot be applied to large-scale cloud environment requirements, and cannot dynamically change the software environment and IP address of the virtual machine. The present invention adopts the combination of JSP webpage server, Tomcat webpage server and MySQL database as the front-end and management system of the front-end system according to the needs of users. The front-end system selects the incremental image in the image template library and adopts the incremental virtual machine deployment method to deploy different operating systems and virtual machines of different applications with one click; according to user needs Information automatically configures the IP address of the virtual machine; based on the deployment of different operating systems and virtual machines of different applications, it allows users to control the life cycle of the virtual machine; it can also dynamically change the software environment of the virtual machine.

Description

Xen-based virtual machine deployment system and method

technical field

The invention relates to a Xen-based virtual machine deployment system and method.

Background technique

Virtual machine rapid deployment technology is currently a hot spot in virtualization research.

XenFire is a single-server Xen virtual machine rapid deployment system. It can quickly deploy a virtual machine on a server, and use the DHCP server provided by the XEN platform to automatically deploy the network. The function of this method is relatively single, and it is impossible to deploy multiple different virtual machines as required.

MLN (Manage Large Network) is a multi-virtual machine management software based on Xen and UML (User Mode Linux) platforms. The system proposes a template-style virtual machine rapid deployment method. A template is a system image composed of an operating system and software. The size of the template image depends on the size of the operating system and the size of the software installed in it. Users can select the corresponding template according to their needs, and then copy and deploy it. The disadvantage of this method is that the templates tend to be large and numerous. It takes up a lot of hard disk space and takes a lot of copying time during deployment.

Yuan Jinyan et al. improved the shortcomings of MLN and proposed a rapid deployment mechanism for multiple virtual machines. This approach turns a template into a base system image plus incremental images of the software. Incremental mirroring adopts the copy-on-write method to save modifications to the operating system without modifying the basic operating system mirror.

The Xen virtual machine rapid deployment system is mainly aimed at small-scale deployment, mainly single-machine deployment, without considering the needs of large-scale cloud environments, and secondly, the current technology cannot dynamically change the software environment and IP address of the virtual machine.

Contents of the invention

The purpose of the present invention is to solve the problem that the existing Xen virtual machine rapid deployment system cannot be applied to large-scale cloud environment requirements, and cannot dynamically change the software environment and IP address of the virtual machine, and proposes a virtual machine deployment based on Xen systems and methods.

A Xen-based virtual machine deployment system and method, the virtual machine deployment system includes a front-end server; the front-end server includes: a webpage front-end subsystem and a background function module, and the webpage front-end includes:

Tomcat web server for interacting with users;

A MySQL database used to record user information and maintain network and virtual machine information; for users to query and modify;

The background function module includes:

A control module for commands issued by users and information from the MySQL database;

Image template library used to store all base images and incremental images of the system;

Libvirt control library used as a communication bridge between the front-end server and the load server.

A Xen-based virtual machine deployment method, the deployment and management method is achieved through the following steps:

Step 1. The front-end server uses a combination of JSP web server, Tomcat web server, and MySQL database as the front-end and management system of the front-end system. The front-end server interacts with the user, and according to the configuration parameter information of the user's needs obtained through the interaction, the Libvirt control library is used. The communication form sends different instructions to the load server, and the front-end system selects the incremental image in the image template library and adopts the incremental virtual machine deployment method to deploy different operating systems and virtual machines for different applications with one click;

Step 2, automatically configuring the virtual machine IP address according to the user demand information described in step 1;

Step 3. Based on the virtual machines of different operating systems and applications deployed in step 1, the user can control the life cycle of the virtual machines and dynamically change the software environment of the virtual machines.

The beneficial effects of the present invention are:

The present invention is aimed at the current large-scale commercial cloud computing environment, which requires the system to be able to deploy a large number of virtual machines with different operating systems and different applications at high speed. Automatically configure the IP address of the virtual machine according to the IP required by the user, and make a large number of incremental images for each operating system. Since these incremental images occupy a small space, they do not need to occupy a large amount of hard disk space during deployment. When users need to deploy a large number of specific operating systems and software, they only need to copy the corresponding incremental image, and do not need to copy the basic operating system image, realizing one-click rapid deployment of virtual machines with different operating systems and different applications, so that the deployment operation The time required by the system is reduced by about 80%. On the basis of the deployed operating system, users can quickly control the life cycle of the virtual machine, and it is convenient to dynamically and quickly change the software environment and IP address of the virtual machine. By discarding the original incremental image of the target virtual machine, and then The method of adding incremental images containing corresponding software is deployed in batches, which increases the deployment speed by 60-70%, that is, the process of adding applications to virtual machines is automated, and batch deployment and installation are easy to manage.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the deployment system involved in the present invention during operation with users and load servers;

