JP2021012498A - Distributed container monitoring system and distributed container monitoring method - Google Patents

Abstract

To provide a distributed container monitoring system capable of appropriately monitoring failures even if a device that has an agent that monitors server resources is failed.SOLUTION: In a monitoring container 12 that monitors business containers in a distributed container monitoring system, a first signal transmission unit 122 transmits a signal indicating status confirmation to the business container, which is a container to be monitored, and a first detection unit 123 detects a failure of the business container based on the response status of the business container to the signal transmitted by the first signal transmission unit 122. The monitoring container 12 for monitoring the monitoring container 12 that monitors the business containers, a second signal transmission unit 124 transmits the signal indicating the status confirmation to the monitoring container, and a second detection unit 125 detects the failure of the monitoring container based on the response status of the monitoring container to the signal transmitted by the second signal transmission unit 124.SELECTED DRAWING: Figure 2

Description

The present invention relates to a distributed container monitoring system and a distributed container monitoring method.

Conventionally, in a container environment, each server resource holds the management status as a blockchain, so that when a server resource fails without using the central management system, the container that was operating on the server resource. Some of them restore the container environment by determining the relocation destination of the server and relocating the server (see, for example, Patent Document 1).

JP-A-2018-156465

In the technique described in Patent Document 1, the agent monitors the server resource to determine whether or not the server resource has a failure, but the device having the agent has a failure. In that case, it may not be possible to properly monitor the failure.

Therefore, an object of the present invention is to monitor failures more appropriately.

The above and other objects and novel features of the present invention will become apparent from the description and accompanying drawings herein.

A brief description of typical inventions disclosed in the present application is as follows.

In the distributed container monitoring system that monitors the operating status of the monitored container according to a typical embodiment of the present invention, the first monitoring container that monitors the monitored container and the first monitoring container that monitors the first monitoring container are monitored. The first monitoring container includes two monitoring containers, the first monitoring container monitors the signal transmitted by the first signal transmission unit and the first signal transmission unit that transmits a signal indicating status confirmation to the container to be monitored. It has a first detection unit that detects a failure of the monitored container based on the response status of the target container, and the second monitoring container sends a signal indicating status confirmation to the first monitoring container. It has a second signal transmitting unit for transmitting, and a second detecting unit for detecting a failure of the first monitoring container based on the response status of the first monitoring container to the signal transmitted by the second signal transmitting unit. ..

Among the inventions disclosed in the present application, the effects obtained by representative ones will be briefly described as follows.

That is, according to a typical embodiment of the present invention, fault monitoring can be performed more appropriately.

It is a figure which showed the outline about the structure of the distributed container monitoring system which is this embodiment. It is a functional block diagram of the monitoring container which is this embodiment. It is a sequence diagram which shows the flow of processing when the business container and the monitoring container are monitored by the monitoring container in this embodiment, and a failure is detected in the business container. It is a sequence diagram which shows the flow of processing when the business container and the monitoring container are monitored by the monitoring container in this embodiment, and a failure is detected in the monitoring container. It is an example of the figure explaining the screen example of the monitoring situation.

Hereinafter, the present embodiment will be described in detail with reference to the drawings. In addition, in all the drawings for explaining the embodiment, in principle, the same reference numerals are given to the same parts, and the repeated description thereof will be omitted. On the other hand, the parts described with reference numerals in one figure may be referred to with the same reference numerals in the explanation of other figures, although they are not shown again.

<Overview>
FIG. 1 is a diagram showing an outline of the configuration of the distributed container monitoring system 1 according to the present embodiment. As shown in FIG. 1, the distributed container monitoring system 1 has a server 10 (servers 10a to 10c) and a control server 20.

The distributed container monitoring system 1 is a system that monitors the operating status of a container to be monitored (a container that executes a business application, etc.). Here, the container is realized by virtualization technology.

The servers 10a to 10c and the control server 20 are so-called server devices, and can send and receive information and signals to and from each other via the network 30.

The server 10 and the control server 20 are an OS (Operating System), a DBMS (DataBase Management System), or a Web server program developed on a memory from a recording device such as an HDD (Hard Disk Drive) by a CPU (Central Processing Unit) (not shown). Run middleware such as, and software running on it. As a result, various functions described later are realized.

