Class: Central::Machine::DigitalOcean::NodeProvisioner

Inherits:
Object
  • Object
show all
Includes:
RandomName
Defined in:
lib/central/machine/digital_ocean/node_provisioner.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(api_client, token) ⇒ NodeProvisioner

Returns a new instance of NodeProvisioner.

Parameters:

  • api_client (Central::Client) —

    Central api client

  • token (String) —

    Digital Ocean token



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# File 'lib/central/machine/digital_ocean/node_provisioner.rb', line 16

def initialize(api_client, token)
  @api_client = api_client
  @client = DropletKit::Client.new(access_token: token)
end

Instance Attribute Details

#api_client ⇒ Object (readonly)

Returns the value of attribute api_client.



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# File 'lib/central/machine/digital_ocean/node_provisioner.rb', line 12

def api_client
  @api_client
end

#client ⇒ Object (readonly)

Returns the value of attribute client.



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# File 'lib/central/machine/digital_ocean/node_provisioner.rb', line 12

def client
  @client
end

Instance Method Details

#droplet_exists_in_stack?(stack, droplet) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/central/machine/digital_ocean/node_provisioner.rb', line 66

def droplet_exists_in_stack?(stack, droplet)
  api_client.get("stacks/#{stack}/nodes")['nodes'].find { |n| n['name'] == droplet.name }
end

#erb(template, vars) ⇒ Object 



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# File 'lib/central/machine/digital_ocean/node_provisioner.rb', line 70

def erb(template, vars)
  ERB.new(template).result(OpenStruct.new(vars).instance_eval { binding })
end

#generate_name ⇒ Object 



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# File 'lib/central/machine/digital_ocean/node_provisioner.rb', line 58

def generate_name
  "#{super}-#{rand(1..99)}"
end

#run!(opts) ⇒ Object 



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# File 'lib/central/machine/digital_ocean/node_provisioner.rb', line 21

def run!(opts)
  abort('Invalid ssh key') unless File.exist?(File.expand_path(opts[:ssh_key]))

  ssh_key = ssh_key(File.read(File.expand_path(opts[:ssh_key])).strip)
  abort('Ssh key does not exist in Digital Ocean') unless ssh_key

  userdata_vars = {
    version: opts[:version],
    master_uri: opts[:master_uri],
    stack_token: opts[:stack_token]
  }

  droplet = DropletKit::Droplet.new(
    name: opts[:name] || generate_name,
    region: opts[:region],
    image: 'coreos-stable',
    size: opts[:size],
    private_networking: true,
    user_data: user_data(userdata_vars),
    ssh_keys: [ssh_key.id]
  )
  created = client.droplets.create(droplet)
  ShellSpinner "Creating DigitalOcean droplet #{droplet.name.colorize(:cyan)} " do
    sleep 5 until client.droplets.find(id: created.id).status == 'active'
  end
  node = nil
  ShellSpinner "Waiting for node #{droplet.name.colorize(:cyan)} join to stack #{opts[:stack].colorize(:cyan)} " do
    sleep 2 until node = droplet_exists_in_stack?(opts[:stack], droplet)
  end
  set_labels(node, ["region=#{opts[:region]}"])
end

#set_labels(node, labels) ⇒ Object 



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# File 'lib/central/machine/digital_ocean/node_provisioner.rb', line 74

def set_labels(node, labels)
  data = { labels: labels }
  api_client.put("nodes/#{node['id']}", data, {}, 'Central-Stack-Token' => node['stack']['token'])
end

#ssh_key(public_key) ⇒ Object 



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# File 'lib/central/machine/digital_ocean/node_provisioner.rb', line 62

def ssh_key(public_key)
  ssh_key = client.ssh_keys.all.find { |key| key.public_key == public_key }
end

#user_data(vars) ⇒ Object 



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# File 'lib/central/machine/digital_ocean/node_provisioner.rb', line 53

def user_data(vars)
  cloudinit_template = File.join(__dir__, '/cloudinit.yml')
  erb(File.read(cloudinit_template), vars)
end