A practical path to installing Liberty and z/OS Connect servers – 3 Initial customisation

Introduction

I’ll cover the instructions to install z/OS Connect, but the instructions are similar for other products. The steps are to create the minimum server configuration and gradually add more function to it.

The steps below guide you through

  1. Overview
  2. planning to help you decide what you need to create, and what options you have to choose
  3. initial customisation and creating a server,  creating defaults and creating function specific configuration files,  for example a file for SAF
  4. starting the server
  5. enable logon security and add SAF definitions
  6. add keystores for TLS, and client authentication
  7. adding an API and service application
  8. protecting the API and service applications
  9. collecting monitoring data including SMF
  10. use the MQ sample
  11. using WLM to classify a service

With each step there are instructions on how to check the work has been successful.

Copy the PDS from the install system to where they will run.

These files can be sent using FTP or XMIT.

Copy the product ZFS to where it will be used.

You can use DFDSS to dump the ZFS and move it to the SYSPLEX where it will be used.

  1. Mount the file system read/write for example /usr/lpp/IBM/zosconnect/v3r0beta
  2. Perform Setting up the product extensions directory.  You need to do this on each LPAR, as it set up files in /var/zosconnect
  3. Mount the file system READ
  4. Change the BPXPRMxx parmlib member so the file sytsem is mounted READ it at IPL
  5. You may want to create an alias /usr/zosc to the product executables.
    • ln -s /usr/lpp/IBM/zosconnect/v3r0beta/bin /usr/zosc

Create the angel started task if needed.

If you will be using an existing Angel you will need to set up RACF permissions.

Follow the instructions the z/OS Connect  documentation

  • If you need a named Angel, specify the value in the NAME=value.  You can specify NAME when you start the task.
  • You do not need to classify this in WLM as it uses little CPU once it has been started.

Create the file system for the server

  1. See Creating the z/OS Connect EE shared directory. You will need to know the path for server’s home directory. The path /var/zosconnect can only be used on the LPAR.   The files cannot be shared.
  2. If you need to allocate a file system.
    1. Allocate a ZFS. If the initial allocation of the ZFS is too small, then the ZFS will grow on demand, or using the zfsadm grow command to expand it.
    2. Mount the file system over the directory.
    3. Change the BPXPRMxx parmlib member so the file system is mounted RW at IPL.

Create the Z/OS Connect started task

See Creating a z/OS Connect Enterprise Edition server.

Using /usr/zosc alias defined above

export  WLP_USER_DIR=/var/zosconnect
/usr/zosc/zosconnect create default --template=zosconnect:default

If you need to start again, use the following to remove the server.

rm -r  /var/zosconnect/servers/default
  1. Copy BAQSTRT to the SYS1.PROCLIB concatenation, to the name you are going to use, BAQSTRT, BAQSTRT1 etc
  2. When you edit the member, use caps off to use lower case text in the member.
  3.  If you will be using MQ, add the MQ libraries to STEPLIB
    //STEPLIB   DD DSN=CSQ913.SCSQANLE,DISP=SHR 
    //          DD DSN=CSQ913.SCSQAUTH,DISP=SHR
  4. You may find it easier to remove the _CEE_RUNOPTS= and add
    //CEEOPTS DD DISP=SHR,DSN=...(CEEOPTS)

    to the JCL. This makes it easier to add CEE options, and specify storage heap and pool sizes.

  5. In my CEEOPTS I use RPTSTG(ON), to report the storage pool usage. This provides useful information which may be useful when investigating performance problems.
  6. Despite what the Liberty documentation says you do need
      • JVM_OPTIONS=<Optional JVM parameters>
    • for example
      • JVM_OPTIONS=-Xoptionsfile=/var/zosconnect/servers/default/jvm.options
  7. You may want a JVM specific to a server, as you may want to set some service specific options such as TLS trace.
  8. You may want to specify a default server name in the JCL parms. You can specify a different one when z/OS Connect is started.
  9. Specify WLP_USER_DIR for your server’s directory. You could make this as a parameter to the started task JCL if you want to provide isolation for the servers, and give each server its own file system.

Create the JVM options file

Go to the server’s directory.

cd /var/zosconnect/servers/default

use oedit jvm.options to create an EBCDIC file.

add

-Dcom.ibm.ws.zos.core.angelRequired=true 
#-Dcom.ibm.ws.zos.core.angelName=MYZANGL

The -Dcom.ibm.ws.zos.core.angelRequired=true option stops the server from starting if the angel process is not running. You get message:

CWWKB0116I: This server is not registered with an angel process even though it is configured to require registration with an angel process. This server is attempting to stop.

The option -Dcom.ibm.ws.zos.core.angelName=MYZANGL allows you to specify a non default angel process name. The # in front of the statement makes it into a comment.

add the following, if required, with your time zone.