The control server 20 manages the container and instructs the server 10 to create the container. The control server 20 acquires information on the operating status of the container being executed on the server 10 from the server 10, and outputs and processes the acquired information.

The control server 20 realizes various functions by executing existing distributed container operation management software such as Kubernetes.

The server 10 creates a container based on the instruction from the control server 20. Based on the instruction from the control server 20, the server 10 includes a business container 11 (container to be monitored) which is a container for executing a business application and a monitoring container 12 which is a container capable of monitoring the business container. Generate.

Further, the monitoring container 12 in the server 10 monitors the business container 11. Further, the monitoring container 12 other than the monitoring container 12 that monitors the business container 11 monitors the monitoring container 12 that monitors the business container 11.

In the distributed container monitoring system 1 shown in FIG. 1, the server 10a (identifier is server S1) has a monitoring container 12a (identifier is monitoring container M1). Further, the server 10b (identifier is server S2) has a business container 11 and a monitoring container 12b (identifier is monitoring container M2). Further, the server 10c (identifier is server S3) has a monitoring container 12c (identifier is monitoring container M3).

As described above, in the distributed container monitoring system 1, the monitoring containers 12 are distributed and arranged in each server resource (server 10a to server 10c).

Subsequently, the function of the monitoring container 12 will be described with reference to FIG. FIG. 2 is a functional block diagram of the monitoring container 12.

As shown in FIG. 2, the monitoring container 12 includes a role determination unit 121, a first signal transmission unit 122, a first detection unit 123, a second signal transmission unit 124, a second detection unit 125, a detection result output unit 126, and It has a recovery unit 127.

In the role determination unit 121, each of the monitoring containers 12 functions as a monitoring container 12 (first monitoring container) that monitors the business container 11, or a container that monitors the monitoring container 12 that monitors the business container 11 (second). It is the part that determines whether it functions as a monitoring container).

When, for example, the role determination unit 121 receives an inquiry for a leader candidacy from the control server 20, it sends a signal indicating the leader candidacy to the control server 20 or another monitoring container 12. Here, the reader means a container that monitors the business container 11.

Further, the role determination unit 121 receives a signal indicating a leader candidacy from another monitoring container 12. The role determination unit 121 determines the monitoring container 12 that transmits the signal indicating the leader candidacy earliest as the monitoring container 12 that monitors the business container 11. Further, the other monitoring container 12 is determined to be the monitoring container 12 that monitors the business container 11.

Further, when the self-monitoring container 12 is a monitoring container 12 that monitors the business container 11, the role determination unit 121 periodically transmits a signal indicating that the leader continues to be announced to another monitoring container 12.

Further, when it is detected that a failure has occurred in the monitoring container 12 that monitors the business container 11, the role determination unit 121 transmits a signal indicating the leader candidacy to the control server 20 and other monitoring containers 12. .. In this way, the role determination unit 121 redetermines the role when a failure occurs in the monitoring container 12 which is the leader. In this way, the role determination unit 121 uses the monitoring container 12 other than the monitoring container 12 in which the failure has occurred as the leader, triggered by the failure of the monitoring container 12 which is the leader.

The first signal transmission unit 122 is a unit that transmits a signal indicating status confirmation to the business container 11 which is a container to be monitored.

When the role determination unit 121 determines that the own container functions as the monitoring container 12 that monitors the business container 11, the first signal transmission unit 122 confirms the existence of the business container 11 at a predetermined timing. A survival confirmation signal, which is a signal for inquiring about (health check signal), is transmitted.

When the first signal transmission unit 122 transmits the survival confirmation signal, the first signal transmission unit 122 notifies the first detection unit 123 that the signal has been transmitted.

The first detection unit 123 is a part that detects a failure of the business container 11 based on the response status of the business container 11 to the signal transmitted by the first signal transmission unit 122.

When the first detection unit 123 receives the notification that the survival confirmation signal has been transmitted by the first signal transmission unit 122, the first detection unit 123 receives the response signal for the survival confirmation signal from the business container 11.

The first detection unit 123 detects a failure of the business container 11 based on the content of the response signal or the reception state of the response signal.

For example, if the first detection unit 123 does not transmit the response signal within a predetermined period after the survival confirmation signal is transmitted from the first signal transmission unit 122, the business container 11 is based on this result. Detects a failure.

