From 70ffd9b09c93f2a23ead9852008a24dbf3819626 Mon Sep 17 00:00:00 2001
From: Paul <paul@zom.bi>
Date: Sat, 9 Sep 2017 17:54:45 +0200
Subject: [PATCH] Initial commit

---
 .dockerignore                   |   3 +
 .gitignore                      |   1 +
 Dockerfile                      |  27 ++++++
 README.md                       |  30 ++++++
 docker-compose.yml              |  15 +++
 entrypoint.sh                   |  93 +++++++++++++++++++
 fixtures/config.ldif            | 156 ++++++++++++++++++++++++++++++++
 fixtures/example_structure.ldif |  49 ++++++++++
 8 files changed, 374 insertions(+)
 create mode 100644 .dockerignore
 create mode 100644 .gitignore
 create mode 100644 Dockerfile
 create mode 100644 README.md
 create mode 100644 docker-compose.yml
 create mode 100755 entrypoint.sh
 create mode 100644 fixtures/config.ldif
 create mode 100644 fixtures/example_structure.ldif

diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..9a98de6
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,3 @@
+docker-compose.yml
+.git/
+data/
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..8fce603
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+data/
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..1750f35
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,27 @@
+FROM debian:stretch
+EXPOSE 389
+
+ENV DEBIAN_FRONTEND noninteractive \
+    CONFDIR /etc/ldap/slapd.d \
+    DATADIR /var/lib/ldap
+
+# add our users and groups first to ensure their IDs get assigned consitently
+RUN groupadd -r -g 500 openldap && useradd -r -u 500 -g openldap openldap
+
+
+RUN \
+    apt-get update && \
+    apt-get install --yes --no-install-recommends \
+        slapd \
+        ldap-utils \
+        ca-certificates && \
+    # remove the default config, since the entrypoint
+    # will populate it by hand.
+    rm -rf /etc/ldap/slapd.d && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+COPY entrypoint.sh /entrypoint.sh
+COPY fixtures/ /usr/share/slapd/fixtures/
+
+ENTRYPOINT ["/entrypoint.sh"]
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..b8f7439
--- /dev/null
+++ b/README.md
@@ -0,0 +1,30 @@
+## slapd
+Slapd offers a LDAP server, which we mostly use for authentication of various
+services.
+Therefore, a lot of services have a direct (or indirect) dependency on this
+image.
+
+### Building slapd
+
+```
+docker build -t zombi/slapd .
+```
+
+### Running slapd
+
+```
+docker run -d --name ldap -v /data/ldap:/data -p 389:389 zombi/slapd
+```
+
+### Backing up data
+Data in this container is considered essential, since it influences almost
+all other services we run.
+
+We recently discovered that **simply copying all the data from `data` DOES
+NOT WORK**, therefore we included scripts for backing up the slapd database
+into a compact .ldif format.
+
+running `tools/create-ldap-backup.sh` will create two files:
+* `conf.ldif` is a backup of the configuration.
+* `data.ldif` contains all the saved datasets.
+
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..b21b3e9
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,15 @@
+version: '2'
+
+services:
+    ldap:
+        build: .
+        ports:
+            - "3810:389"
+        environment:
+            - "ROOTPW=pass"
+            - "ORGANIZATION=zombi"
+            - "DATADIR=/data"
+            - "CONFDIR=/conf"
+        volumes:
+            - ./data/ldap/config:/conf
+            - ./data/ldap/data:/data
diff --git a/entrypoint.sh b/entrypoint.sh
new file mode 100755
index 0000000..a1d5e32
--- /dev/null
+++ b/entrypoint.sh
@@ -0,0 +1,93 @@
+#!/bin/bash -e
+set -eo pipefail
+
+# set default values for undefined vars
+CONFDIR=${CONFDIR:-'/etc/ldap/slapd.d'}
+DATADIR=${DATADIR:-'/var/lib/ldap'}
+
+if [[ -z "$ORGANIZATION" && -z "$SUFFIX" ]] ; then
+  fail 'neither ORGANIZATION nor SUFFIX supplied as environment var'
+fi
+
+if [[ -n "$ORGANIZATION" ]] ; then
+  # if an organization was set, we can generate the RootDN from that
+  SUFFIX=${SUFFIX:-"o=${ORGANIZATION}"}
+fi
+
+function fail {
+	# write to stderr
+	echo "ERROR: $@" >&2
+	exit 1
+}
+
+function configure {
+	sed \
+		-e "s|@SUFFIX@|${SUFFIX}|g" \
+		-e "s|@PASSWORD@|${ROOTPW}|g" \
+		-e "s|@DATADIR@|${DATADIR}|g" \
+		/usr/share/slapd/fixtures/config.ldif \
+		| slapadd -F "$CONFDIR" -b "cn=config"
+
+	return $?
