CN112882895A - Health examination method, device, computer system and readable storage medium - Google Patents
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Abstract
The disclosure provides a health check method, which can be used in the technical field of cloud computing and information security or other fields. Wherein, the method comprises the following steps: sending a health check request aiming at a target link to an application server according to a first preset time interval, wherein the target link is a communication link between the application server and an application database; receiving response data sent by the application server in response to the health check request, wherein the response data is acquired by the application server from a dynamic page, the dynamic page is stored in the application server, the response data is displayed on the dynamic page, and the application server acquires data obtained by responding to the request for acquiring the target data from the application database according to a second preset time interval; and determining that the target link is in a healthy state in the case that the response data is the target data. The present disclosure also provides a health check device, a computer system, a readable storage medium, and a computer program product.
Description
Technical Field
The present disclosure relates to the field of cloud computing and information security technologies, and in particular, to a health check method, apparatus, computer system, readable storage medium, and computer program product.
Background
With the popularization of the mobile internet, the requirement of a user on high available resources is higher and higher, and the method can be suitable for scheduling by a load balancer to ensure that the user can access the available service processing resources all the time. When a device such as a load balancer is used to schedule access of a user, the health states of the application server and the application database need to be detected to judge whether to continuously distribute a user request to the corresponding application server.
In implementing the disclosed concept, the inventors found that there are at least the following problems in the related art: the load balancer will initiate a health check request for each user request, resulting in excessive resource consumption.
Disclosure of Invention
In view of the above, the present disclosure provides a health check method, apparatus, computer system, readable storage medium and computer program product.
One aspect of the present disclosure provides a health check method applied to a load balancer, including:
sending a health check request aiming at a target link to an application server according to a first preset time interval, wherein the target link is a communication link between the application server and an application database;
receiving response data sent by the application server in response to the health check request, wherein the response data is acquired by the application server from a dynamic page, the dynamic page is stored in the application server, the response data is displayed on the dynamic page, and the application server acquires data obtained by responding to the request for acquiring the target data from the application database according to a second preset time interval; and
and in the case that the response data is the target data, determining that the target link is in a healthy state.
According to an embodiment of the present disclosure, further comprising:
comparing the response data with target data prestored in the load balancer to determine whether the response data is the target data;
in the event that the response data is not the target data, it is determined that the target link is in an unhealthy state.
According to an embodiment of the present disclosure, further comprising:
acquiring a request for processing a service, which is sent by a user terminal;
determining a target application server in a healthy state in a polling mode; and sending a request for processing the service to the target application server.
According to an embodiment of the present disclosure, further comprising:
acquiring a request for processing a service, which is sent by a user terminal;
determining a target application server in a healthy state by adopting a minimum connection number mode; and
and sending the request for processing the service to the target application server.
Another aspect of the present disclosure also provides a health check method applied to an application server, including:
receiving a health check request aiming at a target link, which is sent by a load balancer according to a first preset time interval; the target link is a communication link between the application server and the application database; and
in response to the health check request, sending response data to the load balancer so that the load balancer determines the health state of the target link based on the response data; the response data is obtained by the application server from the dynamic page, the dynamic page is stored in the application server, the response data is displayed on the dynamic page, and the application server obtains the data aiming at the request of obtaining the target data from the application database according to a second preset time interval.
According to the embodiment of the disclosure, the target link is also connected with an application device;
the method further comprises the following steps:
sending a request for acquiring target data from an application database to the application equipment according to a preset second time interval; so that the application device responds to the request for acquiring the target data from the application database, and executes the operation of circularly traversing the application database to acquire the target data from the application database;
response data transmitted by the application device is received.
According to an embodiment of the present disclosure, further comprising:
the response data displayed on the dynamic page is updated in real time based on the newly acquired response data so that the updated response data is transmitted to the load balancer in response to the request for health check.
According to an embodiment of the present disclosure, wherein the response data obtained last includes one of: target data set in advance, data obtained by an error response, and response data whose data content is empty.
Yet another aspect of the present disclosure provides a health check device, including:
the system comprises a request module, a first application database and a second application database, wherein the request module is used for sending a health check request aiming at a target link to an application server according to a first preset time interval, and the target link is a communication link between the application server and the application database;
a first receiving module, configured to receive response data sent by the application server in response to the health check request, where the response data is obtained by the application server from a dynamic page, the dynamic page is stored in the application server, the response data is displayed on the dynamic page, and the application server obtains data for a request for obtaining target data from the application database at a second preset time interval; and
and the determining module is used for determining that the target link is in a healthy state under the condition that the response data is the target data.
Another aspect of the present disclosure provides a health check device, including:
the second receiving module is used for receiving a health check request aiming at the target link, which is sent by the load balancer according to a first preset time interval; the target link is a communication link between the application server and the application database; and
a response module, configured to send response data to the load balancer in response to the health check request, so that the load balancer determines a health status of the target link based on the response data; the response data is obtained by the application server from the dynamic page, the dynamic page is stored in the application server, the response data is displayed on the dynamic page, and the application server obtains the data aiming at the request of obtaining the target data from the application database according to a second preset time interval.