Fig. 2 is a flowchart of one-click deployment of different operating systems involved in the present invention;

Fig. 3 is the flowchart of automatic configuration virtual machine IP address involved in the present invention;

FIG. 4 is a flow chart of the life cycle of the user-controlled virtual machine involved in the present invention;

Fig. 5 is a schematic diagram of the relationship between the operation commands involved in the present invention;

Fig. 6 is a schematic diagram of the automatic adding application involved in the present invention.

Detailed ways

Specific implementation mode one:

The Xen-based virtual machine deployment system of the present embodiment, as shown in Figure 1, the virtual machine deployment system includes a front-end server; the front-end server and a user and a group of load servers constitute an overall operating system, and the front-end server includes: The front-end subsystem of the webpage and the background function module, the front-end of the webpage includes:

Tomcat web server for interacting with users;

A MySQL database used to record user information and maintain network and virtual machine information; for users to query and modify;

The background function module includes:

It is used to call the API application program interface of the Libvirt control library to remotely control the control module of each load server Xen platform through the SSH protocol according to the command issued by the user and the information of the MySQL database;

It is used to store all the basic images and incremental images of the system, and provide NFS service image template library for each load server; each load server uses the incremental image in the image template library as the hard disk image of the virtual machine;

Libvirt control library used as a communication bridge between front-end servers and load servers.

Specific implementation mode two:

The Xen-based virtual machine deployment method of the present embodiment is characterized in that: the deployment and management method is realized through the following steps:

Step 1. The front-end server uses a combination of JSP web server, Tomcat web server, and MySQL database as the front-end and management system of the front-end system. The front-end server interacts with the user, and according to the configuration parameter information of the user's needs obtained through the interaction, the Libvirt control library is used. The communication form sends different instructions to the load server, and the front-end system selects the incremental image in the image template library and adopts the incremental virtual machine deployment method to deploy different operating systems and virtual machines for different applications with one click;

Step 2, automatically configuring the virtual machine IP address according to the user demand information described in step 1;

Step 3. Based on the virtual machines of different operating systems and applications deployed in step 1, the user can control the life cycle of the virtual machines and dynamically change the software environment of the virtual machines.

Among them, JSP web server (Java Server Pages) is a network programming extension of the Java language. It is improved from Servlet and realizes the support of Java in Html language. The JSP web server is the same as the Servlet, it is executed on the server side, and the result of the execution is returned in the form of Html, so the user can browse through the browser. When the user visits the page of the JSP web server, the server will first execute the program in the page, and return the execution result together with the existing Html code to the browser, thereby realizing the function of the dynamic web page.

Tomcat web server is a very popular free web server. It is a core project of the Apache Foundation, and thanks to companies like Sun, it supports the latest versions of the JSP and Servlet specifications. The Tmocat server has complete functions, advanced technology, and stable performance, so it has been widely recognized.

The MySQL database is an open source database operating system that belongs to Oracle. It is a relational database that provides support for several programming languages. The MySQL database supports multiple storage engines, and has visual management tools that support most current operating systems. It allows users to connect to databases using multiple protocols such as TCP and JDBC, providing users with a convenient interface. Due to its superior performance and light size, the MySQL database has been favored by users and has become one of the most popular databases at present.

Specific implementation mode three:

The difference from Embodiment 2 is that, in the method for deploying and managing a Xen-based virtual machine in this embodiment, the process of deploying different operating systems by one-click deployment of incremental virtual machines as described in Step 1 is as shown in Figure 2 Shown:

Step one one: the user configures various parameters of the virtual machine on the front end of the web page;

Step 1 and 2: The Tomcat web server enters the configuration parameter information required by the user into the MySQL database;

Step 13: The Tomcat web server invokes the control module to start deployment;

Step 14: the control module reads the configuration parameter information required by the user from the MySQL database;

Step 15: The control module selects a template from the image template library according to the configuration parameter information required by the user, and copies the template to prepare for application;

Step 16: The control module calls the API application program interface of the Libvirt control library. API is the application program interface, which is the abbreviation of Application Programming Interface, also known as the application programming interface. It is an agreement for the connection of different components of the software system to send control to the load server instruction;

Step 17: The Libvirt control library of the front-end server sends control instructions to the load server through the SSH protocol secure shell protocol, which is a protocol for providing security;

Step 18: The Libvirt control library of the load server returns the command execution result to the front-end server;

Step 19: the control module reads the execution result;

Step 10: Enter the execution result into the MySQL database.

