func TestGetUsage(t *testing.T) {
// Need Root permission
/* err := exec.Command(LXC_START_COMMAND, "-d", "--name", "test_cpu_container", "/usr/bin/sleep 10").Run() */
/* if err != nil { */
/* t.Fatal("Please install", LXC_START_COMMAND, err) */
/* } */
containers, err := lxc.ListContainers()
if err != nil {
t.Fatal(err)
}
if len(containers) == 0 {
t.Log("There isn't any existing container, please create one")
t.Log("Example : ")
t.Log("\t# lxc-start -d --name test_cpu_container /usr/bin/sleep 10")
t.FailNow()
}
go Monitor()
time.Sleep(2 * time.Second)
cpuUsage := GetUsage(containers[0])
if cpuUsage < 0 || cpuUsage > 100 {
t.Fatal("CPU usage out of [0,100]")
}
}
func Monitor() {
tick := time.NewTicker(REFRESH_TIME * time.Second)
for {
<-tick.C
for k, v := range cpuUsages {
previousCpuUsages[k] = v
}
containers, err := lxc.ListContainers()
if err != nil {
log.Println(err)
continue
}
for _, container := range containers {
n, err := cpuacctUsage(container)
if err != nil {
log.Println(err)
}
cpuUsages[container] = n
}
}
}