Yet another aspect of the present disclosure provides a computer system comprising:
one or more processors;
a memory for storing one or more programs,
wherein the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the health check method described above.
Yet another aspect of the present disclosure provides a computer-readable storage medium having stored thereon executable instructions that, when executed by a processor, cause the processor to implement the health check method described above.
Yet another aspect of the present disclosure provides a computer program product comprising a computer program comprising computer executable instructions for implementing the above-described health check method when executed.
According to the embodiment of the disclosure, the health check request for the target link is sent to the application server according to the first preset time interval, wherein the target link is a communication link between the application server and the application database; receiving response data sent by the application server in response to the health check request, wherein the response data is acquired by the application server from a dynamic page, the dynamic page is stored in the application server, the response data is displayed on the dynamic page, and the application server acquires data obtained by responding to the request for acquiring the target data from the application database according to a second preset time interval; and in the case that the response data is the target data, determining that the target link is in a healthy state, the present disclosure transmitting a health check request at a first preset time interval instead of transmitting a health check request based on a request for processing a service as a trigger; therefore, the technical problems that in the prior art, a large number of requests for processing services are simultaneously sent to the load balancer, and a large number of explosive health check requests are simultaneously sent to the application server, so that the application server suffers from large performance loss or resource waste are solved, and the technical effects of saving resource waste and improving application service performance are achieved.
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The above and other objects, features and advantages of the present disclosure will become more apparent from the following description of embodiments of the present disclosure with reference to the accompanying drawings, in which:
FIG. 1 schematically illustrates a health check system of an embodiment of the present disclosure;
FIG. 2 schematically illustrates an exemplary system architecture to which the health check method and apparatus of the present disclosure may be applied;
FIG. 3 schematically illustrates a flow chart of a health check method according to an embodiment of the present disclosure;
FIG. 4 schematically illustrates a flow diagram of a health check method according to another embodiment of the present disclosure;
FIG. 5 schematically illustrates a flow diagram of a health check method according to another embodiment of the present disclosure;
FIG. 6 schematically illustrates a block diagram of a health check device according to an embodiment of the present disclosure;
FIG. 7 schematically illustrates a block diagram of a health check device according to another embodiment of the present disclosure; and
FIG. 8 schematically illustrates a block diagram of a computer system suitable for implementing a health check method in accordance with an embodiment of the present disclosure.
Detailed Description
Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood that the description is illustrative only and is not intended to limit the scope of the present disclosure. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The terms "comprises," "comprising," and the like, as used herein, specify the presence of stated features, steps, operations, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, or components.
All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. It is noted that the terms used herein should be interpreted as having a meaning that is consistent with the context of this specification and should not be interpreted in an idealized or overly formal sense.
Where a convention analogous to "at least one of A, B and C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B and C" would include but not be limited to systems that have a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.). Where a convention analogous to "A, B or at least one of C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B or C" would include but not be limited to systems that have a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.).
Embodiments of the present disclosure provide a health check method. The method is applied to a load balancer and comprises the following steps: sending a health check request aiming at a target link to an application server according to a first preset time interval, wherein the target link is a communication link between the application server and an application database; receiving response data sent by the application server in response to the health check request, wherein the response data is acquired by the application server from a dynamic page, the dynamic page is stored in the application server, the response data is displayed on the dynamic page, and the application server acquires data obtained by responding to the request for acquiring the target data from the application database according to a second preset time interval; and determining that the target link is in a healthy state in the case that the response data is the target data.
Another embodiment of the present disclosure also provides a health check method. The method is applied to an application server and comprises the following steps: receiving a health check request aiming at a target link, which is sent by a load balancer according to a first preset time interval; the target link is a communication link between the application server and the application database; in response to the health check request, sending response data to the load balancer so that the load balancer determines the health state of the target link based on the response data; the response data is obtained by the application server from the dynamic page, the dynamic page is stored in the application server, the response data is displayed on the dynamic page, and the application server obtains the data aiming at the request of obtaining the target data from the application database according to a second preset time interval.
FIG. 1 schematically illustrates a health check system 100 of an embodiment of the present disclosure.
As shown in FIG. 1, a health check system 100 according to this embodiment may include a load balancer 101, an application server 102, and an application database 103.
The load balancer 101 is not limited to one, and may be a load balancer cluster. The load balancer 101 can be used for scheduling based on the request of the user, monitoring the health status of the link established between the application server 102 and the application database 103, and sending the request of the user to the application server of the healthy link, so as to play a role in scheduling and ensure that the user can access the available application resources all the time.
The application server 102, which may also be referred to as a backend server, is a server for providing various services, such as a backend management server (for example only) that provides query balances, transfers, and so on. The application server 102 may receive a request for service processing sent by the leveling server 101, and obtain data from the application database 103 and perform data processing based on the request.
According to an optional embodiment of the present disclosure, other application devices, for example, one or more devices of a security detection device, an APP server, a web server, and the like, are further connected in the full link established between the application server 102 and the application database 103.
