kubelet scale down

Platform services configuration were changed in order to consume
minimal resources by limiting number of threads/workers to the
minimum value based on kubelet service documentation

TEST PLAN:
PASS: build a new Debian ISO.
PASS: AIO: SX|DX|DX+: Install, bootstrap and perform a host-unlock
verifying that GOMAXPROCS is following the correct scalability set
parameter.
PASS: STD: Install, bootstrap and perform a host-unlock verifying
that GOMAXPROCS is following the correct scalability set parameter.
PASS: Single-core for scale-down testing.
PASS: Increased cores for scale-up testing.

Story: 2010087
Task: 45704
Change-Id: Ib4962e2c34542a443059d4d80684f3f88f5492a3
Signed-off-by: Thiago Antonio Miranda <tmarques@windriver.com>

puppet-manifests/src/modules/platform/manifests/kubernetes.pp

@@ -564,9 +564,23 @@ class platform::kubernetes::worker
 class platform::kubernetes::aio
   inherits ::platform::kubernetes::params {
 
+  include ::platform::params
   include ::platform::kubernetes::master
   include ::platform::kubernetes::worker
 
+  if $::platform::params::distributed_cloud_role != 'systemcontroller' {
+    $kubelet_max_procs = $::platform::params::eng_workers
+
+    # Set kubelet GOMAXPROCS environment variable
+    file { '/etc/systemd/system/kubelet.service.d/kubelet-max-procs.conf':
+      ensure  => file,
+      content => template('platform/kubelet-max-procs.conf.erb'),
+      owner   => 'root',
+      group   => 'root',
+      mode    => '0644',
+    }
+  }
+
   Class['::platform::kubernetes::master']
   -> Class['::platform::kubernetes::worker']
   -> Class[$name]

puppet-manifests/src/modules/platform/templates/kubelet-max-procs.conf.erb

@@ -0,0 +1,2 @@
+[Service]
+Environment="GOMAXPROCS=<%= @kubelet_max_procs %>"