CN104063267A - Method and system for monitoring flow of virtual machine - Google Patents
Method and system for monitoring flow of virtual machine Download PDFInfo
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Abstract
The invention discloses a method and system for monitoring the flow of a virtual machine. The method comprises the steps that firstly, the virtual machine including a monitor module is started; a data packet capturing module and a data cache module are deployed into an inner core of a monitor of the virtual machine; the data packet capturing module copies a data packet flowing through a TCP/IP protocol stack according to a filtering mechanism, and the data packet is stored in the cache of the data cache module; the data cache module transmits the cached data packet to the monitor module; the monitor module carries out statistic analysis on the data packet, and the flow of the virtual machine is monitored. The problem that communication between virtual machines is out of monitoring due to server virtualization is solved, and communication of the virtual machines on the same physical server and communication of the virtual machines and a server external network can be monitored in a unified mode.
Description
Technical field
This invention relates to the traffic monitoring of server virtual machine virtual machine, relates in particular to virtual machine flux monitoring method and system on physical server.
Background technology
Server virtualization can improve the utilization factor of computational resource, strengthens the managerial flexibility of IT resource, and therefore, this technology becomes current data center important technology.Yet, after server virtualization, on same physical server, there are a plurality of virtual machines, the communication between these virtual machines cannot be deployed in the supervisory system institute perception outside physical server.
Existing method is to realize by traffic redirect strategy, comprises two large classes, and a class is virtual machine traffic redirect to be monitored to processing on the network equipment outside server.Another kind of is that virtual machine flow is redirected in the virtual machine on monitor of virtual machine (Virtual Machine Monitor, VMM) and is monitored by virtual machine switch.The advantage of first kind method is to utilize existing monitoring resource, but need to revise procotol driving or increase new network hardware equipment.Equations of The Second Kind method is more common, but relies on the configurable ability of virtual switch, lacks the optimization ability of aspect of performance, meanwhile, can only give outer monitoring equipment and process, the managerial ability of shortage unified monitoring for virtual machine with outside communication flows monitoring.
Summary of the invention
The object of the invention is to: utilize the Hook Mechanism of monitor of virtual machine to obtain the communication data stream of virtual machine, and introduce caching mechanism and filtering policy, improve the efficiency of monitoring; The invention discloses a set of supervisory system simultaneously, can realize the unified monitoring to communication between virtual machine and virtual machine and server PERCOM peripheral communication.
The present invention is achieved in that
A kind of virtual machine flux monitoring method comprises the following steps:
Step 1: at the upper virtual machine that comprises monitoring module that starts of monitor of virtual machine (Virtual Machine Monitor, VMM), by kernel module loading interface, packet capture module and data cache module are loaded in kernel; Monitoring module and data cache module are established a communications link; Monitoring module issues and filters address list to kernel; Monitoring module sends startup command to kernel.Idiographic flow is as follows:
1., start after the virtual machine comprise monitoring module, monitoring module also starts operation;
2., monitoring module calls kernel module loading interface, loads packet capture module and data cache module to kernel;
3., data cache module and security monitoring module connect;
4., security monitoring module sends address filtering table to described data cache module;
5., security monitoring module sends enabled instruction to described data cache module;
6., data cache module arranges kernel global variable value for starting.
Step 2: packet capture module is monitored by data in monitor of virtual machine VMM kernel ICP/IP protocol stack; According to data address filter table duplicate packet, and store in the buffer memory of data cache module; Data module module sends the data to monitoring module.Idiographic flow is as follows:
1., data cache module judges described kernel global variable value, starts if, distribute a certain size buffer memory, and open
Moving data buffer storage treatment progress; Otherwise do not do any processing;
2., packet capture module judges described kernel global variable value, starts if, starts described packet capture mould,
Otherwise, do not do any processing;
3., packet capture module judges whether current ICP/IP protocol stack data packet addressed mates described address filtering table; Mate duplicate packet and store in the buffer memory of described data cache module; Otherwise, do not do any processing;
4., data buffer storage process judges in described buffer memory whether be empty, being connected that not empty reading cache data is also set up by described data cache module and described security monitoring module sends data; Sky is left intact.
