IBM Db2 Database Monitoring

IBM Db2 Monitoring

Skip Prerequisites, Web and LPAR2RRD tabs in case of configuring Virtual Appliance, Docker or a Container

Prerequisites
Web
LPAR2RRD
IBM Db2

Follow installation procedure for your operating system platform

It will be released in LPAR2RRD 7.60 (Jan 2022), let us know if you want to test it before

LPAR2RRD obtains data through ODBC modules

Prerequisites

Only Linux is supported, no AIX neither Solaris were tested so far.
You can skip it in case you use Xorux Virtual Appliance 7.60 which already contains ibm_data_server_driver_for_odbc_cli_linuxx64_v11.5.

Install Perl DBI and DBD::DB2 modules as per www.ibm.com/support/pages/db2-perl-database-interface-luw
Get from above page driver package of requested version (like ibm_data_server_driver_package_linuxx64_v11.5.tar.gz) and put it into /tmp

# under root user
umask 022
cd /tmp
tar xvfz /tmp/ibm_data_server_driver_package_linuxx64_v11.5.tar.gz
cd /tmp/dsdriver
./installDSDriver
. ./db2profile
export DB2_HOME=/tmp/dsdriver
export DB2LIB=/tmp/dsdriver/lib
cpan DBD::DB2
rm -rf dsdriver ibm_data_server_driver_package_linuxx64_v11.5.tar.gz
exit # of the root shell

Install IBM Db2 ODBC CLI driver as per www.ibm.com/support/pages/db2-odbc-cli-driver-download-and-installation-information
Get from above page ODBC driver package of requested version (like ibm_data_server_driver_for_odbc_cli_linuxx64_v11.5.tar.gz) and put it into /tmp
```
#  under lpar2rrd user
su - lpar2rrd
umask 022
cd /home/lpar2rrd
mkdir db2_cli_odbc_driver
cd db2_cli_odbc_driver
tar xvfz /tmp/ibm_data_server_driver_for_odbc_cli_linuxx64_v11.5.tar.gz
rm /tmp/ibm_data_server_driver_for_odbc_cli_linuxx64_v11.5.tar.gz
```

Edit /home/lpar2rrd/lpar2rrd/etc/lpar2rrd.cfg and set proper path

cd /home/lpar2rrd/lpar2rrd
vi etc/lpar2rrd.cfg

# IBM Db2 settings, put the path to the odbc driver
  DB2_CLI_DRIVER_INSTALL_PATH=/home/lpar2rrd/db2_cli_odbc_driver/odbc_cli/clidriver/

Connectivity check

Allow access from the LPAR2RRD host to IBM Db2 host.
Make sure you are using correct port.
Default port for IBM Db2 sessions is 25010.

$ perl /home/lpar2rrd/lpar2rrd/bin/conntest.pl 192.168.1.1 25010
  Connection to "192.168.1.1" on port "25010" is ok

Create DB user for LPAR2RRD

Create a database user with these privileges on each database on the host machine.

Create system user lpar2rrd if there isn't one:
www.ibm.com/docs/en/db2/11.1?topic=unix-creating-group-user-ids-db2-database-installation

Grant privileges to the user in the database.

GRANT createtab,bindadd,connect ON DATABASE TO USER lpar2rrd;
GRANT EXECUTE ON FUNCTION  SYSPROC.* TO USER lpar2rrd;
GRANT EXECUTE ON PROCEDURE SYSPROC.* TO USER lpar2rrd;
GRANT SELECT ON TABLE SYSIBMADM.DB2_MEMBER TO USER lpar2rrd;
CREATE SCHEMA lpar2rrd;

Attach IBM Db2 to LPAR2RRD

Add each database through the UI LPAR2RRD UI ➡ Settings icon ➡ IBM Db2 ➡ New :
Make sure cron jobs for IBM Db2 are in place (upgrade script might do it for you automatically)
Skip this step if you install the Virtual Appliance - it is already taken care of.
```
$ crontab -l | grep "load_db2.sh"
$
```
Add following lines to crontab if necessary
```
$ crontab -e

# IBM Db2 support
0,5,10,15,20,25,30,35,40,45,50,55 * * * *  /home/lpar2rrd/lpar2rrd/load_db2.sh > /home/lpar2rrd/lpar2rrd/load_db2.out 2>&1
```
Wait 30 minutes and then go to the web UI: http://<your web server>/lpar2rrd/
Use Ctrl-F5 to refresh the web browser cache.

Install LPAR2RRD server

Download the latest LPAR2RRD server
Upgrade your already running LPAR2RRD instance.

Install it:

# su - lpar2rrd
$ tar xvf lpar2rrd-7.XX.tar
$ cd lpar2rrd-7.XX
$ ./install.sh
$ cd /home/lpar2rrd/lpar2rrd

Make sure all Perl modules are in place
```
cd /home/lpar2rrd/lpar2rrd
. etc/lpar2rrd.cfg; $PERL bin/perl_modules_check.pl
```
If there is missing "LWP::Protocol::https" then check this docu to fix it

Enable Apache authorisation

umask 022
cd /home/lpar2rrd/lpar2rrd
cp html/.htaccess www
cp html/.htaccess lpar2rrd-cgi

Schedule to run it from lpar2rrd crontab (it might already exist there)
```
$ crontab -l | grep load.sh
$
```
Add if it does not exist as above
```
$ crontab -e

# LPAR2RRD UI
0,30 * * * * /home/lpar2rrd/lpar2rrd/load.sh > /home/lpar2rrd/lpar2rrd/load.out 2>&1 
```
Assure there is just one such entry in crontab.
You might need to add lpar2rrd user into /var/adm/cron/cron.allow (/etc/cron.allow on CentOS 8) if crontab command fails
Allow it for lpar2rrd user as root user.
```
# echo "lpar2rrd" >> /var/adm/cron/cron.allow
```

Assure you have a cron jobs for IBM Db2 in place (upgrade script might do it automatically) Skip it on the Virtual Appliance, it is already there.

$ crontab -l | grep "load_db2.sh"
$

Add it if it does not exist like above

$ crontab -e

# IBM Db2 support
0,5,10,15,20,25,30,35,40,45,50,55 * * * *  /home/lpar2rrd/lpar2rrd/load_db2.sh > /home/lpar2rrd/lpar2rrd/load_db2.out 2>&1

Initial start from cmd line:

$ cd /home/lpar2rrd/lpar2rrd
$ ./load.sh

Go to the web UI: http://<your web server>/lpar2rrd/
Use Ctrl-F5 to refresh the web browser cache.

Troubleshooting

If you have any problems with the UI then check:
(note that the path to Apache logs might be different, search apache logs in /var)

tail /var/log/httpd/error_log             # Apache error log
tail /var/log/httpd/access_log            # Apache access log
tail /var/tmp/lpar2rrd-realt-error.log    # STOR2RRD CGI-BIN log
tail /var/tmp/systemd-private*/tmp/lpar2rrd-realt-error.log # STOR2RRD CGI-BIN log when Linux has enabled private temp

Test of CGI-BIN setup
```
umask 022
cd /home/lpar2rrd/lpar2rrd/
cp bin/test-healthcheck-cgi.sh lpar2rrd-cgi/
```
go to the web browser: http://<your web server>/lpar2rrd/test.html
You should see your Apache, LPAR2RRD, and Operating System variables, if not, then check Apache logs for connected errors