JP2005078123A - Failure detection system and method and its program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a failure detection device equipped with functions to detect the failure of a process without performing a ps command or the like several times, and to detect the failure of the process in a real time. <P>SOLUTION: A process ID acquiring means 101 acquires a process list by performing a ps command, and acquires process ID corresponding to a process name mentioned in a monitor target process name description file 15 from the process list. Then, a file describer reading means 102 reads a file descriptor from a process information storage file 13 based on the acquired process ID, and a file descriptor registeration means 103 registers the file descriptor in a file descriptor status detection program 14. Also, a failure detection means 104 detects the failure of a monitor target process by accepting the notification of the invalidation of the file descriptor from the file descriptor status detection program 14. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a computer system, and more particularly to a failure detection apparatus, failure detection method, and program thereof.
[0002]
[Prior art]
Conventionally, when acquiring information related to a process of a program running in a UNIX (registered trademark) system, the information may be acquired using a ps (Report Process Status) command provided in the UNIX (registered trademark) OS. is there. And the technique which acquires the process information of the program currently started in the UNIX (trademark) system using this ps command is disclosed (for example, refer patent document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-342107
[Problems to be solved by the invention]
However, in the case of the method of acquiring process information by the above-described technique, it is necessary to execute the ps command in a short cycle in order to detect a process failure in real time. Here, in the method of detecting a process failure by obtaining process information using the ps command, only the state of the process at the time when the ps command is executed can be detected, so the failure cannot be detected in real time. In addition, the method of acquiring process information by executing the ps command many times in a short cycle places a load on the UNIX (registered trademark) system, and thus is not suitable as a means for causing a process failure.
Therefore, the present invention can detect a process failure without repeatedly executing a ps command or the like, and has a function capable of detecting a process failure in real time. It is another object of the present invention to provide a failure detection method and a program therefor.
[0005]
[Means for Solving the Problems]
The present invention has been made to solve the above-described problems. A process information storage file in which a file descriptor corresponding to a monitored process is recorded, and the invalidation of the file descriptor is determined based on the failure of the monitored process. A failure detection apparatus for a computer having a file descriptor state detection means for notifying, wherein a monitoring target process name description file in which a process name of the monitoring target process is described, a process ID acquisition command, and a process name and process are executed. A process ID acquisition unit that acquires a process list that is described in association with an ID, acquires a process ID corresponding to a process name described in the monitored process name description file from the process list, and the acquired process The file descriptor from the process information storage file based on the ID A file descriptor reading unit for reading, a file descriptor registration unit for registering the read file descriptor in the file descriptor state detection unit, and a notification of invalidity of the registered file descriptor in the file descriptor state detection And a failure detection unit that receives from the unit and detects a failure of the process to be monitored.
[0006]
According to the above configuration, in the present invention, the process ID acquisition unit executes the process ID acquisition command to acquire the process list in which the process name and the process ID are associated with each other, and the monitoring target process name from the process list The process ID corresponding to the process name described in the description file is acquired. The file descriptor reading / reading unit reads the file descriptor from the process information storage file based on the acquired process ID, and the file descriptor registration unit registers the read file descriptor in the file descriptor state detection unit. Further, the failure detection unit receives a notification of invalidity of the registered file descriptor from the file descriptor state detection unit, and detects a failure of the monitored process. As a result, it is possible to detect a process failure without repeatedly executing the ps command or the like. In addition, since the file descriptor status detection means notifies the invalidity of the file descriptor when the monitored process fails, it is possible to detect a process failure in real time.
[0007]
According to the present invention, in the above-described failure detection apparatus, a startup command name description file that describes a startup command name of the monitored process, and a startup command name description of the startup command name of the monitored process that has received the invalid notification Reboot means for reading from a file and executing a start command based on the read start command name is provided. Thus, if the start command name is described in the start command name description file, the failed monitored process can be restarted immediately.
[0008]
According to the present invention, in the above-described failure detection apparatus, the monitoring target process name description file describes a plurality of the same process names, and the process ID acquisition means has the same process name based on the plurality of the same process names. Each process ID of a plurality of monitoring target processes is acquired. As a result, even when multiple monitored processes with the same process name are started, different process IDs of the monitored processes with the same process name are read, so that a failure of each monitored process with the same process name is detected. I can do it.
[0009]
According to the present invention, in the above-described failure detection apparatus, the monitoring target process name description file describes an argument used for starting the monitoring target process in association with the process name, and the process ID acquisition unit includes the monitoring target process. The process ID is obtained from the process list based on the process name and the argument. Thereby, even when there are a plurality of monitoring target processes with the same process name activated with the same argument, it is possible to detect a failure of each monitoring target process with the same process name.
