Class: Nvoi::External::Cloud::Hetzner

Inherits:
Base
  • Object
show all
Defined in:
lib/nvoi/external/cloud/hetzner.rb

Overview

Hetzner provider implements the compute provider interface for Hetzner Cloud

Constant Summary collapse

BASE_URL = 
"https://api.hetzner.cloud/v1"

Instance Method Summary collapse

Constructor Details

#initialize(token) ⇒ Hetzner

Returns a new instance of Hetzner.



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 13

def initialize(token)
  @token = token
  @conn = Faraday.new do |f|
    f.request :json
    f.response :json
    f.headers["Authorization"] = "Bearer #{token}"
  end
end

Instance Method Details

#attach_volume(volume_id, server_id) ⇒ Object 



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 204

def attach_volume(volume_id, server_id)
  post("/volumes/#{volume_id.to_i}/actions/attach", { server: server_id.to_i })
end

#create_server(opts) ⇒ Object

Raises:



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 104

def create_server(opts)
  # Resolve IDs
  server_type = find_server_type(opts.type)
  raise Errors::ValidationError, "invalid server type: #{opts.type}" unless server_type

  image = find_image(opts.image)
  raise Errors::ValidationError, "invalid image: #{opts.image}" unless image

  create_opts = {
    name: opts.name,
    server_type: server_type["name"],
    image: image["name"],
    datacenter: opts.location,
    user_data: opts.user_data,
    start_after_create: true
  }

  # Add network if provided
  unless opts.network_id.blank?
    create_opts[:networks] = [opts.network_id.to_i]
  end

  # Add firewall if provided
  unless opts.firewall_id.blank?
    create_opts[:firewalls] = [{ firewall: opts.firewall_id.to_i }]
  end

  server = post("/servers", create_opts)["server"]
  to_server(server)
end

#create_volume(opts) ⇒ Object

Volume operations

Raises:



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 172

def create_volume(opts)
  server = get("/servers/#{opts.server_id.to_i}")["server"]
  raise Errors::VolumeError, "server not found: #{opts.server_id}" unless server

  volume = post("/volumes", {
    name: opts.name,
    size: opts.size,
    location: server.dig("datacenter", "location", "name"),
    format: "xfs"
  })["volume"]

  to_volume(volume)
end

#delete_firewall(id) ⇒ Object 



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 78

def delete_firewall(id)
  delete("/firewalls/#{id.to_i}")
end

#delete_network(id) ⇒ Object 



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 48

def delete_network(id)
  delete("/networks/#{id.to_i}")
end

#delete_server(id) ⇒ Object 



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 146

def delete_server(id)
  server = get("/servers/#{id.to_i}")["server"]

  # Remove from firewalls
  get("/firewalls")["firewalls"].each do |fw|
    fw["applied_to"]&.each do |applied|
      next unless applied["type"] == "server" && applied.dig("server", "id") == id.to_i

      remove_firewall_from_server(fw["id"], id.to_i)
    rescue StandardError
      # Ignore cleanup errors
    end
  end

  # Detach from networks
  server["private_net"]&.each do |pn|
    detach_server_from_network(id.to_i, pn["network"])
  rescue StandardError
    # Ignore cleanup errors
  end

  delete("/servers/#{id.to_i}")
end

#delete_volume(id) ⇒ Object 



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 200

def delete_volume(id)
  delete("/volumes/#{id.to_i}")
end

#detach_volume(volume_id) ⇒ Object 



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 208

def detach_volume(volume_id)
  post("/volumes/#{volume_id.to_i}/actions/detach", {})
end

#find_or_create_firewall(name) ⇒ Object

Firewall operations



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 54

def find_or_create_firewall(name)
  firewall = find_firewall_by_name(name)
  return to_firewall(firewall) if firewall

  firewall = create_firewall_api(
    name:,
    rules: [{
      direction: "in",
      protocol: "tcp",
      port: "22",
      source_ips: ["0.0.0.0/0", "::/0"]
    }]
  )

  to_firewall(firewall)
end

#find_or_create_network(name) ⇒ Object

Network operations



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 24

def find_or_create_network(name)
  network = find_network_by_name(name)
  return to_network(network) if network

  network = create_network_api(
    name:,
    ip_range: Utils::Constants::NETWORK_CIDR,
    subnets: [{
      type: "cloud",
      ip_range: Utils::Constants::SUBNET_CIDR,
      network_zone: "eu-central"
    }]
  )

  to_network(network)
end

#find_server(name) ⇒ Object

Server operations



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 84

def find_server(name)
  server = find_server_by_name(name)
  return nil unless server

  to_server(server)
end

#find_server_by_id(id) ⇒ Object 



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 91

def find_server_by_id(id)
  server = get("/servers/#{id.to_i}")["server"]
  return nil unless server

  to_server(server)
rescue Errors::NotFoundError
  nil
end

#get_firewall_by_name(name) ⇒ Object

Raises:



