docker-openldap/image/service/slapd/container-start.sh

#!/bin/bash -e

FIRST_START_SETUP_DONE="/container/run/state/slapd-first-start-setup-done"
WAS_STARTED_WITH_TLS="/etc/ldap/slapd.d/docker-openldap-was-started-with-tls"
WAS_STARTED_WITH_REPLICATION="/etc/ldap/slapd.d/docker-openldap-was-started-with-replication"

# Reduce maximum number of number of open file descriptors to 1024
# otherwise slapd consumes two orders of magnitude more of RAM
# see https://github.com/docker/docker/issues/8231
ulimit -n 1024

# fix file permissions
chown -R openldap:openldap /var/lib/ldap
chown -R openldap:openldap /etc/ldap
chown -R openldap:openldap /container/service/slapd

# container first start
if [ ! -e "$FIRST_START_SETUP_DONE" ]; then

  function get_ldap_base_dn() {
    LDAP_BASE_DN=""
    IFS='.' read -ra LDAP_BASE_DN_TABLE <<< "$LDAP_DOMAIN"
    for i in "${LDAP_BASE_DN_TABLE[@]}"; do
      EXT="dc=$i,"
      LDAP_BASE_DN=$LDAP_BASE_DN$EXT
    done

    LDAP_BASE_DN=${LDAP_BASE_DN::-1}
  }

  function is_new_schema() {
    local COUNT=$(ldapsearch -Q -Y EXTERNAL -H ldapi:/// -b cn=schema,cn=config cn | grep -c $1)
    if [ "$COUNT" -eq 0 ]; then
      echo 1
    else
      echo 0
    fi
  }

  function check_tls_files() {

    local CA_CRT=$1
    local LDAP_CRT=$2
    local LDAP_KEY=$3

    cfssl-helper ldap "/container/service/slapd/assets/certs/$LDAP_CRT" "/container/service/slapd/assets/certs/$LDAP_KEY" "/container/service/slapd/assets/certs/$CA_CRT"

    # create DHParamFile if not found
    [ -f /container/service/slapd/assets/certs/dhparam.pem ] || openssl dhparam -out /container/service/slapd/assets/certs/dhparam.pem 2048
    chmod 600 /container/service/slapd/assets/certs/dhparam.pem

    # fix file permissions
    chown -R openldap:openldap /container/service/slapd
  }


  BOOTSTRAP=false

  # database and config directory are empty -> set bootstrap config
  if [ -z "$(ls -A /var/lib/ldap)" ] && [ -z "$(ls -A /etc/ldap/slapd.d)" ]; then

    BOOTSTRAP=true
    echo "database and config directory are empty"
    echo "-> set bootstrap config"

    cat <<EOF | debconf-set-selections
slapd slapd/internal/generated_adminpw password ${LDAP_ADMIN_PASSWORD}
slapd slapd/internal/adminpw password ${LDAP_ADMIN_PASSWORD}
slapd slapd/password2 password ${LDAP_ADMIN_PASSWORD}
slapd slapd/password1 password ${LDAP_ADMIN_PASSWORD}
slapd slapd/dump_database_destdir string /var/backups/slapd-VERSION
slapd slapd/domain string ${LDAP_DOMAIN}
slapd shared/organization string ${LDAP_ORGANISATION}
slapd slapd/backend string HDB
slapd slapd/purge_database boolean true
slapd slapd/move_old_database boolean true
slapd slapd/allow_ldap_v2 boolean false
slapd slapd/no_configuration boolean false
slapd slapd/dump_database select when needed
EOF

    dpkg-reconfigure -f noninteractive slapd

  elif [ -z "$(ls -A /var/lib/ldap)" ] && [ ! -z "$(ls -A /etc/ldap/slapd.d)" ]; then
    echo "Error: the database directory (/var/lib/ldap) is empty but not the config directory (/etc/ldap/slapd.d)"
    exit 1
  elif [ ! -z "$(ls -A /var/lib/ldap)" ] && [ -z "$(ls -A /etc/ldap/slapd.d)" ]; then
    echo "the config directory (/etc/ldap/slapd.d) is empty but not the database directory (/var/lib/ldap)"
    exit 1

  else
    # there is an existing database and config

    # if the config was bootstraped with TLS
    # to avoid error (#6) we check tls files
    if [ -e "$WAS_STARTED_WITH_TLS" ]; then