[0010]
The present invention also includes a process information storage file in which a file descriptor corresponding to a monitored process is recorded, and a file descriptor state detecting unit that notifies invalidity of the file descriptor based on a failure of the monitored process. A failure detection method for a computer, which executes a process ID acquisition command to acquire a process list in which process names and process IDs are described in association with each other, and is described in the monitored process name description file from the process list A process ID acquisition process for acquiring a process ID corresponding to the process name, a file descriptor read process for reading the file descriptor from the process information storage file based on the acquired process ID, and the read file descriptor Is registered in the file descriptor state detecting means. A failure detection process comprising: a file descriptor registration process; and a failure detection process for receiving a notification of invalidity of the registered file descriptor from the file descriptor state detection means and detecting a failure of the monitored process Is the method.
[0011]
Further, the present invention is the above-described failure detection method, comprising a startup command name description file describing a startup command name of the monitored process, wherein the startup command name of the monitored process that has received the invalid notification is It has a restarting process of reading from the startup command name description file and executing the startup command based on the read startup command name.
[0012]
Further, the present invention is the above-described failure detection method, wherein the monitoring target process name description file describes a plurality of the same process names, and in the process ID acquisition process, the process name is based on the plurality of the same process names. The process IDs of a plurality of monitoring target processes having the same value are acquired.
[0013]
The present invention is the above-described failure detection method, wherein the monitoring target process name description file describes an argument used for starting the monitoring target process in association with the process name, and in the process ID acquisition process, The process ID is acquired from the process list based on a process name of the process to be monitored and the argument.
[0014]
The present invention also includes a process information storage file in which a file descriptor corresponding to a monitored process is recorded, and a file descriptor state detecting unit that notifies invalidity of the file descriptor based on a failure of the monitored process. A program to be executed by a computer, which executes a process ID acquisition command to acquire a process list in which process names and process IDs are described in association with each other, and is described in the monitored process name description file from the process list A process ID acquisition process for acquiring a process ID corresponding to the process name, a file descriptor read process for reading the file descriptor from the process information storage file based on the acquired process ID, and the read file descriptor Is registered in the file descriptor state detection means. And a failure detection step for receiving a notification of invalidity of the registered file descriptor from the file descriptor state detection means and detecting a failure of the monitored process. .
[0015]
Further, the present invention reads the startup command name of the monitored process that has received the notification of invalidity from the startup command name description file describing the startup command name of the monitored process, and reads the startup A restarting process for executing a start command based on a command name is executed.
[0016]
Further, according to the present invention, in the process ID acquisition process of the above program, each process ID of a plurality of monitoring target processes having the same process name based on the same process name described in the monitoring target process name description file. It is characterized in that a process for acquiring the above is executed.
[0017]
According to the present invention, in the process ID acquisition process of the program described above, based on the process name of the monitoring target process described in the monitoring target process name description file and an argument used to start the monitoring target process, A process for obtaining the process ID from a process list is executed.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a computer having a failure detection function (failure detection device) according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic block diagram showing a software configuration of a computer having a failure detection function according to an embodiment of the present invention.
In this figure, reference numeral 1 denotes a failure detection function for detecting a failure in a monitored process. The computer having the failure detection function 1 in the present embodiment employs UNIX (registered trademark) as an OS (Operating System). In the failure detection function 1, reference numeral 11 denotes a monitoring process for detecting a failure of the monitoring target process (monitoring target application process). Reference numeral 12 denotes a process to be monitored (a process to be monitored) among the processes of the program started on the computer.
[0019]
Reference numeral 13 denotes a process information storage file for storing process information such as the process ID, CPU usage time, and file descriptor of the monitoring target process 12. The process information storage file 13 includes information such as a process ID and CPU usage time that can be acquired by executing a ps command (process ID acquisition command), a file descriptor that cannot be acquired by executing the ps command, and the like. Information is stored. Reference numeral 14 denotes a file descriptor state detection program (file descriptor state detection means) for notifying the monitoring process 11 of invalidity of the file descriptor based on the failure of the monitoring target process 12 corresponding to the registered file descriptor. is there.
[0020]
A file descriptor is also called a file descriptor, and is an integer value used when a program accesses a file or device. A file descriptor is assigned to each process, and the computer passes data to each process using the file descriptor. The file descriptor state detection program 14 is, for example, a poll function provided as a command of a UNIX (registered trademark) system call, and the process information storage file 13 in which the registered file descriptor is stored. This is a program that, when deleted, determines whether a file descriptor is invalid and notifies the monitoring process 11 of the invalidity. Reference numeral 15 denotes a monitoring target process description file (starting command name description) that describes the process name of the monitoring target process 12 determined in advance by the computer user and the starting path (starting command name) for restarting the monitoring target process 12. File).
