Bash – Running a script file over ssh through sudo

I can log in to a remote machine as a user who can do sudo su -. I can't login as root.

I have a script locally that I want to run at the remote machine. Also, the script is sent there trough another script.

I can't figure out how. I've red quite a few Q&A's here but no success. The closest I have:

COMMAND_SSH="sudo -i <<\'EOF\'"`cat ./unifyServiceNode.sh`"\\nEOF\\n" ;;
...
while read HOST; do
  echo -e "\n\n======== $USER_@$HOST <-- $COMMAND_SSH =================\n\n";
  ssh -n -tt centos@$HOST "'$COMMAND_SSH'";
done < hosts.txt

This ends up with this output:

======== centos@somehost.com <-- sudo -i <<\'EOF\'
##
##  Creates a few links and scripts to unify the nodes maintainance.
##

  BB="/bb"
  NAME="bpds-api"
  NAME2="bpds-"

  mkdir -p $BB
  ln -s /opt/$NAME/logs/*.log $BB/log
  ln -s /opt/$NAME/conf/api/$NAME.yml $BB/conf.yml || ln -s /opt/$NAME/conf/api/$NAME2.yml $BB/conf.yml
  echo "systemctl \${1:-restart} "${@:2}" $NAME" > $BB/Sys
  echo "tail -\${1:-500f} $BB/log" > $BB/Tail
  echo "nano $BB/conf.yml" > $BB/Conf
  chmod a+x $BB/Sys $BB/Tail $BB/Conf
  echo "export PATH=\$PATH:$BB" >> ~/.bashrc
EOF
 =====================================


bash: sudo -i <<\EOF': command not found
bash: line 14: /bb/Sys: Permission denied
bash: line 15: /bb/Tail: Permission denied
bash: line 16: /bb/Conf: Permission denied
chmod: changing permissions of ‘/bb/Sys’: Operation not permitted
chmod: changing permissions of ‘/bb/Tail’: Operation not permitted
chmod: changing permissions of ‘/bb/Conf’: Operation not permitted
bash: -c: line 18: unexpected EOF while looking for matching `''
bash: -c: line 19: syntax error: unexpected end of file
Connection to somehost.com closed.

This is the "closest" because it sees the individual commands but is not under sudo, because the first line's <<EOF isn't (un)escaped properly.

**How should I execute an arbitrary script under sudo over ssh?"