A basic configuration.

<IfModule mod_csr.c>
<Location /csr>
  SetHandler csr
#  CsrRACertificate /tmp/ra-cert.pem
#  CsrRAKey /tmp/ra-key.pem
  CsrSubjectRequest O
  CsrSubjectRequest countryName
  CsrSubjectRequest stateOrProvinceName
  CsrSubjectRequest commonName
  CsrSubjectCGI OU UNIQUE_ID
  CsrSubjectSet OU "Test Certificate"
  CASimpleCertificate /etc/pki/certs/ca-cert.pem
  CASimpleKey /etc/pki/certs/ca-key.pem
  CASimpleSerialRandom on
  CASimpleTime on
  CADiskCertificateSignRequestPath /etc/pki/ca/
  CADiskCertificateByTransactionPath /etc/pki/ca/
</Location>
</IfModule>