Add support for Linux MemAvailable

Signed-off-by: Dzmitry Pasiukevich <dpasiukevich@gmail.com>

2 files changed, 8 insertions, 0 deletions

diff --git a/lib/ohai/plugins/linux/memory.rb b/lib/ohai/plugins/linux/memory.rb
index 144ad9d7..03d8057c 100644
--- a/lib/ohai/plugins/linux/memory.rb
+++ b/lib/ohai/plugins/linux/memory.rb
@@ -30,6 +30,8 @@ Ohai.plugin(:Memory) do
         memory[:total] = "#{$1}#{$2}"
       when /^MemFree:\s+(\d+) (.+)$/
         memory[:free] = "#{$1}#{$2}"
+      when /^MemAvailable:\s+(\d+) (.+)$/
+        memory[:available] = "#{$1}#{$2}"
       when /^Buffers:\s+(\d+) (.+)$/
         memory[:buffers] = "#{$1}#{$2}"
       when /^Cached:\s+(\d+) (.+)$/
diff --git a/spec/unit/plugins/linux/memory_spec.rb b/spec/unit/plugins/linux/memory_spec.rb
index e3a281ea..5859edd1 100644
--- a/spec/unit/plugins/linux/memory_spec.rb
+++ b/spec/unit/plugins/linux/memory_spec.rb
@@ -24,6 +24,7 @@ describe Ohai::System, "Linux memory plugin" do
     allow(@double_file).to receive(:each).
       and_yield("MemTotal:     131932120 kB").
       and_yield("MemFree:       2269032 kB").
+      and_yield("MemAvailable:  9208922 kB").
       and_yield("Buffers:        646368 kB").
       and_yield("Cached:       32346556 kB").
       and_yield("SwapCached:        312 kB").
@@ -68,6 +69,11 @@ describe Ohai::System, "Linux memory plugin" do
     expect(@plugin[:memory][:free]).to eql("2269032kB")
   end
 
+  it "should get available memory" do
+    @plugin.run
+    expect(@plugin[:memory][:available]).to eql("9208922kB")
+  end
+
   it "should get memory used for file buffers" do
     @plugin.run
     expect(@plugin[:memory][:buffers]).to eql("646368kB")