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 71

def get_firewall_by_name(name)
  firewall = find_firewall_by_name(name)
  raise Errors::FirewallError, "firewall not found: #{name}" unless firewall

  to_firewall(firewall)
end

#get_network_by_name(name) ⇒ Object

Raises:



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 41

def get_network_by_name(name)
  network = find_network_by_name(name)
  raise Errors::NetworkError, "network not found: #{name}" unless network

  to_network(network)
end

#get_volume(id) ⇒ Object 



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 186

def get_volume(id)
  volume = get("/volumes/#{id.to_i}")["volume"]
  return nil unless volume

  to_volume(volume)
end

#get_volume_by_name(name) ⇒ Object 



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 193

def get_volume_by_name(name)
  volume = get("/volumes")["volumes"].find { |v| v["name"] == name }
  return nil unless volume

  to_volume(volume)
end

#list_locations ⇒ Object

List available datacenters for onboarding (returns datacenter-level granularity)



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 276

def list_locations
  get("/datacenters")["datacenters"].map do |d|
    {
      name: d["name"],
      city: d.dig("location", "city"),
      country: d.dig("location", "country"),
      description: d["description"]
    }
  end
end

#list_server_types(location: nil) ⇒ Object

List available server types for onboarding When location (datacenter) is provided, filters to only actually available types



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 245

def list_server_types(location: nil)
  all_types = get("/server_types")["server_types"]

  # If no location specified, return all with basic info
  types_hash = all_types.each_with_object({}) do |t, h|
    h[t["id"]] = {
      id: t["id"],
      name: t["name"],
      description: t["description"],
      cores: t["cores"],
      memory: t["memory"],
      disk: t["disk"],
      cpu_type: t["cpu_type"],
      architecture: t["architecture"],
      prices: t["prices"]
    }
  end

  if location
    # Filter by datacenter's actually available server types
    datacenter = get("/datacenters")["datacenters"].find { |d| d["name"] == location }
    return [] unless datacenter

    available_ids = datacenter.dig("server_types", "available") || []
    types_hash.values_at(*available_ids).compact
  else
    types_hash.values
  end
end

#list_servers ⇒ Object 



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 100

def list_servers
  get("/servers")["servers"].map { |s| to_server(s) }
end

#validate_credentials ⇒ Object 



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 236

def validate_credentials
  get("/server_types")
  true
rescue Errors::AuthenticationError => e
  raise Errors::ValidationError, "hetzner credentials invalid: #{e.message}"
end

#validate_instance_type(instance_type) ⇒ Object

Validation operations

Raises:



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 222

def validate_instance_type(instance_type)
  server_type = find_server_type(instance_type)
  raise Errors::ValidationError, "invalid hetzner server type: #{instance_type}" unless server_type

  true
end

#validate_region(region) ⇒ Object

Raises:



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 229

def validate_region(region)
  datacenter = find_datacenter(region)
  raise Errors::ValidationError, "invalid hetzner datacenter: #{region}" unless datacenter

  true
end

#wait_for_device_path(volume_id, _ssh) ⇒ Object 



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 212

def wait_for_device_path(volume_id, _ssh)
  # Hetzner provides device_path in API response
  Utils::Retry.poll(max_attempts: 30, interval: 2) do
    volume = get("/volumes/#{volume_id.to_i}")["volume"]
    volume&.dig("linux_device").then { |d| d unless d.blank? }
  end
end

#wait_for_server(server_id, max_attempts) ⇒ Object

Raises:



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# File 'lib/nvoi/external/cloud/hetzner.rb', line 135

def wait_for_server(server_id, max_attempts)
  server = Utils::Retry.poll(max_attempts:, interval: Utils::Constants::SERVER_READY_INTERVAL) do
    s = get("/servers/#{server_id.to_i}")["server"]
    to_server(s) if s["status"] == "running"
  end

  raise Errors::ServerCreationError, "server did not become running after #{max_attempts} attempts" unless server

  server
end