Cool Solution - Installation of Microsoft SCCM

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Note: Cool Solutions are articles documenting additional functionality based on Univention products. Not all of the shown steps in the article are covered by Univention Support. For questions about your support coverage contact your contact person at Univention before you want to implement one of the shown steps.

Also regard the legal notes at Terms of Service.

Important Note: The article goes through the installation of software that utilizes features of Active Directory (AD) subsituting the AD functionality using UCS with Samba 4.

Please note that Univention does not provide support for the software, nor does Univention offer the described software or parts of it, e.g. the Active Directory schema. Licenses for the software described have to be obtained through the sales channels offered by the software vendor. Also regard the legal notes at Terms of Service.

Please acknowledge that "cool solution" tutorials are created with best intentions. It is provided as is, without any warranty and might not work in all given situations.

Note: This article is not yet reviewed.


This Article describes the installation of the Microsoft System Center Configuration Manager Version 1702 (further referred to as "SCCM") on a Windows 2016 Server with a Microsoft SQL Server 2016 SP1 using the Univention Corporate Server Version 4 with Samba 4. The important difference from an installation using an Active Directory is the application of the SCCM schema extension to the Samba 4 schema.

The installation of the SCCM is not different from the installation done in an Active Directory domain.

Alternatives to SCCM

There are different OS and software deployment solutions certified for UCS, the first one was OPSI from UIB. More Informations can be found at http://www.univention.com/products/ucs/certified-solutions/

System Status

Before starting the installation of the SCCM, ensure that your Windows Server has joined your Samba 4 Domain. Also ensure, that both systems are up to date.

Schema extension

Modifying the LDIF

To extend the schema of your Samba 4 installation, you have to edit the ldif file provided by Microsoft. The file named

ConfigMgr_ad_schema.ldf

can be located in your SCCM installation DVD / extracted installation folder under

SMSSETUP\BIN\X64

First, the file has to be converted to Unix-style line terminators:

sed -i s/\\x0D$// ConfigMgr_ad_schema.ldf

Then, the file has to be adjusted in several ways. First, you have to remove the schema update symbols, including the blank lines above them, from every add and modify command:

dn:
changetype: modify
replace: schemaupdatenow
schemaupdatenow: 1

Please note, that the dash "-" at the end of every command has to remain.

Afterwards, in all lines starting with "dn: ", the trailing

DC=x

has to be replaced with the Samba/AD LDAP base fo your UCS domain. To determine the correct LDAP base, issue the following command on your Domaincontroller Master:

ucr get samba4/ldap/base

After applying these changes, the resulting ldif has to be split into LDAP attribute extensions and LDAP objectclass extensions. The attribute extensions have to be added first, before the objectclass extensions can be added. The attribute extensions can be found below the comment:

# =========================================================================
#                       SMS Schema Attributes - Additions
# =========================================================================

and can be distinguished by the objectClass:

objectClass: attributeSchema

Likewise, the objectclass extensions can be found below the comment:

# =========================================================================
#                       SMS Schema Classes - Additions
# =========================================================================

and can be distinguished by the objectClass:

objectClass: classSchema

We assume that the attribute definitions are saved in "attributeSchema.ldf" and the modifications are saved in "classSchema.ldf".

Applying the LDIF

The schema modifications can be applied on any Samba DC. Therefore schema extensions have to been enabled by setting the following variable: To apply the schema extension, you first have to temporarily enable the following UCR variable to allow schema updates on your Samba Domain:

ucr set samba4/schema/update/allowed=yes
systemctl restart samba.service

First, the add statements need to be applied. As there are interdependencies between the objects you will get error messages on applying the add statements. It is sufficient to apply the adds twice each to include all changes. The following commands can be used to apply the resulting files: Use the following commands to apply the schemas. Note that you will have to execute these commands multiple times, as there are interdependencies between the objects.

ldbmodify -H ldapi:///var/lib/samba/private/ldap_priv/ldapi attributeSchema.ldf
ldbmodify -H ldapi:///var/lib/samba/private/ldap_priv/ldapi classSchema.ldf

Afterwards, schema updates should be disabled again to prevent the inclusion of untested extensions:

ucr set samba4/schema/update/allowed=no
systemctl restart samba.service

SCCM Users

Two system users should be created using the UMC for this installation. Both need to be Samba, Posix and Kerberos accounts. One is for the SCCM client distribution, not covered here, and one for the SQL server. The Passwords should be kept complex. You do not need to remember the one for the SQL Server user. The one for the SCCM client distribution needs to be entered once during the Configuration of SCCM.

Creating the System Management Container

For the following, you will need to connect to the Domain using the Remote Server Administration Tool "ADSI Edit". Use the following link for informations on how to install it: Remote Server Administration Tools (RSAT) for Windows operating systems

After opening ADSI Edit and connecting to your Domain Controller, move into the container

CN=System

and select "new"->"Object" from the context menu. Select

Container

as the object type and name it

System Management

then confirm the dialog. Select the new container and open its properties page from the context menu. Select the securities tab and add your SCCM server as a security principle. Grant full control to the server and click apply. Next press the "Advanced" button. Again select your SCCM server and press "Edit…". In the new menu select for "Apply to" the entry

This object and all descendant objects

confirm all dialogs and close the ADSI Editor.

This allows the SCCM Host to distribute the information regarding the Distribution Points.

Client & Software Distribution Groups

To distribute Software, the SCCM Host needs to be added to the local Administrators Group. In addition, the SCCM Client Distribution user needs to be in the local Administrators Group, if the Push Installation is to be used.

Open the "Active Directory Users and Computers" Tool and navigate to the container

CN=Builtin

Here select "Administrators" and add both the SCCM Host and the SCCM Client Distribution user in the Members Tab.

Alternatively you can add the User and the SCCM Host to the "Domain Admins" group in the Univention Directory Manager, but while being more comfortable this grants many more rights than needed.

Windows Installation

From here on the installation of SCCM is equal to the installation in a pure Microsoft domain.

Note that you have to choose Windows Authentication and set your created SQL user for all non system services during the Database Engine Configuration of your Microsoft SQL Server.

We recommend following the official Microsoft Documentation for installing a System Center Configuration Manager site

Sources

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