Step 3: monitoring module extracts the essential information of packet, statistical data analysis flow, shows statistic analysis result and alarm.Idiographic flow is as follows:
1., monitoring module calls pretreatment module and extracts data packet head information, comprises source object MAC, source object IP, packet
Size;
2., the session traffic at monitoring module statistical data packet place, session content, and analyze intrusion behavior according to inbreak detection rule; According to malicious code rule detection malicious code;
3., statistical analysis module is according to output configuration requirement, output statistic analysis result, and shows at the page;
4., statistical analysis module is according to alarm configuration requirement, outputting alarm result, and showing at the page.
A virtual machine flux monitoring system, is characterized in that, described system comprises as lower module:
1., monitoring module: for disposing packet capture module, data cache module; Call pretreatment module and statistical analysis module; Establish a communications link with data cache module; Accept the packet that data cache module is sent, issue address filtering table, order to data cache module; Management and monitoring configuration; Pretreatment module: obtain described data packet head information, comprise source object MAC, source object IP, data package size;
2., statistical analysis module: the result for the pretreatment module to described is carried out statistical study, comprises session traffic statistics, session content reduction; According to inbreak detection rule, analyze intrusion behavior; According to malicious code rule detection malicious code; According to output configuration and alarm configuration, output statistic analysis result and alarm result, and show at the page;
3., packet capture module: for the packet at monitor of virtual machine (VMM) kernel monitoring ICP/IP protocol stack, and copy described packet according to described address filtering table; And store in the buffer memory of data cache module;
4., data cache module: for setting up and being connected of described monitoring module; Data in transmission institute buffer memory are to described monitoring module; Accept the instruction and data that described monitoring module sends;
The good effect that the present invention has compared to prior art is: patent of the present invention can the virtual virtual machine bringing of settlement server between communication lose the problem of monitoring, and realized the unified monitoring of communicating by letter of the communication between virtual machine on Same Physical server and virtual machine and server external network.In addition, patent of the present invention is by introducing caching mechanism, and packet filtering is machine-processed, and offline storage mechanism, has solved the performance impact problem of monitoring function to monitor of virtual machine.
Accompanying drawing explanation
Fig. 1 is the monitoring treatment scheme of a kind of virtual machine flow disclosed by the invention.
Fig. 2 is that the supervisory system of a kind of virtual machine flow disclosed by the invention forms.
Fig. 3 is each module connection diagram of a kind of virtual machine monitoring system disclosed by the invention.
Embodiment
The present invention provides a kind of unified supervisory system for the traffic monitoring between the traffic monitoring between virtual machine and virtual machine and server external network.For the system and method in the present invention is better described, the present invention has provided some concrete legends, here these accompanying drawings is described.It should be noted that, legend given here is a kind of example of the present invention, for those skilled in the art, can obtain other accompanying drawings according to these examples.Below in conjunction with the accompanying drawing in the present invention, the technical scheme in the present invention is carried out clear, intactly describe.
The treatment scheme of the flux monitoring method of a kind of virtual machine disclosed by the invention is as shown in Figure 1:
Initial phase: start the virtual machine that comprises monitoring module 201 on monitor of virtual machine, packet capture module 205 and data cache module 204 are deployed to kernel, monitoring module 201 and data cache module 204 connect, monitoring module 201 issues and filters address list to kernel, monitoring module 201 sends startup command to kernel, and supervisory system is disposed complete.
In the present invention, packet capture module 205 and data cache module 204 all operate in kernel, before operation, first by kernel programming interfaces, are loaded in kernel.Because monitoring module is deployed in virtual machine, and virtual machine operates in user's state, therefore, need to build the communication connection of kernel and user's space.After connecting, monitoring module 201 sends address filtering list to kernel, provides packet capture module 205 to use.Then, monitoring module 201 kernels send startup command to kernel, and data capture module 205 and data cache module 204 are started working.
The data capture stage: packet capture module 205 is monitored ICP/IP protocol stack 206 data, according to address filter table duplicate packet, and stores in the buffer memory of data cache module 204, and 204 of data buffer storage moulds send the data to monitoring module 201.
