I've just updated my Rails app to 5.2, and configured it to use the new config/credentials.yml.enc
file.
When I try to deploy, I get this error:
NameError: uninitialized constant Rails
/Users/me/Documents/project/config/deploy.rb:27:in `<top (required)>'
That's pointing to this line in my config/deploy.rb
file:
set :rollbar_token, Rails.application.credentials[:rollbar_token]
So it appears that while capistrano is running, it doesn't have access to Rails.application.credentials
.
How are you all handling this? I've got some ideas...
ENV
variable
Rails.application.credentials
config/deploy.rb
# config/deploy.rb
require File.expand_path("./environment", __dir__)
This include make constants like Rails.application
accessible in files like config/deploy/production.rb
. Now things like the following are possible:
# config/deploy/staging.rb
server "production.lan", user: "production", roles: %w{app db web}
set :stage, :production
set :branch, "development"
set :pg_password, Rails.application.credentials[:staging][:postgres][:password]
master.key
the file on the server (user read-only) like so: namespace :setup do
desc "setup: copy config/master.key to shared/config"
task :copy_linked_master_key do
on roles(fetch(:setup_roles)) do
sudo :mkdir, "-pv", shared_path
upload! "config/master.key", "#{shared_path}/config/master.key"
sudo :chmod, "600", "#{shared_path}/config/master.key"
end
end
before "deploy:symlink:linked_files", "setup:copy_linked_master_key"
end
Put it in your lib/capistrano/tasks/setup.rake
In deploy.rb
:
set :linked_files, fetch(:linked_files, []).push("config/master.key")
Make sure your Capfile
has the line
# Load custom tasks from `lib/capistrano/tasks` if you have any defined
Dir.glob("lib/capistrano/tasks/*.rake").each { |r| import r }
我解决了如下问题:
set :rollbar_token, YAML.load(`rails credentials:show`)['rollbar_token']
require File.expand_path("./environment", __dir__)
puts App::Application.credentials.rollbar_token
The way I solve this is to declare a $ROLLBAR_ACCESS_TOKEN
environment variable on the server. I place it at the top of ~deployer/.bashrc
like this:
export ROLLBAR_ACCESS_TOKEN=...
Then I integrate with Capistrano by defining this task:
task :set_rollbar_token do
on release_roles(:all).first do
set :rollbar_token, capture("echo $ROLLBAR_ACCESS_TOKEN").chomp
end
end
before "rollbar:deploy", "set_rollbar_token"
It seemed to me non-ideal to load the whole of Rails here, or to have to read command line output, so here's an alternative solution:
require "active_support/encrypted_configuration"
require "active_support/core_ext/hash/keys"
module CredentialLoader
def read_credentials(environment:)
YAML.load(
ActiveSupport::EncryptedConfiguration.new(
config_path: "config/credentials/#{environment}.yml.enc",
key_path: "config/credentials/#{environment}.key",
env_key: environment.to_s,
raise_if_missing_key: true
).read
)
end
end
Then you can do this in your deploy.rb
:
include CredentialLoader
set :rollbar_token, read_credentials(environment: fetch(:stage))["rollbar_access_token"]
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