[0021]
In the monitoring process 11, reference numeral 101 denotes a process ID acquisition unit that acquires the process ID of the monitoring target process 12 stored in the process information storage file 13 using the ps command. Reference numeral 102 denotes file descriptor reading means for reading a file descriptor from the process information storage file 13 based on the process ID of the monitoring target process 12. Reference numeral 103 denotes file descriptor registration means for registering the file descriptor read by the file descriptor reading means 102 from the process information storage file 13 in the file descriptor state detection program 14. Here, registering a file descriptor in the file descriptor state detection program 14 means notifying the file descriptor state detection program 14 of the file descriptor and setting so as to detect the state of the file descriptor. say. Reference numeral 104 denotes failure detection means for receiving a notification of invalidity of the file descriptor from the file descriptor state detection program 14 and detecting a failure of the monitored process 12. Reference numeral 105 denotes process forced termination means for forcibly terminating the failed monitored process 12. Reference numeral 106 denotes restarting means for restarting the monitored process 12 forcibly terminated by the process forcibly terminating means 105.
[0022]
When a process is activated in the computer, a process information storage file 13 is created for each activated process, for example, under the / proc directory. Then, the monitoring process 11 acquires a file descriptor corresponding to the monitoring target process 12 among processes activated on the computer by processing to be described later based on the process ID, and uses the acquired file descriptor as a file description. Register in the child state detection program 14. Then, the file descriptor state detection program 14 detects the invalidity of the received file descriptor and notifies the monitoring process 11 of it. As a result, the monitoring process 11 detects a failure of the monitoring target process 12.
[0023]
FIG. 2 is a diagram showing an image of processing in which the monitoring process 11 acquires a file descriptor. As shown in this figure, the monitoring process 11 has a file description from each process information storage file 13 of the monitoring target process 12 created in the / proc directory when the computer employs, for example, UNIX (registered trademark) as the OS. Read the child. FIG. 3 is a diagram showing an image of processing when the monitoring process 11 detects a failure of the monitoring target process 12. As shown in this figure, for example, when the process information storage file (c) is deleted and the file descriptor (c) becomes invalid, the invalidation is notified to the monitoring process 11. As a result, the monitoring process 11 detects a failure of the monitoring target process corresponding to the file descriptor (c).
[0024]
Next, the process of the failure detection function will be described step by step with reference to FIG. FIG. 4 is a diagram showing a processing flow of the failure detection function.
First, the process ID acquisition unit 101 of the monitoring process 11 reads the monitoring target process name from the monitoring target process description file 15, and if the activation path corresponding to the process name is described, reads the activation path, A ps command is executed (step S1) to obtain a list of processes running on the computer. In the process list, a process name and an argument at the time of starting the process (only the process name when no argument is specified when starting the process) and a process ID are displayed in association with each other. Then, the process ID acquisition unit 101 acquires, from the process list, a process ID associated with the same process name as the monitoring target process name read from the monitoring target process description file 15 (step S2).
[0025]
When the monitoring target process name and the argument are described in the monitoring target process description file 15 in association with each other, the process ID acquisition unit 101 uses the process ID associated with the monitoring target process name and the argument. From the list. When a plurality of the same monitoring target process names are described in the monitoring target process description file 15, the process ID acquisition unit 101 lists the process IDs of the same monitoring target process 12 as many as described from the list. read. Here, in this embodiment, the number of the same monitoring target processes 12 described in the monitoring target process description file 15 is the same as the number of the monitoring target processes 12 activated on the computer. It is assumed.
[0026]
Next, the file descriptor reading unit 102 reads one process information storage file 13 of each process recorded under the / proc directory, and determines whether or not a process ID is stored. Then, the file descriptor reading unit 102 reads the file descriptor from the process information storage file 13 that stores the process ID read by the process ID acquisition unit 101 (step S3). The monitoring process 11 stores the monitoring target process name read from the monitoring target process description file 15, the process ID of the monitoring target process, and the file descriptor based on the process ID in a storage unit such as a memory in association with each other. Keep it.
[0027]
Next, the file descriptor registration unit 103 registers the file descriptor read by the file descriptor reading unit 102 in the file descriptor state detection program 14 (step S4). Here, the processing from step 2 to step 4 is repeated for the monitoring target process name described in the monitoring target process description file 15. Then, the file descriptor state detection program 14 constantly monitors whether or not the registered file descriptor is invalid (step S5). Then, the file descriptor state detection program 14 waits for notification of deletion of the file descriptor from the OS.
