lib/fog/compute/examples/getting_started.md
# Getting started: the compute service
You'll need a DigitalOcean account and an API token to use this provider.
Get one from https://cloud.digitalocean.com/settings/tokens/new
Write down the Access Token.
## Connecting, retrieving and managing server objects
Before we start, I guess it will be useful to the reader to know
that Fog servers are 'droplets' in DigitalOcean's parlance.
'Server' is the Fog way to name VMs, and we have
respected that in the DigitalOcean's Fog provider.
First, create a connection to the host:
```ruby
require 'fog/digitalocean'
docean = Fog::Compute.new({
:provider => 'DigitalOcean',
:digitalocean_token => 'poiuweoruwoeiuroiwuer', # your Access Token here
})
```
## SSH Key Management
Access to DigitalOcean servers can be managed with SSH keys. These can be assigned to servers at creation time so you can access them without having to use a password.
Creating a key:
```ruby
docean.ssh_keys.create(
:name => 'Default SSH Key',
:ssh_pub_key => File.read('~/.ssh/id_rsa.pub'))
)
```
Listing all keys:
```ruby
docean.ssh_keys.each do | key |
puts key.name
puts key.public_key
puts key.id
end
```
Destroying a key:
```ruby
docean.ssh_keys.destroy(:id => '27100')
```
## Listing servers
Listing servers and attributes:
```ruby
docean.servers.each do |server|
# remember, servers are droplets
puts server.id
puts server.name
puts server.status
puts (server.image['slug'] || server.image['name']) # slug is only for public images, private images use name
puts server.size['slug']
puts server.region['slug']
end
```
## Server creation and life-cycle management
Creating a new server (droplet):
```ruby
server = docean.servers.create :name => 'foobar',
# use the last image listed
:image => docean.images.last.id,
# use the first flavor (aka size) listed
:size => docean.flavors.first.slug,
# use the first region listed
:region => docean.regions.first.slug
```
The server is automatically started after that.
We didn't pay attention when choosing the flavor, image and region used
but you can easily list them too, and then decide:
```ruby
docean.images.each do |image|
puts image.id
puts image.name
puts image.distribution
end
docean.flavors.each do |flavor|
puts flavor.slug
end
docean.regions.each do |region|
puts region.slug
end
```
Rebooting a server:
```ruby
server = docean.servers.first
server.reboot
```
Power cycle a server:
```ruby
server.power_cycle
```
Destroying the server:
```ruby
server.destroy
```