Module: Pangea::Kubernetes::Backends::GcpGke

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

Overview

GCP GKE backend — creates managed GKE clusters with VPC-native networking.

Class Method Summary collapse

Methods included from Base

included

Class Method Details

.backend_name ⇒ Object 



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# File 'lib/pangea/kubernetes/backends/gcp_gke.rb', line 27

def backend_name = :gcp

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

Create the GKE cluster



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# File 'lib/pangea/kubernetes/backends/gcp_gke.rb', line 94

def create_cluster(ctx, name, config, result, tags)
  cluster_attrs = {
    name: "#{name}-cluster",
    location: config.region,
    project: config.project,
    initial_node_count: 1,
    remove_default_node_pool: true,
    min_master_version: config.kubernetes_version,
    deletion_protection: false,
    networking_mode: 'VPC_NATIVE',
    resource_labels: gke_labels(tags)
  }

  # VPC-native networking
  if result.network
    cluster_attrs[:network] = result.network[:vpc]&.id
    cluster_attrs[:subnetwork] = result.network[:subnet]&.id
    cluster_attrs[:ip_allocation_policy] = {
      cluster_secondary_range_name: "#{name}-pods",
      services_secondary_range_name: "#{name}-services"
    }
  end

  # Private cluster
  if config.network&.private_endpoint
    cluster_attrs[:private_cluster_config] = {
      enable_private_nodes: true,
      enable_private_endpoint: !config.network.public_endpoint,
      master_ipv4_cidr_block: '172.16.0.0/28'
    }
  end

  # Workload Identity
  if config.project
    cluster_attrs[:workload_identity_config] = {
      workload_pool: "#{config.project}.svc.id.goog"
    }
  end

  # Release channel
  cluster_attrs[:release_channel] = { channel: 'REGULAR' }

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

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

GKE uses Workload Identity — no standalone IAM resources needed



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# File 'lib/pangea/kubernetes/backends/gcp_gke.rb', line 69

def create_iam(ctx, name, config, tags)
  iam = Architecture::GcpIamResult.new

  # Service account for GKE nodes
  iam.node_sa = ctx.(
    :"#{name}_node_sa",
    account_id: "#{name}-gke-nodes",
    display_name: "#{name} GKE Node Service Account",
    project: config.project
  )

  # Bind minimum required roles
  %w[logging.logWriter monitoring.metricWriter monitoring.viewer].each do |role|
    ctx.google_project_iam_member(
      :"#{name}_node_#{role.gsub('.', '_')}",
      project: config.project,
      role: "roles/#{role}",
      member: "serviceAccount:#{iam.node_sa.email}"
    )
  end

  iam
end

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

Create GCP VPC network + subnet



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

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

  network.vpc = ctx.google_compute_network(
    :"#{name}_network",
    name: "#{name}-network",
    auto_create_subnetworks: false,
    project: config.project
  )

  subnet = ctx.google_compute_subnetwork(
    :"#{name}_subnet",
    name: "#{name}-subnet",
    ip_cidr_range: config.network&.vpc_cidr || '10.0.0.0/20',
    region: config.region,
    network: network.vpc.id,
    project: config.project,
    secondary_ip_range: [
      { range_name: "#{name}-pods", ip_cidr_range: config.network&.pod_cidr || '10.1.0.0/16' },
      { range_name: "#{name}-services", ip_cidr_range: config.network&.service_cidr || '10.2.0.0/20' }
    ]
  )
  network.add_subnet(:subnet, subnet)

  network
end

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

Create a GKE node pool



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# File 'lib/pangea/kubernetes/backends/gcp_gke.rb', line 140

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

  node_pool_attrs = {
    name: "#{name}-#{pool_config.name}",
    cluster: cluster_ref.id,
    location: tags[:Region] || 'us-central1',
    initial_node_count: pool_config.effective_desired_size,
    node_config: {
      machine_type: pool_config.instance_types.first,
      disk_size_gb: pool_config.disk_size_gb,
      oauth_scopes: ['https://www.googleapis.com/auth/cloud-platform'],
      labels: pool_config.labels.merge(
        'node-pool' => pool_config.name.to_s
      )
    },
    autoscaling: {
      min_node_count: pool_config.min_size,
      max_node_count: pool_config.max_size
    }
  }

  ctx.google_container_node_pool(pool_name, node_pool_attrs)
end

.load_provider! ⇒ Object 



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

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

.managed_kubernetes? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pangea/kubernetes/backends/gcp_gke.rb', line 28

def managed_kubernetes? = true

.required_gem ⇒ Object 



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

def required_gem = 'pangea-gcp'