Module: Pangea::Kubernetes::Backends::AzureNixos

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

Overview

Azure NixOS backend — Azure VMs running NixOS with k3s/k8s via blackmatter-kubernetes modules.

Uses:

- Azure VMs for control plane (static)
- VM Scale Sets (VMSS) for worker node pools
- VNet + NSG for networking

No managed K8s services (AKS) — all k3s/k8s managed by NixOS.

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/azure_nixos.rb', line 37

def backend_name = :azure_nixos

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

Create control plane Azure VMs (static)



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# File 'lib/pangea/kubernetes/backends/azure_nixos.rb', line 107

def create_cluster(ctx, name, config, result, 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/azure_nixos.rb', line 118

def create_compute_instance(ctx, name, config, result, cloud_init, index, tags)
  system_pool = config.system_node_pool
  vm_size = system_pool.instance_types.first
  image_id = config.azure_image_id || config.nixos&.image_id
  rg_name = config.resource_group_name || result.network&.dig(:resource_group)&.name || "#{name}-rg"

  # Network interface
  nic = ctx.azurerm_network_interface(
    :"#{name}_cp_#{index}_nic",
    name: "#{name}-cp-#{index}-nic",
    resource_group_name: rg_name,
    location: config.region,
    ip_configuration: {
      name: 'internal',
      subnet_id: result.network&.dig(:subnet)&.id,
      private_ip_address_allocation: 'Dynamic',
      public_ip_address_id: nil
    },
    tags: tags
  )

  ctx.azurerm_linux_virtual_machine(
    :"#{name}_cp_#{index}",
    name: "#{name}-cp-#{index}",
    resource_group_name: rg_name,
    location: config.region,
    size: vm_size,
    network_interface_ids: [nic.id],
    admin_username: 'nixos',
    admin_ssh_key: {
      username: 'nixos',
      public_key: '${file("~/.ssh/id_ed25519.pub")}'
    },
    os_disk: {
      caching: 'ReadWrite',
      storage_account_type: 'Premium_LRS',
      disk_size_gb: system_pool.disk_size_gb
    },
    source_image_id: image_id,
    custom_data: cloud_init,
    identity: { type: 'SystemAssigned' },
    tags: tags.merge(
      Role: 'control-plane',
      NodeIndex: index.to_s,
      Distribution: config.distribution.to_s
    )
  )
end

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

No standalone IAM — Azure VMs use Managed Identity



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# File 'lib/pangea/kubernetes/backends/azure_nixos.rb', line 102

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

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

Create Resource Group + VNet + Subnet + NSG



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# File 'lib/pangea/kubernetes/backends/azure_nixos.rb', line 51

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

  network.resource_group = ctx.azurerm_resource_group(
    :"#{name}_rg",
    name: "#{name}-rg",
    location: config.region,
    tags: tags
  )

  network.vnet = ctx.azurerm_virtual_network(
    :"#{name}_vnet",
    name: "#{name}-vnet",
    resource_group_name: network.resource_group.ref(:name),
    location: config.region,
    address_space: [config.network&.vpc_cidr || '10.0.0.0/16'],
    tags: tags
  )
  network.vpc = network.vnet

  subnet = ctx.azurerm_subnet(
    :"#{name}_subnet",
    name: "#{name}-subnet",
    resource_group_name: network.resource_group.ref(:name),
    virtual_network_name: network.vnet.ref(:name),
    address_prefixes: [config.network&.pod_cidr || '10.0.1.0/24']
  )
  network.add_subnet(:subnet, subnet)

  # Network Security Group
  network.nsg = ctx.azurerm_network_security_group(
    :"#{name}_nsg",
    name: "#{name}-nsg",
    resource_group_name: network.resource_group.ref(:name),
    location: config.region,
    security_rule: azure_nsg_rules(config.distribution),
    tags: tags
  )
  network.sg = network.nsg

  # Associate NSG with subnet
  ctx.azurerm_subnet_network_security_group_association(
    :"#{name}_nsg_assoc",
    subnet_id: subnet.id,
    network_security_group_id: network.nsg.id
  )

  network
end

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

Create worker node pool via VMSS (VM Scale Set)



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# File 'lib/pangea/kubernetes/backends/azure_nixos.rb', line 112

def create_node_pool(ctx, name, cluster_ref, pool_config, tags)
  nixos_create_node_pool(ctx, name, cluster_ref, pool_config, tags)
end

.create_worker_pool(ctx, name, _cluster_ref, pool_config, cloud_init, tags) ⇒ Object 



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# File 'lib/pangea/kubernetes/backends/azure_nixos.rb', line 167

def create_worker_pool(ctx, name, _cluster_ref, pool_config, cloud_init, tags)
  pool_name = :"#{name}_#{pool_config.name}"
  vm_size = pool_config.instance_types.first

  vmss = ctx.azurerm_linux_virtual_machine_scale_set(
    pool_name,
    name: "#{name}-#{pool_config.name}-vmss",
    resource_group_name: tags[:ResourceGroupName] || "#{name}-rg",
    location: tags[:Region] || 'eastus',
    sku: vm_size,
    instances: pool_config.effective_desired_size,
    admin_username: 'nixos',
    admin_ssh_key: {
      username: 'nixos',
      public_key: '${file("~/.ssh/id_ed25519.pub")}'
    },
    os_disk: {
      caching: 'ReadWrite',
      storage_account_type: 'Premium_LRS',
      disk_size_gb: pool_config.disk_size_gb
    },
    source_image_id: tags[:ImageId],
    custom_data: cloud_init,
    network_interface: {
      name: "#{name}-#{pool_config.name}-nic",
      primary: true,
      ip_configuration: {
        name: 'internal',
        subnet_id: tags[:SubnetId],
        primary: true
      }
    },
    identity: { type: 'SystemAssigned' },
    tags: tags.merge(
      NodePool: pool_config.name.to_s,
      Role: 'worker'
    )
  )

  # Autoscale setting
  ctx.azurerm_monitor_autoscale_setting(
    :"#{pool_name}_autoscale",
    name: "#{name}-#{pool_config.name}-autoscale",
    resource_group_name: tags[:ResourceGroupName] || "#{name}-rg",
    location: tags[:Region] || 'eastus',
    target_resource_id: vmss.id,
    profile: {
      name: 'default',
      capacity: {
        default: pool_config.effective_desired_size,
        minimum: pool_config.min_size,
        maximum: pool_config.max_size
      },
      rule: [{
        metric_trigger: {
          metric_name: 'Percentage CPU',
          metric_resource_id: vmss.id,
          operator: 'GreaterThan',
          threshold: 70,
          time_aggregation: 'Average',
          time_grain: 'PT1M',
          time_window: 'PT5M',
          statistic: 'Average'
        },
        scale_action: {
          direction: 'Increase',
          type: 'ChangeCount',
          value: 1,
          cooldown: 'PT5M'
        }
      }]
    }
  )

  vmss
end

.load_provider! ⇒ Object 



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# File 'lib/pangea/kubernetes/backends/azure_nixos.rb', line 41

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

.managed_kubernetes? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pangea/kubernetes/backends/azure_nixos.rb', line 38

def managed_kubernetes? = false

.required_gem ⇒ Object 



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# File 'lib/pangea/kubernetes/backends/azure_nixos.rb', line 39

def required_gem = 'pangea-azure'