+}
+
+function init_fixtures {
+  mkdir -p /docker-entrypoint-initdb.d
+  # if no files exist in this directory then copy example structure
+  if ! ls /docker-entrypoint-initdb.d/* 1> /dev/null 2>&1 ; then
+    cp /usr/share/slapd/fixtures/example_structure.ldif /docker-entrypoint-initdb.d/structure.ldif
+  fi
+
+	for f in /docker-entrypoint-initdb.d/*; do
+
+		case "$f" in
+			*.sh)
+				echo "$0: running $f"; . "$f"
+				;;
+			*.ldif)
+				sed \
+					-e "s|@SUFFIX@|${SUFFIX}|g" \
+					-e "s|@PASSWORD@|${ROOTPW}|g" \
+					-e "s|@DATADIR@|${DATADIR}|g" \
+					-e "s|@ORGANIZATION@|${ORGANIZATION}|g" \
+					"$f" \
+					| slapadd -F "$CONFDIR" -b "$SUFFIX"
+				;;
+			*) echo "$0: ignoring $f" ;;
+		esac
+		echo
+	done
+
+}
+
+# Reduce maximum 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 || fail "could not set ulimits"
+
+# create dirs if they not already exists
+[ -d $CONFDIR ] || mkdir -p $CONFDIR
+[ -d $DATADIR ] || mkdir -p $DATADIR
+
+if [[ ! -d "$CONFDIR/cn=config" ]] ; then
+	echo "configuration not found, creating one for $SUFFIX .."
+	[[ -z "$ROOTPW" ]] && fail "ROOTPW not set."
+	[[ -z "$SUFFIX" ]] && fail "SUFFIX not set."
+
+	# if rootpw is not already in hashed format, hash it first
+	[[ "${ROOTPW:0:1}" == '{' ]] \
+		||ROOTPW=`slappasswd -s "$ROOTPW"`
+
+	configure || fail "could not create slapd config"
+fi
+
+if [[ ! -f "$DATADIR/data.mdb" ]] ; then
+	init_fixtures
+fi
+
+# fix file permissions
+chown -R openldap:openldap $CONFDIR $DATADIR \
+	|| fail "could not change permissions"
+
+echo "Starting slapd."
+exec /usr/sbin/slapd -F $CONFDIR -u openldap -g openldap -h 'ldapi:// ldap://' -d stats
diff --git a/fixtures/config.ldif b/fixtures/config.ldif
new file mode 100644
index 0000000..856d6de
--- /dev/null
+++ b/fixtures/config.ldif
@@ -0,0 +1,156 @@
+# this file was adapted from the default /usr/share/slapd/slapd.init.ldif
+# Global config:
+dn: cn=config
+objectClass: olcGlobal
+cn: config
+olcPidFile: /var/run/slapd/slapd.pid
+# List of arguments that were passed to the server
+olcArgsFile: /var/run/slapd/slapd.args
+# Read slapd-config(5) for possible values
+olcLogLevel: none
+# The tool-threads parameter sets the actual amount of cpu's that is used
+# for indexing.
+olcToolThreads: 1
+
+# Frontend settings
+dn: olcDatabase={-1}frontend,cn=config
+objectClass: olcDatabaseConfig
+objectClass: olcFrontendConfig
+olcDatabase: {-1}frontend
+# The maximum number of entries that is returned for a search operation
+olcSizeLimit: 500
+# Allow unlimited access to local connection from the local root user
+olcAccess: {0}to * by dn.exact=gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth manage by * break
+# Allow unauthenticated read access for schema and base DN autodiscovery
+olcAccess: {1}to dn.exact="" by * read
+olcAccess: {2}to dn.base="cn=Subschema" by * read
+
+# Config db settings
+dn: olcDatabase=config,cn=config
+objectClass: olcDatabaseConfig
+olcDatabase: config
+# Allow unlimited access to local connection from the local root user
+olcAccess: to * by dn.exact=gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth manage by * break
+olcRootDN: cn=admin,cn=config
+olcRootPW: @PASSWORD@
+
+# Load schemas
+dn: cn=schema,cn=config
+objectClass: olcSchemaConfig
+cn: schema
+
+# base schemas
+include: file:///etc/ldap/schema/core.ldif
+include: file:///etc/ldap/schema/cosine.ldif
+include: file:///etc/ldap/schema/nis.ldif
+include: file:///etc/ldap/schema/inetorgperson.ldif
+
+# additional schemas
+# include: file:///etc/ldap/schema/ppolicy.ldif
+#
+# Load module
+dn: cn=module{0},cn=config
+objectClass: olcModuleList
+cn: module{0}
+# Where the dynamically loaded modules are stored
+olcModulePath: /usr/lib/ldap
+olcModuleLoad: back_mdb
+
+# Load memberof module
+dn: cn=module{1},cn=config
+objectClass: olcModuleList
+objectClass: top
+cn: module{1}
+olcModulePath: /usr/lib/ldap
+olcModuleLoad: memberof.la
+
+# Load refint module
+dn: cn=module{2},cn=config
+objectClass: olcModuleList
+objectClass: top
+cn: module{2}
+olcModulePath: /usr/lib/ldap
+olcModuleLoad: refint.la
+
+# Set defaults for the backend
+dn: olcBackend=mdb,cn=config
+objectClass: olcBackendConfig
+olcBackend: mdb
+
+# The database definition.