And the application database 103 is used for storing data and supporting the application server 102 to perform operations such as adding, intercepting, updating, deleting and the like on the stored data. It should be noted that, in the embodiment of the present disclosure, the application database 103 may be multiple, and data is shared among multiple application databases.
It should be noted that fig. 1 is only an example of a health check system to which the embodiments of the present disclosure may be applied to help those skilled in the art understand the technical content of the present disclosure, and does not mean that the embodiments of the present disclosure may not be applied to other devices, systems, environments or scenarios.
FIG. 2 schematically illustrates an exemplary system architecture 200 to which the health check method and apparatus may be applied, according to an embodiment of the disclosure. It should be noted that fig. 2 is only an example of a system architecture to which the embodiments of the present disclosure may be applied to help those skilled in the art understand the technical content of the present disclosure, and does not mean that the embodiments of the present disclosure may not be applied to other devices, systems, environments or scenarios.
As shown in fig. 2, the system architecture 200 according to this embodiment may include terminal devices 201, 202, 203, a network 204, an application server 205, and a load balancer 206. The network 204 serves as a medium for providing communication links between the terminal devices 201, 202, 203, the application server 205 and the load balancer 206. Network 204 may include various connection types, such as wired and/or wireless communication links, and so forth.
A user may use terminal devices 201, 202, 203 to interact with load balancer 206 over network 204 to receive or send messages, etc. The terminal devices 201, 202, 203 may have installed thereon various communication client applications, such as a shopping-like application, a web browser application, a search-like application, an instant messaging tool, a mailbox client, and/or social platform software, etc. (by way of example only).
The terminal devices 201, 202, 203 may be various electronic devices having a display screen and supporting web browsing, including but not limited to smart phones, tablet computers, laptop portable computers, desktop computers, and the like.
The application server 205 may be a server providing various services, such as a background management server (for example only) providing support for websites browsed by users using the terminal devices 201, 202, 203. The backend management server may analyze and perform other processing on the received data such as the user request dispatched by the load balancer 206, and feed back the processing result (e.g., the web page, information, or data obtained or generated according to the user request) to the terminal device.
It should be noted that the health check method provided by the embodiment of the present disclosure may be generally executed by the application server 205. Accordingly, the health check device provided by the embodiment of the present disclosure may be generally disposed in the application server 205. The health check method provided by the embodiments of the present disclosure may also be performed by a server or a server cluster different from the application server 205 and capable of communicating with the terminal devices 201, 202, 203 and/or the application server 205. Accordingly, the health check apparatus provided by the embodiment of the present disclosure may also be disposed in a server or a server cluster different from the application server 205 and capable of communicating with the terminal devices 201, 202, 203 and/or the server 205. Alternatively, the health check method provided by the embodiment of the present disclosure may also be executed by the load balancer 206, or may also be executed by a server or a server cluster different from the load balancer 206 and capable of communicating with the terminal devices 201, 202, 203 and/or the load balancer 206. Accordingly, the health check apparatus provided by the embodiment of the present disclosure may also be disposed in the load balancer 206, or disposed in a server or a server cluster different from the load balancer 206 and capable of communicating with the terminal devices 201, 202, 203 and/or the load balancer 206.
For example, the target data may be originally stored in load balancer 206, or stored on an external storage device and may be imported into load balancer 206. The load balancer 206 may then send the target data to other application servers, or server clusters, and perform the health check method provided by the embodiments of the present disclosure by the other application servers, or server clusters, that receive the target data.
It should be understood that the number of terminal devices, networks, and servers in fig. 2 is merely illustrative. There may be any number of terminal devices, networks, and servers, as desired for implementation.
It should be noted that the health check method, the health check device, the computer system, the computer readable storage medium, and the computer program product of the present disclosure may be used in the fields of information security and cloud computing technology, and may also be used in any fields other than the fields of information security and cloud computing technology.
FIG. 3 schematically shows a flow chart of a health check method according to an embodiment of the present disclosure.
As shown in fig. 3, the method is applied to a load balancer, and includes operations S310 to S330.
In operation S310, a health check request for a target link is sent to an application server at a first preset time interval, wherein the target link is a communication link between the application server and an application database.
In operation S320, response data sent by the application server in response to the health check request is received, wherein the response data is obtained by the application server from a dynamic page, the dynamic page is stored in the application server, the response data is displayed on the dynamic page, and the response data is obtained by the application server for a request for obtaining target data from the application database at a second preset time interval.
In operation S330, in case the response data is the target data, it is determined that the target link is in a healthy state.
According to the embodiment of the disclosure, in order to meet the higher and higher availability requirements of the user on the accessed application and ensure that the user accesses the available resources all the time, the load balancer is adopted to schedule the access of the user in the embodiment of the disclosure. Before scheduling, the load balancer needs to monitor the health status of the application servers and the application database to determine whether to continue to distribute the user request to the corresponding application server.
In a conventional processing method, each load balancer performs health check on an application server, and a health check method generally includes sending a request to the application server in a manner of simulating a service processing request of a user after receiving the service processing request of the user, so as to confirm whether the application server can normally respond to the user request.
