CN114189547A - SSL tunnel fast switching method under cluster - Google Patents
SSL tunnel fast switching method under cluster Download PDFInfo
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- CN114189547A CN114189547A CN202210133178.8A CN202210133178A CN114189547A CN 114189547 A CN114189547 A CN 114189547A CN 202210133178 A CN202210133178 A CN 202210133178A CN 114189547 A CN114189547 A CN 114189547A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
- H04L67/148—Migration or transfer of sessions
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/27—Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
- H04L43/0817—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking functioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1004—Server selection for load balancing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/16—Implementing security features at a particular protocol layer
- H04L63/168—Implementing security features at a particular protocol layer above the transport layer
Abstract
The invention discloses a method for rapidly switching SSL tunnels under a cluster, which specifically comprises the following steps: s1) the gateway service module continuously writes different data for detection into the shared memory; the shared memory is a shared memory of which the gateway service module is a health detection module; s2) the health detection module reads the detection data in the shared memory, if the detection data read for many times are the same, the gateway service module is judged to be abnormal, and the information of the gateway service module abnormality is sent to the SSL agent module; s3), after receiving the abnormal information of the gateway service module, the SSL proxy module connects a new gateway and performs SSL tunnel switching. According to the invention, through the rapid detection capability of the health detection module, the rapid discovery of the fault is realized, the gateway switching can be carried out in time, and meanwhile, the gateway after switching is reconnected through the SSL agent module, so that the user can not feel the cluster gateway switching.
Description
Technical Field
The invention relates to the technical field of clusters. In particular to a method for rapidly switching SSL tunnels under a cluster.
Background
In the current society, information is rapidly expanding, a single access gateway cannot meet the requirements of users, and in order to ensure the experience of the users, the gateway often adopts a high availability technology, for example, a cluster technology is used, and a balancer provides load balancing for the cluster to provide services for the users, as shown in fig. 1. However, the problem of information security comes with the crisis of various data leakage, so that the concept of information security is more and more attentive, and then there is an urgent need to protect information reaching a gateway cluster and timely find a fault in a gateway.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to provide a method for fast switching SSL tunnels under a cluster, which realizes fast discovery of faults through fast detection capability of a health detection module, can perform gateway switching in time, and achieves no perception of a user on cluster gateway switching by reconnecting a switched gateway through an SSL proxy module.
In order to solve the technical problems, the invention provides the following technical scheme:
a SSL tunnel fast switching method under cluster, the gateway in the gateway cluster is equipped with the health detection module, gateway management module, gateway service module, shared memory, database management module and database module; after the client establishes connection with the gateway in the gateway cluster through the SSL proxy module, the SSL tunnel needs to be switched in time when the gateway service module has a problem, which specifically includes the following steps:
s1) the gateway service module continuously writes different data for detection into the shared memory; the shared memory is a shared memory of the gateway service module and the health detection module;
s2) the health detection module reads the detection data in the shared memory, if the detection data read for many times are the same, the gateway service module is judged to be abnormal, and the information of the gateway service module abnormality is sent to the SSL agent module;
s3), after receiving the abnormal information of the gateway service module, the SSL proxy module connects a new gateway and performs SSL tunnel switching.
In step S2), before the health detection module reads the detection data in the shared memory and before the gateway service module enters the special state each time, the gateway management module notifies the health detection module to cancel the detection of the gateway service module, and after the gateway service module exits the special state, the gateway management module notifies the health detection module to resume the detection of the gateway service module.
The SSL tunnel fast switching method under the cluster detects that the used data is 8 bytes of integer data; the gateway service module continuously performs self-increasing and self-decreasing operations on the integer data during normal operation, and the health detection module only needs to judge the state of the gateway service module according to the change of the integer data read for many times.
In the method for fast switching SSL tunnels under the cluster, in step S2), the health detection module continuously detects the existence of the gateway service module while detecting the operation state of the gateway service module.
According to the SSL tunnel fast switching method under the cluster, the SSL agent module transmits data and simultaneously sends heartbeat regularly to sense the state of the gateway.
According to the SSL tunnel fast switching method under the cluster, when the gateway service module is abnormal, the gateway service module exits from the gateway cluster.
