Loop all disks when displaying system info

Gemfile

@@ -349,3 +349,4 @@ gem 'health_check', '~> 1.5.1'
 
 # System information
 gem 'vmstat', '~> 2.1.0'
+gem 'sys-filesystem', '~> 1.1.6'

Gemfile.lock

@@ -716,6 +716,8 @@ GEM
       activerecord (>= 4.1, < 5.1)
       state_machines-activemodel (>= 0.3.0)
     stringex (2.5.2)
+    sys-filesystem (1.1.6)
+      ffi
     systemu (2.6.5)
     task_list (1.0.2)
       html-pipeline
@@ -970,6 +972,7 @@ DEPENDENCIES
   spring-commands-teaspoon (~> 0.0.2)
   sprockets (~> 3.6.0)
   state_machines-activerecord (~> 0.4.0)
+  sys-filesystem (~> 1.1.6)
   task_list (~> 1.0.2)
   teaspoon (~> 1.1.0)
   teaspoon-jasmine (~> 2.2.0)

app/controllers/admin/system_info_controller.rb

 class Admin::SystemInfoController < Admin::ApplicationController
   def show
+    excluded_mounts = [
+      "nobrowse",
+      "read-only",
+      "ro"
+    ]
+
     system_info = Vmstat.snapshot
+    mounts = Sys::Filesystem.mounts
+
+    @disks = []
+    mounts.each do |mount|
+      options = mount.options.split(', ')
+
+      next unless excluded_mounts.each { |em| break if options.include?(em) }
+
+      disk = Sys::Filesystem.stat(mount.mount_point)
+      @disks.push({
+          bytes_total: disk.bytes_total,
+          bytes_used:  disk.bytes_used,
+          disk_name:   mount.name,
+          mount_path:  disk.path
+      })
+    end
 
     @cpus = system_info.cpus.length
 
     @mem_used = system_info.memory.active_bytes
     @mem_total = system_info.memory.total_bytes
-
-    @disk_used = system_info.disks[0].used_bytes
-    @disk_total = system_info.disks[0].total_bytes
   end
 end

app/views/admin/system_info/show.html.haml

@@ -17,6 +17,9 @@
           %h1= "#{number_to_human_size(@mem_used)} / #{number_to_human_size(@mem_total)}"
     .col-sm-4
       .light-well
-        %h4 Disk
+        %h4 Disks
         .data
-          %h1= "#{number_to_human_size(@disk_used)} / #{number_to_human_size(@disk_total)}"
+          - @disks.each do |disk|
+            %h1= "#{number_to_human_size(disk[:bytes_used])} / #{number_to_human_size(disk[:bytes_total])}"
+            %p= "#{disk[:disk_name]}"
+            %p= "#{disk[:mount_path]}"

config/dependency_decisions.yml

@@ -181,3 +181,9 @@
     :why: Equivalent to LGPLv2
     :versions: []
     :when: 2016-06-07 17:14:10.907682000 Z
+- - :whitelist
+  - Artistic 2.0
+  - :who: Josh Frye
+    :why: Disk/mount information display on Admin pages
+    :versions: []
+    :when: 2016-06-29 16:32:45.432113000 Z

spec/features/admin/admin_system_info_spec.rb

@@ -11,7 +11,7 @@ describe 'Admin System Info' do
 
       expect(page).to have_content 'CPU'
       expect(page).to have_content 'Memory'
-      expect(page).to have_content 'Disk'
+      expect(page).to have_content 'Disks'
     end
   end
 end