Specific implementation mode four:

Different from Embodiment 3, in the method for deploying and managing a virtual machine based on Xen in this embodiment, the process in which the user configures various parameters of the virtual machine on the front-end of the web page described in step 1 is that the user configures various parameters of the virtual machine on the front-end system. In the front-end interface, the user manually configures parameters such as memory size, virtual machine IP address, server IP address, hard disk size, load server IP address, and virtual machine operating system type.

Virtual machine operating system type: Since the network needs to be composed of virtual machines of various operating system types, the operating system type needs to be configured by the user. In order to maintain the authenticity of the network, the system needs to support the most popular operating system types. The currently supported operating system types are: Ubuntu, CentOS, Debian, Windows7, etc. Since there are many types of operating systems that need to be supported, the Xen platform adopts the HVM mode to run virtual machines.

Memory size, hard disk size: Virtual machines run on load servers, so the memory of each virtual machine should generally not be too large. Since the virtual machine uses incremental mirroring, the configuration of the hard disk size is of little significance. But since the server hard disk size is limited, there should be an upper limit for each virtual machine.

Virtual machine IP address: The virtual machine IP address determines the topology of the network where the virtual machine is located. Users can change the network topology according to their needs by configuring the IP addresses of many virtual machines.

Load server IP address: Since the system consists of many load servers, it is necessary to configure the IP address of the server where the virtual machine is located. The load server only undertakes the task of running the virtual machine, and the hard disks of the virtual machines are gathered in one server using NFS, so the management of the hard disk is more convenient.

Specific implementation mode five:

The difference from specific implementation modes 2, 3 or 4 is that in the deployment and management method of a Xen-based virtual machine in this embodiment, the process of one-key deployment of virtual machines for different applications in step 1 is that the Libvirt control library After initialization, it will connect to the Xen platform of the remote load server; then configure the virtual machine creation parameters according to the configuration parameter information required by the user, and configure the corresponding incremental image at the same time; after all configurations are completed, send Create a command; if the command is successfully executed, the program ends, and if the command is not successfully executed, an error will be reported.

Specific implementation method six:

Different from Embodiment 5, the Xen-based virtual machine deployment and management method of this embodiment, since the system is composed of many load servers, it is necessary to configure the IP address of the server where the virtual machine is located, and the load server only undertakes the operation of the virtual machine. For tasks, the hard disks of the virtual machines are gathered in one server using the NFS file system to configure the IP address of the server where the virtual machines are located, making hard disk management more convenient.

The Xen platform supports three virtual network modes: network bridging mode, routing mode, and virtual network connection mode [13]. The network bridge mode needs to generate a network bridge on the physical machine, and use the physical machine network card (eth0) as the network exit. This mode allows the virtual machine and the physical machine to be in the same network segment at the same time, which is the same as other physical machines running on the local area network where the physical machine is located, and other hosts in the local area network can remotely connect to the virtual machine. The routing mode will use the iptables mechanism for routing under the routing model. All packets received by the physical interface will be processed by the network IP layer of the driver domain. The driver domain (dom0) looks up routing table entries and forwards packets to different client IP addresses. In routing mode, the drive domain is connected to 2 different network segments: the internal network segment used by clients and the network segment connected to the external network. The virtual network mode will also generate a network bridge virbr0, but the virtual network card of the virtual machine is not bridged with the network card of the physical machine. The host machine provides DHCP service to the virtual machine, so the virtual machine can automatically obtain an IP address.

Among these three modes, only the network bridge mode is directly connected to the network card of the physical machine, and the other two modes isolate the virtual network card of the virtual machine from the physical network card, which is more secure. The system adopts the bridge connection mode by default, so that all machines in the virtual network can be exposed to the network, and the network can be more real. In the bridge mode, there is no DHCP server to assign ip addresses, so by default, the ip of the virtual machine cannot be configured according to user needs.

