How can I upload keytab file onto Openshift?

I use kafka module published by mendix.I need to use kerberos auth to produce data to kafka.For this, Path of keytab file is needed in sasl jaas configuration in kafka module.I  connect and produce data to kafka in my local computer but when application deployed to openshift,i don't know how keytab file to upload to openshift.In that case, i cannot get path of keytab file in openshift.How can i upload keytab file to openshift and get path of this file?
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