For the application server and the application database, the conventional processing method consumes a large amount of computing resources of the application server and the application database for the requests from a large number of distributed load balancers to respond to the health check requests of the load balancers. A large number of health check requests cause a large performance loss to the backend server, and in addition, in order to reduce the influence on the application server and the application database, the number of load balancers is also limited to be deployed, which is not beneficial to expansion.
Compared with the traditional health examination mode, the health examination method provided by the embodiment of the disclosure is more suitable for the development requirement of the distributed technical field.
According to the embodiment of the disclosure, the first preset time interval may be a second-order time interval, but is not limited to this, and may also be adjusted according to actual situations, but the second-order time interval, for example, 1 second, 5 seconds, or 10 seconds, is short, and can realize real-time monitoring.
According to the embodiment of the disclosure, the health check request is sent to the application server by the load balancer according to the preset time interval and is not sent based on the user request trigger. The method and the system prevent a large number of users (for example, 1 ten thousand users) from simultaneously and explosively sending requests for service processing to the load balancer, and then the load balancer sends corresponding number (1 ten thousand) of health check requests to the application server based on the requests, so that resources of a subsequent communication link are consumed by the health check requests, and the application server is prevented from triggering machine gun transaction to the application database by the aid of the overlarge number of health check requests.
According to the embodiment of the disclosure, the health check request is sent to the application server at the preset time interval, and under the condition that 1 ten thousand users inquire, the requests of 1 ten thousand users for service processing can be scheduled only based on the feedback information at the moment, so that the consumption of time and resources is saved.
According to the embodiment of the present disclosure, the response data sent by the application server in response to the health check request may be obtained by a dynamic page of the application server, but is not limited thereto, and may be stored in the application server in other ways as long as dynamic update based on update of the response data is realized.
According to the embodiment of the disclosure, the load balancer sends the health check request aiming at the target link to the application server according to the first preset time interval, but not sends the health check request under the trigger of the request sent by the terminal device, so that the problem that the performance of the application server and the application database is excessively consumed due to the fact that a large number of distributed load balancers repeatedly carry out health check on the application server and the application database is solved.
The method shown in fig. 3 is further described below with reference to specific embodiments.
According to the embodiment of the disclosure, the response data is compared with target data stored in the load balancer in advance to determine whether the response data is the target data;
and in the case that the response data is the target data, determining that the target link is in a healthy state.
In the event that the response data is not the target data, it is determined that the target link is in an unhealthy state.
According to the embodiment of the present disclosure, the target data may be data pre-stored in a database, the target data is a health check return data pre-agreed between the load balancer cluster and the application server cluster, and the data may be characters such as "success reply," but is not limited thereto, and may also be numbers or other identifiers.
According to the embodiment of the disclosure, whether the target link is in a healthy state can be determined by judging whether the response data is the target data. And under the condition that the response data is preset target data, the target link is in a healthy state, namely, the transaction capability of the application server and the application database can be considered to be normal.
According to the embodiment of the disclosure, in the case where the response data is not the target data, it is determined that the target link is in an unhealthy state. In this case, the response data may be data obtained by an error response, but is not limited to this, and may also be response data whose data content is empty. In the case where the target link is in an unhealthy state, the target link is not considered as a scheduling alternative.
According to the embodiment of the disclosure, the result of the health examination state is obtained in the mode, and the judgment is simple, easy and quick and is high in judgment speed.
According to an alternative embodiment of the present disclosure, the health check method may further include the following operations.
Acquiring a request for processing a service, which is sent by a user terminal; determining a target application server in a healthy state in a polling mode; and sending a request for processing the service to the target application server.
According to the embodiment of the disclosure, in the case of a request for processing a service involving a plurality of users, or in the case of a plurality of application servers with the same processing capability in a cluster of application servers, a target application server may be determined in a polling manner, and the request for processing the service may be sent to the target application server in a healthy state and having processing resources.
According to the embodiment of the disclosure, a polling mode is adopted, so that the phenomenon that a single application server is overloaded due to excessive processing amount is avoided, the data transmission safety is improved, and data loss is prevented.
According to an alternative embodiment of the present disclosure, the health check method may further include the following operations.
Acquiring a request for processing a service, which is sent by a user terminal; determining a target application server in a healthy state by adopting a minimum connection number mode; and sending a request for processing the service to the target application server.
According to the embodiment of the disclosure, in the case of a request for processing a service involving a plurality of users, or in the case of a plurality of application servers having the same processing capability in a cluster of application servers, a target application server may be determined in a manner of a minimum number of connections. The number of connections may be understood as the number of requests sent by the load balancer to process traffic scheduled to be sent to the application server, one for each transmission. In this way, the load balancer can count the number of processes per application server. And determining the application server with the minimum connection number as the target server based on the connection number of each application server.
According to the embodiment of the disclosure, the request sent by the user can be reasonably scheduled by adopting the mode of the minimum connection number, the overall user request processing speed is improved, and the requirement of high availability is realized.