In the present invention, packet capture module 205 checks the packet of each ICP/IP protocol stack 206 of flowing through, according to the MAC value of each packet or IP information, compare with the address information in address filtering list, if coupling, corresponding packet is replicated portion, and stores in the buffer memory of data cache module 204.Buffer memory in data cache module 204 is that data cache module 204 is pre-assigned, and can dynamically expand according to actual amount; When data cache module 204 finds that buffer memory is not empty, the connection of setting up by kernel and user's space by Packet Generation to the monitoring module 201 in virtual machine;
In the data statistic analysis stage: monitoring module 201 extracts data packet head essential information, statistical data analysis flow is shown statistic analysis result and alarm.
The supervisory system institutional framework that the invention discloses a kind of virtual machine flow as shown in Figure 2, this virtual machine flux monitoring system comprises following components:
1, monitoring module 201:
This module is to realize the nucleus module that virtual machine traffic monitoring is analyzed, and comprises pretreatment module 202 and statistical analysis module 203.This monitoring module 201 is realized loading and the unloading of data cache module 204 and data capture module 205; Connect with the data cache module 204 of kernel, and obtain the communication flows of virtual machine and send control command by this connection.This monitoring module 201 also provides configuration management function, comprises result output configuration, alarm configuration, off-line statistical study configuration.Result output configuration and alarm configuration are controlled for page bandwagon effect.Off-line statistical study is configured for to carve at one's leisure processes off-line data bag, reduces the performance impact of monitoring module to virtualized server.
2, pretreatment module 202:
This module major function is that the packet to receiving carries out essential information extraction, for statistical analysis module 203 is offered help.Meanwhile, pretreatment module 202 can also directly store by certain format the packet of receiving in external memory storage into according to off-line arrangement, realizes monitoring module 201 processed offline patterns, and this configuration can be used when real-time monitoring has influence on server performance.
3, statistical analysis module 203:
This module major function is according to the result of described pretreatment module 202, and packet is further analyzed.Comprise traffic statistics, content reduction.In conjunction with intrusion detection engine, detect analysis; In conjunction with malicious code feature, carry out malicious code and detect analysis; According to showing configuration requirement, 203 pairs of statistic analysis result of this statistical analysis module are carried out page displaying; According to alarm configuration requirement, this statistical analysis module 203 carries out alarm with page alarm form.
4, data cache module 204:
This module major function is the data of storing from packet capture module 205, and is transmitted to monitoring module 201 in secure virtual machine.Meanwhile, this module is accepted the order from described security monitoring module 201; In the present invention, data buffer storage is that data cache module 204 is allocated in advance, but can dynamically adjust as requested, thereby avoids data packet loss.
5, packet capture module 205:
This module major function is to monitor by the packet of ICP/IP protocol stack; And according to address filter table, copy the packet that meets filtercondition, then store in the buffer memory of data cache module 204.In the present invention, based on existing protocol stack hook (hook) mechanism, realize.Current, the increase income virtualization software of main flow based on linux, as kernel virtual machine (KVM KernelVirtual Machine), Xen etc., all support hook mechanism.
In the present invention, the packet that first pretreatment module 202 in data monitoring module 201 sends data cache module 204 carries out pre-service, extracts packet essential information, comprises source object MAC, IP, size of data.203 of data statistic analysis modules are according to the result of pretreatment module 202, in conjunction with inbreak detection rule and malicious code rule carry out intrusion detection, malicious code analysis is processed.Then, statistical analysis module 203 shows by certain configuration requirement the result after processing with the page, according to alarm configuration requirement, to meeting the statistic analysis result display alarm page of alarm.
Corresponding with virtual machine flux monitoring system disclosed by the invention, the modules connection diagram that the invention discloses a kind of virtual machine flux monitoring system is as shown in Figure 3 known: on monitor of virtual machine 104, moving virtual machine A101, virtual machine B102, virtual machine C103.Wherein, virtual machine A101, virtual machine C103 intercom mutually by the ICP/IP protocol stack 206 of monitor of virtual machine VMM104, and meanwhile, virtual machine A101 also communicates by letter with outside network device 105 by ICP/IP protocol stack 206 with virtual machine C103.In virtual machine B102, be deployed with monitoring module 201.Monitoring module 201 includes pretreatment module 202 and statistical analysis module 203.Data cache module 204 is arranged in virtual machine monitor unit VMM104, and packet capture module 205 is arranged in the ICP/IP protocol stack 206 of monitor of virtual machine VMM104.Under this deployment architecture, communication flows between virtual machine A101 and virtual machine C103 can be monitored by the monitoring module 201 in virtual machine B102, meanwhile, the communication flows of 105 of virtual machine A101, virtual machine C103 and outside network devices also can be monitored by the monitoring module 201 in virtual machine B102.
