Improve AWS backend support

3 files changed, 51 insertions, 39 deletions

diff --git a/app/models/backends/terraform.rb b/app/models/backends/terraform.rb
new file mode 100644
index 0000000..e1f937f
--- /dev/null
+++ b/app/models/backends/terraform.rb
@@ -0,0 +1,22 @@
+module Backends::Terraform
+  def working_directory(mini_environment)
+    "tmp/terraform-working-directories/#{mini_environment.name}"
+  end
+
+  def terraform_backend_address(mini_environment)
+    (
+      'http://localhost:3000' +
+      Rails
+        .application
+        .routes
+        .url_helpers
+        .mini_environment_terraform_http_backend_path(
+          mini_environment
+        )
+    )
+  end
+  
+  def terraform_plugin_dir
+    ENV['PATH'].split(':').first
+  end
+end
diff --git a/app/models/backends/terraform_aws.rb b/app/models/backends/terraform_aws.rb
index d79ff51..246af8b 100644
--- a/app/models/backends/terraform_aws.rb
+++ b/app/models/backends/terraform_aws.rb
@@ -12,6 +12,8 @@
 #
 
 class Backends::TerraformAws < ApplicationRecord
+  include Backends::Terraform
+
   has_many :mini_environments, as: :backend
 
   self.table_name = "terraform_aws_backends"
@@ -30,26 +32,26 @@ class Backends::TerraformAws < ApplicationRecord
     )
   end
   
-  def start
-    logger.info "Setting up #{@mini_environment.name}"
+  def start(mini_environment)
+    logger.info "Setting up #{mini_environment.name}"
 
-    Dir.chdir("tmp/terraform-working-directories/#{@mini_environment.name}") do # TODO
-      RubyTerraform.init(
-        backend: true,
-        source: "terraform/aws", # TODO
-        backend_config: {
-          address: 'http://localhost:3000' + Rails.application.routes.url_helpers.terraform_http_backend_path
-        },
-        plugin_dir: "/gnu/store/x0b54k4i02vi05ghc0np7cqs2p5q6i31-profile/bin"
-      )
+    source = File.expand_path("terraform/libvirt")
+    FileUtils.mkdir_p working_directory(mini_environment)
+    
+    Dir.chdir(working_directory(mini_environment)) do
+      if Dir.empty?(".")
+        RubyTerraform.init(
+          backend: true,
+          from_module: source,
+          backend_config: {
+            address: terraform_backend_address(mini_environment)
+          },
+          plugin_dir: plugin_dir
+        )
+      end
 
       RubyTerraform.apply(
-        vars: {
-          aws_region: 'eu-west-1',
-          slug: @mini_environment.name.parameterize,
-          ssh_public_key: ssh_public_key,
-          start_command: @mini_environment.start_command
-        },
+        vars: terraform_variables(mini_environment),
         auto_approve: true
       )
     end
@@ -59,7 +61,7 @@ class Backends::TerraformAws < ApplicationRecord
     Dir.chdir('terraform/aws') do
       RubyTerraform.destroy(
         vars: {
-          aws_region: 'eu-west-1',
+          aws_region: aws_region,
           slug: @mini_environment.name.parameterize,
           ssh_public_key: ssh_public_key,
           start_command: @mini_environment.start_command
@@ -69,6 +71,15 @@ class Backends::TerraformAws < ApplicationRecord
     end
   end
 
+  def terraform_variables(mini_environment)
+    mini_environment.backend_data.merge(
+      aws_region: self.aws_region,
+      slug: mini_environment.name.parameterize,
+      ssh_public_key: ssh_public_key,
+      start_command: mini_environment.start_command,
+    )
+  end
+
   def ssh_public_key
     File.open("#{ENV['HOME']}/.ssh/id_rsa.pub") do |file|
       file.readline()
diff --git a/app/models/backends/terraform_libvirt.rb b/app/models/backends/terraform_libvirt.rb
index 4cb63b7..11e04ad 100644
--- a/app/models/backends/terraform_libvirt.rb
+++ b/app/models/backends/terraform_libvirt.rb
@@ -72,27 +72,6 @@ class Backends::TerraformLibvirt < ApplicationRecord
     )
   end
 
-  def terraform_backend_address(mini_environment)
-    (
-      'http://localhost:3000' +
-      Rails
-        .application
-        .routes
-        .url_helpers
-        .mini_environment_terraform_http_backend_path(
-          mini_environment
-        )
-    )
-  end
-
-  def working_directory(mini_environment)
-    "tmp/terraform-working-directories/#{mini_environment.name}"
-  end
-
-  def plugin_dir
-    ENV['PATH'].split(':').first
-  end
-
   def ssh_public_key
     File.open("#{ENV['HOME']}/.ssh/id_rsa.pub") do |file|
       file.readline()