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# GOV.UK Mini Environment Admin
# Copyright © 2018 Christopher Baines <mail@cbaines.net>
#
# This file is part of the GOV.UK Mini Environment Admin.
#
# The GOV.UK Mini Environment Admin is free software: you can
# redistribute it and/or modify it under the terms of the GNU Affero
# General Public License as published by the Free Software Foundation,
# either version 3 of the License, or (at your option) any later
# version.
#
# The GOV.UK Mini Environment Admin is distributed in the hope that it
# will be useful, but WITHOUT ANY WARRANTY; without even the implied
# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public
# License along with the GOV.UK Mini Environment Admin. If not, see
# <http://www.gnu.org/licenses/>.
# == Schema Information
#
# Table name: terraform_aws_backends
#
# id :integer not null, primary key
# label :string
# aws_region :string
# aws_access_key_id :string
# aws_secret_access_key :string
# created_at :datetime not null
# updated_at :datetime not null
# domain :string
# route_53_zone_id :string not null
# vpc_id :string not null
#
require 'ruby_terraform'
class Backends::TerraformAws < ApplicationRecord
has_many :mini_environments, as: :backend
self.table_name = 'terraform_aws_backends'
def self.label
'Amazon Web Services'
end
def type_and_id
"#{self.class.name}=#{id}"
end
def build(mini_environment)
slug = mini_environment.name.parameterize
GovukGuix::BuildMiniEnvironment.build(
mini_environment.id,
services: mini_environment.services.map(&:build_argument_string),
arguments: {
type: 'container-start-script',
app_domain: "#{slug}.#{domain}",
web_domain: "www.#{slug}.#{domain}",
use_https: 'certbot',
http_ports_mode: 'alternative',
read_bundle_install_input_as_tar_archive: true,
signon_instance_name: slug,
admin_environment_label: mini_environment.name,
use_error_pages: 'true',
origin_basic_auth: "#{slug}=#{slug}",
share: [
'/var/cache/govuk-mini-environment-admin=/var/cache',
'/var/lib/govuk-mini-environment-admin=/var/lib',
'/var/log/govuk-mini-environment-admin=/var/log'
]
},
run_remotely_on_host: "ubuntu@guix-daemon.#{domain}"
)
end
def create_data_snapshot
GovukGuix::CreateDataSnapshotJob.enqueue(
run_remotely_on_host: "ubuntu@guix-daemon.#{domain}",
backend_type: self.class.name,
backend_id: id
)
end
def start(mini_environment)
logger.info "Setting up #{mini_environment.name}"
within_terraform_working_directory(mini_environment) do
RubyTerraform.apply(
vars: terraform_variables(mini_environment),
auto_approve: true
)
end
end
def destroy(mini_environment)
within_terraform_working_directory(mini_environment) do
RubyTerraform.destroy(
vars: terraform_variables(mini_environment),
force: true
)
end
end
def backend_terraform_variables
public_ip_address = ENV[
'GOVUK_MINI_ENVIRONMENT_ADMIN_PUBLIC_IP_ADDRESS'
]
raise 'missing public ip address' if public_ip_address.nil?
common_terraform_variables.merge(
aws_vpc_id: vpc_id,
ssh_public_key: ssh_public_key,
backend_slug: label.parameterize,
mini_environment_admin_guix_public_key: guix_public_key,
mini_environment_admin_public_ip_address: public_ip_address
)
end
def deploy_backend
TerraformWorkingDirectory.new(
terraform_state_id,
'terraform/aws/backend'
).within_working_directory do
RubyTerraform.apply(
vars: backend_terraform_variables,
auto_approve: true
)
end
end
def destroy_backend
TerraformWorkingDirectory.new(
terraform_state_id,
'terraform/aws/backend'
).within_working_directory do
RubyTerraform.destroy(
vars: backend_terraform_variables,
force: true
)
end
end
def available_data_snapshots
GovukGuix::DataSnapshot.where(backend: self)
end
def within_terraform_working_directory(mini_environment, &block)
TerraformWorkingDirectory.new(
"mini_environment/#{mini_environment.id}",
'terraform/aws/mini_environment'
).within_working_directory(&block)
end
def signon_url(mini_environment)
"https://signon.#{mini_environment.name.parameterize}.#{domain}"
end
def common_terraform_variables
{
aws_access_key: aws_access_key_id,
aws_secret_key: aws_secret_access_key,
aws_region: aws_region,
ssh_public_key: ssh_public_key,
aws_route_53_zone_id: route_53_zone_id
}
end
def terraform_variables(mini_environment)
common_terraform_variables.merge(
slug: mini_environment.name.parameterize,
start_command: mini_environment.backend_data['build_output'],
backend_remote_state_address: (
'http://localhost:3000' +
Rails
.application
.routes
.url_helpers
.terraform_http_backend_path(terraform_state_id)
)
)
end
def terraform_state_id
"backend/terraform_aws/#{id}"
end
def ssh_public_key
File.open("#{ENV['HOME']}/.ssh/id_rsa.pub", &:readline)
end
def guix_public_key
"(entry #{File.read("/etc/guix/signing-key.pub")} (tag (guix import)))"
end
end
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