The first detection unit 123 may detect the failure of the business container 11 when the timing of receiving the response signal is gradually delayed. This is because there is a high probability of failure of the business container 11.

When the first detection unit 123 receives the response signal, the first detection unit 123 sends the response signal to the detection result output unit 126. Further, when the first detection unit 123 detects a failure of the business container 11, it sends out to the detection result output unit 126 that the failure has been detected.

The first detection unit 123 may send the response signal itself and information on the response signal (information on the time until the response signal is received) to the detection result output unit 126.

The second signal transmission unit 124 is a unit that transmits a signal indicating status confirmation to the monitoring container 12 that monitors the business container 11.

When the role determination unit 121 determines that the own container functions as the monitoring container 12 that monitors the monitoring container 12 that monitors the business container 11, the second signal transmission unit 124 is monitored at a predetermined timing. A survival confirmation signal is transmitted to the monitoring container 12.

When the second signal transmission unit 124 transmits the survival confirmation signal, the second signal transmission unit 124 notifies the second detection unit 125 of the transmission.

The second detection unit 125 is a part that detects a failure of the monitoring container 12 to be monitored based on the response status of the monitoring container 12 to be monitored to the signal transmitted by the second signal transmission unit 124.

When the second detection unit 125 receives the notification that the survival confirmation signal has been transmitted by the second signal transmission unit 124, the second detection unit 125 receives the response signal to the survival confirmation signal from the monitoring container 12 to be monitored. When the monitoring container 12 to be monitored receives the survival confirmation signal when it is operating normally, it transmits a response signal to the source of the survival confirmation signal.

The second detection unit 125 detects a failure of the monitoring container 12 to be monitored based on the content of the response signal or the reception state of the response signal.

For example, if the response signal is not transmitted within a predetermined period after the survival confirmation signal is transmitted from the second signal transmission unit 124, the second detection unit 125 is monitored based on this result. Detects a failure of the monitoring container 12.

The second detection unit 125 may detect the failure of the monitoring container 12 to be monitored when the timing of receiving the response signal is gradually delayed. This is because there is a high probability that the monitoring container 12 to be monitored will fail.

When the second detection unit 125 receives the response signal, the second detection unit 125 sends the response signal to the detection result output unit 126. When the second detection unit 125 detects a failure of the monitoring container 12 to be monitored, the second detection unit 125 sends a detection result output unit 126 to the effect that the failure has been detected. The second detection unit 125 may send the response signal itself and information on the response signal (information on the time until the response signal is received) to the detection result output unit 126.

The detection result output unit 126 is a unit that outputs the detection result by the first detection unit 123 or the second detection unit 125.

For example, the detection result output unit 126 transmits the detection result by the first detection unit 123 or the second detection unit 125 to the control server 20.

The detection result output unit 126 may acquire the response signal itself acquired from the first detection unit 123 or the second detection unit 125 and information on the response signal, and transmit the information to the control server 20. ..

The recovery unit 127 is a part that recovers the container environment when a failure of the business container 11 which is a container to be monitored is detected by the first detection unit 123.

When the recovery unit 127 receives a notification from the first detection unit 123 that a failure of the business container 11 has been detected, the recovery unit 127 makes a container creation request to the servers 10 other than the business container 11 in which the failure has occurred, and performs business. Request the creation of container 11. In this case, the request destination server 10 creates the business container 11 and operates the business container 11. In this way, when the failure of the business container 11 is detected, the recovery unit 127 restores the container environment.

<Processing procedure>
Subsequently, with reference to FIG. 3, the processing when the business container 11 and the monitoring container 12 are monitored by the monitoring container 12 in the present embodiment and a failure is detected in the business container 11 will be described.

FIG. 3 is a sequence diagram showing a processing flow when the business container 11 and the monitoring container 12 are monitored by the monitoring container 12 in the present embodiment and a failure is detected in the business container 11.

First, it is assumed that the business container 11 is running on the server 10b (step S1). Upon receiving the inquiry of the reader candidate from the control server 20, the role determination unit 121 transmits a signal indicating the leader candidacy to the other monitoring container 12. For example, the role determination unit 121 of the monitoring container 12a transmits a signal indicating a leader candidacy to the monitoring container 12b and the monitoring container 12c (steps S2 and S3).

