Raspberry-Pi-4

• To reboot Raspberry Pi:

  • sudo reboot

• To find the operating temperature:

  • sudo vcgencmd measure_temp

Raspberry-Pi-4 with NextcloudPi

• Install the Raspberry Pi Imager using Synaptic.
• Get the latest image from https://nextcloudpi.com/
• Write the image to a microSD card - include Wi-Fi and SSH settings.
• Connect using a cable, using ssh pi@nextcloudpi.local and the SSH password set when creating the microSD card. Use ssh-keygen -f "/home/paul/.ssh/known_hosts" -R "nextcloudpi.local" to remove if connected before. Use ssh xxx.xxx.x.xxx if unknown.
• To set the fan temperature, sudo raspi-config, select Performance Options and P3 Fan. Set the GPIO to 14 and the temperature to 60. (https://www.raspberrypi.com/products/raspberry-pi-4-case-fan/)
• To set the WiFi, sudo raspi-config, select System Options and Wireless LAN
• Save and the config and the Raspberry Pi will reboot.
• Enter the IP in the address bar in Fx.
• You will see two sets of credentials:
  • The first is to access the admin console at https://nextcloudpi.local:4443
  • The second is as a user at https://nextcloudpi.local
• Follow the first run wizard to set USB storage and set data to USB.
• Login as a user and set a separate account for general day-to-day use.
• See https://opensource.com/article/23/3/nextcloudpi-nextcloud-raspberry-pi, https://docs.nextcloud.com/server/27/user_manual/en/index.html, https://nextcloud.com/contribute/
• Turn off LED - https://raspberrytips.com/disable-leds-on-raspberry-pi/
• To measured the temperature - /usr/bin/vcgencmd measure_temp
• To turn off HDMI - https://github.com/raspberrypi/firmware/blob/master/boot/overlays/README & https://chaos.social/@dividuum/113494506345793623 & https://passthehash.co.uk/posts/Headless-Rasperry-Pi-Setup/

sudo nano /boot/config.txt

Overlays

dtoverlay=gpio-fan,gpiopin=14,temp=60000 dtoverlay=disable-bt dtparam=pwr_led_activelow=off dtparam=act_led_trigger=none dtparam=act_led_activelow=off dtparam=eth_led0=4 dtparam=eth_led1=4 dtoverlay=vc4-kms-v3d,nohdmi

Raspberry-Pi-4 with NAS

• https://www.raspberrypi.com/tutorials/nas-box-raspberry-pi-tutorial/

Raspberry-Pi-4 with k8s

• Install the Raspberry Pi Imager using Synaptic.

• Write the image to a microSD card - using a 64-bit Raspberry Pi OS lite image and include Wi-Fi and SSH settings.

• Connect using a cable, using ssh pi@raspberrypi.local and the SSH password set when creating the microSD card. Use ssh-keygen -f "/home/paul/.ssh/known_hosts" -R "raspberrypi.local" to remove if connected before.

• sudo apt update and sudo apt full-upgrade to check for updates.

• To set the fan temperature, sudo raspi-config, select performance and P3 Fan. Set the GPIO to 14 and the temperature to 80. (https://www.raspberrypi.com/products/raspberry-pi-4-case-fan/)

• To set the Wi-Fi: nmcli dev wifi list to list networks sudo nmcli --ask dev wifi connect <example_ssid> to connect to a SSID

• To add a USB stick and automount it:

  sudo blkid to get the UUID.

  sudo mkdir /media/myUSB to create a mount point.

  sudo nano /etc/fstab and add the line UUID=[UUID of USB drive] /media/myUSB vfat uid=pi,gid=pi 0 2

  Save and reboot Raspberry PI. Running df -H should show the USB stick automounted.

• To install Microk8s:

  • sudo apt update and sudo apt install snapd
  • sudo nano /boot/firmware/cmdline.txt and set the text to cgroup_enable=memory cgroup_memory=1 net.ifnames=0 dwc_otg.lpm_enable=0 console=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait
  • sudo snap install microk8s --classic
  • grep mem /proc/cgroups | awk '{ print $4 }' should return 1
  • sudo usermod -a -G microk8s $USER
  • sudo chown -f -R $USER ~/.kube
  • sudo reboot
  • microk8s enable dns

• To install Docker:

  • curl -sSL get.docker.com | sh && sudo usermod pi -aG docker

• To install Kubernetes dashboard:

  • sudo snap install kubectl --classic
  • microk8s enable dashboard
  • On laptop ssh -L 8001:localhost:8001 pi@raspberrypi.local
  • On Raspberry Pi microk8s.kubectl proxy --accept-hosts=.\* --address=0.0.0.0
  • On laptop http://localhost:8001/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/#/login
  • On Raspberry Pi token=$(microk8s.kubectl -n kube-system get secret | grep default-token | cut -d " " -f1) microk8s.kubectl -n kube-system describe secret $token
  • Copy and paste the token from the terminal into the prompt in Fx.

• To update Kubernetes dashboard:

  • See https://github.com/kubernetes/dashboard/releases and follow instructions there. Prefix the installation command with microk8s

• https://www.raspberrypi.com/documentation/computers/configuration.html#set-up-a-headless-raspberry-pi

• https://peppe8o.com/automount-usb-storage-with-raspberry-pi-os-lite-fstab-and-autofs/

• https://zenlot.medium.com/raspberry-pi-4-and-micro8ks-setup-4bc5ee6eb7d7

• https://gist.github.com/felipecruz91/e2414cd1ba76d71739cf0fc8302109da

• https://www.cyberciti.biz/faq/linux-find-out-raspberry-pi-gpu-and-arm-cpu-temperature-command/

• https://github.com/kubernetes/dashboard

• https://zenlot.medium.com/raspberry-pi-4-and-micro8ks-setup-4bc5ee6eb7d7

• https://peppe8o.com/automount-usb-storage-with-raspberry-pi-os-lite-fstab-and-autofs/

• https://stackoverflow.com/questions/66486218/the-docker-official-image-hello-world-keep-reporting-back-off-restarting-failed

• https://sysdig.com/learn-cloud-native/kubernetes-101/what-is-microk8s/