According to the method for rapidly switching the SSL tunnel under the cluster, when the gateway in the gateway cluster is switched, the SSL agent module can timely sense the switching of the gateway through heartbeat and when a message is forwarded, and the SSL tunnel is established with a new gateway again.
The SSL tunnel fast switching method under the cluster further comprises the following steps:
s0) sorting the database modules in the gateways in one gateway cluster according to priority levels and setting the database module with the highest priority level as a master database module and the other database modules as slave database modules;
s4) the health detection module monitors the running state of the database module, and when the running of the database module is abnormal, the health detection module informs the database management module and the SSL agent module that the running state of the database module is abnormal;
s5) when the master database module is abnormal in operation, switching the slave database with the highest priority level in the slave database into the master database module, and keeping the rest slave databases as the slave database modules, and meanwhile, reconnecting the SSL agent module with the gateway where the database module set as the master database module is located and establishing an SSL tunnel, namely completing the switching of the SSL tunnel; and the master database module and the slave database module perform database data synchronization in a full-quantity synchronization and incremental synchronization mode.
According to the SSL tunnel fast switching method under the cluster, when the master database module and the slave database module carry out data synchronization, a copy of all data and a new data writing command are pulled from the master database module during initialization of the slave database module, all old data can be firstly discarded by the slave database module, all pulled data are loaded, and the new data writing command is executed, and then when the slave database module is written into the master database module each time, the master database module sends the writing command to all the slave database modules, and new data are synchronized into all the slave database modules; the client can only write data into the master database module and cannot directly write data into the slave database modules, but all the slave database modules support read operation. Wherein the new write data command is a new command to write data to the slave database module.
According to the SSL tunnel fast switching method under the cluster, when the priorities of more than or equal to 2 slave database modules are the same, the database module with the largest IP is selected as a main database module; in the process of switching the main database module, each database management module notifies the priority of each database module through VRRP, and meanwhile, the database management module in the gateway with abnormal database modules reports the abnormal operation of the database module to the health detection module, so that the health detection module can timely enable the gateway with abnormal operation of the database module to quit the gateway cluster, and the gateway with normal working state provides service for users.
The technical scheme of the invention achieves the following beneficial technical effects:
1. in the invention, when the gateway service module is in a special state, the gateway management module is used for informing the health detection module to avoid misjudgment of the health detection module.
2. In the invention, when the gateway in the cluster is switched, the SSL agent module is used for connecting a new gateway, and the reconnection operation is completed in the SSL agent module, so that a user cannot perceive the switching of the gateway.
3. In the invention, the health detection module periodically and quickly reads the shared memory, if the gateway fails, the failure can be found in a very short time, the switching of the gateway can be timely carried out, and the SSL agent can also quickly switch the SSL tunnel.
Drawings
FIG. 1 is a gateway cluster application scenario architecture diagram;
FIG. 2 is a schematic diagram of the operation of gateways in a gateway cluster according to the present invention;
FIG. 3 is a diagram of an application scenario architecture of the present invention;
FIG. 4 is a block diagram of the overall module relationship framework of the present invention.
Detailed Description
As shown in fig. 2 and fig. 3, the gateways in the gateway cluster used in the present invention are provided with a health detection module, a gateway management module, a gateway service module, a shared memory, a database management module, and a database module. The SSL agent module of the client is mainly responsible for establishing SSL short connection with the gateway service module, and after the gateways in the gateway cluster are switched, the SSL tunnels are quickly switched, and all data are interacted with the SSL tunnels established by the gateway service module through the SSL agent module; the gateway management module is responsible for managing the gateway service module; the health detection module is responsible for detecting the running state of the gateway, and when the gateway fails, the health detection module can quickly find and process the gateway; the database module is responsible for storing data and synchronizing the cluster database, and the database management module is responsible for master-slave switching of the database module, so that data can be prevented from being written into the database module in the fault gateway after SSL tunnel switching. In this embodiment, the gateways in the gateway cluster configure the VIP using the gateway management module, and all the gateways in the gateway cluster implement external services by using the VIP address that provides the same.
