JP5936260B2 - Operation site switching system, operation site switching device, operation site switching method, and operation site switching program - Google Patents

Description

  The present invention relates to an operation site switching system, an operation site switching device, an operation site switching method, and an operation site switching program that can automatically switch a connection destination when a failure occurs in a connection destination system.

  Conventionally, a cluster system is known that can efficiently process messages from a plurality of load balancers even when a node server does not operate normally (see, for example, Patent Document 1). In the invention described in Patent Document 1, each of the three node servers included in the cluster system connected to the two load balancers includes session node information that associates the session ID with the node server in charge, and node life / death information. Is stored. When the cluster system receives a message sent from any one of the load balancers, it determines whether the function of the node server responsible for the message session is operating normally and replaces the node server responsible for the session. Update session node information to change to a node server. Then, data indicating the alternative node server is transmitted to a load balancer other than the load balancer that transmitted the message.

  In data communication via multiple load balancers, even if a node server does not operate normally, multiple load balancers can distribute messages belonging to the same session or related sessions to the same cluster node. And can process messages efficiently.

JP 2007-15669 A

  By the way, in a system configuration using the server / client system, two systems of servers are prepared, and when one system server fails, the operation can be continued by switching to the other system server. It has been broken. In such a system configuration, a load balancer is provided between the server and the client, and when a failure occurs, the client is connected to the server of the system where the load balancer is not broken, so that the client is connected to the server. Work can continue even if a failure occurs.

  However, in the configuration in which a load balancer is provided between the server and the client, there is a problem that a cost for introducing the load balancer is necessary and a cost for maintaining the load balancer is necessary. Further, in the configuration in which the load balancer switches the servers, there is a problem that the advantage of providing two systems of servers cannot be utilized when the load balancer fails.

  The present invention has been made in view of such circumstances. In a server-client system including a plurality of servers, an operation site switching system and an operation site switching that can perform connection switching that does not require a load balancer. An object is to provide an apparatus, an operation site switching method, and an operation site switching program.

  The present invention switches a terminal to be connected to a system at a predetermined operation site, a failure detection means for detecting a failure of the system at the operation site, and a system to be connected when a failure is detected by the failure detection means. Switching command transmission means for transmitting to the terminal connected to the operation site an automatic switching command including information necessary for the terminal, and the terminal receives the automatic switching command when the terminal receives the automatic switching command. The system to be connected is switched by referring to the information necessary for switching the system to be connected included in the automatic switching command.

  The present invention connects to a system of a predetermined operation site, and when receiving an automatic switching command, refers to information necessary for switching a system to be connected included in the received automatic switching command, and An operation site switching device that transmits the automatic switching command to a terminal that switches a system to be executed, wherein a failure detection unit that detects a failure of the system at the operation site and a failure detected by the failure detection unit And switching command transmission means for transmitting an automatic switching command including information necessary for switching the system to be connected to the terminal connected to the operation site.

  The present invention is an operation site switching method performed by an operation site switching system including a terminal connected to a system at a predetermined operation site, a failure detection unit, and a switching command transmission unit, wherein the failure detection unit includes the operation A failure detection step for detecting a failure of a system at a site; and an automatic switching command including information necessary for switching a system to be connected when the switching command transmission means detects a failure in the failure detection step. A switching command transmission step for transmitting to the terminal connected to the operation site, and when the terminal receives the automatic switching command, the system to be connected included in the received automatic switching command is switched. Switching step for switching the system to be connected with reference to the information necessary for Characterized in that it has and.

  The present invention connects to a system of a predetermined operation site, and when receiving an automatic switching command, refers to information necessary for switching a system to be connected included in the received automatic switching command, and An operation site switching method performed by an operation site switching device that transmits the automatic switching command to a terminal that switches a system to be performed, a failure detection step for detecting a system failure in the operation site, and the failure detection means A switching command transmission step of transmitting an automatic switching command including information necessary for switching a system to be connected to the terminal connected to the operation site when a failure is detected by And

  The present invention connects to a system of a predetermined operation site, and when receiving an automatic switching command, refers to information necessary for switching a system to be connected included in the received automatic switching command, and A failure detection step for detecting a failure of the system at the operation site is detected in the computer on the operation site switching device that transmits the automatic switching command to a terminal for switching the system to be detected, and the failure is detected by the failure detection means. In this case, a switching command transmission step of transmitting an automatic switching command including information necessary for switching a system to be connected to the terminal connected to the operation site is performed.

