node: cpu-mgr: Add logs on the happy path

While debugging, it can be useful to have logs to indicate that
things have gone as expected especially when it comes to
important events like successful startup of CPU manager
and successful allocation of resources.

Signed-off-by: Swati Sehgal <swsehgal@redhat.com>

pkg/kubelet/cm/cpumanager/cpu_manager.go

@@ -239,6 +239,8 @@ func (m *manager) Start(activePods ActivePodsFunc, sourcesReady config.SourcesRe
 		return err
 	}
 
+	klog.V(4).InfoS("CPU manager started", "policy", m.policy.Name())
+
 	m.allocatableCPUs = m.policy.GetAllocatableCPUs(m.state)
 
 	if m.policy.Name() == string(PolicyNone) {

pkg/kubelet/cm/cpumanager/policy_static.go

@@ -388,6 +388,7 @@ func (p *staticPolicy) Allocate(s state.State, pod *v1.Pod, container *v1.Contai
 	p.updateCPUsToReuse(pod, container, cpuset)
 	p.updateMetricsOnAllocate(cpuset)
 
+	klog.V(4).InfoS("Allocated exclusive CPUs", "pod", klog.KObj(pod), "containerName", container.Name, "cpuset", cpuset)
 	return nil
 }