      . $WAS_STARTED_WITH_TLS

      check_tls_files $PREVIOUS_LDAP_TLS_CA_CRT_FILENAME $PREVIOUS_LDAP_TLS_CRT_FILENAME $PREVIOUS_LDAP_TLS_KEY_FILENAME
    fi
  fi

  # start OpenLDAP


  function startOpenLDAP(){

    if [ -n "$PREVIOUS_HOSTNAME" ]; then
      PREVIOUS_HOSTNAME="ldap://$PREVIOUS_HOSTNAME"
    fi

    #start openldap normaly
    echo -n "Starting openldap..."
    slapd -h "ldap://$HOSTNAME $PREVIOUS_HOSTNAME ldap://localhost ldapi:///" -u openldap -g openldap
    echo "[ok]"
  }

  # start OpenLDAP with previous replication configuration
  if [ -e "$WAS_STARTED_WITH_REPLICATION" ]; then

    . $WAS_STARTED_WITH_REPLICATION

    if [ "$PREVIOUS_HOSTNAME" != "$HOSTNAME" ]; then
      echo "127.0.0.2 $PREVIOUS_HOSTNAME" >> /etc/hosts
    else
      PREVIOUS_HOSTNAME=""
    fi
  fi

  startOpenLDAP

  # set bootstrap config part 2
  if $BOOTSTRAP; then

    # add ppolicy schema
    ldapadd -c -Y EXTERNAL -Q -H ldapi:/// -f /etc/ldap/schema/ppolicy.ldif

    # convert schemas to ldif
    SCHEMAS=""
    for f in $(find /container/service/slapd/assets/config/bootstrap/schema -name \*.schema -type f); do
      SCHEMAS="$SCHEMAS ${f}"
    done
    /container/service/slapd/assets/schema-to-ldif.sh "$SCHEMAS"

    # add schemas
    for f in $(find /container/service/slapd/assets/config/bootstrap/schema -name \*.ldif -type f); do
      echo "Processing file ${f}"
      # add schema if not already exists
      SCHEMA=$(basename "${f}" .ldif)
      ADD_SCHEMA=$(is_new_schema $SCHEMA)
      if [ "$ADD_SCHEMA" -eq 1 ]; then
        echo "add schema ${SCHEMA}"
        ldapadd -c -Y EXTERNAL -Q -H ldapi:/// -f $f
      else
        echo "schema ${f} already exists"
      fi
    done

    # set config password
    LDAP_CONFIG_PASSWORD_ENCRYPTED=$(slappasswd -s $LDAP_CONFIG_PASSWORD)
    sed -i --follow-symlinks "s|{{ LDAP_CONFIG_PASSWORD_ENCRYPTED }}|${LDAP_CONFIG_PASSWORD_ENCRYPTED}|g" /container/service/slapd/assets/config/bootstrap/ldif/01-config-password.ldif

    # adapt security config file
    get_ldap_base_dn
    sed -i --follow-symlinks "s|{{ LDAP_BASE_DN }}|${LDAP_BASE_DN}|g" /container/service/slapd/assets/config/bootstrap/ldif/02-security.ldif

    # process config files in bootstrap directory (do no process files in subdirectories)
    for f in $(find /container/service/slapd/assets/config/bootstrap/ldif -mindepth 1 -maxdepth 1 -type f -name \*.ldif  | sort); do
      echo "Processing file ${f}"
      ldapmodify -Y EXTERNAL -Q -H ldapi:/// -f $f
    done

    # read only user
    if [ "${LDAP_READONLY_USER,,}" == "true" ]; then

      echo "Add read only user"

      LDAP_READONLY_USER_PASSWORD_ENCRYPTED=$(slappasswd -s $LDAP_READONLY_USER_PASSWORD)
      sed -i --follow-symlinks "s|{{ LDAP_READONLY_USER_USERNAME }}|${LDAP_READONLY_USER_USERNAME}|g" /container/service/slapd/assets/config/bootstrap/ldif/readonly-user/readonly-user.ldif
      sed -i --follow-symlinks "s|{{ LDAP_READONLY_USER_PASSWORD_ENCRYPTED }}|${LDAP_READONLY_USER_PASSWORD_ENCRYPTED}|g" /container/service/slapd/assets/config/bootstrap/ldif/readonly-user/readonly-user.ldif
      sed -i --follow-symlinks "s|{{ LDAP_BASE_DN }}|${LDAP_BASE_DN}|g" /container/service/slapd/assets/config/bootstrap/ldif/readonly-user/readonly-user.ldif

