Begin writing copy to sd section.
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144
readme.org
144
readme.org
@ -34,6 +34,7 @@ raspberry pis.
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documentation to support a control plane of more than one machine.
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** Boot media
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This guide requires each Raspberry Pi to have a removable SD card or
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@ -87,86 +88,87 @@ raspberry pis.
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Checking file is now present
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-rw-rw-rw- 1 james james 60299545 Aug 12 08:35 raspberrypi-ua-netinst-v2.4.0.zip
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Extracting the zip file
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drwxrwxrwx 1 james james 4096 Dec 24 19:35 installer
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-rw-rw-rw- 1 james james 1351 Dec 24 18:02 installer-config.txt
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#+end_example
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** Apply custom configuration
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Our next step after downloading the
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Our next step after downloading the latest release is to apply our own
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installation configuration using a simple txt file.
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There is great documentation online howing what configuration options are
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available [[https://github.com/malignus/raspberrypi-ua-netinst/blob/master/doc/INSTALL_CUSTOM.md][here]].
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For our purposes we just over-write the file downloaded and extracted in
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the previous step with one we have prepared earlier :)
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#+NAME: Overwrite installer configuration file
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#+begin_src shell :results output code verbatim replace :wrap example
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echo Display wordcount of original file for comparison
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wc installer/raspberrypi-ua-netinst/config/installer-config.txt
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echo Overwriting /installer/raspberrypi-ua-netinst/config/installer-config.txt
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cp installer-config.txt /installer/raspberrypi-ua-netinst/config/
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echo Display wordcount of file after copy to validate update
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wc installer/raspberrypi-ua-netinst/config/installer-config.txt
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#+end_src
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#+RESULTS: Overwrite installer configuration file
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#+begin_example
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Display wordcount of original file for comparison
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33 64 1351 installer/raspberrypi-ua-netinst/config/installer-config.txt
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Overwriting /installer/raspberrypi-ua-netinst/config/installer-config.txt
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Display wordcount of file after copy to validate update
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33 64 1351 installer/raspberrypi-ua-netinst/config/installer-config.txt
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#+end_example
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* Step 2 - Copy the install media to sd card
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Our next step is to copy the contents of the ~installer/~ folder
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to a *FAT32* formatted SD Card.
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Unfortunately this is currently a windows step as my dev environment
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is a Windows 10 laptop with Debian via Windows Subsystem for Linux
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which does not support ~lsblk~ or other disk management commands.
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Our first step is to insert the SD Card and ensure it is formatted
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correctly as ~FAT32~. To do that we need to know the number of the
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disk we want to format, we can find that via powershell.
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#+NAME: Get disks via windows powershell
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#+begin_src shell :results output code verbatim replace :wrap example
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echo Retrieving disk list via powershell
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powershell.exe -nologo
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get-disk | select Number, FriendlyName, Size
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exit
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#+end_src
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#+RESULTS: Get disks via windows powershell
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#+begin_example
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Retrieving disk list via powershell
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PS get-disk | select Number, FriendlyName, Size
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Number FriendlyName Size
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------ ------------ ----
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1 Realtek PCIE Card Reader 31104958464
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0 SAMSUNG MZVLB256HAHQ-000H1 256060514304
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#+end_example
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* Step 2 - Write the image file to removable media
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Once we know the number of the disk we want to format we can proceed.
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In the example above I have a 32GB SD Card which shows as number ~1~.
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Our next step is to write the downloaded image file to our removable
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media. This step needs to be repeated for each raspberry pi in the
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cluster.
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Our next step is to again user powershell, this time to format the sd.
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*Note:* As my development environment is based on [[https://docs.microsoft.com/en-us/windows/wsl/about][wsl]] I need to use
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a third party tool to write the image. If you are on a standard linux
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distribution you can use the ~dd~ utility to write the image.
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The image writing utility I use is [[https://www.balena.io/etcher/][balena etcher]]. After downloading
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the latest version:
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- Insert your removable media.
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- Select the image file you downloaded earlier.
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- Select your removable media and start writing the image.
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* Step 3 - Enable ssh at startup
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As our cluster will be headless, i.e. have no screen keyboard or mouse
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plugged in we need to ensure ssh is configured from boot so that we can
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remotely connect.
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To do this we just need to add an empty file named ~ssh~ to our newly
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created sd card
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#+NAME: Mount newly formatted sd card
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#+BEGIN_SRC shell
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sudo mkdir /media/sdcard
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sudo mount /dev/[SDCARD] /media/sdcard -o umask=000
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#+END_SRC
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#+NAME: Create the blank ssh file in the boot directory
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#+BEGIN_SRC shell
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sudo touch /media/sdcard/ssh
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#+END_SRC
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* Step 4 - Enable wifi at startup
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For this guide we are running our cluser wirelessly. To ensure we can
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access our pi's once they boot we need to ensure they boot with a wifi
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configuration that will connect to our desired network.
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To achieve this we need to set a configuration for the [[https://en.wikipedia.org/wiki/Wpa_supplicant][wpa_supplicant]]
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application that our raspberry pi's use for managing wireless.
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For security reasons I don't store wireless access point details here.
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Instead they are retrieved at runtime of the code block using the
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[[https://bitwarden.com/][bitwarden]] command line utility.
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#+NAME: Write the wireless configuration file
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#+BEGIN_SRC shell
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export WIRELESS_SSID=`bw get username wifi`
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export WIRELESS_PASS=`bw get password wifi`
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cat > /media/sdcard/wpa_supplicant.conf << EOF
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country=nz
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update_config=1
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ctrl_interface=/var/run/wpa_supplicant
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network={
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scan_ssid=1
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ssid=$WIRELESS_SSID
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psk=$WIRELESS_PASS
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}
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EOF
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#+END_SRC
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After writing the file we will use ~cat~ to verify the details.
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If all details are correct you can unmount and remove the media.
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#+NAME: Format the sd card
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#+begin_src shell :results output code verbatim replace
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#+end_src
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