Improve AWS backend support

5 files changed, 207 insertions, 41 deletions

diff --git a/app/controllers/backends/terraform_aws_controller.rb b/app/controllers/backends/terraform_aws_controller.rb
index b7f10ef..72c7e3a 100644
--- a/app/controllers/backends/terraform_aws_controller.rb
+++ b/app/controllers/backends/terraform_aws_controller.rb
@@ -1,7 +1,41 @@
 class Backends::TerraformAwsController < ApplicationController
   def new
+    @backend = Backends::TerraformAws.new
+  end
+
+  def create
+    backend = Backends::TerraformAws.create(backend_params)
+
+    flash[:success] = "#{backend.label} created"
+
+    redirect_to setup_path
+  end
+
+  def update
+    backend = Backends::TerraformAws.update(params[:id], backend_params)
+
+    flash[:success] = "#{backend.label} updated"
   end
 
   def show
+    @backend = Backends::TerraformAws.find(params[:id])
+  end
+
+  def destroy
+    backend = Backends::TerraformAws.find(params[:id])
+
+    backend.delete
+  end
+
+  private
+
+  def backend_params
+    params
+      .permit(
+        :label,
+        :aws_region,
+        :aws_access_key_id,
+        :aws_secret_access_key,
+      )
   end
 end
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()
diff --git a/app/views/backends/terraform_aws/show.html.erb b/app/views/backends/terraform_aws/show.html.erb
index e112d7d..a9324fc 100644
--- a/app/views/backends/terraform_aws/show.html.erb
+++ b/app/views/backends/terraform_aws/show.html.erb
@@ -1,2 +1,122 @@
-<h1>Backends::TerraformAws#show</h1>
-<p>Find me in app/views/backends/terraform_aws/show.html.erb</p>
+<a href="<%= setup_path %>" class="btn btn-lg btn-primary pull-right">
+  Back to Setup
+</a>
+
+<h1>Backend: <%= @backend.label %></h1>
+
+<div class="row">
+  <div class="col-md-8">
+    <h3>Update details</h3>
+    <br>
+
+    <%= form_with(model: @backend,
+                  url: { action: "update" },
+                  html: { class: "form-horizontal" }) do |f|
+    %>
+
+      <div class="form-group form-group-lg">
+        <%= f.label :label, class: 'col-sm-4 control-label' %>
+        <div class="col-sm-8">
+          <%= f.text_field(
+            :label,
+            class: 'form-control',
+            placeholder: 'Label for this backend'
+          ) %>
+        </div>
+      </div>
+
+      <div class="form-group form-group-lg">
+        <%= f.label :aws_region, 'AWS Region', class: 'col-sm-4 control-label' %>
+        <div class="col-sm-8">
+          <%= f.text_field(
+            :aws_region,
+            class: 'form-control',
+            placeholder: 'What region to use'
+          ) %>
+        </div>
+      </div>
+
+      <div class="form-group form-group-lg">
+        <%= f.label :aws_access_key_id, 'AWS Access Key ID', class: 'col-sm-4 control-label' %>
+        <div class="col-sm-8">
+          <%= f.text_field(
+            :aws_access_key_id,
+            class: 'form-control',
+          ) %>
+        </div>
+      </div>
+
+      <div class="form-group form-group-lg">
+        <%= f.label :aws_secret_access_key, 'AWS Secret Access Key', class: 'col-sm-4 control-label' %>
+        <div class="col-sm-8">
+          <%= f.password_field(
+            :aws_secret_access_key,
+            class: 'form-control',
+            placeholder: 'Secret key hidden',
+          ) %>
+          <span id="helpBlock" class="help-block">
+            The AWS Secret Access Key is not accessible once entered.
+          </span>
+        </div>
+      </div>
+
+      
+      <div class="form-group form-group-lg">
+        <div class="col-sm-offset-2 col-sm-10">
+          <%= f.submit "Save", class: 'btn btn-lg btn-success' %>
+        </div>
+      </div>
+    <% end %>
+  </div>
+  <div class="col-md-4">
+    <h3>Delete backend</h3>
+    <br>
+
+    <% unless @backend.mini_environments.empty? %>
+      <p>
+        Unable to delete backend, as mini environments using this
+        backend still exist.
+      </p>
+
+      <p>
+        To delete this backend, first delete all the mini environments
+        using it.
+      </p>
+    <% end %>
+
+    <%= form_with(model: @backend,
+                  url: { action: "destroy" },
+                  html: { class: "form-horizontal", method: :delete }) do |f|
+    %>
+      <%= f.submit(
+        "Delete",
+        class: (
+          'btn btn-lg btn-danger' +
+          (@backend.mini_environments.empty? ? '' : ' disabled')
+        )
+      ) %>
+    <% end %>
+
+  </div>
+</div>
+
+<h3>Mini environments</h3>
+
+<table class="table table-striped">
+  <tr>
+    <th>Name</th>
+    <th></th>
+  </tr>
+  <% @backend.mini_environments.each do |mini_environment| %>
+    <tr>
+      <td><%= mini_environment.name %></td>
+      <td>
+        <a class="btn btn-default btn-lg pull-right"
+           role="button"
+           href="<%= mini_environment_path(mini_environment) %>">
+          Show details
+        </a>
+      </td>
+    </tr>
+  <% end %>
+</table>