FIG. 4 schematically shows a flow diagram of a health check method according to another embodiment of the present disclosure.
As shown in fig. 4, the method is applied to an application server, and includes operations S410 to S420.
Receiving a health check request for a target link transmitted by a load balancer at a first preset time interval in operation 410; the target link is a communication link between the application server and the application database.
At operation 420, in response to the health check request, sending response data to the load balancer, such that the load balancer determines a health status of the target link based on the response data; the response data is obtained by the application server from the dynamic page, the dynamic page is stored in the application server, the response data is displayed on the dynamic page, and the application server obtains the data aiming at the request of obtaining the target data from the application database according to a second preset time interval.
According to an embodiment of the present disclosure, a dynamic page is deployed on an application server, the dynamic page displaying response data. The response data is data obtained by the application server for a request to obtain the target data in the application database at a second preset time interval.
According to the embodiment of the disclosure, the second preset time interval may be a second-order time interval, but is not limited to this, and may also be adjusted according to the actual situation, but the second-order time interval, for example, 1 second, 5 seconds, or 10 seconds, is short, and can embody real-time performance. In an alternative embodiment of the present disclosure, the first preset time interval and the second preset time interval may be set to coincide.
According to an embodiment of the present disclosure, a text box may be provided on the dynamic page, and the response data is displayed by being input into the text box.
According to an embodiment of the present disclosure, the health check request may be an HTTP request. And the application server responds to the health check request sent by the load balancer, and sends the whole current dynamic page with response data to the load balancer as the return data of the HTTP request. However, the health check request may also be a request in another format, and the application server may send the corresponding response data in the text box of the dynamic page to the load balancer only as the return data. The present disclosure is not limited specifically, and the setting may be performed by itself according to the actual situation, as long as the dynamic page can be dynamically displayed.
According to the embodiment of the disclosure, the application server obtains the response data for the request for acquiring the target data from the application database according to the second preset time interval, and the data is continuously and repeatedly acquired from the application database without aiming at the health check requests initiated by the plurality of load balancers. The machine gun transaction request is not required to be initiated to the application database due to the triggering of the health check request initiated by the load balancer, so that the resource consumption is saved, and the efficiency is improved.
The health check method shown in fig. 4 will be further described with reference to the specific embodiment.
According to the embodiment of the disclosure, the target link is also connected with an application device; the application device may be a security detection device, but is not limited thereto, and may also be various APP application servers, or a web server.
According to an embodiment of the present disclosure, the health check method may further include the following operations.
Sending a request for acquiring target data from an application database to the application equipment according to a preset second time interval; so that the application device responds to the request for acquiring the target data from the application database, and executes the operation of circularly traversing the application database to acquire the target data from the application database; response data transmitted by the application device is received.
According to the embodiment of the disclosure, the application server sends a request for acquiring the target data from the application database to the application device, and the application device, in response to the request, cycles through the application database according to a preset second time interval to acquire the target data in the application database. The application device then sends the response data to the application server for display by the application server on the dynamic page.
According to the embodiment of the disclosure, the health check is carried out on the communication of the application equipment connected to the target link in the mode, and the mode of multi-layer proxy is realized, so that the check is comprehensive and effective. In addition, the resource consumption of the whole link for health check is reduced by sending a request for acquiring the target data from the application database to the application device at the second preset time interval.
According to an embodiment of the present disclosure, the health check method may further include the following operations.
The response data displayed on the dynamic page is updated in real time based on the newly acquired response data so that the updated response data is transmitted to the load balancer in response to the request for health check.
According to the embodiment of the disclosure, the response data is displayed through the dynamic page, and the response data can be matched with the acquired response data in a real-time updating mode, so that the hysteresis of information transmission is reduced, and the accuracy of health examination is improved.
According to an embodiment of the present disclosure, the newly acquired response data may include preset target data that characterizes the target link as a healthy state. However, without being limited thereto, when the target link is in an unhealthy state, the response data acquired last may be data obtained by an erroneous response or response data having empty data content.
FIG. 5 schematically shows a flow diagram of a health check method according to another embodiment of the present disclosure.
As shown in FIG. 5, the health check method includes operations S510 to S560.
In operation S510, a default health check return character, such as "success reply," is defined between the application servers and the cluster of all load balancers.
In operation S520, the load balancer initiates a health check request.
In operation S530, a timed dynamic page is deployed on the application server, and the default characters are retrieved from the dynamic page into the application database in the dimension of seconds.
In operation S540, the load balancer determines whether the health state is normal.
In operation S550, if the agreed return character is acquired, the health status is normal, and the transaction capability between the application server and the application database may be considered to be normal. And sending the request for processing the service sent by the user to the target application server of which the corresponding target link is in a healthy state.
In operation S560, if the application server or the application database is abnormal, the dynamic page cannot obtain the default character or returns an error character. The cluster of load balancers also cannot get a dynamic return of the application servers.
It should be noted that the load balancer may send the health check request to multiple application servers at the same time, or may send the health check request to only one application server, and when the target link is determined to be in the unhealthy state, operation S560 may be executed subsequently, and send the health check request to another application server in a polling manner, so as to send the request of the user for processing the service to the corresponding target application server whose target link is in the healthy state.
