Add cadvisor version to VersionInfo.

Docker-DCO-1.1-Signed-off-by: Rohit Jnagal <jnagal@google.com> (github: rjnagal)

info/machine.go

@@ -31,6 +31,9 @@ type VersionInfo struct {
 
 	// Docker version.
 	DockerVersion string `json:"docker_version"`
+
+	// cAdvisor version.
+	CadvisorVersion string `json:"cadvisor_version"`
 }
 
 type MachineInfoFactory interface {

manager/machine.go

@@ -75,6 +75,7 @@ func getVersionInfo() (*info.VersionInfo, error) {
 		KernelVersion:      kernel_version,
 		ContainerOsVersion: container_os,
 		DockerVersion:      docker_version,
+		CadvisorVersion:    info.VERSION,
 	}, nil
 }