-Duser.timezone=Europe/London

Override TCPIP

If you are using a non standard TCPIP, edit server.env and add

_BPXK_SETIBMOPT_TRANSPORT=TCPIP2

Tailor the server.xml file

It was easy to get my configuration options mixed up, and hard to compare two server configurations. I found it much easier to manage my configuration by putting the components into their own xml file. This also makes having shared components much easier to implement- as you just include the name of the shared file.

The configuration files have to be in ASCII, and you have to take care ensure the files are in the correct code page.

There are at least three ways of creating the .xml files (I use the third option through ISPF 3.17)

  1. using omvs commands to copy and edit existing ASCII files
  2. use omvs commands to create ASCII files
  3. use ispf option 3.17

1 Using omvs commands to copy an existing ascii file,  then edit it it

For example

cp server.xml httpEndpoint.xml

edit the httpEndpoint.xml to keep the <server> ,httpEndpoint information, </server> and delete the rest.  The file should look like

<server description="new server"> 
    <httpEndpoint id="defaultHttpEndpoint" 
                  host="*" 
                  httpPort="9080" 
                  httpsPort="9443" /> 
</server>

then edit the server.xml and replace

<httpEndpoint id="defaultHttpEndpoint" 
                  host="*" 
                  httpPort="9080" 
                  httpsPort="9443" />

with

<include location="${server.config.dir}/httpEndpoint.xml"/> 

Note: if you use the edit command source ? It should say ASCII already set.

2 Use OMVS to created and edit files

By default, if you edit a file in OMVS it becomes an EBCDIC file.

If you create a file without copying it, you need to use

touch httpEndpoint.xml 
chtag -t -c ISO8859-1 httpEndpoint.xml     
oedit httpEndpoint.xml

Make the same changes as above.

3 Use ispf option 3.17

If you use ISPF 3.17 (z/OS UNIX Directory List) you have more flexibility with editing files.

Edit server.xml

use the line commands mmmm and the primary command create to create a new member, give the new name when prompted, for example httpEndpoint.xml

Replace the lines you copied out with

	<include location="${server.config.dir}/httpEndpoint.xml"/>

and edit the file you just created to put <server> … </server> around the content.

Add more logging to the JCL’s STDOUT.

The default logging to the jobs STDOUT is only audit records. I found it much easier to include other levels of information so I did not have to keep looking in the message.log file. Note: the STDOUT content does not have time stamps so you do not know when the output was produced- so it is easier to use – but has less information!

I created logging.xml with the following content.

<server> 
 <logging 
 consoleLogLevel="INFO" 
 /> 

 <!-- this is a comment where I store trace information
   traceFormat="BASIC" traceSpecification="*=info:
       com.ibm.ws.security.*=fine:zos.native.03=fine" 
  end comment   -->  
</server>

I added

<include location="${server.config.dir}/logging.xml"/> 

to the server.xml file.

The consolLogLevel=”INFO” writes additional information to the STDOUT file, than the default AUDIT value which just outputs AUDIT records.

Define the http address and ports

Edit the httpEndpoint definitions

    <httpEndpoint id="defaultHttpEndpoint" 
                  accessLoggingRef="ALR" 
                  host="*" 
                  httpPort="9081" 
                  httpsPort="9443" /> 
    <httpAccessLogging 
       enabled="true" 
       id="ALR" 
       logFormat="%{c}a! %h %u %{t}W %q %r %s %b" 
   /> 

Check

  • host matches the TCPIP value to use. With my VIPA I specify the VIPA address host=”10.1.3.10”
  • httpPort – if you already have a Liberty instance running port 9081 will be in use by another server
  • httpsPort – if you already have a Liberty instance running port 9443 will be in use by another server

You will need the port values when you use the server.

The httpAccessLogging statement pointed to by accessLoggingRef, will create a log file with every attempt to use the server.

Example output

10.1.1.1! 10.1.1.1 ADCDC {12/Sep/2020:16:07:17 +0000} - 
GET /zosConnect/apis/stockmanager HTTP/1.1 200 296

Where 10.1.1.1 is the source IP address and ADCDC is the userid used.

By default this file is http_access.log in the …/logs directory.

See here for the format of the logFormat statement.

After tailoring

I did more packaging the content into include .xml files.

After my “repackaging” my server.xml file looked like

<?xml version="1.0" encoding="UTF-8"?> 
<server description="new server"> 
    <include location="${server.config.dir}/applicationMonitor"/> 
    <include location="${server.config.dir}/logging.xml"/> 
    <include location="${server.config.dir}/httpEndpoint.xml"/> 
    <include location="${server.config.dir}/cors.xml"/> 
    <include location="${server.config.dir}/config.xml"/> 
    <include location="${server.config.dir}/zosconect.xml"/>                                                                              
</server>

You can use ispf option 3.17 to list the files in the servers’s directory.

Once you have configured the server you can use the admin centre to manage the files.  This will require

<remoteFileAccess>  
    <writeDir>${server.config.dir}</writedir>
</remoteFileAccess>

Finally ! You can start the server.

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