Ethtool support for HCO

Change-Id: Ied5c05776e68625951b130b817966fb0777a6892

airship-host-config/scripts/ethtool.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+set -e
+echo script name: ${BASH_SOURCE[0]}
+eth=`which ethtool`
+echo command: $eth $@
+$eth $@

demo_examples/example_ethtool.yaml

@@ -0,0 +1,19 @@
+# In this example we are executing sample ethtool
+# script on kubernetes host using exec config.
+
+apiVersion: hostconfig.airshipit.org/v1alpha1
+kind: HostConfig
+metadata:
+  name: example-exec-ethtool
+spec:
+  host_groups:
+   - name: "kubernetes.io/role"
+     values:
+      - "master"
+      - "worker"
+  config:
+    exec:
+      - name: ethtool.sh
+        args: "-h"
+      - name: ethtool.sh
+        args: "--version"

tools/deployment/50_test_hostconfig_cr.sh

@@ -127,3 +127,7 @@ check_status example7 '[ "hostconfig-control-plane", "hostconfig-control-plane2"
 # Executing sample sysctl and ulimit configuration on the kubernetes nodes
 kubectl apply -f $AIRSHIP_HOSTCONFIG/demo_examples/example_sysctl_ulimit.yaml
 check_status example8 '[ "hostconfig-control-plane", "hostconfig-control-plane2", "hostconfig-control-plane3" ]' false
+
+# Executing sample ethtool commands on the kubernetes nodes
+kubectl apply -f $AIRSHIP_HOSTCONFIG/demo_examples/example_ethtool.yaml
+check_status example-exec-ethtool '[ "hostconfig-control-plane", "hostconfig-control-plane2", "hostconfig-control-plane3", "hostconfig-worker", "hostconfig-worker2" ]' false