Claims (5)
1. a virtual machine flux monitoring method, is characterized in that comprising the following steps:
Step 1: at the upper virtual machine that comprises monitoring module that starts of monitor of virtual machine (Virtual Machine Monitor, VMM), by kernel module loading interface, packet capture module and data cache module are loaded in kernel; Virtual machine monitoring module and data cache module are established a communications link; Monitoring module issues and filters address list to kernel, and monitoring module sends startup command to kernel;
Step 2: packet capture module is monitored data in ICP/IP protocol stack; According to address filter table duplicate packet, and store in the buffer memory of data cache module; Data cache module sends to monitoring module by data;
Step 3: monitoring module extracts the essential information of packet, statistical data analysis flow, shows statistic analysis result and alarm.
2. method for supervising according to claim 1, is characterized in that: the idiographic flow in described step 1 is as follows:
1., start after the virtual machine comprise monitoring module, monitoring module also starts operation;
2., monitoring module calls kernel module loading interface, loads packet capture module and data cache module to kernel;
3., data cache module and monitoring module connect;
4., monitoring module sends address filtering table to described data cache module;
5., monitoring module sends enabled instruction to described data cache module;
6., data cache module arranges kernel global variable value for starting.
3. method for supervising according to claim 1, is characterized in that: the idiographic flow of described step 2 is as follows:
1., data cache module judges described kernel global variable value, starts if, distributes a certain size buffer memory, and log-on data caching process process; Otherwise do not do any processing;
2., packet capture module judges described kernel global variable value, starts if, starts described packet capture mould, otherwise, do not do any processing;
3., packet capture module judges whether current ICP/IP protocol stack data packet addressed mates described address filtering table; Mate duplicate packet and store in the buffer memory of described data cache module; Otherwise, do not do any processing;
4., data buffer storage process judges in described buffer memory whether be empty, being connected that not empty reading cache data is also set up by described data cache module and described monitoring module sends data; Sky is left intact.
4. method for supervising according to claim 1, is characterized in that: the idiographic flow of described step 3 is as follows:
1., monitoring module is accepted the data that described data cache module is sent; And calling data pretreatment module extraction data packet head information, comprise source object MAC, source object IP, data package size;
2., monitoring module calls session traffic, the session content at statistical analysis module statistical data packet place, and analyzes intrusion behavior according to inbreak detection rule; According to malicious code rule detection malicious code;
3., statistical analysis module is according to output configuration requirement, output statistic analysis result, and shows at the page;
4., statistical analysis module is according to alarm configuration requirement, outputting alarm result, and showing at the page.
5. a virtual machine flux monitoring system, is characterized in that, described system comprises as lower module:
1., monitoring module: for disposing packet capture module, data cache module; Call pretreatment module and statistical analysis module; Establish a communications link with data cache module; Accept the packet that data cache module is sent, issue address filtering table, order to data cache module; Management and monitoring configuration;
2., pretreatment module: obtain described data packet head information, comprise source object MAC, source object IP, data package size;
3., statistical analysis module: the result for the pretreatment module to described is carried out statistical study, comprises session traffic statistics, session content reduction; According to inbreak detection rule, analyze intrusion behavior; According to malicious code rule detection malicious code; According to output configuration requirement and alarm configuration requirement, output statistic analysis result and alarm result, and show at the page;
4., packet capture module: for the packet at monitor of virtual machine (VMM) kernel monitoring ICP/IP protocol stack, and copy described packet according to described address filtering table; And store in the buffer memory of data cache module;
5., data cache module: for setting up and being connected of described monitoring module; Data in transmission institute buffer memory are to described monitoring module; Accept the instruction and data that described monitoring module sends.
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