diff --git a/Makefile b/Makefile
index 99d7f19..4ef710e 100644
--- a/Makefile
+++ b/Makefile
@@ -4,6 +4,8 @@ DEP := \
 	config/headfoot.tex	\
 	config/sourcelst.tex	\
 	content.tex		\
+	gitlab-runner.tex	\
+	title.tex		\
 	Makefile
 
 all: $(MAIN)
diff --git a/content.tex b/content.tex
index c639744..d4e2413 100644
--- a/content.tex
+++ b/content.tex
@@ -1,241 +1,66 @@
-\section{Installation}
-\subsection{SD card preparation}
-\subsubsection{Partitions}
-Format the SD card with two new partitions:
-\lstsetbash
-\begin{lstlisting}
-fdisk /dev/mmcblk0
-\end{lstlisting}
-\begin{enumerate}
-\item Type \textbf{o} to erase all former partitions
-\item Type \textbf{p} to list all existing partitions
-\item Type \textbf{n}, then \textbf{p} to create the boot partition. Press
-\textbf{RETURN} to accept the first sector, then \textbf{+100M} for the
-last sector
-\item Type \textbf{t}, then \textbf{c} to set the partition type to FAT32
-\item Type \textbf{n}, then \textbf{p} to create the root partition. Press
-\textbf{RETURN} to accept the first sector, then \textbf{RETURN} for the
-last sector
-\item Type \textbf{w} to write the new partition table
-\end{enumerate}
-
-\subsubsection{File systems}
-Create the file systems for the new partitions:
-\begin{lstlisting}
-mkfs.vfat /dev/mmcblk0p1
-mkfs.ext4 /dev/mmcblk0p2
-\end{lstlisting}
-Create mount points and mount the new partitions:
-\begin{lstlisting}
-mkdir boot
-mkdir root
-mount /dev/mmcblk0p1 boot
-mount /dev/mmcblk0p2 root
-\end{lstlisting}
-
-\subsubsection{Download and extract root file system}
-\begin{lstlisting}
-wget http://archlinuxarm.org/os/\
-ArchLinuxARM-rpi-2-latest.tar.gz
-bsdtar -xpf ArchLinuxARM-rpi-2-latest.tar.gz -C root
-sync
-mv root/boot/* boot
-\end{lstlisting}
-Enable ssh root login:
-\begin{lstlisting}
-vim root/etc/ssh/sshd\_config
-\end{lstlisting}
-Find \texttt{\#PermitRootLogin yes} and uncommend it
-\begin{lstlisting}
-PermitRootLogin yes
-\end{lstlisting}
-Unmount both partitions
-\begin{lstlisting}
-umount boot root
-\end{lstlisting}
-
-\section{Configuration}
-\subsection{User management}
-\subsubsection{Create new user}
-\begin{lstlisting}
-useradd -m -g users -G wheel -s /bin/bash tkl
-\end{lstlisting}
-\begin{tabular}{ l l }
-\texttt{-m} & create user name home directory\\
-\texttt{-g} & initial login group\\
-\texttt{-G} & list of supplementary groups - comma separated\\
-\texttt{-s} & path and file name of default login shell\\
-\end{tabular}\\
-Set password for the new user:
-\begin{lstlisting}
-passwd tkl
-\end{lstlisting}
-Enable wheel group members as sudoers:
-\begin{lstlisting}
-EDITOR=vim visudo
-\end{lstlisting}
-Uncomment:
-\begin{lstlisting}
-%wheel		ALL=(ALL) ALL
-\end{lstlisting}
-
-\subsection{Aliasing}
-\begin{lstlisting}
-cd ~
-vi .bashrc
-\end{lstlisting}
-Add:\\
-\texttt{alias vi='vim'}
-
-\subsection{Customize vim}
-Edit \texttt{.vimrc}:
-\begin{lstlisting}
-syntax on	"Syntax highlightning
-set number	"Line numbering
-\end{lstlisting}
-
-\subsection{Wifi}
-Configure wifi network:
-\begin{lstlisting}
-wifi-menu
-\end{lstlisting}
-Enable wifi network permanent:
-\begin{lstlisting}
-netctl enable wlan0-<network_name>
-\end{lstlisting}
-\subsubsection{Deactivate wifi device sleep mode}
-\begin{lstlisting}
-pacman -S iw
-echo ACTION=="add", SUBSYSTEM=="net", KERNEL=="wlan*", \
-RUN+="/usr/bin/iw dev \%k set power\_save off\" \
-> etc/udev/rules.d/70-wifi-powersave.rules
-\end{lstlisting}
-
-\subsection{Ssh key login}
+\section{Introduction}
+Gitlab-ci uses so called runners to execute the build jobs defined in the build
+job file of a repository. A runner is a seperate tool and can be installed on
+any machine. The type of connection is configurable. The intentions of these concept are:\\
 \begin{itemize}
-\item Create \texttt{.ssh/} folder in users home directory
-\item Copy public key file (i.e. \texttt{id\_rsa.pub}) into \texttt{.ssh}
-folder
-\item Authorize public key:
-\begin{lstlisting}
-cat id_rsa.pub >> authorized_keys
-\end{lstlisting}
+	\item{remove (build) environmental dependency from ci server}
+	\item{multipe runners to parallize multiple builds}
 \end{itemize}
+The Runner has to be installed on a machine with a proper environment (compiler,
+...) installed for the dedicated project it is used for. Figure \ref{fig:gitlab-runner-interaction} illustrates
+the interaction of a local workstation, the gitlab(-ci) server and the
+gitlab-ci-multi-runner.