  According to the present invention, when logging in to the device management system from the terminal, the system management server periodically monitors the servers constituting the device management system of the site to be operated, and the server has an abnormality such as a failure. If this occurs, after the login to the switching destination site is enabled, a switching command is issued from the Web server to the logged-in terminal, and the terminal receives this command and is necessary for automatic switching included in this command. Automatic switching can be performed based on the information. This eliminates the need for a device for switching login destinations such as a load balancer as in the prior art, and can reduce the introduction cost, maintenance cost, and the like.

It is a block diagram which shows the structure of one Embodiment of this invention. It is a flowchart which shows operation | movement of the apparatus shown in FIG. It is explanatory drawing which shows the structure of the state file shown in FIG.

  Hereinafter, an operation site switching system according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the embodiment. In this figure, reference numerals 1, 2, 3 and 4 denote server / client type client terminals (hereinafter referred to as terminals), which are constituted by personal computers, for example. Reference numeral 5 denotes a network.

  Reference numeral 6 denotes an apparatus management system that manages and operates a wavelength division multiplexing transmission apparatus that is a management target apparatus, and includes four servers. Reference numeral 61 denotes a Web server connected to the network 5 and performs information communication with each of the terminals 1 to 4. Reference numeral 62 denotes an application server that executes an application. Reference numeral 63 denotes a database server that includes a database and reads and writes data. Reference numeral 64 denotes a system management server that manages the operation of each server. Reference numeral 65 denotes a state file that stores system state information.

  Reference numeral 7 denotes an apparatus management system that manages and operates a wavelength division multiplexing transmission apparatus that is a management target apparatus, and includes four servers. The device management system 7 has the same configuration as the device management system 6 and performs device management work in place of the device management system 6 when the device management system 6 fails. Reference numeral 71 denotes a Web server connected to the network 5 and performs information communication with each of the terminals 1 to 4. Reference numeral 72 denotes an application server that executes an application. Reference numeral 73 denotes a database server that includes a database and reads and writes data. Reference numeral 74 denotes a system management server that manages the operation of each server. Reference numeral 75 denotes a state file that stores system state information.

  The device management system 6 operates as a Web site for the terminals 1 to 4. The terminals 1 to 4 use the Web site provided by the device management system 6 to perform operations for registering device information and opening paths. In addition, the terminals 1 to 4 also perform centralized monitoring and control of the link network configured by the wavelength multiplexing transmission apparatus. The terminals 1 to 4 cooperate with other systems (not shown) to grasp the path configuration including the service node information and the line information such as optical cores, thereby allowing the users of the terminals 1 to 4 (transmission line operators). ) Is used to speed up the failure countermeasures for the transmission line operated by Here, the site normally provided by the device management system 6 is referred to as an operation site. A site provided by the device management system 7 is referred to as a backup site.

  The system management server 64 monitors the processing operations of the servers (Web server 61, application server 62, and database server 63) that constitute the device management system 6, and at the same time the servers (Web server 71, application server) that constitute the device management system 7. 72, the processing operation of the database server 73) is also monitored. Similarly, the system management server 74 monitors the processing operations of the servers (Web server 71, application server 72, database server 73) constituting the device management system 7, and also servers (Web server 61) constituting the device management system 6. The processing operations of the application server 62 and the database server 63) are also monitored.

  The terminals 1 to 4 are terminals provided by the operators of the device management systems 6 and 7, and predetermined software is stored in the storage device in each of the terminals 1 to 4. FIG. 1 shows an example in which different users (transmission channel operators) use four terminals, but the number of terminals is not limited to four, and five or more terminals can be used by different users. You may make it operate. One user may use a plurality of terminals. However, at least the same software provided by the operators of the device management systems 6 and 7 is stored in the storage device of each terminal.

  Next, processing operations of the terminal and each server shown in FIG. 1 will be described with reference to FIG. FIG. 2 is a flowchart showing processing operations of the terminal and each server shown in FIG. Here, although it demonstrates as what uses the terminal 1, the processing operation of another terminal is also the same. First, the system management server 64 performs state confirmation (normality confirmation and failure detection) (step S1). The normality confirmation is confirmation that an operation (select statement) to the database server 63 can be executed and that the state of the login destination site can be logged in. Failure detection includes process down and OS (Operating System) down of Web server 61, application server 62, and database server 63, network failure between Web server 61, application server 62, and database server 63, search engine of database server 63. Failure.

