containerd
Example usage in container
Hi,
sorry for creating an issue but I didn't know where to ask a quesiton.
Can this library be used in a running container to get cgroups memory limits? I would like to get value of /sys/fs/cgroup/memory/memory.limit_in_bytes. Probably it's not safe to read that file directly hence I would like to use this lib to get the memory_limit_in_bytes.
How should be the cgroups created?
control, err := cgroups.Load(cgroups.V1, cgroups.NestedPath("")) //always error
Creating it by PID does not work either as the os.Getpid() returns 1 in the container.
The reason I am looking into this is to get total memory inside a running container.
func SysTotalMemory() uint64 {
in := &syscall.Sysinfo_t{}
err := syscall.Sysinfo(in)
if err != nil {
return 0
}
// If this is a 32-bit system, then these fields are
// uint32 instead of uint64.
// So we always convert to uint64 to match signature.
return uint64(in.Totalram) * uint64(in.Unit)
}
returns the total host memory
I would like to get value of
/sys/fs/cgroup/memory/memory.limit_in_bytes.
You should just use cgroups.RootPath instead of cgroups.NestedPath("") then.
