IBM’s Websphere MQ is a middle-ware application that allows two applications to pass messages back and forth without having to integrate with each-other directly. Websphere MQ is a fairly popular application in the enterprise especially for those running many java based programs.
Today’s article is a copy of my personal Websphere MQ cheat sheet. This cheat sheet is geared more from a System Administrators prospective and doesn’t touch much on creating or altering queues or channels, but should provide a good head start for those who need to just get something restarted.
This cheat sheet is split into two parts, the first being the Linux command line based commands and the second being the MQ CLI based commands.
Where the command starts with REPLACE will require replacing the information with information from your system
Linux Command Line Commands
The majority of these commands are run as the mqm (or equivalent) user. By default these commands are in
/opt/mqm/bin which I would advise adding to the mqm users PATH.
Create a Queue Manager
$ crtmqm REPLACE_QMGR_NAME
Delete a Queue Manager
$ dltmqm REPLACE_QMGR_NAME
Start Queue Manager
$ strmqm REPLACE_QMGR_NAME
Stopping Queue Manager
Wait for queue manager to shutdown
$ endmqm -w REPLACE_QMGR_NAME
$ endmqm -i REPLACE_QMGR_NAME
Start Queue Manager (Init Script)
By default Websphere MQ does not ship with an init script, you can add this functionality via a support pac (MSL1) provided by IBM.
$ service ibm.com-WebSphere_MQ start
Stopping Queue Manager (Init Script)
$ service ibm.com-WebSphere_MQ stop
Start MQ Listener
$ echo "start LISTENER(SYSTEM.DEFAULT.LISTENER.TCP)" | runmqsc REPLACE_QMGR_NAME
Stop MQ Listener
$ echo "stop LISTENER(SYSTEM.DEFAULT.LISTENER.TCP)" | runmqsc REPLACE_QMGR_NAME
Display Queue Managers & Status
Set MQ Privileges
In order for a Unix user to start utilizing MQ they must have the appropriate privileges. You can find the available privileges in IBM’s Documentation.
Set MQ Privileges By User
$ setmqaut -m REPLACE_QMGR_NAME -t qmgr -p REPLACE_USER REPLACE_PLUS_OR_MINUS_PRIVILEGE
Set MQ Privileges By Groups
$ setmqaut -m REPLACE_QMGR_NAME -t qmgr -g REPLACE_GROUP REPLACE_PLUS_OR_MINUS_PRIVILEGE
Display MQ Privileges
Display MQ Privileges By Users
$ dspmqaut -m REPLACE_QMGR_NAME -t qmgr -p REPLACE_USER
Display MQ Privileges By Groups
$ dspmqaut -m REPLACE_QMGR_NAME -t qmgr -g REPLACE_GROUP
Lookup MQ Error Numbers
$ mqrc REPLACE_ERROR_NUM
MQ Sample Scripts
Within the MQ release by IBM there is a package that contains sample scripts for MQ. There are about 3 of these sample scripts that I have found pretty useful.
Pop (GET) Messages off a queue
$ amqsget REPLACE_Q_NAME REPLACE_QMGR_NAME
This command will remove messages from the queue, only use this if you no longer want the messages in the queue.
Browse Messages in a queue
$ amqsbcg REPLACE_Q_NAME REPLACE_QMGR_NAME
Open a Queue for writing
$ amqsput REPLACE_Q_NAME REPLACE_QMGR_NAME
When you find yourself with a system that is connected to a repository but doesn’t see new messages you can try opening the queue for writing with amqsput to “refresh” the connectivity. You do not have to write anything to the queue. Simply open the queue and press
ctrl+d without typing any additional characters.
Open Websphere MQ CLI
$ runmqsc REPLACE_QMGR_NAME
Websphere MQ CLI Commands
The following commands are to be run directly from the MQ command line interface.
Start MQ Listener
Stop MQ Listener
Disable Channel Authentication
alter qmgr chlauth(disabled)
Channel Authentication is new as of MQ 7.0. If your systems don’t use it you can simply turn it off.
Display Local Queues only
Display Alias Queues only
Display Cluster Queues only
Display Channel Status
Display Local Queue Manager Information
Display Cluster Queue Manager Information
Show number of INPUT and OUTPUT threads open
display qstatus(REPLACE_Q_NAME) IPPROCS OPPROCS
Find Process ID of Processes Accessing Queue
display qstatus(REPLACE_Q_NAME) TYPE(HANDLE) ALL
Refresh Cluster Queue Manager