The health check method provided by the embodiment of the disclosure can simplify the service capability of the business representing the target full link by using the appointed characters, simultaneously optimizes a large number of requests triggered by the health check into dynamic value requests which can be accepted by the application database of the application server, and retrieves and displays the content of the application database on the dynamic page. The application server does not need to repeatedly process multiple load balancer-initiated health check requests, but responds with locally stored dynamic page content. Meanwhile, the application server does not trigger the machine gun transaction request to the application database by the health check request initiated by the multiple load balancing devices any more, and the application server replaces the machine gun transaction request with a dynamic value taking request acceptable by the application database, and retrieves and displays the content of the application database on a dynamic page.
In summary, the health check method provided by the embodiment of the present disclosure reduces the number of repeated health checks performed by the load balancer on the application server and the application database, and improves the performance, expandability, maintainability, and fault-tolerant capability of the distributed system to the maximum extent.
FIG. 6 schematically shows a block diagram of a health check device according to an embodiment of the present disclosure.
As shown in FIG. 6, the health check device 600 includes a request module 610, a first receiving module 620, and a determination module 630.
A request module 610, configured to send a health check request for a target link to an application server according to a first preset time interval, where the target link is a communication link between the application server and an application database;
a first receiving module 620, configured to receive response data sent by the application server in response to the health check request, where the response data is obtained by the application server from a dynamic page, the dynamic page is stored in the application server, the response data is displayed on the dynamic page, and the application server obtains data for a request for obtaining target data from the application database according to a second preset time interval; and
a determining module 630, configured to determine that the target link is in a healthy state if the response data is the target data.
According to an embodiment of the present disclosure, the health check device 600 further comprises a comparison module and a second determination module.
The comparison module is used for comparing the response data with target data prestored in the load balancer to determine whether the response data is the target data;
and the second determination module is used for determining that the target link is in the unhealthy state under the condition that the response data is not the target data.
According to an embodiment of the present disclosure, the health check device 600 further includes an obtaining module, a third determining module and a first sending module.
The acquisition module is used for acquiring a request which is sent by a user terminal and used for processing a service;
the third determining module is used for determining the target application server in a healthy state in a polling mode; and
and the first sending module is used for sending the request for processing the service to the target application server.
According to an embodiment of the present disclosure, the health check device 600 further includes a second obtaining module, a fourth determining module, and a second sending module.
The second acquisition module is used for acquiring a request which is sent by the user terminal and used for processing the service;
the fourth determining module is used for determining the target application server in a healthy state in a mode of minimum connection number; and
and the second sending module is used for sending the request for processing the service to the target application server.
FIG. 7 schematically shows a block diagram of a health check device according to another embodiment of the present disclosure.
As shown in fig. 7, the health check device 700 includes a second receiving module 710 and a response module 720.
A second receiving module 710, configured to receive a health check request for a target link sent by a load balancer at a first preset time interval; the target link is a communication link between the application server and the application database; and
a response module 720, configured to send response data to the load balancer in response to the health check request, so that the load balancer determines the health status of the target link based on the response data; the response data is obtained by the application server from the dynamic page, the dynamic page is stored in the application server, the response data is displayed on the dynamic page, and the application server obtains the data aiming at the request of obtaining the target data from the application database according to a second preset time interval.
According to the embodiment of the disclosure, the target link is also connected with an application device;
the health check device 700 further comprises a third transmitting module and a third receiving module.
The third sending module is used for sending a request for acquiring the target data from the application database to the application device according to a preset second time interval; so that the application device responds to the request for acquiring the target data from the application database, and executes the operation of circularly traversing the application database to acquire the target data from the application database;
and the third receiving module is used for receiving the response data sent by the application equipment.
According to an embodiment of the present disclosure, the health check device 700 further comprises an update module.
And the updating module is used for updating the response data displayed on the dynamic page in real time based on the latest acquired response data so as to send the updated response data to the load balancer under the condition of responding to the request for health check.
According to the embodiment of the present disclosure, the response data obtained most recently may be the target data set in advance, but is not limited thereto, and may also be data obtained by an error response or response data whose data content is empty.
Any number of modules, sub-modules, units, sub-units, or at least part of the functionality of any number thereof according to embodiments of the present disclosure may be implemented in one module. Any one or more of the modules, sub-modules, units, and sub-units according to the embodiments of the present disclosure may be implemented by being split into a plurality of modules. Any one or more of the modules, sub-modules, units, sub-units according to embodiments of the present disclosure may be implemented at least in part as a hardware circuit, such as a Field Programmable Gate Array (FPGA), a Programmable Logic Array (PLA), a system on a chip, a system on a substrate, a system on a package, an Application Specific Integrated Circuit (ASIC), or may be implemented in any other reasonable manner of hardware or firmware by integrating or packaging a circuit, or in any one of or a suitable combination of software, hardware, and firmware implementations. Alternatively, one or more of the modules, sub-modules, units, sub-units according to embodiments of the disclosure may be at least partially implemented as a computer program module, which when executed may perform the corresponding functions.
