Google Cloud Performance Monitoring

Google Cloud Monitoring

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

Prerequisites
Web
LPAR2RRD
Google Cloud

Follow installation procedure for your operating system platform

Implementation is agentless, all data is gathered from Google Cloud API with Authorization token from Google SDK.

Install Google Cloud SDK

Install as root
Note that Virtual Appliance v2.80 is shipped with pre-installed Google Cloud SDK.
Follow installation guide, RHEL 7 / CentOS 7 packages
Initialize after installation
```
# gcloud init
```

Login to cloud account with provided link
You must log in to continue. Would you like to log in (Y/n)? Y
Go to the following link in your browser: https://accounts.google.com/o/oauth1/auth?code_challenge=...

Enter verification code:

Select the project to be monitored

Pick cloud project to use:
 [1] ...
 [2] ...
 [3] Create a new project
Please enter numeric choice or text value (must exactly match list item):

Default zone is not required

Do you want to configure a default Compute Region and Zone? (Y/n)?  n

Create Service account and download credentials file

Login to google cloud console
Select the project to be monitored
Go to APIs & Services -> Credentials
Click on "Create Credentials" and select "Service Account"
Enter service account name and description, Create
Add "Monitoring Viewer" and "Compute Viewer" roles
Click on "Done"
Edit the new account
Click on "Add Key" and select "Create new key"
Select key type "JSON"
Save the credentials file.

Configure Google Cloud in LPAR2RRD

LPAR2RRD UI ➡ Settings icon ➡ Google Cloud ➡ New
Enter Host alias
Select the credentials file (json)
Make sure cron job for Google Cloud is 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_gcloud.sh"
$
```
Add following lines to crontab if necessary
```
$ crontab -e

# Google Cloud support
0,20,40 * * * *  /home/lpar2rrd/lpar2rrd/load_gcloud.sh > /home/lpar2rrd/lpar2rrd/load_gcloud.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 (all under lpar2rrd user)

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
```
Make sure you have a cron job for Google Cloud is in place (upgrade script might do it automatically) Skip it on the Virtual Appliance, it is already there.
```
$ crontab -l | grep "load_gcloud.sh"
$
```
Add it if it does not exist like above
```
$ crontab -e

# Google Cloud support
0,20,40 * * * *  /home/lpar2rrd/lpar2rrd/load_gcloud.sh > /home/lpar2rrd/lpar2rrd/load_gcloud.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