This template has already been configured to work with the URL it-graylog.ls.lsst.org. If you require a clean install/template, I recommend grab the template from helm:
helm template graylog -n graylog stable/graylog -f values
For further instructions or references, check https://ittn-012.lsst.io
Depending on the site and instance, you must browse into the folder first. i.e Base IT Graylog -> ls/it-graylog
First create the namespace 'graylog', and then run deploy.sh
./deploy.sh
To delete everything, run the undeploy.sh script
./undeploy.sh