When using poudriere, how to backup all the custom compiled options so that when creating a new instance/server all the defined ports could recompile as with the selected options.
for example, I create a package like this:
poudriere options -cj 11amd64 net/chrony
But wondering how to re-use does options to avoid having to configure them again when creating a new setup.
Check poudriere's manual page! You can simply copy from /usr/local/etc/poudriere.d/11amd64-default-options to another directory. The naming convention of directory is described in manual page.
If you don't have any difference between port options in different jails maybe you may want to use sets (with poudriere bulk -j yourjail -z yourset net/chrony) - in this case you don't have to copy files.