The role determination unit 121 of the monitoring container 12a determines the self-monitoring container 12a as the monitoring container that monitors the business container 11 when the self-monitoring container 12a is transmitting the signal indicating the leader candidacy earliest. Further, the role determination unit 121 of the monitoring container 12a determines the monitoring container 12b and the monitoring container 12c as the monitoring container that monitors the monitoring container 12a.

The first signal transmission unit 122 of the monitoring container 12a transmits a signal indicating the existence confirmation of the business container 11, and when the first detection unit 123 receives the response signal from the business container 11, the business container 11 has failed. It is determined that there is no such thing (step S4).

Further, the role determining unit 121 of the monitoring container 12a transmits a signal indicating the leader continuation statement to the monitoring container 12b and the monitoring container 12c at predetermined intervals (steps S5 and S6).

Further, the second signal transmission unit 124 of the monitoring container 12b transmits a signal indicating survival confirmation to the monitoring container 12a, and the second detection unit 125 of the monitoring container 12b survives by receiving a response signal from the monitoring container 12a. Confirm (step S7).

Further, the second signal transmission unit 124 of the monitoring container 12c transmits a signal indicating survival confirmation to the monitoring container 12a, and the second detection unit 125 of the monitoring container 12c survives by receiving a response signal from the monitoring container 12a. Confirm (step S8).

Further, the first signal transmission unit 122 of the monitoring container 12a transmits a signal indicating the existence confirmation of the business container 11 (step S9). It should be noted that a failure has occurred in the server 10b between steps S4 and S9.

Further, the role determination unit 121 of the monitoring container 12a transmits a signal indicating the leader continuation statement to the monitoring container 12b and the monitoring container 12c at predetermined intervals (steps S10 and S11).

Further, the second signal transmission unit 124 of the monitoring container 12c transmits a signal indicating survival confirmation to the monitoring container 12a, and the second detection unit 125 of the monitoring container 12c survives by receiving a response signal from the monitoring container 12a. Confirmation (step S12).

The first detection unit 123 of the monitoring container 12a detects that a failure has occurred in the business container 11 because there is no response signal for a predetermined period after the signal indicating the survival confirmation transmitted in step S9 is transmitted. In response to this, the recovery unit 127 transmits a container recovery instruction signal to the server 10c (step S13), and the server 10c generates (recovers) a business container in response to this (step S14).

In step S15, the leader continues to be announced as in step S6, and in step S16, the leader survival confirmation process is performed in the same manner as in step S8.

Further, in step S17, the leader continuation is announced in the same manner as in step S6, and in step S18, the leader survival confirmation process is performed in the same manner as in step S8.

Further, in step S19, the first signal transmission unit 122 of the monitoring container 12a transmits a signal indicating the existence confirmation of the business container 11 to the business container 11 of the server 10c (step S19).

Subsequently, with reference to FIG. 4, the processing when the business container 11 and the monitoring container 12 by the monitoring container 12 in the present embodiment are monitored and a failure is detected in the monitoring container 12 will be described. FIG. 4 is a sequence diagram showing a processing flow when the business container 11 and the monitoring container 12 are monitored by the monitoring container 12 in the present embodiment and a failure is detected in the monitoring container 12.

Since steps S31 to S38 are the same as steps S1 to S8 in the sequence diagram shown in FIG. 3, description thereof will be omitted.

In step S39, similarly to step S34, the first signal transmission unit 122 of the monitoring container 12a transmits a signal indicating the existence confirmation of the business container 11, and the first detection unit 123 receives the response signal from the business container 11. If so, it is determined that the business container 11 has not failed (step S39).

In steps S40 to S43, the leader continuation statement and the leader survival confirmation process are performed in the same manner as in steps S35 to S38.

After step S43, a failure occurs in the server 10a. After that, the server 10b and the second signal transmission unit 124 of the server 10c transmit a signal indicating survival confirmation to the monitoring container 12a (step S44, step S45).

The second detection unit 125 of the server 10b and the server 10c indicates that a failure has occurred in the monitoring container 12a when the waiting period (step S46) elapses after the second signal transmission unit 124 transmits the signal indicating the survival confirmation. Detect.

In response to this, the role determination unit 121 of the monitoring container 12b transmits a signal indicating the leader candidacy to the monitoring container 12c, and determines the monitoring container 12b as the monitoring container that monitors the business container 11 (step S47).