As shown in fig. 4, after the client establishes a connection with the gateway in the gateway cluster through the SSL proxy module, the SSL tunnel needs to be quickly switched in time when the gateway service module has a problem, which specifically includes the following steps:
s0) sorting the database modules in the gateways in one gateway cluster according to priority levels and setting the database module with the highest priority level as a master database module and the other database modules as slave database modules;
s1) the gateway service module continuously writes different data for detection into the shared memory; the shared memory is a shared memory of the gateway service module and the health detection module;
s2) the health detection module reads the detection data in the shared memory, if the detection data read for many times are the same, the gateway service module is judged to be abnormal, and the information of the gateway service module abnormality is sent to the SSL agent module; wherein, the frequency of reading and writing the shared memory can be properly adjusted to achieve the purpose of rapidly finding faults;
s3), after receiving the information of the gateway service module abnormality, the SSL agent module connects a new gateway and switches the SSL tunnel; when the gateway service module is abnormal, the gateway service module exits from the gateway cluster; the SSL agent module transmits data and simultaneously sends heartbeat at regular time to sense the state of the gateway, and when the gateway in the gateway cluster is switched, the SSL agent module can sense the switching of the gateway in time through the heartbeat and when a message is forwarded, and reestablish an SSL tunnel with a new gateway;
s4) the health detection module monitors the running state of the database module, and when the running of the database module is abnormal, the health detection module informs the database management module and the SSL agent module that the running state of the database module is abnormal;
s5) when the master database module is abnormal in operation, switching the slave database with the highest priority level in the slave database into the master database module, and keeping the rest slave databases as the slave database modules, and meanwhile, reconnecting the SSL agent module with the gateway where the database module set as the master database module is located and establishing an SSL tunnel, namely completing the switching of the SSL tunnel; the master database module and the slave database module perform database data synchronization in a full-quantity synchronization and incremental synchronization mode, wherein the synchronized data content comprises information such as service configuration of a gateway, configuration of SSL (secure sockets layer) certificates, user information, access control strategies and the like. When the priorities of more than or equal to 2 slave database modules are the same, selecting the database module with the largest IP as a master; in the process of switching the main database module, each database management module notifies the priority of each database module through VRRP, and meanwhile, the database management module in the gateway with abnormal database modules reports the abnormal operation of the database module to the health detection module, so that the health detection module can timely enable the gateway with abnormal operation of the database module to quit the gateway cluster, and the gateway with normal working state provides service for users.
When the database module in the gateway has an abnormal operation state, the gateway is also considered to have an abnormal operation state, and the switching of the gateway and the switching of the SSL tunnel need to be performed.
In step S2), before the health detection module reads the detection data in the shared memory, and before the gateway service module enters the special state each time, the gateway management module notifies the health detection module to cancel the detection of the gateway service module, and after the gateway service module exits the special state, the gateway management module notifies the health detection module to resume the detection of the gateway service module. And while detecting the running state of the gateway service module, the health detection module also continuously detects the existence of the gateway service module.
The detection data is 8 bytes of integer data; the gateway service module continuously performs self-increasing and self-decreasing operations on the integer data during normal operation, and the health detection module only needs to judge the state of the gateway service module according to the change of the integer data read for many times, so that the efficiency of the operation is ensured by using the least time-saving operation and the shortest data. When the size of the integer data does not exceed or reach 8 bytes, the integer data can be increased by itself, otherwise, the integer data can be decreased by itself, so as to ensure that the integer data written into the shared memory are different each time.
When the gateway is started, the master database module and the slave database module in the gateway cluster carry out data synchronization. After the gateway is successfully started, the SSL agent module can construct an SSL tunnel with the gateway service module of the gateway, so that the safety of data transmission is ensured. When the master database module and the slave database module carry out data synchronization, the slave database module pulls a copy of all data and a new data writing command to the master database module during initialization, the slave database module firstly discards all old data, loads all pulled data and executes a new data writing command, and then the master database module sends the writing command to all slave database modules and synchronizes new data to all slave database modules every time the master database module is written in; the client can only write data into the master database module and cannot directly write data into the slave database modules, but all the slave database modules support read operation, and the read operation load of the master database module is also shared.
After receiving the service data sent by the SSL proxy module, the gateway needs to write the service data into the database module to store data, such as the current session state, the current user state, and other information, so as to facilitate the front-end to query and display the service state of the gateway. The master database module informs all the slave database modules through the VRRP and informs the slave database modules of the addresses of the master database modules, and at the moment, the database management module can read the addresses of the master database modules from the database modules.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are possible which remain within the scope of the appended claims.