For example, any plurality of the request module 610, the first receiving module 620 and the determining module 630, or the second receiving module 710 and the responding module 720 may be combined and implemented in one module/unit/sub-unit, or any one of the modules/units/sub-units may be split into a plurality of modules/units/sub-units. Alternatively, at least part of the functionality of one or more of these modules/units/sub-units may be combined with at least part of the functionality of other modules/units/sub-units and implemented in one module/unit/sub-unit. According to an embodiment of the present disclosure, at least one of the request module 610, the first receiving module 620, and the determining module 630, or the second receiving module 710 and the responding module 720 may be at least partially implemented as a hardware circuit, such as a Field Programmable Gate Array (FPGA), a Programmable Logic Array (PLA), a system on a chip, a system on a substrate, a system on a package, an Application Specific Integrated Circuit (ASIC), or may be implemented by hardware or firmware in any other reasonable manner of integrating or packaging a circuit, or implemented by any one of three implementations of software, hardware, and firmware, or an appropriate combination of any several of them. Alternatively, at least one of the requesting module 610, the first receiving module 620 and the determining module 630, or the second receiving module 710 and the responding module 720 may be at least partially implemented as a computer program module, which when executed, may perform a corresponding function.
It should be noted that the health check device part in the embodiment of the present disclosure corresponds to the health check method part in the embodiment of the present disclosure, and the description of the health check device part specifically refers to the health check method part, which is not described herein again.
FIG. 8 schematically illustrates a block diagram of a computer system suitable for implementing the above-described method, according to an embodiment of the present disclosure. The computer system illustrated in FIG. 8 is only one example and should not impose any limitations on the scope of use or functionality of embodiments of the disclosure.
As shown in fig. 8, a computer system 800 according to an embodiment of the present disclosure includes a processor 801 that can perform various appropriate actions and processes according to a program stored in a Read Only Memory (ROM)802 or a program loaded from a storage section 808 into a Random Access Memory (RAM) 803. The processor 801 may include, for example, a general purpose microprocessor (e.g., a CPU), an instruction set processor and/or associated chipset, and/or a special purpose microprocessor (e.g., an Application Specific Integrated Circuit (ASIC)), among others. The processor 801 may also include onboard memory for caching purposes. The processor 801 may include a single processing unit or multiple processing units for performing different actions of the method flows according to embodiments of the present disclosure.
In the RAM 803, various programs and data necessary for the operation of the system 800 are stored. The processor 801, the ROM 802, and the RAM 803 are connected to each other by a bus 804. The processor 801 performs various operations of the method flows according to the embodiments of the present disclosure by executing programs in the ROM 802 and/or RAM 803. Note that the programs may also be stored in one or more memories other than the ROM 802 and RAM 803. The processor 801 may also perform various operations of method flows according to embodiments of the present disclosure by executing programs stored in the one or more memories.
According to embodiments of the present disclosure, method flows according to embodiments of the present disclosure may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product comprising a computer program embodied on a computer readable storage medium, the computer program containing program code for performing the method illustrated by the flow chart. In such an embodiment, the computer program can be downloaded and installed from a network through the communication section 809 and/or installed from the removable medium 811. The computer program, when executed by the processor 801, performs the above-described functions defined in the system of the embodiments of the present disclosure. The systems, devices, apparatuses, modules, units, etc. described above may be implemented by computer program modules according to embodiments of the present disclosure.
The present disclosure also provides a computer-readable storage medium, which may be contained in the apparatus/device/system described in the above embodiments; or may exist separately and not be assembled into the device/apparatus/system. The computer-readable storage medium carries one or more programs which, when executed, implement the method according to an embodiment of the disclosure.
According to an embodiment of the present disclosure, the computer-readable storage medium may be a non-volatile computer-readable storage medium. Examples may include, but are not limited to: a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present disclosure, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
For example, according to embodiments of the present disclosure, a computer-readable storage medium may include the ROM 802 and/or RAM 803 described above and/or one or more memories other than the ROM 802 and RAM 803.
Embodiments of the present disclosure also include a computer program product comprising a computer program containing program code for performing the method provided by the embodiments of the present disclosure, when the computer program product is run on an electronic device, the program code being adapted to cause the electronic device to carry out the method of health check provided by the embodiments of the present disclosure.
The computer program, when executed by the processor 801, performs the above-described functions defined in the system/apparatus of the embodiments of the present disclosure. The systems, apparatuses, modules, units, etc. described above may be implemented by computer program modules according to embodiments of the present disclosure.
In one embodiment, the computer program may be hosted on a tangible storage medium such as an optical storage device, a magnetic storage device, or the like. In another embodiment, the computer program may also be transmitted in the form of a signal on a network medium, distributed, downloaded and installed via communication section 809, and/or installed from removable media 811. The computer program containing program code may be transmitted using any suitable network medium, including but not limited to: wireless, wired, etc., or any suitable combination of the foregoing.
