Setup Digitial Ocean droplets for class

do_snapcraft_notes.md

Sign up for digital ocean

Install doctl on your machine (useful for managing droplets)

snap install doctl

Setup doctl

Get API key

https://cloud.digitalocean.com/account/api/tokens

Auth doctl

doctl auth init

Test doctl

doctl compute droplet list

Add your SSH key to your account

https://cloud.digitalocean.com/account/security

• Create a droplet

• Ubuntu 16.04
• 2GB / 1 CPU
• London region
• Add your ssh
• hostname snapcraftiobase

• Note IP of host

Setup base image

SSH as root to the machine

ssh root@IP

Create a user

root@snapcraftiobase:~# adduser snapcraft
Adding user `snapcraft' ...
Adding new group `snapcraft' (1000) ...
Adding new user `snapcraft' (1000) with group `snapcraft' ...
Creating home directory `/home/snapcraft' ...
Copying files from `/etc/skel' ...
Enter new UNIX password: 
Retype new UNIX password: 
passwd: password updated successfully
Changing the user information for snapcraft
Enter the new value, or press ENTER for the default
        Full Name []: 
        Room Number []: 
        Work Phone []: 
        Home Phone []: 
        Other []: 
Is the information correct? [Y/n] y

Note the password you use

Give the user sudo access

usermod -aG sudo snapcraft

Install software

Delegates use ssh to connect to the server apt install openssh-server

snap install snapcraft --classic

Optionally install multipass, if you don't, snapcraft will prompt to install it on first time you run snap install multipass --classic --beta

Allow ssh

nano /etc/ssh/sshd_config

Set the following: PasswordAuthentication yes

systemctl restart ssh

Snapshot machine

Back in the digital ocean web UI, take a snapshot of the VM

Spin up multiple VMs based on the snapshot

List them doctl compute image list Grab the ID number from the output (first column)

Get ssh-key fingerprint

doctl compute ssh-key list Grab FingerPrint from third column

Spin up one machine

Plug in IMAGE and SSHKEY from above doctl compute droplet create ubuntuserver01 --size 2gb --image $IMAGE --region lon1 --ssh-keys $SSHKEY

Spin up multiple..

for f in {01..10}; 
do
  doctl compute droplet create ubuntuserver"$f" --size 2gb --image $IMAGE --region lon1 --ssh-keys $SSHKEY
done

List to get IP addresses

doctl compute droplet list