// Small wrapper to handle errors on open
func FileLineChannel(fpath string) <-chan string {
c, err := filechan.FileLineChannel(fpath)
if err != nil {
FatalError(slog.Context{"fn": "FileLineChannel", "fpath": fpath}, err, "creating FileLineChannel")
}
return c
}
func (poller Cgroup) Poll(tick time.Time) {
for _, cgroup := range poller.cgroups {
// I can't use the FileLineChannel in utils.go here because I
// don't want to raise a fatal error if the cgroup doesn't exist yet.
cpuStat, err := filechan.FileLineChannel(CGROUPS_PATH + "/cpuacct/" + cgroup + "/cpuacct.stat")
if err == nil {
for line := range cpuStat {
poller.handlePercentCpu(line, tick, cgroup)
}
}
poller.handleMaxMemory("user", "memory.max_usage_in_bytes", tick, cgroup)
poller.handleMaxMemory("kernel", "memory.kmem.max_usage_in_bytes", tick, cgroup)
poller.handleMaxMemory("kernel.tcp", "memory.kmem.tcp.max_usage_in_bytes", tick, cgroup)
}
}
