mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-11-21 14:44:00 +00:00
47 lines
1.5 KiB
Go
47 lines
1.5 KiB
Go
package cgroup
|
|
|
|
import (
|
|
"strconv"
|
|
)
|
|
|
|
// GetMemoryLimit returns cgroup memory limit
|
|
func GetMemoryLimit() int64 {
|
|
// Try determining the amount of memory inside docker container.
|
|
// See https://stackoverflow.com/questions/42187085/check-mem-limit-within-a-docker-container
|
|
//
|
|
// Read memory limit according to https://unix.stackexchange.com/questions/242718/how-to-find-out-how-much-memory-lxc-container-is-allowed-to-consume
|
|
// This should properly determine the limit inside lxc container.
|
|
// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/84
|
|
n, err := getMemStat("memory.limit_in_bytes")
|
|
if err != nil {
|
|
return 0
|
|
}
|
|
return n
|
|
}
|
|
|
|
func getMemStat(statName string) (int64, error) {
|
|
return getStatGeneric(statName, "/sys/fs/cgroup/memory", "/proc/self/cgroup", "memory")
|
|
}
|
|
|
|
// GetHierarchicalMemoryLimit returns hierarchical memory limit
|
|
// https://www.kernel.org/doc/Documentation/cgroup-v1/memory.txt
|
|
func GetHierarchicalMemoryLimit() int64 {
|
|
// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/699
|
|
n, err := getHierarchicalMemoryLimit("/sys/fs/cgroup/memory", "/proc/self/cgroup")
|
|
if err != nil {
|
|
return 0
|
|
}
|
|
return n
|
|
}
|
|
|
|
func getHierarchicalMemoryLimit(sysfsPrefix, cgroupPath string) (int64, error) {
|
|
data, err := getFileContents("memory.stat", sysfsPrefix, cgroupPath, "memory")
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
memStat, err := grepFirstMatch(data, "hierarchical_memory_limit", 1, " ")
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
return strconv.ParseInt(memStat, 10, 64)
|
|
}
|