Module: Pangea::Kubernetes::Backends::HcloudK3s

Extended by:
NixosBase
Includes:
Base
Defined in:
lib/pangea/kubernetes/backends/hcloud_k3s.rb

Overview

Hetzner Cloud NixOS backend. Provisions NixOS VMs with cloud-init carrying blackmatter-kubernetes config. Supports both k3s and vanilla Kubernetes distributions.

Constant Summary

Constants included from NixosBase

NixosBase::AGENT_BOOTSTRAP_KEYS, NixosBase::COMMON_PORTS, NixosBase::JOIN_SERVER_PLACEHOLDER, NixosBase::VANILLA_K8S_PORTS

Class Method Summary collapse

Methods included from NixosBase

base_firewall_ports, build_agent_bootstrap_secrets, build_agent_cloud_init, build_bootstrap_secrets, build_secrets_hash, build_server_cloud_init, create_compute_instance, create_worker_pool, nixos_create_cluster, nixos_create_node_pool, post_create_instance

Methods included from Base

included

Class Method Details

.backend_name ⇒ Object 



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# File 'lib/pangea/kubernetes/backends/hcloud_k3s.rb', line 31

def backend_name = :hcloud

.create_cluster(ctx, name, config, result, tags) ⇒ Object

Create control plane server(s) as hcloud_server resources



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# File 'lib/pangea/kubernetes/backends/hcloud_k3s.rb', line 75

def create_cluster(ctx, name, config, result, tags)
  # Create firewall first
  ctx.hcloud_firewall(
    :"#{name}_firewall",
    name: "#{name}-firewall",
    rules: hcloud_firewall_rules(config.distribution),
    labels: hcloud_labels(tags)
  )

  nixos_create_cluster(ctx, name, config, result, tags)
end

.create_compute_instance(ctx, name, config, result, cloud_init, index, tags) ⇒ Object

— NixosBase template hooks —



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# File 'lib/pangea/kubernetes/backends/hcloud_k3s.rb', line 121

def create_compute_instance(ctx, name, config, result, cloud_init, index, tags)
  system_pool = config.system_node_pool
  server_type = system_pool.instance_types.first
  firewall = result.network ? ctx.created_resources&.find { |r| r[:type] == 'hcloud_firewall' } : nil

  ctx.hcloud_server(
    :"#{name}_cp_#{index}",
    name: "#{name}-cp-#{index}",
    server_type: server_type,
    image: nixos_image(config),
    location: config.region,
    user_data: cloud_init,
    ssh_keys: system_pool.ssh_keys,
    firewall_ids: firewall ? [firewall[:ref].id] : [],
    labels: hcloud_labels(tags.merge(
      Role: 'control-plane',
      NodeIndex: index.to_s,
      Distribution: config.distribution.to_s
    ))
  )
end

.create_iam(_ctx, _name, _config, _tags) ⇒ Object

NixOS doesn’t use cloud IAM — return empty



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# File 'lib/pangea/kubernetes/backends/hcloud_k3s.rb', line 70

def create_iam(_ctx, _name, _config, _tags)
  Architecture::IamResult.new
end

.create_network(ctx, name, config, tags) ⇒ Object

Create Hetzner Cloud network + subnet



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# File 'lib/pangea/kubernetes/backends/hcloud_k3s.rb', line 45

def create_network(ctx, name, config, tags)
  network = Architecture::HcloudNetworkResult.new

  ip_range = config.network&.vpc_cidr || '10.0.0.0/16'
  network.network = ctx.hcloud_network(
    :"#{name}_network",
    name: "#{name}-network",
    ip_range: ip_range,
    labels: hcloud_labels(tags)
  )
  network.vpc = network.network

  subnet = ctx.hcloud_network_subnet(
    :"#{name}_subnet",
    network_id: network.network.id,
    type: 'cloud',
    network_zone: config.region,
    ip_range: config.network&.pod_cidr || '10.0.1.0/24'
  )
  network.add_subnet(:subnet, subnet)

  network
end

.create_node_pool(ctx, name, cluster_ref, pool_config, tags) ⇒ Object

Create worker nodes as hcloud_server resources



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# File 'lib/pangea/kubernetes/backends/hcloud_k3s.rb', line 88

def create_node_pool(ctx, name, cluster_ref, pool_config, tags)
  # Hetzner doesn't have ASG — create individual servers
  server_type = pool_config.instance_types.first
  count = pool_config.effective_desired_size

  servers = []
  count.times do |idx|
    # Generate per-worker cloud-init with unique node_index (not shared)
    cloud_init = build_agent_cloud_init(name, tags, cluster_ref, node_index: idx)

    server = ctx.hcloud_server(
      :"#{name}_#{pool_config.name}_#{idx}",
      name: "#{name}-#{pool_config.name}-#{idx}",
      server_type: server_type,
      image: 'ubuntu-24.04',
      location: tags[:Region] || 'nbg1',
      user_data: cloud_init,
      ssh_keys: pool_config.ssh_keys,
      labels: hcloud_labels(tags.merge(
        Role: 'worker',
        NodePool: pool_config.name.to_s,
        NodeIndex: idx.to_s
      ))
    )

    servers << server
  end

  servers.first
end

.load_provider! ⇒ Object 



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# File 'lib/pangea/kubernetes/backends/hcloud_k3s.rb', line 35

def load_provider!
  require required_gem
rescue LoadError => e
  raise LoadError,
        "Backend :hcloud requires gem 'pangea-hcloud'. " \
        "Add it to your Gemfile: gem 'pangea-hcloud'\n" \
        "Original error: #{e.message}"
end

.managed_kubernetes? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pangea/kubernetes/backends/hcloud_k3s.rb', line 32

def managed_kubernetes? = false

.post_create_instance(ctx, name, server, result, index, _tags) ⇒ Object

Override post_create_instance for Hetzner network attachment



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# File 'lib/pangea/kubernetes/backends/hcloud_k3s.rb', line 144

def post_create_instance(ctx, name, server, result, index, _tags)
  return unless result.network&.dig(:network)

  ctx.hcloud_server_network(
    :"#{name}_cp_#{index}_network",
    server_id: server.id,
    network_id: result.network[:network].id
  )
end

.required_gem ⇒ Object 



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# File 'lib/pangea/kubernetes/backends/hcloud_k3s.rb', line 33

def required_gem = 'pangea-hcloud'