Claims (10)
1. A SSL tunnel fast switching method under cluster is characterized in that a gateway in a gateway cluster is provided with a health detection module, a gateway management module, a gateway service module, a shared memory, a database management module and a database module; after a client establishes connection with a gateway in a gateway cluster through an SSL proxy module, switching an SSL tunnel when a gateway service module has a problem, specifically comprising the following steps:
s1) the gateway service module continuously writes different data for detection into the shared memory; the shared memory is a shared memory of the gateway service module and the health detection module;
s2) the health detection module reads the detection data in the shared memory, if the detection data read for many times are the same, the gateway service module is judged to be abnormal, and the information of the gateway service module abnormality is sent to the SSL agent module;
s3), after receiving the abnormal information of the gateway service module, the SSL proxy module connects a new gateway and performs SSL tunnel switching.
2. The method as claimed in claim 1, wherein in step S2), before the health detection module reads the data for detection in the shared memory and before the gateway service module enters the special state each time, the gateway management module notifies the health detection module to cancel the detection of the gateway service module, and when the gateway service module exits the special state, the gateway management module notifies the health detection module to resume the detection of the gateway service module.
3. The SSL tunnel fast switching method under the cluster according to claim 1, wherein the detection data is an 8-byte integer data; the gateway service module continuously performs self-increasing and self-decreasing operations on the integer data during normal operation, and the health detection module judges the state of the gateway service module according to the change of the integer data read for many times.
4. The method for fast switching SSL tunnels under cluster according to claim 1, wherein in step S2), the health detection module continuously detects the existence of the gateway service module while detecting the running status of the gateway service module.
5. The SSL tunnel fast switching method under the cluster according to claim 1, wherein the SSL agent module sends heartbeat regularly while transmitting data to sense the gateway status.
6. The method for SSL tunnel fast switching under cluster according to claim 1, wherein when the gateway service module is abnormal, the gateway service module exits from the gateway cluster.
7. The method for fast switching the SSL tunnel under the cluster according to any one of claims 1 to 6, wherein when the gateway in the gateway cluster is switched, the SSL agent module senses the switching of the gateway through heartbeat and when a message is forwarded, and reestablishes the SSL tunnel with a new gateway.
8. The SSL tunnel fast switching method under the cluster according to any claim 1 to 6, further comprising the following steps:
s0) sorting the database modules in the gateways in one gateway cluster according to priority levels and setting the database module with the highest priority level as a master database module and the other database modules as slave database modules;
s4) the health detection module monitors the running state of the database module, and when the running of the database module is abnormal, the health detection module informs the database management module and the SSL agent module that the running state of the database module is abnormal;
s5) when the master database module is abnormal in operation, switching the slave database with the highest priority level in the slave database into the master database module, and keeping the rest slave databases as the slave database modules, and meanwhile, reconnecting the SSL agent module with the gateway where the database module set as the master database module is located and establishing an SSL tunnel, namely completing the switching of the SSL tunnel; and the master database module and the slave database module perform database data synchronization in a full-quantity synchronization and incremental synchronization mode.
9. The SSL tunnel fast switching method under the cluster as claimed in claim 8, wherein when the master database module and the slave database module perform data synchronization, a copy of all data and a new write data command are pulled from the master database module at the initialization of the slave database module, the slave database module will first discard all old data, load all pulled data, and execute the new write data command, after that, every time the master database module is written in, the master database module will send a write command to all slave database modules, and synchronize the new data into all slave database modules; the client can only write data into the master database module and cannot directly write data into the slave database modules, but all the slave database modules support read operation.
10. The SSL tunnel fast switching method under the cluster according to claim 9, characterized in that when there are more than or equal to 2 slave database modules with the same priority, the database module with the largest IP is selected as the master; in the process of switching the main database module, each database management module notifies the priority of each database module through VRRP, and meanwhile, the database management module in the gateway with abnormal database module reports the abnormal operation of the database module to the health detection module, and the health detection module enables the gateway with abnormal operation of the database module to exit the gateway cluster, so that the gateway with normal working state provides service for users.
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