+\begin{figure}
+	\begin{center}
+		\input{gitlab-runner.tex}
+		\caption{Gitlab-ci - runner interaction}
+		\label{fig:gitlab-runner-interaction}
+	\end{center}
+\end{figure}
 
-\subsection{Interfaces}
-\subsubsection{I2C}
-To enable i2c interface edit \texttt{/boot/config.txt}. \\
-Uncomment \texttt{\#device\_tree\_param=i2c\_arm=on}\\
-Load i2c modules while boot:
-\begin{lstlisting}
-/etc/modules-load.d/raspberry.conf
-
-i2c-dev
-i2c-bcm2708
-\end{lstlisting}
-Install package \texttt{i2c-tools}
-Test i2c bus after reboot:
-\begin{lstlisting}
-i2cdetect -y 1
-\end{lstlisting}
-Set permissions for i2c device access:
-\begin{lstlisting}
-/etc/udev/rules.d/99-i2c.rules
-
-KERNEL=="i2c-1", MODE="0777"
-\end{lstlisting}
-
-\subsubsection{SPI}
-To enable spi interface edit \texttt{/boot/config.txt}. \\
-Uncomment \texttt{\#device\_tree\_param=spi=on}
-
-\subsubsection{GPIO}
-Create an udev rule to enable others than root accessing the gpio files:
-\begin{lstlisting}
-/etc/udev/rules.d/98-gpio.rules
-
-SUBSYSTEM=="gpio*", PROGRAM="/bin/sh -c 'chown -R root:gpio\
-/sys/class/gpio; chmod -R 0777 /sys/class/gpio; chown -R \
-root:gpio /sys/devices/virtual/gpio; chmod -R 0777 \
-/sys/devices/virtual/gpio'"
-\end{lstlisting}
-
-\subsection{tools}
+\section{Installation of gitlab-ci-multi-runner}
+The Installation of the runner depends on the operating system of the host and
+is described here: \hyperlink{https://docs.gitlab.com/runner/install/}{\texttt{https://docs.gitlab.com/runner/install}}
+\section{Installation of a dedicated runner}
+\subsection{Prerequisites}
+To install a dedicated runner prerequisites has to be fullfilled:
 \begin{itemize}
-\item \texttt{fakeroot}
-\item \texttt{gcc}
-\item \texttt{git}
-\item \texttt{make}
-\item \texttt{patch}
-\item \texttt{python2, python2-pip}
-\item \texttt{wget}
+	\item{Url of gitlab ci coordinator}
+	\item{Registation token of that server}
+	\item{Tags - if the build job defines tags to identify runners}
 \end{itemize}
-\subsection{Hostname}
+These two informations can be gathered at the runners section of the project's
+gitlab repository the runner is installed for. That section is accessible using:\texttt{<gitlab-url>/<project-path>/runners}\\
+\textbf{Example:}\\
+\texttt{https://novgit05.novero.com/agricola/agricola/runners}
+\subsection{Register}
+Open a shell an type: \texttt{gitlab-ci-multi-runner register}. An interactive
+shell opens and requests some inputs (see prequisites).
+\lstsetdefault
 \begin{lstlisting}
-echo "hostname" > /etc/hostname
+user@dabbld01:~$ sudo gitlab-ci-multi-runner register
+Running in system-mode.
+
+Please enter the gitlab-ci coordinator URL
+(e.g. https://gitlab.com/):
+https://novgit05.novero.com/ci
+Please enter the gitlab-ci token for this runner:
+<secret-token>
+Please enter the gitlab-ci description for this runner:
+[dabbld01]:
+my-runner
+Please enter the gitlab-ci tags for this runner (comma
+separated):
+
+Please enter the executor: shell, docker+machine,
+docker-ssh+machine, kubernetes, docker, docker-ssh,
+parallels, ssh, virtualbox:
+shell
+Runner registered successfully. Feel free to start it,
+but if it's running already the config should be
+automatically reloaded!
