HACMP 주요 데몬

* cluster 관련 subsystem들을 확인하는 명령어

 

#clshowsrv -v
Status of the RSCT subsystems used by PowerHA SystemMirror:
Subsystem         Group            PID          Status
 cthags           cthags           7209208      active
 ctrmc            rsct             7143644      active

 

Status of the PowerHA SystemMirror subsystems:
Subsystem         Group            PID          Status
 clstrmgrES       cluster          6357098      active

 

Status of the CAA subsystems:
Subsystem         Group            PID          Status
 clcomd           caa              5898440      active
 clconfd          caa              7012604      active

 

Details of PowerHA SystemMirror cluster manager:
Current state: ST_INIT
sccsid = "@(#)36 1.135.10.1 src/43haes/usr/sbin/cluster/hacmprd/main.C,hacmp.pe,61haes_r713,1614A_hacmp713 7/31/15"
build = "Oct 30 2017 12:16:40 1740D_aha713"

 

* HACMP의 구동 프로세스
  
Main HACMP and RSCT daemons

 

Cluster Manager Daemon - clstrmgrES
The main HACMP daemon that maintains a global view of the cluster and runs event scripts in response to changes or user requests. It maintains updated information about the location and status of all resource groups.
From HACMP V5.3 the clstrmgr daemon is started via init process and should always be running.

 

Cluster Communication Daemon - clcomdES
Provides secure communication between cluster nodes.
The clcomd daemon is started automatically at boot time by the init process. Starting with Version 5.2, clcomdES must be running before any cluster services can be started.

 

Cluster Information Program - clinfoES
The clinfoES daemon provides status information about the cluster to cluster nodes and clients and calls the /usr/es/sbin/cluster/etc/clinfo.rc script in response to a cluster event. The clinfo daemon is optional on cluster nodes and clients.

 

Cluster Topology Services Subsystem - topsvcsd
The RSCT Toplogy Services subsystem monitors the status of network interfaces and use the daemons hatsd and hats_nim.

 

Cluster Group Services Subsystem - hagsd
This RSCT subsystem provides reliable communication and protocols required for cluster operation.

 

Cluster Globalized Server daemon - grpglsmd
This RSCT daemon operates as a Group Services client; its function is to make switch adapter membership global across all cluster nodes. All cluster nodes must run the grpglsmd daemon.

 

Resource Monitoring and Control Subsystem
This RSCT subsystem acts as a resource monitor for the event management subsystem and provides information about the operating system characteristics and utilization. The RMC subsystem must be running on each node in the cluster. By default the rmcd daemon is setup to start from inittab when it is installed. The rc.cluster script ensures the RMC subsystem is running.