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| author | Christopher Baines <mail@cbaines.net> | 2019-05-27 21:35:53 +0100 |
|---|---|---|
| committer | Christopher Baines <mail@cbaines.net> | 2019-05-30 08:33:03 +0100 |
| commit | 859302774c4d719cf949f419d0efcfd8cbad6ca2 (patch) | |
| tree | a83c053f6a0e95554ea30784caf2837eb6837179 /app/models/backends/terraform_aws.rb | |
| parent | 1acde9a21a50f4227930afb5b6b9eda1cace54b8 (diff) | |
| download | govuk-mini-environment-admin-859302774c4d719cf949f419d0efcfd8cbad6ca2.tar govuk-mini-environment-admin-859302774c4d719cf949f419d0efcfd8cbad6ca2.tar.gz | |
Add a new AWS backend using Amazon Machine Images
The existing AWS backend uses system containers backed on to the AWS
hosted NFS service (EFS). This has some advantages, but also some
disadvantages.
Using the EFS service allows building a container on one instance,
with the state being held on the EFS, and then launching a new
instance to run the container. Using EFS also provides persistence, at
least beyond individual EC2 instances.
However, build performance when using EFS is poor compared with a
local store without the overhead of the network latency. Additionally,
the startup speed of the container running off EFS is slow compared to
local storage.
This backend doesn't use EFS, instead the Guix store sits on instance
storage. Rather than using a system container for a Mini Environment,
an Amazon Machine Image (AMI) is built instead. The fast local storage
makes builds faster, and using EBS storage for the Mini Envirnoments
as well as not having the overhead of starting Ubuntu, then starting
the container also makes startup faster.
Diffstat (limited to 'app/models/backends/terraform_aws.rb')
| -rw-r--r-- | app/models/backends/terraform_aws.rb | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/app/models/backends/terraform_aws.rb b/app/models/backends/terraform_aws.rb index d3d56d1..64d24ef 100644 --- a/app/models/backends/terraform_aws.rb +++ b/app/models/backends/terraform_aws.rb @@ -1,5 +1,5 @@ # GOV.UK Mini Environment Admin -# Copyright © 2018 Christopher Baines <mail@cbaines.net> +# Copyright © 2018, 2019 Christopher Baines <mail@cbaines.net> # # This file is part of the GOV.UK Mini Environment Admin. # @@ -47,7 +47,7 @@ class Backends::TerraformAws < ApplicationRecord self.table_name = 'terraform_aws_backends' def self.label - 'Amazon Web Services' + 'Amazon Web Services (using EFS)' end def self.available? |