The first signal transmission unit 122 of the monitoring container 12b transmits a signal indicating the existence confirmation of the business container 11, and when the first detection unit 123 receives the response signal from the business container 11, the business container 11 has failed. It is determined that there is no such thing (step S48).

Further, the role determination unit 121 of the monitoring container 12b transmits a signal indicating the leader continuation statement to the monitoring container 12c at predetermined intervals (step S49). Further, the second signal transmission unit 124 of the monitoring container 12c transmits a signal indicating survival confirmation to the monitoring container 12b, and the second detection unit 125 of the monitoring container 12c survives by receiving a response signal from the monitoring container 12b. Confirmation (step S50).

Further, the first signal transmission unit 122 of the monitoring container 12b transmits a signal indicating the existence confirmation of the business container 11, and when the first detection unit 123 receives the response signal from the business container 11, the business container 11 fails. It is determined that this has not been done (step S51).

Subsequently, an example of the monitoring status screen will be described with reference to FIG. FIG. 5 is a diagram illustrating a screen example of the monitoring status.

The screen of FIG. 5 is, for example, a screen generated by the control server 20 based on the information acquired from the detection result output unit 126.

In the example of FIG. 5, it is shown that three servers are managed. Specifically, the server whose node name is "Worker # 1" has a monitoring container whose identifier is the monitoring container M1. Further, the server whose node name is "Worker # 2" has a business container whose identifier is the business container C1 and a monitoring container whose identifier is the monitoring container M2. Further, the server whose node name is "Worker # 3" has a business container whose identifier is the business container C2 and a monitoring container whose identifier is the monitoring container M3.

In the example of FIG. 5, it is shown that the monitoring container M1 monitors the business container C1 and the business container C2, and the monitoring container M2 and the monitoring container M3 monitor the monitoring container M1.

Further, in the "HealthCheck Response Time", a graph of the response time to the signal indicating the existence confirmation of the business container C1 and the business container C2 is shown.

In addition, "Message Count" shows the transition of the number of messages for each message level (Info, Warn, Error).

Further, the detail column D1 indicates the business container to which the message was sent, the message transmission date, the message transmission time, the message level, the node to which the business container belongs, and the specific message content.

In the above-described embodiment, the case where the monitoring container 12 has the role determination unit 121 has been described, but the control server 20 may have the role determination unit 121.

In the above-described embodiment, the case where the role determining unit 121 dynamically determines the leader has been described, but the leader may be fixed in advance.

The case where the monitoring container 12 has the first signal transmission unit 122, the first detection unit 123, the second signal transmission unit 124, and the second detection unit 125 has been described, but the present invention is not limited to this, and whether or not the monitoring container 12 is a reader in advance. If it is decided, you do not have to have all of them.

<Effect>
In the monitoring container 12 (monitoring container 12a in the above embodiment) that monitors the business container in the above-mentioned distributed container monitoring system 1, the first signal transmission unit 122 with respect to the business container 11 that is the container to be monitored. A signal indicating status confirmation is transmitted, and the first detection unit 123 detects a failure of the business container 11 based on the response status of the business container 11 to the signal transmitted by the first signal transmission unit 122.

Further, in the monitoring container 12 (monitoring container 12c in the above-described embodiment) that monitors the monitoring container 12 that monitors the business container, the second signal transmission unit 124 transmits a signal indicating status confirmation to the monitoring container 12a. Then, the second detection unit 125 detects the failure of the monitoring container 12a based on the response status of the monitoring container 12a to the signal transmitted by the second signal transmission unit 124.

In this case, since the distributed container monitoring system 1 further monitors the monitoring container 12 that monitors the business container 11, even if a failure occurs in the monitoring container 12 that monitors the business container 11, the failure should be dealt with promptly. Can be done. That is, fault monitoring can be performed more appropriately. Further, in the distributed container monitoring system 1 of the above-described embodiment, it is possible to make maximum effective use of server resources and monitor failures with a simpler implementation without using a blockchain.

Further, the role determination unit 121 determines whether each of the monitoring containers 12 functions as a monitoring container 12 that monitors the business container 11 or a monitoring container 12 that monitors the monitoring container 12 that monitors the business container 11. To do.

As described above, in the distributed container monitoring system 1, the role determination unit 121 can dynamically divide the roles by dividing the roles of the plurality of monitoring containers 12.