[0028]
Next, when a failure occurs in the monitoring target process 12, the corresponding process information storage file 13 is deleted by the OS. Then, the file descriptor state detection program 14 determines that the file descriptor recorded in the erased process information storage file 13 is invalid, and notifies the monitoring process 11 of the invalidity of the file descriptor (step S6). . Then, the failure detection unit 104 of the monitoring process 11 detects that the process having the monitoring target process name associated with the invalid file descriptor and recorded in the storage unit has failed (step S7).
[0029]
Next, when the failure detection unit 104 of the monitoring process 11 detects a failure of the monitoring target process 12, the process forced termination unit 105 uses the process ID recorded in the storage unit in association with the monitoring target process name. The monitored process 12 is forcibly terminated. Note that the process forcible termination unit 105 forcibly terminates the monitoring target process 12 using a Kill command provided in the UNIX (registered trademark) system, for example (step S8). Then, the restarting means 106 confirms whether or not the process ID acquisition means 101 has read the startup path in step S1 (step S9). If the startup path of the monitoring target process 12 that has been forcibly terminated is read, the restarting unit 106 restarts the monitoring target process 12 that has been forcibly terminated using the startup path (step S10).
[0030]
The failure detection method of the monitoring target process 12 has been described above. However, when the file descriptor reading unit 102 acquires a plurality of process IDs related to the monitoring target process 12 having the same name, the largest value (the youngest) is obtained. The file descriptor described in the process information storage file 13 in which the process ID is stored may be read, or each file descriptor is read from the process information storage file 13 in which each process ID is described. In this way, all these file descriptors may be registered in the file descriptor state detection program 14.
[0031]
The process described above is stored in a computer-readable recording medium in the form of a program, and the above process is performed by the computer reading and executing this program. Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.
The above-mentioned process is an execution unit under the management of the OS of the program. In the processing of the computer, the main memory reads and stores a program recorded on a recording medium such as a hard disk, and the CPU executes the program stored in the main memory. Further, the CPU reads the data for the executed program from the main memory and writes the data for the executed program into the main memory. A plurality of processes, which are processing execution units for each computer program, are processed in parallel under the management of the OS.
[0032]
【The invention's effect】
As described above, according to the present invention, the process ID acquisition unit executes the process ID acquisition command to acquire the process list in which the process name and the process ID are associated with each other, and the monitoring target process is acquired from the process list. The process ID corresponding to the process name described in the name description file is acquired. The file descriptor reading / reading unit reads the file descriptor from the process information storage file based on the acquired process ID, and the file descriptor registration unit registers the read file descriptor in the file descriptor state detection unit. Further, the failure detection unit receives a notification of invalidity of the registered file descriptor from the file descriptor state detection unit, and detects a failure of the monitored process.
As a result, it is possible to detect a process failure without repeatedly executing the ps command or the like. In addition, since the file descriptor status detection means notifies the invalidity of the file descriptor when the monitored process fails, it is possible to detect a process failure in real time.
[0033]
Further, according to the present invention, the startup command name description file describing the startup command name of the monitoring target process and the startup command name of the monitoring target process that has received the invalid notification are read from the startup command name description file and read. And restarting means for executing a start command based on the start command name.
Thus, if the start command name is described in the start command name description file, the failed monitored process can be restarted immediately.
[0034]
Further, according to the present invention, the monitoring target process name description file describes a plurality of the same process name, and the process ID acquisition unit is configured to process each of the monitoring target processes having the same process name based on the plurality of the same process names. The process ID is acquired. As a result, even when multiple monitored processes with the same process name are started, different process IDs of the monitored processes with the same process name are read, so that a failure of each monitored process with the same process name is detected. I can do it.
[0035]
Further, according to the present invention, the monitoring target process name description file describes the argument used to start the monitoring target process in association with the process name, and the process ID acquisition means is based on the process name and the argument of the monitoring target process. The process ID is obtained from the process list. Thereby, even when there are a plurality of monitoring target processes with the same process name activated with the same argument, it is possible to detect a failure of each monitoring target process with the same process name.
[Brief description of the drawings]
FIG. 1 is a schematic block diagram showing a software configuration of a computer having a failure detection function according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating an image of processing in which a monitoring process according to the present embodiment acquires a file descriptor.
FIG. 3 is a diagram showing an image of processing when a monitoring process according to the present embodiment detects a failure of a process to be monitored.