In order to automatically configure the virtual machine ip configured by the user into the virtual machine, the virtual machine in the system will automatically run a script for automatically configuring the network after the system is started. Send the number of the virtual machine to the network configuration module in Dom0, and the network configuration module queries the network configuration of the virtual machine from the database and sends it to the virtual machine, so that the virtual machine can automatically configure the network according to the configuration file information, that is, As shown in Figure 3, the process of automatically configuring the IP address of the virtual machine is as follows:

Step 21. Since the IP in the network where the server is located may change, the client in the virtual machine sends a configuration request to the server in the form of broadcast, and the configuration request includes the number of the virtual machine sending the request;

Step 22. After the server receives the configuration request from the client, it returns configuration information to the client according to the configuration parameter information required by the user. The data format of the configuration information is as shown in Table 1:

Virtual machine number (2 digits) Ip address (15 digits) Subnet mask (15 bits) Gateway (15 digits)

Data format of configuration information in Table 1;

Step two and three, the client modifies the virtual machine network configuration after receiving the configuration information sent by the server, and returns the configuration result to the server after completion;

Step 24: After receiving the feedback from the client, the server sends a confirmation message to the client, and updates the database.

Specific implementation mode eight:

Different from specific embodiments 3, 4 or 6, the method for deploying and managing a virtual machine based on Xen in this embodiment, as shown in FIG.

Step 31, the front-end system provides various virtual machine configuration and operation information to the user;

Step 32, the user controls the virtual machine to start, shut down, suspend, resume, destroy and deploy the software on the front end of the webpage;

Step 33, the Tomcat web server records the user's command information into the MySQL database;

Step three and four, the Tomcat webpage server invokes the control module to implement the order;

Step 35, the control module reads user command information from the MySQL database;

Step 36, the control module calls the API application program interface of the Libvirt control library to send control instructions to the load server;

Step 37, the Libvirt control library of the front-end server sends control instructions to the load server through the SSH protocol;

Step 38, the Libvirt control library of the load server returns the command execution result to the front-end server;

Step 39, the control module reads the execution result;

Step 30, enter the execution result into the MySQL database;

Step 31, if the execution result is to destroy the virtual machine, delete the corresponding image in the image template library;

Among them, the life cycle of the virtual machine is composed of operation commands of starting, shutting down, suspending, resuming, and destroying. The Xen virtual platform of the virtual machine sends two signals of start and shutdown to the virtual machine for the execution of the two operation commands of starting up and shutting down. The two operation commands of suspending and resuming do not need to send signals to the virtual machine, and are directly completed by the VMM layer. The relationship between the above operation commands is shown in FIG. 5 . In addition, the main functions of Libvirt have been represented in Figure 5:

Dom.create(), means: power on,

Dom.shutdown(), means: shutdown,

Dom.suspend(), means: pause,

Dom.resume(), means: resume,

Dom.undifine(), means: destroy.

Specific implementation mode nine:

Different from Embodiment 8, in the method for deploying and managing a virtual machine based on Xen in this embodiment, dynamically changing the software environment of the virtual machine described in step 3 is to automatically add an application. The process is: when the user issues a deployment application After the command, the system discards the original incremental image of the target virtual machine, adds an incremental image containing the corresponding software, and completes the application deployment in the incremental image mode. The schematic diagram of the automatic adding application is as follows: the schematic diagram of the automatic adding application shown in FIG. 6 . The advantages of incremental mirroring application deployment are rapid deployment and batch deployment of applications. Due to the large number of virtual machines in the network, this batch deployment of applications has the advantages of reducing installation time and being easy to manage. Therefore, it is necessary to automatically add applications to virtual machines.

Claims (8)

