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Fix docker stats to make it work on centos 7. #180

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Fix docker stats to make it work on centos 7. #180

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18 changes: 14 additions & 4 deletions plugins/system/ps/docker/docker_linux.go
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@ package docker

import (
"encoding/json"
"os"
"os/exec"
"path"
"strconv"
Expand Down Expand Up @@ -48,9 +49,13 @@ func CgroupCPU(containerid string, base string) (*cpu.CPUTimesStat, error) {
if len(base) == 0 {
base = "/sys/fs/cgroup/cpuacct/docker"
}
path := path.Join(base, containerid, "cpuacct.stat")
statfile := path.Join(base, containerid, "cpuacct.stat")

lines, err := common.ReadLines(path)
if _, err := os.Stat(statfile); os.IsNotExist(err) {
statfile = path.Join("/sys/fs/cgroup/cpuacct/system.slice", "docker-" + containerid + ".scope", "cpuacct.stat")
}

lines, err := common.ReadLines(statfile)
if err != nil {
return nil, err
}
Expand Down Expand Up @@ -86,12 +91,17 @@ func CgroupMem(containerid string, base string) (*CgroupMemStat, error) {
if len(base) == 0 {
base = "/sys/fs/cgroup/memory/docker"
}
path := path.Join(base, containerid, "memory.stat")
statfile := path.Join(base, containerid, "memory.stat")

if _, err := os.Stat(statfile); os.IsNotExist(err) {
statfile = path.Join("/sys/fs/cgroup/memory/system.slice", "docker-" + containerid + ".scope", "memory.stat")
}

// empty containerid means all cgroup
if len(containerid) == 0 {
containerid = "all"
}
lines, err := common.ReadLines(path)
lines, err := common.ReadLines(statfile)
if err != nil {
return nil, err
}
Expand Down