More WIP

README.md

@@ -6,7 +6,7 @@ This guide will walk you through how to set up smokeping on a raspberry pi using
 
 ### Download Ubuntu Image
 
-In our example we're using a pi 3, so we'll go and grab their Ubuntu install image from [here](https://ubuntu.com/download/raspberry-pi).
+In our example we're using a pi 3, so we'll go and grab their Ubuntu install image from [here](https://ubuntu.com/download/raspberry-pi). When choosing the image, I recommend using 64 bit.
 
 ### Install Etcher
 
@@ -65,17 +65,100 @@ chpasswd:
 hostname: smokepi
 ```
 
-Optionally you could change the default password from _ubuntu_ to _password1_ by changing it to this instead:
+Optionally you could change the default user from _ubuntu_ to _adam_ and the default password from _ubuntu_ to _password1_ by changing it to this instead:
 
 ```
 chpasswd:
   expire: true
   list:
-  - ubuntu:password1
+  - adam:password1
 
 hostname: smokepi
 ```
 
+### First boot
+
+Once the pi has booted, we must wait for it to stop installing updates before we can continue. To check this, run the following command:
+
+```bash
+while true; do date; ps aux | grep unattended; sleep 5; done
+```
+
+This will start a never-ending command that will print all processes matching "unattended" back to the console. When updates are complete, it should simply return two lines that match.
+
+### Install Docker
+
+This section was taken from docker's own documentation available [here](https://docs.docker.com/engine/install/ubuntu/).
+
+#### Install pre-requisites
+
+First we must install the packages that Ubuntu needs in order to configure the docker repository:
+
+```bash
+sudo apt-get install \
+    apt-transport-https \
+    ca-certificates \
+    curl \
+    gnupg-agent \
+    software-properties-common
+```
+
+#### Add Docker GPG key
+
+Next we must install Docker's GPG key so that your pi trusts the docker packages it is about to install:
+
+```bash
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
+```
+
+#### Add Docker repositories
+
+Now we will install the docker packages. If you installed 64 bit Ubuntu (recommended), run:
+```bash
+sudo add-apt-repository \
+   "deb [arch=arm64] https://download.docker.com/linux/ubuntu \
+   $(lsb_release -cs) \
+   stable"
+```
+
+If you installed 32 bit Ubuntu, run:
+```bash
+sudo add-apt-repository \
+   "deb [arch=armhf] https://download.docker.com/linux/ubuntu \
+   $(lsb_release -cs) \
+   stable"
+```
+
+#### Install Docker packages
+
+Now we must install docker itself with the following commands:
+
+```bash
+sudo apt update
+sudo apt install docker-ce docker-ce-cli containerd.io
+```
+
+#### Add ubuntu user to docker groups
+
+Now we must add the _ubuntu_ user to the _docker_ group. Doing this ensures that you can run the `docker` command without prefixing it with `sudo`:
+
+```bash
+usermod -aG docker ubuntu
+```
+
+Once this is done you will need to disconnect and reconnect your ssh connection in order for your user's group membership to be picked up.
+
+_If you changed the username in the [user-data](#user-data), change `ubuntu` for whichever username you chose._
+
+### Test that docker is working
+
+Finally you should check that docker is up and running by running `docker ps`. Below is what the output should look like when running the command:
+
+```bash
+ubuntu@smokepi:~/ $ docker ps
+CONTAINER ID        IMAGE                   COMMAND                  CREATED             STATUS              PORTS                  NAMES
+```
+
 #### Clear graphs
 ```
 sudo rm -rf /opt/smokeping/data/*