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리소스 타입
It is classified resources according the types and has different attributes for each type.
MCCS provides various resource types as shown in below.
Resource Type
[Figure] Resource Types in the MCCS for Linux
Network Interface card(NIC)
MCCS monitor the TCP/IP based network connectivity.
It detects the network unplug, ethernet adapter failure, or cable failure.
IP Address
MCCS manages virtual IP address and subnet mask which will be assigned on a NIC and switchable node to node in case it reacts in the same manner as the node's real IP address. A real IP address which is static must be set in the NIC to add on a virtual IP address.
Process
Process is used when register single execution file. MCCS detects the failures by checking if the process name exists in the process table of operating system.
Application
It is similar to process. But this is more complicated. Application works with several application or scripts such as tomcat.
MCCS does only detect on execution file, but it also brings online/ take offline/monitor the process by using pre-defined script.
Shared Disk
There are two systems connected to external shared storage and MCCS monitor the health status of I/O path to the file system.
Mirror Disk
When clustered nodes does not use shared storage, the data will be stored in each of local disk or direct attache storage.
In this environment, the mirroring component is needed through TCP/IP connection between nodes to synchronize the changed data.
Service
The service manages the process sets managed by the linux daemon.
SCSI Reservation
SCSI reservation agents manage LUN based locking using the SCSI3-PR (Persistent Reservation) protocols that shared storages support such as SAN.
This function can prevent data losses when no nodes in a cluster know the status of other nodes.
Oracle database
This resource controls the Oracle database.
It detects the Oracle database installed on the system, controls the service and monitors the status.
Oracle Listener
This resource controls the listener process of the Oracle DB.
When you add a resource, this will be classified under the type as tree view structure.
For an example, when you add two NIC resource, these will be classified under the NIC type as shown below.
If you edit an attribute of resource type, this will affect all of the resources classified this type.
[Figure] Classifying of resources under the type
그림에서 보여지는 네트워크 카드 리소스인 eth0 과 eth1은 네트워크 카드 리소스 타입에 포함되는 리소스입니다As shown in the figure, eth0 and eth1 are the resources included in the NIC resource type.
If you edit an attribute of resource type, this will affect all of the resources classified this type.
For an example, if the value of MonitorInterval of NIC resource type is edited to 30 sec, this will be applied to all of NIC resource.
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Resource Type Attribute
Resource type has specified attributes for each type.
For an example, when compare to NIC and mirror disk, each service has different characteristics and has specific monitor interval, online/offline timeout and managed policies
또한 고가용성 클러스터링을 구성한 환경에서도 네트워크 상태가 좋지 못한 경우에는 모니터링 타임아웃 값의 조정이 필요할 수가 있습니다. 이런 요구에 따라 타입 별로 각각의 속성을 변경할 수가 있습니다.
리소스 타입 속성은 MCCS 콘솔의 리소스 타입 속성에서 확인 할 수 있습니다.
In addition, even in the environment where high availability clusters are configured, if the network condition is not good, you need to adjust the monitoring timeout.
Depending on the requests, you can change the attribute of each type.
Resource type attribute can be checked in the resource type attribute menu of the MCCS web console.
[Figure] Resource Type Attribute View
Attribute | Description | Type | Default | Edit | |||
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| Actions | It indicates valid operations of resources of Define the resource type. Values are OnOnly (can online only), OnOFF(can online and offline), None (cannot online and offline)operation type. | STRING | X | ||||
| ArgList | It is the list of specified attributes in the resource attributes view. It can be checked in represents the necessary arguments for each type of resource. | STRING | X | ||||
| CleanTimeout | It indicates represents the maximum waiting time from the out until execution of the Clean command to the completion of Clean. If this value CleanProgram is finished. | INTEGER60초 | 60 sec | O | |||
| FaultOnMonitorTimeouts | If monitor timeouts take place as much as the timeout specified by this value , this value executes the Clean command and considers it as a failure, or restarts as much as the 'RestartLimit' valueoccurs, it is regarded as trouble. | INTEGER4회 | 4 times | O | |||
| MonitorInterval | It indicates represents the time interval to until the next monitoring when of online resources are monitoredresource. | INTEGER10초 | 10 sec | O | |||
| MonitorTimeout | It is represents the maximum time within which the monitor entry point must complete or else be terminated. (unit = second)time elapsed until monitoring is finished or terminated. | INTEGER10초 | 10 sec | O | |||
| OfflineMonitorInterval | 60초 It indicates is the time interval until the next monitoring when of offline resources are monitoredresource. | INTEGER | . | INTEGER | 60 sec | O | |
| OfflineTimeout | It represents the max time until the final decision is made on the success/failure of resource going offline. | INTEGER | 300 sec | O | |||
| OnlineRetryLimit | It indicate Set the number of retry count retries if it fails to start resourcethe resource fails to restart. | INTEGER | 0 time | O | |||
| OnlineTimeout | It represents the max time until the final decision is made on the success/failure of resource going online. | INTEGER | 0회300 sec | O | |||
| ToleranceLimitOnlineTrustTime | It is the time to reset the restart number of resource. | INTEGER | 600 sec | O | |||
| OnlineWaitLimit | If the time our occurs while determining whether the resource goes online properly, it will retry as many times as defined if the monitoring result cannot be trusted. In general, if the result of the ICMP ping test with a network interface card cannot be trusted, | NTEGER | 2 times | O | |||
| * ToleranceLimit | 0회 When the monitoring results cannot be trusted , monitoring will be retried as many times as defined. It is not used for on-off resources. (unit = count) | INTEGER | designated. | INTEGER | 0 time | O |
CLI
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Use (mctype
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command)
리소스 타입에 관한 명령을 전달 합니다. 리소스 타입에 대해 속성 조회, 속성 값 변경 명령을 내릴 수 있습니다Sends command related the resource type. You can command to inquire about the attribute or change the attribute values.
| Info |
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MCCS 는 설치시 최초 사용자 계정으로 id 가 When you install MCCS, the initial user account ID is set to 'admin' 암호가 and the password is set to 'password'인 계정을 생성합니다. |
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When you run the CLI command, you need to enter the ID and the password. Otherwise, the above initial ID and password will be used. |
Syntax
mctype [-u userid -pw password] -t resoruceType -a attribute |
Options Options
| Option | 설명Description |
-h | 도움말을 출력합니다Display Help. |
| -u | 사용자 계정을 지정합니다Designate the user ID. |
| -pw | 사용자 Password를 지정합니다Enter the user password with the -u option. |
-r | 수정할 리소스 타입 이름을 지정 합니다Designate the name of resource type to be modified. |
-a | 수정할 리소스 타입의 속성 이름을 지정합니다Designate the attribute names for the resource type to be modified. |
-list리소스 | 타입 리스트가 나열 됩니다Display the list of resource types. |
Example
modify
MirrorDisk의 MonitorInterval 속성값을 수정합니다Modify the MonitorInterval attribute values for MirrorDisk.
mctype -modify -t |
resoruceType -a |
attribute attribute_value |
list
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Display the attribute values for all the resource types.
(If you enter -t resourceType 입력시 지정한 리소스 타입에 대한 속성값이 출력됩니다, the attribute values for the designated resource type will be displayed.)
mcnode mctype -list [-t - resourceType] |