+dn: olcDatabase=mdb,cn=config
+objectClass: olcDatabaseConfig
+objectClass: olcMdbConfig
+olcDatabase: mdb
+# Checkpoint the database periodically in case of system
+# failure and to speed slapd shutdown.
+olcDbCheckpoint: 512 30
+olcDbMaxSize: 1073741824
+# Save the time that the entry gets modified, for database #1
+olcLastMod: TRUE
+# The base of your directory in database #1
+olcSuffix: @SUFFIX@
+# Where the database file are physically stored for database #1
+olcDbDirectory: @DATADIR@
+# olcRootDN directive for specifying a superuser on the database. This
+# is needed for syncrepl.
+olcRootDN: cn=admin,@SUFFIX@
+olcRootPW: @PASSWORD@
+# Indexing options for database #1
+olcDbIndex: objectClass eq
+olcDbIndex: cn,uid eq
+olcDbIndex: uidNumber,gidNumber eq
+olcDbIndex: member,memberUid eq
+# additional attributes
+olcDbIndex: mail,associatedDomain eq
+olcDbIndex: memberOf eq
+# The userPassword by default can be changed by the entry owning it if
+# they are authenticated. Others should not be able to see it, except
+# the admin entry above.
+olcAccess: to attrs=userPassword
+  by self write
+  by anonymous auth
+  by * none
+# Allow update of authenticated user's shadowLastChange attribute.
+# Updating it on password change is implemented at least by libpam-ldap,
+# libpam-ldapd, and the slapo-smbk5pwd overlay.
+olcAccess: to attrs=shadowLastChange
+  by self write
+  by * read
+# ou=People users can see ou=People node
+olcAccess: to dn.exact="ou=People,@SUFFIX@"
+  by dn.subtree="ou=People,@SUFFIX@" read
+  by * break
+# User can only access their own profile
+# Services can read all User nodes
+olcAccess: to dn.subtree="ou=People,@SUFFIX@"
+  by self read
+  by dn.subtree="ou=Services,ou=People,@SUFFIX@" read
+  by * none
+# allow to read domain attributes for service accounts
+olcAccess: to dn.subtree="ou=Domains,@SUFFIX@"
+  by dn.subtree="ou=Services,ou=People,@SUFFIX@" read
+# The admin dn (olcRootDN) bypasses ACLs and so has total access,
+# everyone logged in can read everything.
+olcAccess: to *
+  by anonymous none
+  by * read
+
+# memberof overlay manages the memberOf attribute based on referential
+# groups
+dn: olcOverlay={0}memberof,olcDatabase={1}mdb,cn=config
+objectClass: olcConfig
+objectClass: olcMemberOf
+objectClass: olcOverlayConfig
+objectClass: top
+olcOverlay: memberof
+
+# refint overlay preserves referential integrety, by watching for renames of
+# referenced fields
+dn: olcOverlay={1}refint,olcDatabase={1}mdb,cn=config
+objectClass: olcConfig
+objectClass: olcOverlayConfig
+objectClass: olcRefintConfig
+objectClass: top
+olcOverlay: {1}refint
+olcRefintAttribute: memberof member manager owner
diff --git a/fixtures/example_structure.ldif b/fixtures/example_structure.ldif
new file mode 100644
index 0000000..f33f3e6
--- /dev/null
+++ b/fixtures/example_structure.ldif
@@ -0,0 +1,49 @@
+# Create RootDN first:
+dn: @SUFFIX@
+objectClass: organization
+objectClass: top
+o: @ORGANIZATION@
+
+dn: ou=People,@SUFFIX@
+ou: people
+objectClass: organizationalUnit
+objectClass: top
+description: People associated with @ORGANIZATION@
+
+dn: ou=Services,ou=People,@SUFFIX@
+ou: services
+objectClass: organizationalUnit
+objectClass: top
+description: Accounts for services of @ORGANIZATION@
+
+dn: ou=Groups,@SUFFIX@
+ou: groups
+objectClass: organizationalUnit
+objectClass: top
+description: User groups within @ORGANIZATION@
+
+dn: ou=System,ou=Groups,@SUFFIX@
+ou: system
+objectClass: organizationalUnit
+objectClass: top
+description: Posix groups within @ORGANIZATION@
+
+dn: cn=user,ou=System,ou=Groups,@SUFFIX@
+cn: user
+objectClass: posixGroup
+objectClass: top
+gidNumber: 30000
+description: Default system user group
+
+dn: ou=Domains,@SUFFIX@
+ou: domains
+objectClass: organizationalUnit
+objectClass: top
+description: Domains controlled by @ORGANIZATION@
+
+dn: ou=Policies,@SUFFIX@
+ou: policies
+objectClass: organizationalUnit
+objectClass: top
+description: Password policies for @ORGANIZATION@
+