 \end{lstlisting}
 
-\section{Applications}
-\subsection{I2C-OLED}
-\subsubsection{Oled Test application}
-Clone test application:
-\begin{lstlisting}
-git clone git@dabgit01.internal.novero.com:raspberry/\
-oledpi.git
-\end{lstlisting}
-\subsubsection{Install driver}
-Clone oled driver:
-\begin{lstlisting}
-git clone https://github.com/rm-hull/ssd1306.git
-\end{lstlisting}
-Install it:
-\begin{lstlisting}
-python2 setup.py install
-\end{lstlisting}
-\subsubsection{Dependencies}
-\begin{itemize}
-\item \texttt{python-smbus/python2-smbus} (AUR)
-\item \texttt{i2c-tool-git} (AUR)
-\item \texttt{libjpeg-turbo}
-\item \texttt{pillow} install using pip \texttt{(pip/pip2 install pillow)}
-\end{itemize}
+\subsection{Start as service}
+Open a shell an type: \texttt{gitlab-ci-multi-runner start}
 
-\subsection{Weatherpi}
-\subsubsection{Usb weatherstation test application}
-Clone test application:
-\begin{lstlisting}
-git clone git@dabgit01.internal.novero.com:raspberry/\
-weatherpi.git
-\end{lstlisting}
-
-\subsubsection{Dependencies}
-\begin{itemize}
-\item \texttt{python2-pyusb} (AUR) (edit \texttt{PKGBUILD} and add
-\texttt{'armv7h'} to \texttt{arch})
-\item \texttt{libusb-compat}
-\end{itemize}
-
-\subsection{MQTT Broker}
-Install mosquitto (AUR)\\
-Install paho-mqtt client library:\\
-\begin{lstlisting}
-pip2 install paho-mqtt
-\end{lstlisting}
-Create config file:
-\begin{lstlisting}
-cp /etc/mosquitto.conf.example /etc/mosquitto.conf
-\end{lstlisting}
-Start mosquitto broker service:
-\begin{lstlisting}
-systemctl enable mosquitto.service
-systemctl start mosquitto.service
-\end{lstlisting}
-\subsubsection{Test}
-Subscribe to a topic:
-\begin{lstlisting}
-mosquitto_sub -t "topic/path"
-\end{lstlisting}
-Populate a message:
-\begin{lstlisting}
-mosquitto_pub -t "topic/path" -m "message payload"
-\end{lstlisting}
diff --git a/gitlab-runner.tex b/gitlab-runner.tex
new file mode 100644
index 0000000..a2d083b
--- /dev/null
+++ b/gitlab-runner.tex
@@ -0,0 +1,23 @@
+\psset{griddots=0,gridlabels=8pt,subgriddiv=5}
+\psset{xunit=10mm,yunit=10mm}
+\newcommand{\clr}{black}
+\psset{fillcolor=white}
+\psset{fillstyle=solid}
+\psset{linecolor=\clr}
+\psset{framearc=.5}
+\psset{framesep=20pt}
+\psset{arrowsize=10pt}
+\begin{pspicture}(12,6)
+%	\psgrid
+	\rput(2.5,5){\psframebox{\textcolor{\clr}{Gitlab-ci server}}}
+	\rput(2.5,1){\psframebox{\textcolor{\clr}{Local workstation}}}
+	\rput(8.5,3){\psframebox{\textcolor{\clr}{Gitlab-ci-multi-runner}}}
+	\pscurve[fillstyle=none]{->}(4.6,5)(7.2,5)(8.5,3.9)
+	\pscurve[fillstyle=none]{<-}(3,4.1)(4,3.2)(5.8,3)
+	\pscurve[fillstyle=none]{<-}(8,2.1)(7.7,1.4)(8.5,.8)(9.3,1.4)(9,2.1)
+	\psline{->}(1,1.9)(1,4.1)
+	\rput(7,5.3){build trigger}
+	\rput(.5,3){push}
+	\rput(4,2.6){build result}
+	\rput(8.5,.5){build}
+\end{pspicture}
diff --git a/title.tex b/title.tex
index 85b7671..ce1dd15 100644
--- a/title.tex
+++ b/title.tex
@@ -1,4 +1,4 @@
-\newcommand{\docname}{HowTo}
-\newcommand{\prjname}{arch linux on raspberry pi}
+\newcommand{\docname}{Gitlab-ci}
+\newcommand{\prjname}{gitlab-ci-multi-runner}
 \newcommand{\docversion}{0.1}
 \newcommand{\docauthor}{Thomas Klaehn}