      sed -i --follow-symlinks "s|{{ LDAP_READONLY_USER_USERNAME }}|${LDAP_READONLY_USER_USERNAME}|g" /container/service/slapd/assets/config/bootstrap/ldif/readonly-user/readonly-user-acl.ldif
      sed -i --follow-symlinks "s|{{ LDAP_BASE_DN }}|${LDAP_BASE_DN}|g" /container/service/slapd/assets/config/bootstrap/ldif/readonly-user/readonly-user-acl.ldif

      echo "Processing file /container/service/slapd/assets/config/bootstrap/ldif/readonly-user/readonly-user.ldif"
      ldapmodify -h localhost -p 389 -D cn=admin,$LDAP_BASE_DN -w $LDAP_ADMIN_PASSWORD -f /container/service/slapd/assets/config/bootstrap/ldif/readonly-user/readonly-user.ldif

      echo "Processing file /container/service/slapd/assets/config/bootstrap/ldif/readonly-user/readonly-user-acl.ldif"
      ldapmodify -Y EXTERNAL -Q -H ldapi:/// -f /container/service/slapd/assets/config/bootstrap/ldif/readonly-user/readonly-user-acl.ldif

    fi

  fi

  # tls config
  if [ "${LDAP_TLS,,}" == "true" ]; then

    echo "Use TLS"

    check_tls_files $LDAP_TLS_CA_CRT_FILENAME $LDAP_TLS_CRT_FILENAME $LDAP_TLS_KEY_FILENAME

    # adapt tls ldif
    sed -i --follow-symlinks "s|{{ LDAP_TLS_CA_CRT_FILENAME }}|${LDAP_TLS_CA_CRT_FILENAME}|g" /container/service/slapd/assets/config/tls/tls-enable.ldif
    sed -i --follow-symlinks "s|{{ LDAP_TLS_CRT_FILENAME }}|${LDAP_TLS_CRT_FILENAME}|g" /container/service/slapd/assets/config/tls/tls-enable.ldif
    sed -i --follow-symlinks "s|{{ LDAP_TLS_KEY_FILENAME }}|${LDAP_TLS_KEY_FILENAME}|g" /container/service/slapd/assets/config/tls/tls-enable.ldif

    sed -i --follow-symlinks "s|{{ LDAP_TLS_CIPHER_SUITE }}|${LDAP_TLS_CIPHER_SUITE}|g" /container/service/slapd/assets/config/tls/tls-enable.ldif
    sed -i --follow-symlinks "s|{{ LDAP_TLS_PROTOCOL_MIN }}|${LDAP_TLS_PROTOCOL_MIN}|g" /container/service/slapd/assets/config/tls/tls-enable.ldif
    sed -i --follow-symlinks "s|{{ LDAP_TLS_VERIFY_CLIENT }}|${LDAP_TLS_VERIFY_CLIENT}|g" /container/service/slapd/assets/config/tls/tls-enable.ldif

    ldapmodify -Y EXTERNAL -Q -H ldapi:/// -f /container/service/slapd/assets/config/tls/tls-enable.ldif

    [[ -f "$WAS_STARTED_WITH_TLS" ]] && rm -f "$WAS_STARTED_WITH_TLS"
    touch $WAS_STARTED_WITH_TLS
    echo "export PREVIOUS_LDAP_TLS_CA_CRT_FILENAME=${LDAP_TLS_CA_CRT_FILENAME}" >> $WAS_STARTED_WITH_TLS
    echo "export PREVIOUS_LDAP_TLS_CRT_FILENAME=${LDAP_TLS_CRT_FILENAME}" >> $WAS_STARTED_WITH_TLS
    echo "export PREVIOUS_LDAP_TLS_KEY_FILENAME=${LDAP_TLS_KEY_FILENAME}" >> $WAS_STARTED_WITH_TLS
    chmod +x $WAS_STARTED_WITH_TLS

    # ldap client config
    sed -i --follow-symlinks "s,TLS_CACERT.*,TLS_CACERT /container/service/slapd/assets/certs/${LDAP_TLS_CA_CRT_FILENAME},g" /etc/ldap/ldap.conf
    echo "TLS_REQCERT demand" >> /etc/ldap/ldap.conf