Further, when the second detection unit 125 detects a failure of the monitoring container 12 that monitors the business container 11, the role determination unit 121 functions as another monitoring container 12 as a monitoring container 12 that monitors the business container 11. Let me.

In this way, the distributed container monitoring system 1 detects the failure of the monitoring container 12 that monitors the business container 11, and sets the other monitoring container 12 as the monitoring container 12 that monitors the business container 11 to continue. Then, the business container 11 can be continuously monitored appropriately.

Further, when the recovery unit 127 detects a failure of the business container 11 which is a container to be monitored by the first detection unit 123, the recovery unit 127 performs a restoration process of the container environment. As a result, in the distributed container monitoring system 1, the business container 11 can be appropriately recovered from the failure. Further, depending on the application that executes the business container 11, it is possible to recover by the function of the application itself, but according to the recovery unit 127, it is possible to recover from the failure without depending on it.

Although the invention made by the present inventor has been specifically described above based on the embodiments, the present invention is not limited to the above embodiments and can be variously modified without departing from the gist thereof. Needless to say. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. It is also possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. .. Further, it is possible to add / delete / replace other configurations with respect to a part of the configurations of each embodiment.

Further, each of the above configurations, functions, processing units, processing means and the like may be realized by hardware by designing a part or all of them by, for example, an integrated circuit. Further, each of the above configurations, functions, and the like may be realized by software by the processor interpreting and executing a program that realizes each function. Information such as programs, tables, and files that realize each function can be placed in a memory, a hard disk, a recording device such as an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or a DVD.

Further, in each of the above figures, the control lines and information lines are shown as necessary for explanation, and not all the control lines and information lines in the implementation are necessarily shown. In practice, it can be considered that almost all configurations are interconnected.

The present invention can be used in a distributed container monitoring system that monitors the operating status of a container to be monitored.

1 ... Distributed container monitoring system, 10 ... Server, 11 ... Business container, 12 ... Monitoring container, 121 ... Role determination unit, 122 ... First signal transmission unit, 123 ... First detection unit,
124 ... 2nd signal transmission unit, 125 ... 2nd detection unit, 126 ... detection result output unit, 127 ... recovery unit.

Claims (5)

A distributed container monitoring system that monitors the operating status of monitored containers.
The first monitoring container that monitors the monitored container and
A second monitoring container that monitors the first monitoring container is provided.
The first monitoring container is
A first signal transmission unit that transmits a signal indicating status confirmation to the container to be monitored, and
It has a first detection unit that detects a failure of the monitoring target container based on the response status of the monitoring target container to a signal transmitted by the first signal transmission unit.
The second monitoring container is
A second signal transmission unit that transmits a signal indicating status confirmation to the first monitoring container, and
It has a second detection unit that detects a failure of the first monitoring container based on the response status of the first monitoring container to a signal transmitted by the second signal transmission unit.
Distributed container monitoring system. The distributed container monitoring system according to claim 1.
It has a plurality of monitoring containers that can monitor the monitored container.
Each of the monitoring containers further has a role-determining unit that determines whether to function as the first monitoring container or the second monitoring container.
Distributed container monitoring system. The distributed container monitoring system according to claim 2.
When the failure of the first monitoring container is detected by the second detection unit, the role determining unit causes another monitoring container to function as the first monitoring container.
Distributed container monitoring system. The distributed container monitoring system according to claim 1 or 2.
The first monitoring container is
When the failure of the container to be monitored is detected by the first detection unit, it further has a recovery unit that performs restoration processing of the container environment.
Distributed container monitoring system. It is a distributed container monitoring method executed by a distributed container monitoring system that monitors the operating status of the monitored container.
The first monitoring container that monitors the monitored container and
It has a second monitoring container that monitors the first monitoring container, and
In the first monitoring container,
The first signal transmission step of transmitting a signal indicating status confirmation to the monitored container, and
A first detection step of detecting a failure of the monitored container based on the response status of the monitored container to the signal transmitted in the first signal transmission step is included.
In the second monitoring container,
A second signal transmission step of transmitting a signal indicating status confirmation to the first monitoring container, and
A second detection step of detecting a failure of the first monitoring container based on the response status of the first monitoring container to the signal transmitted in the second signal transmission step is included.
Distributed container monitoring method.

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