Module: Pangea::Kubernetes::Backends::AzureAks

Includes:
Base
Defined in:
lib/pangea/kubernetes/backends/azure_aks.rb

Overview

Azure AKS backend — creates managed AKS clusters. AKS bundles default node pool with the cluster resource, so create_cluster handles both.

Class Method Summary collapse

Methods included from Base

included

Class Method Details

.backend_name ⇒ Object 



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# File 'lib/pangea/kubernetes/backends/azure_aks.rb', line 29

def backend_name = :azure

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

Create AKS cluster with default node pool



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# File 'lib/pangea/kubernetes/backends/azure_aks.rb', line 81

def create_cluster(ctx, name, config, result, tags)
  system_pool = config.system_node_pool
  rg_name = config.resource_group_name || result.network&.dig(:resource_group)&.name || "#{name}-rg"
  dns_prefix = config.dns_prefix || name.to_s

  cluster_attrs = {
    name: "#{name}-cluster",
    resource_group_name: rg_name,
    location: config.region,
    dns_prefix: dns_prefix,
    kubernetes_version: config.kubernetes_version,
    default_node_pool: {
      name: system_pool.name.to_s[0..11], # AKS max 12 chars
      vm_size: system_pool.instance_types.first,
      node_count: system_pool.effective_desired_size,
      min_count: system_pool.min_size,
      max_count: system_pool.max_size,
      enable_auto_scaling: true,
      os_disk_size_gb: system_pool.disk_size_gb
    },
    identity: { type: 'SystemAssigned' },
    tags: tags
  }

  cluster_attrs[:sku_tier] = 'Standard' if tags[:Environment] == 'production'

  # Network profile
  if result.network&.dig(:subnet)
    cluster_attrs[:default_node_pool][:vnet_subnet_id] = result.network[:subnet].id
  end

  ctx.azurerm_kubernetes_cluster(:"#{name}_cluster", cluster_attrs)
end

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

AKS uses managed identity — no standalone IAM resources needed



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# File 'lib/pangea/kubernetes/backends/azure_aks.rb', line 76

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

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

Create Azure VNet + subnet



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# File 'lib/pangea/kubernetes/backends/azure_aks.rb', line 43

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
end

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

Create additional AKS node pool



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# File 'lib/pangea/kubernetes/backends/azure_aks.rb', line 116

def create_node_pool(ctx, name, cluster_ref, pool_config, tags)
  pool_name = :"#{name}_#{pool_config.name}"

  node_pool_attrs = {
    name: pool_config.name.to_s[0..11], # AKS max 12 chars
    kubernetes_cluster_id: cluster_ref.id,
    vm_size: pool_config.instance_types.first,
    node_count: pool_config.effective_desired_size,
    min_count: pool_config.min_size,
    max_count: pool_config.max_size,
    enable_auto_scaling: true,
    os_disk_size_gb: pool_config.disk_size_gb,
    tags: tags.merge(NodePool: pool_config.name.to_s)
  }

  node_pool_attrs[:node_labels] = pool_config.labels if pool_config.labels.any?

  if pool_config.taints.any?
    node_pool_attrs[:node_taints] = pool_config.taints.map do |t|
      "#{t[:key]}=#{t[:value]}:#{t[:effect]}"
    end
  end

  ctx.azurerm_kubernetes_cluster_node_pool(pool_name, node_pool_attrs)
end

.load_provider! ⇒ Object 



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

def load_provider!
  require required_gem
rescue LoadError => e
  raise LoadError,
        "Backend :azure 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_aks.rb', line 30

def managed_kubernetes? = true

.required_gem ⇒ Object 



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

def required_gem = 'pangea-azure'