In accordance with embodiments of the present disclosure, program code for executing computer programs provided by embodiments of the present disclosure may be written in any combination of one or more programming languages, and in particular, these computer programs may be implemented using high level procedural and/or object oriented programming languages, and/or assembly/machine languages. The programming language includes, but is not limited to, programming languages such as Java, C + +, python, the "C" language, or the like. The program code may execute entirely on the user computing device, partly on the user device, partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. Those skilled in the art will appreciate that various combinations and/or combinations of features recited in the various embodiments and/or claims of the present disclosure can be made, even if such combinations or combinations are not expressly recited in the present disclosure. In particular, various combinations and/or combinations of the features recited in the various embodiments and/or claims of the present disclosure may be made without departing from the spirit or teaching of the present disclosure. All such combinations and/or associations are within the scope of the present disclosure.
The embodiments of the present disclosure have been described above. However, these examples are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although the embodiments are described separately above, this does not mean that the measures in the embodiments cannot be used in advantageous combination. The scope of the disclosure is defined by the appended claims and equivalents thereof. Various alternatives and modifications can be devised by those skilled in the art without departing from the scope of the present disclosure, and such alternatives and modifications are intended to be within the scope of the present disclosure.
Claims (13)
1. A health check method is applied to a load balancer and comprises the following steps:
sending a health check request aiming at a target link to an application server according to a first preset time interval, wherein the target link is a communication link between the application server and an application database;
receiving response data sent by the application server in response to the health check request, wherein the response data is obtained by the application server from a dynamic page, the dynamic page is stored in the application server, the response data is displayed on the dynamic page, and the response data is obtained by the application server according to a second preset time interval aiming at the request of obtaining target data in the application database; and
determining that the target link is in a healthy state if the response data is the target data.
2. The method of claim 1, further comprising:
comparing the response data with the target data prestored in the load balancer to determine whether the response data is the target data;
determining that the target link is in an unhealthy state if the response data is not the target data.
3. The method of claim 1, further comprising:
acquiring a request for processing a service, which is sent by a user terminal;
determining a target application server in a healthy state in a polling mode; and
and sending the request for processing the service to the target application server.
4. The method of claim 1, further comprising:
acquiring a request for processing a service, which is sent by a user terminal;
determining a target application server in a healthy state by adopting a minimum connection number mode; and
and sending the request for processing the service to the target application server.
5. A health check method is applied to an application server and comprises the following steps:
receiving a health check request aiming at a target link, which is sent by a load balancer according to a first preset time interval; wherein the target link is a communication link between the application server and an application database; and
in response to the health check request, sending response data to the load balancer for the load balancer to determine a health status of the target link based on the response data; the response data is obtained by the application server from a dynamic page, the dynamic page is stored in the application server, the response data is displayed on the dynamic page, and the application server obtains data according to a request of obtaining target data from the application database according to a second preset time interval.
6. The method of claim 5, wherein an application device is further connected to the target link;
the method further comprises the following steps:
sending a request for acquiring target data from the application database to the application device according to a preset second time interval; the application device responds to the request for acquiring the target data from the application database, and executes the operation of circularly traversing the application database to acquire the target data from the application database;
receiving the response data sent by the application device.
7. The method of claim 5 or 6, further comprising:
and updating the response data displayed on the dynamic page in real time based on the latest acquired response data so as to send the updated response data to the load balancer under the condition of responding to the request for health check.
8. The method of claim 7, wherein the newly acquired response data comprises one of: target data set in advance, data obtained by an error response, and response data whose data content is empty.
9. A health check device comprising:
the system comprises a request module, a first application module and a second application module, wherein the request module is used for sending a health check request aiming at a target link to an application server according to a first preset time interval, and the target link is a communication link between the application server and an application database;
a first receiving module, configured to receive response data sent by the application server in response to the health check request, where the response data is obtained by the application server from a dynamic page, the dynamic page is stored in the application server, the response data is displayed on the dynamic page, and the application server obtains data for a request for obtaining target data from the application database at a second preset time interval; and
a determining module, configured to determine that the target link is in a healthy state if the response data is the target data.
10. A health check device comprising:
the second receiving module is used for receiving a health check request aiming at the target link, which is sent by the load balancer according to a first preset time interval; wherein the target link is a communication link between the application server and an application database; and
a response module, configured to send response data to the load balancer in response to the health check request, so that the load balancer determines a health status of the target link based on the response data; the response data is obtained by the application server from a dynamic page, the dynamic page is stored in the application server, the response data is displayed on the dynamic page, and the application server obtains data according to a request of obtaining target data from the application database according to a second preset time interval.
11. A computer system, comprising:
one or more processors;
a memory for storing one or more programs,
wherein the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method of any one of claims 1-4 or 5-8.
12. A computer readable storage medium having stored thereon executable instructions which, when executed by a processor, cause the processor to carry out the method of any one of claims 1 to 4 or 5 to 8.
13. A computer program product comprising a computer program comprising computer executable instructions for implementing the method of any one of claims 1 to 4 or 5 to 8 when executed.
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