add initial inst-fs integration

* register instfs plugin
* add instfs data to consul

closes CNVS-38588

test plan: none

Change-Id: Iaabcea702b001be75532b24ced3e8eeee574e424
Reviewed-on: https://gerrit.instructure.com/123199
Reviewed-by: Jacob Fugal <jacob@instructure.com>
Tested-by: Jenkins
Product-Review: Xander Moffatt <xmoffatt@instructure.com>
QA-Review: Xander Moffatt <xmoffatt@instructure.com>

app/views/plugins/_inst_fs_settings.html.erb

@@ -0,0 +1,20 @@
+<%
+# Copyright (C) 2016 - present Instructure, Inc.
+#
+# This file is part of Canvas.
+#
+# Canvas 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, version 3 of the License.
+#
+# Canvas 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 this program. If not, see <http://www.gnu.org/licenses/>.
+%>
+
+<%= fields_for :settings, OpenObject.new(settings) do |f| %>
+<% end %>

config/consul.yml.example

@@ -19,6 +19,9 @@ test:
     address-book:
       app-host: http://address-book.docker
       secret: opensesame
+    inst-fs:
+      app-host: http://api.instfs.docker
+      secret: supersecretyup
     live-events-subscription-service:
       app-host: http://les.docker
       sad-panda: null
@@ -36,6 +39,9 @@ development:
     address-book:
       app-host: http://address-book.docker
       secret: opensesame
+    inst-fs:
+      app-host: http://api.instfs.docker
+      secret: supersecretyup
     live-events-subscription-service:
       app-host: http://les.docker
     live-events:

lib/canvas/plugins/default_plugins.rb

@@ -425,4 +425,13 @@
   :settings_partial => 'plugins/live_events_settings',
   :validator => 'LiveEventsValidator'
 })
+Canvas::Plugin.register('inst_fs', nil, {
+  :name =>lambda{ t :name, 'Inst-FS' },
+  :description => lambda{ t :description, 'File service that proxies for S3.' },
+  :author => 'Instructure',
+  :author_website => 'http://www.instructure.com',
+  :version => '0.0.1',
+  :settings => nil,
+  :settings_partial => 'plugins/inst_fs_settings'
+})
 require_dependency 'canvas/plugins/address_book'

lib/inst_fs.rb

@@ -0,0 +1,41 @@
+#
+# Copyright (C) 2016 - present Instructure, Inc.
+#
+# This file is part of Canvas.
+#
+# Canvas 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, version 3 of the License.
+#
+# Canvas 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 this program. If not, see <http://www.gnu.org/licenses/>.
+
+module InstFS
+  class << self
+    def enabled?
+      Canvas::Plugin.find('inst_fs').enabled?
+    end
+
+    def app_host
+      setting("app-host")
+    end
+
+    def jwt_secret
+      setting("secret")
+    end
+
+    private
+    def setting(key)
+      settings = Canvas::DynamicSettings.from_cache("inst-fs", expires_in: 5.minutes, use_env: false)
+      settings[key]
+    rescue Imperium::TimeoutError => e
+      Canvas::Errors.capture_exception(:inst_fs, e)
+      nil
+    end
+  end
+end