1. A Xen-based virtual machine deployment system, characterized in that: the virtual machine deployment system includes a front-end server; the front-end server includes: a webpage front-end subsystem and a background function module, and the webpage front-end includes: Tomcat web server for interacting with users; A MySQL database used to record user information and maintain network and virtual machine information; for users to query and modify; The background function module includes: A control module for commands issued by users and information from the MySQL database; Image template library used to store all base images and incremental images of the system; Libvirt control library used as a communication bridge between the front-end server and the load server. 2. A virtual machine deployment method based on Xen, characterized in that: the deployment and management method is realized through the following steps: Step 1. The front-end server uses a combination of JSP web server, Tomcat web server, and MySQL database as the front-end and management system of the front-end system. The front-end server interacts with the user, and according to the configuration parameter information of the user's needs obtained through the interaction, the Libvirt control library is used. The communication form sends different instructions to the load server, and the front-end system selects the incremental image in the image template library and adopts the incremental virtual machine deployment method to deploy different operating systems and virtual machines for different applications with one click; Step 2, automatically configuring the virtual machine IP address according to the user demand information described in step 1; Step 3. Based on the virtual machines of different operating systems and applications deployed in step 1, the user can control the life cycle of the virtual machines and dynamically change the software environment of the virtual machines. 3. according to the deployment and management method of the Xen-based virtual machine described in claim 2, it is characterized in that: the process of adopting the deployment mode of incremental virtual machine one-click deployment of different operating systems described in step 1 is: Step one one: the user configures various parameters of the virtual machine on the front end of the web page; Step 1 and 2: The Tomcat web server enters the configuration parameter information required by the user into the MySQL database; Step 13: The Tomcat web server invokes the control module to start deployment; Step 14: the control module reads the configuration parameter information required by the user from the MySQL database; Step 15: The control module selects a template from the image template library according to the configuration parameter information required by the user, and copies the template to prepare for application; Step 16: the control module calls the API application program interface of the Libvirt control library to send control instructions to the load server; Step 17: The Libvirt control library of the front-end server sends control instructions to the load server through the SSH protocol; Step 18: The Libvirt control library of the load server returns the command execution result to the front-end server; Step 19: the control module reads the execution result; Step 10: Enter the execution result into the MySQL database. 4. according to the deployment and management method of the described Xen-based virtual machine of claim 3, it is characterized in that: the process that the user configures the various parameters of the virtual machine on the front end of the webpage described in step one by one is that the user is at the front end of the front end system In the interface, the user manually configures parameters such as memory size, virtual machine IP address, server IP address, hard disk size, load server IP address, and virtual machine operating system type. 5. according to the deployment and management method of the described Xen-based virtual machine of claim 3 or 4, it is characterized in that: the process of the described one-click deployment of the virtual machines of different applications in step 1 is, after the initialization of the Libvirt control storehouse , will connect to the Xen platform of the remote load server; then configure the virtual machine creation parameters according to the configuration parameter information required by the user, and configure the corresponding incremental image at the same time; after all configurations are completed, issue a creation command to the Xen platform of the remote load server; If the command is successfully executed, the program ends, and if the command is not successfully executed, an error is reported. 6. according to the deployment and management method of the described Xen-based virtual machine of claim 5, it is characterized in that: the process of automatic configuration virtual machine IP address described in step 2 is, Step 21, the client in the virtual machine sends a configuration request to the server in the form of broadcast, and the configuration request includes the number of the virtual machine sending the request; Step 22: After receiving the configuration request from the client, the server returns configuration information to the client according to the configuration parameter information required by the user; Step two and three, the client modifies the virtual machine network configuration after receiving the configuration information sent by the server, and returns the configuration result to the server after completion; Step 24: After receiving the feedback from the client, the server sends a confirmation message to the client, and updates the database. 7. According to claim 3, 4 or 6, the deployment and management method of the Xen-based virtual machine is characterized in that: the process of the user controlling the life cycle of the virtual machine described in step 3 is, Step 31, the front-end system provides various virtual machine configuration and operation information to the user; Step 32, the user controls the virtual machine to start, shut down, suspend, resume, destroy and deploy the software on the front end of the webpage; Step 33, the Tomcat web server records the user's command information into the MySQL database; Step three and four, the Tomcat webpage server invokes the control module to implement the order; Step 35, the control module reads user command information from the MySQL database; Step 36, the control module calls the API application program interface of the Libvirt control library to send control instructions to the load server; Step 37, the Libvirt control library of the front-end server sends control instructions to the load server through the SSH protocol; Step 38, the Libvirt control library of the load server returns the command execution result to the front-end server; Step 39, the control module reads the execution result; Step 30, enter the execution result into the MySQL database; Step 31, if the execution result is to destroy the virtual machine, delete the corresponding image in the image template library; Among them, the life cycle of the virtual machine is composed of operation commands of starting, shutting down, suspending, resuming, and destroying. The Xen virtual platform of the virtual machine sends two signals of start and shutdown to the virtual machine for the execution of the two operation commands of starting up and shutting down. The two operation commands of suspending and resuming do not need to send signals to the virtual machine, and are directly completed by the VMM layer. 8. The method for deploying and managing a virtual machine based on Xen according to claim 7, characterized in that: dynamically changing the software environment of the virtual machine described in step 3 is to automatically add an application, and the process is: when the user issues an order to deploy an application Finally, the system discards the original incremental image of the target virtual machine, adds an incremental image containing the corresponding software, and completes the application deployment in the incremental image mode.