docker/openldap/Dockerfile

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FROM alpine

RUN apk add --no-cache openldap openldap-back-hdb openldap-clients openssl

ADD slapd-config.ldif slapd-data.ldif /tmp/

# Generate a self-signed SSL certificate
RUN openssl req -newkey rsa:4096 -sha512 -x509 -days 3650 -nodes \
    -subj "/C=NA/ST=NA/L=NA/O=NA/CN=example.com" \
    -out /etc/ssl/certs/ldap.pem -keyout /etc/ssl/private/ldap.pem && \
    chown root:ldap /etc/ssl/private/ldap.pem && \
    chmod 640 /etc/ssl/private/ldap.pem

# Inject configuration
RUN mkdir /etc/openldap/slapd.d && \
    slapadd -d -1 -F /etc/openldap/slapd.d -n 0 -l /tmp/slapd-config.ldif

# Inject data
RUN slapadd -d 1 -F /etc/openldap/slapd.d -l /tmp/slapd-data.ldif

# Fix permissions
RUN chown -R ldap:ldap /var/lib/openldap && \
    chown -R ldap:ldap /etc/openldap/slapd.d

EXPOSE 389 636

CMD /usr/sbin/slapd -d 256 -u ldap -g ldap -F /etc/openldap/slapd.d -h "ldap:/// ldaps:///"