    [[ -f "$HOME/.ldaprc" ]] && rm -f $HOME/.ldaprc
    touch $HOME/.ldaprc
    echo "TLS_CERT /container/service/slapd/assets/certs/${LDAP_TLS_CRT_FILENAME}" >> $HOME/.ldaprc
    echo "TLS_KEY /container/service/slapd/assets/certs/${LDAP_TLS_KEY_FILENAME}" >> $HOME/.ldaprc

  else

    echo "Don't use TLS"

    ldapmodify -c -Y EXTERNAL -Q -H ldapi:/// -f /container/service/slapd/assets/config/tls/tls-disable.ldif || true
    [[ -f "$WAS_STARTED_WITH_TLS" ]] && rm -f "$WAS_STARTED_WITH_TLS"

  fi


  function disableReplication() {
    echo "Try to disable replication"
    ldapmodify -c -Y EXTERNAL -Q -H ldapi:/// -f /container/service/slapd/assets/config/replication/replication-disable.ldif || true
    [[ -f "$WAS_STARTED_WITH_REPLICATION" ]] && rm -f "$WAS_STARTED_WITH_REPLICATION"
  }

  # replication config
  if [ "${LDAP_REPLICATION,,}" == "true" ]; then

    echo "Use replication"
    disableReplication || true

    i=1
    for host in $(complex-bash-env iterate "${LDAP_REPLICATION_HOSTS}")
    do
      sed -i --follow-symlinks "s|{{ LDAP_REPLICATION_HOSTS }}|olcServerID: $i ${host}\n{{ LDAP_REPLICATION_HOSTS }}|g" /container/service/slapd/assets/config/replication/replication-enable.ldif
      sed -i --follow-symlinks "s|{{ LDAP_REPLICATION_HOSTS_CONFIG_SYNC_REPL }}|olcSyncRepl: rid=00$i provider=${host} ${LDAP_REPLICATION_CONFIG_SYNCPROV}\n{{ LDAP_REPLICATION_HOSTS_CONFIG_SYNC_REPL }}|g" /container/service/slapd/assets/config/replication/replication-enable.ldif
      sed -i --follow-symlinks "s|{{ LDAP_REPLICATION_HOSTS_HDB_SYNC_REPL }}|olcSyncRepl: rid=10$i provider=${host} ${LDAP_REPLICATION_HDB_SYNCPROV}\n{{ LDAP_REPLICATION_HOSTS_HDB_SYNC_REPL }}|g" /container/service/slapd/assets/config/replication/replication-enable.ldif

      ((i++))
    done

    get_ldap_base_dn
    sed -i --follow-symlinks "s|\$LDAP_BASE_DN|$LDAP_BASE_DN|g" /container/service/slapd/assets/config/replication/replication-enable.ldif
    sed -i --follow-symlinks "s|\$LDAP_ADMIN_PASSWORD|$LDAP_ADMIN_PASSWORD|g" /container/service/slapd/assets/config/replication/replication-enable.ldif
    sed -i --follow-symlinks "s|\$LDAP_CONFIG_PASSWORD|$LDAP_CONFIG_PASSWORD|g" /container/service/slapd/assets/config/replication/replication-enable.ldif

    sed -i --follow-symlinks "/{{ LDAP_REPLICATION_HOSTS }}/d" /container/service/slapd/assets/config/replication/replication-enable.ldif
    sed -i --follow-symlinks "/{{ LDAP_REPLICATION_HOSTS_CONFIG_SYNC_REPL }}/d" /container/service/slapd/assets/config/replication/replication-enable.ldif
    sed -i --follow-symlinks "/{{ LDAP_REPLICATION_HOSTS_HDB_SYNC_REPL }}/d" /container/service/slapd/assets/config/replication/replication-enable.ldif

    echo "Enable replication"
    ldapmodify -c -Y EXTERNAL -Q -H ldapi:/// -f /container/service/slapd/assets/config/replication/replication-enable.ldif || true

    [[ -f "$WAS_STARTED_WITH_REPLICATION" ]] && rm -f "$WAS_STARTED_WITH_REPLICATION"
    touch $WAS_STARTED_WITH_REPLICATION
    echo "export PREVIOUS_HOSTNAME=${HOSTNAME}" >> $WAS_STARTED_WITH_REPLICATION
    chmod +x $WAS_STARTED_WITH_REPLICATION

  else

    echo "Don't use replication"
    disableReplication || true

  fi

  # stop OpenLDAP
  SLAPD_PID=$(cat /run/slapd/slapd.pid)
  echo -n "Kill slapd, pid: $SLAPD_PID..."
  kill -15 $SLAPD_PID
  # wait until slapd is terminated
  while [ -e /proc/$SLAPD_PID ]; do sleep 0.1; done
  echo "[ok]"

  touch $FIRST_START_SETUP_DONE
fi

exit 0