  The status of the login destination site is checked with reference to the status file 65. Here, the state file 65 will be described. FIG. 3 is a diagram showing a table structure of the status files 65 and 75 shown in FIG. As shown in FIG. 3, the site state after the transition and the login destination are associated with each other at the current site state when the operation site fails. By referring to this state file, if the current site state is specified, a login destination to be subsequently logged in can be specified. At this time, if the login destination is “error”, this indicates that login is not possible. In FIG. 3, the normal operation is an operation state in which all operations can be performed. The update regulation is an operation state in which an update-type job cannot be executed and a monitoring-type job can be executed. The connection restriction is an operation state in which login is not possible. The login restriction is a state in which login is impossible, but only a specific user can perform all operations. The specific user is a user who confirms normality when the failure is recovered.

  Next, the system management server 64 confirms the normality of the database server 63 (step S2). At this time, the system management server 64 confirms the normality of the database server 63 via the Web server 61 and the application server 62. Thereby, the normality of the Web server 61 and the application server 62 is also confirmed at the same time. Subsequently, the system management server 64 confirms the state of the target site (operation site) (step S3). If the result of this confirmation is normal, the system management server 64 returns to step S1 and periodically performs confirmation processing.

  On the other hand, if the target site is abnormal, the system management server 64 refers to the status file 65 and changes the status of the switching destination site (step S4). If there is an abnormality in this state change process, the system management server 64 repeats the retry of the state change process a predetermined number of times (step S5). If the abnormal state continues despite the retry of the state change process, the process ends abnormally (step S6).

  Next, when the state change process is successful, the system management server 64 changes the site state during which the terminals 1 to 4 are logged in (step S7). If there is an abnormality in this state change process, the system management server 64 repeats the retry of the state change process a predetermined number of times (step S8). At this time, in order to prioritize continuity of operation, automatic switching is executed even if the status change of the logged-in site fails. Then, the system management server 64 instructs the Web server 61 to automatically switch sites (step S9). In response to this, the Web server 61 instructs the terminals 1 to 4 to automatically switch the site (step S10). This command includes information necessary for automatic switching consisting of identification information of a site (operation site or backup site) to be logged in, an IP address of the operation site or backup site, and a user name and password to be logged in. . At this time, the Web server 61 needs to operate only the function of receiving an instruction from the system management server 64 and outputting the instruction to the terminals 1 to 4. If the Web server 61 cannot exchange commands, the process ends abnormally.

  The terminal 1 that has received a command for automatic site switching from the Web server 61 confirms the normality of the opposing system (the device management system 7 at the standby site if the current state is the device management system 6 at the operation site) (step S11). ). Here, the terminal 1 can execute an operation (for example, a select statement) to the database server 73 via the Web server 71 and can log in by referring to the state file 75. Check normality based on this. If the result of this confirmation is abnormal, normality confirmation is retried (step S12). At this time, the number of retries is a predetermined number. As a result of this retry, if normality cannot be confirmed (abnormal), the process ends abnormally (step S13).

  On the other hand, when the normality of the opposing system is confirmed, the terminal 1 refers to the information necessary for automatic switching and logs in to the opposing system (here, the device management system 7 at the spare site) (step S14). The business is continued (step S15).

  As described above, when logging in to the device management system from a terminal, the system management server periodically monitors the servers that make up the device management system at the operating site, and the server has an abnormality such as a failure. When this occurs, after the login to the switching destination site is enabled, a switching command is issued from the Web server to the logged-in terminal. Upon receiving this command, the terminal performs automatic switching based on information necessary for automatic switching included in this command. This eliminates the need for an apparatus for switching a login destination such as a load balancer as in the prior art, and can reduce the introduction cost, the maintenance cost, and the like. In addition, it is possible to arbitrarily switch sites, and even when a server stop is necessary for patch release or the like, it is always possible to seamlessly switch to a normal site and continue operations.

  1 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed, thereby executing site automatic processing. Switching processing may be performed. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included.

  The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.

  When a failure occurs in the connection destination system, it can be applied to an application in which it is essential to automatically switch the connection destination on the terminal side.