FIG. 4 is a diagram illustrating a processing flow of a failure detection function according to the present embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Failure detection function 11 Monitoring process 12 Monitoring object process 13 Process information storage file 14 File descriptor state detection program 15 Monitoring object process description file 101 Process ID acquisition means 102 File descriptor reading means 103 File descriptor registration means 104 Failure detection means 105 process forced termination means 106 restart means

Claims (12)

A failure detection apparatus for a computer, comprising: a process information storage file in which a file descriptor corresponding to a monitored process is recorded; and a file descriptor state detection unit that notifies invalidity of the file descriptor based on a failure of the monitored process Because
A monitored process name description file describing the process name of the monitored process;
A process ID acquisition command is executed to acquire a process list in which process names and process IDs are described in association with each other, and a process ID corresponding to the process name described in the monitored process name description file is obtained from the process list. Process ID acquisition means for acquiring;
File descriptor reading means for reading the file descriptor from the process information storage file based on the acquired process ID;
File descriptor registration means for registering the read file descriptor in the file descriptor state detection means;
A failure detection unit that receives a notification of invalidity of the registered file descriptor from the file descriptor state detection unit and detects a failure of the monitored process; and
A failure detection apparatus comprising: A startup command name description file describing the startup command name of the monitored process;
A restart unit that reads the startup command name of the monitored process that has received the notification of invalidity from the startup command name description file, and executes the startup command based on the read startup command name;
The failure detection apparatus according to claim 1, comprising: The monitoring target process name description file describes a plurality of the same process name,
The process ID acquisition unit acquires each process ID of a plurality of monitoring target processes having the same process name based on the plurality of the same process names. The failure detection device described. The monitoring target process name description file describes an argument used to start the monitoring target process in association with the process name,
The failure according to any one of claims 1 to 3, wherein the process ID acquisition unit acquires the process ID from the process list based on a process name of the monitoring target process and the argument. Detection device. A failure detection method for a computer, comprising: a process information storage file in which a file descriptor corresponding to a monitored process is recorded; and a file descriptor state detection unit that notifies invalidity of the file descriptor based on a failure of the monitored process Because
Execute the process ID acquisition command to acquire a process list in which the process name and process ID are described in association with each other, and acquire the process ID corresponding to the process name described in the monitored process name description file from the process list Process ID acquisition process,
A file descriptor reading process for reading the file descriptor from the process information storage file based on the acquired process ID;
A file descriptor registration process for registering the read file descriptor in the file descriptor state detection means;
A failure detection step of receiving a notification of invalidity of the registered file descriptor from the file descriptor state detection means and detecting a failure of the monitored process;
A failure detection method comprising: A start command name description file describing a start command name of the monitored process;
The restart process of reading the start command name of the monitored process that has received the invalid notification from the start command name description file and executing the start command based on the read start command name Item 6. The fault detection method according to Item 5. The monitoring target process name description file describes a plurality of the same process name,
7. The process ID acquisition process according to claim 5, wherein each process ID of a plurality of monitoring target processes having the same process name is acquired based on the plurality of the same process names. Failure detection method described in 1. The monitoring target process name description file describes an argument used to start the monitoring target process in association with the process name,
8. The process ID acquisition process according to claim 5, wherein the process ID is acquired from the process list based on a process name of the process to be monitored and the argument in the process ID acquisition process. 9. Fault detection method. A program for causing a computer to execute a process information storage file in which a file descriptor corresponding to a monitored process is recorded, and a file descriptor state detecting unit that notifies invalidity of the file descriptor based on a failure of the monitored process Because
Execute the process ID acquisition command to acquire a process list in which the process name and process ID are described in association with each other, and acquire the process ID corresponding to the process name described in the monitored process name description file from the process list Process ID acquisition process,
A file descriptor reading process for reading the file descriptor from the process information storage file based on the acquired process ID;
A file descriptor registration process for registering the read file descriptor in the file descriptor state detection means;
A failure detection step of receiving a notification of invalidity of the registered file descriptor from the file descriptor state detection means and detecting a failure of the monitored process;
A program that executes the process. The startup command name of the monitored process that has received the invalid notification is read from the startup command name description file that describes the startup command name of the monitored process, and the startup command is executed based on the read startup command name The program according to claim 9, which causes a restart process to be executed. The process of acquiring each process ID of a plurality of monitoring target processes having the same process name based on the same process name described in the monitoring target process name description file in the process ID acquisition process. The program according to claim 9 or claim 10. In the process ID acquisition process, the process ID is acquired from the process list based on the process name of the monitoring target process described in the monitoring target process name description file and an argument used for starting the monitoring target process. The program according to any one of claims 9 to 11, wherein the program is executed.

Images