  1, 2, 3, 4 ... terminal, 5 ... network, 6 ... device management system (operation site), 7 ... device management system (preliminary site), 65, 75 ... status file

Claims (5)

A terminal connected to the system of the predetermined operation site;
Web server, application server, database server process down and OS (Operating System) down, network server connecting each of the web server, application server, database server, database server search engine failure Failure detection means to detect;
According to the current site status of the operation site and the standby site, a status file in which information on login destinations to be logged in when the operation site fails is related and stored;
When a failure is detected by the failure detection unit, the current site state of the operation site and the backup site is identified, and the login destination associated with the current site state is referred to by referring to the state file Switching command transmission for transmitting to the terminal connected to the operation site an automatic switching command including information necessary for switching the system to be connected to the spare site that is the login destination Means and
When the terminal receives the automatic switching command, the terminal switches the system to be connected with reference to information necessary for switching the system to be connected included in the received automatic switching command. Operation site switching system. When connecting to a system at a predetermined operation site and receiving an automatic switching command, the system to be connected is referred to by referring to information necessary for switching the system to be connected included in the received automatic switching command. An operation site switching device that transmits the automatic switching command to a switching terminal,
Web server, application server, database server process down and OS (Operating System) down, network server connecting each of the web server, application server, database server, database server search engine failure Failure detection means to detect;
According to the current site status of the operation site and the standby site, a status file in which information on login destinations to be logged in when the operation site fails is related and stored;
When a failure is detected by the failure detection unit, the current site state of the operation site and the backup site is identified, and the login destination associated with the current site state is referred to by referring to the state file Switching command transmission for transmitting to the terminal connected to the operation site an automatic switching command including information necessary for switching the system to be connected to the spare site that is the login destination An operation site switching device comprising: means. Information related to login destinations to be logged in at the time of failure of the operation site is stored in association with a terminal connected to a system at a predetermined operation site, failure detection means, and current site states of the operation site and the standby site. An operation site switching method performed by an operation site switching system comprising a state file and a switching command transmission means,
The failure detection means includes a process failure and an OS (Operating System) failure of a Web server, an application server, and a database server that constitute the operation site , a failure of a network connecting the Web server, the application server, and the database server, and a database server A failure detection step for detecting a failure of the search engine of
When the switching command transmission means detects a failure in the failure detection step, it identifies the current site state between the operation site and the backup site, refers to the state file, and enters the current site state. The terminal that is connected to the operation site is provided with an automatic switching command that includes information necessary to switch the system to be connected to the backup site that is the login destination, and obtains information about the login destination that is associated A switching command transmission step to transmit to
A switching step of switching the system to be connected with reference to information necessary for switching the system to be connected included in the received automatic switching command when the terminal receives the automatic switching command; An operation site switching method characterized by comprising: It is equipped with a status file that stores information related to login destinations that should be logged in when the primary site fails, according to the current site status of the primary site and backup site. When the switching command is received, the automatic switching command is transmitted to the terminal that switches the system to be connected with reference to information necessary for switching the system to be connected included in the received automatic switching command. An operation site switching method performed by the operation site switching device to transmit,
Web server, application server, database server process down and OS (Operating System) down, network server connecting each of the web server, application server, database server, database server search engine failure A failure detection step to detect;
When a failure is detected by the failure detection step, the current site state of the operation site and the backup site is identified, and the login destination associated with the current site state is referenced with reference to the state file Switching command transmission for transmitting to the terminal connected to the operation site an automatic switching command including information necessary for switching the system to be connected to the spare site that is the login destination An operation site switching method comprising the steps of: It is equipped with a status file that stores information related to login destinations that should be logged in when the primary site fails, according to the current site status of the primary site and backup site. When the switching command is received, the automatic switching command is transmitted to the terminal that switches the system to be connected with reference to information necessary for switching the system to be connected included in the received automatic switching command. To the computer on the operation site switching device to send,
Web server, application server, database server process down and OS (Operating System) down, network server connecting each of the web server, application server, database server, database server search engine failure A failure detection step to detect;
When a failure is detected by the failure detection step, the current site state of the operation site and the backup site is identified, and the login destination associated with the current site state is referenced with reference to the state file Switching command transmission for transmitting to the terminal connected to the operation site an automatic switching command including information necessary for switching the system to be connected to the spare site that is the login destination An operation site switching program characterized by causing steps to be performed.

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