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pkg/sysinfo: move cg2GroupPath to be a field in SysInfo 

We pass the SysInfo struct to all functions. Adding cg2GroupPath as a
(non-exported) field makes passing around this information easier.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn 2021-07-14 14:52:30 +02:00
parent e70c5ea1a9
commit ca27b473cc
No known key found for this signature in database
GPG Key ID: 76698F39D527CE8C
2 changed files with 14 additions and 11 deletions
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22
pkg/sysinfo/cgroup2_linux.go
View File

@ -12,7 +12,7 @@ import (
"github.com/sirupsen/logrus" "github.com/sirupsen/logrus"
) )
type infoCollectorV2 func(info *SysInfo, controllers map[string]struct{}, dirPath string) (warnings []string) type infoCollectorV2 func(info *SysInfo, controllers map[string]struct{}) (warnings []string)
func newV2(quiet bool, options ...Opt) *SysInfo { func newV2(quiet bool, options ...Opt) *SysInfo {
var warnings []string var warnings []string
@ -27,6 +27,7 @@ func newV2(quiet bool, options ...Opt) *SysInfo {
if g == "" { if g == "" {
g = "/" g = "/"
} }
sysInfo.cg2GroupPath = g
m, err := cgroupsV2.LoadManager("/sys/fs/cgroup", g) m, err := cgroupsV2.LoadManager("/sys/fs/cgroup", g)
if err != nil { if err != nil {
logrus.Warn(err) logrus.Warn(err)
@ -47,9 +48,8 @@ func newV2(quiet bool, options ...Opt) *SysInfo {
applyPIDSCgroupInfoV2, applyPIDSCgroupInfoV2,
applyDevicesCgroupInfoV2, applyDevicesCgroupInfoV2,
} }
dirPath := path.Join("/sys/fs/cgroup", g)
for _, o := range opsV2 { for _, o := range opsV2 {
w := o(sysInfo, controllersM, dirPath) w := o(sysInfo, controllersM)
warnings = append(warnings, w...) warnings = append(warnings, w...)
} }
} }
@ -90,7 +90,7 @@ func getSwapLimitV2() bool {
return true return true
} }
func applyMemoryCgroupInfoV2(info *SysInfo, controllers map[string]struct{}, _ string) []string { func applyMemoryCgroupInfoV2(info *SysInfo, controllers map[string]struct{}) []string {
var warnings []string var warnings []string
if _, ok := controllers["memory"]; !ok { if _, ok := controllers["memory"]; !ok {
warnings = append(warnings, "Unable to find memory controller") warnings = append(warnings, "Unable to find memory controller")
@ -107,7 +107,7 @@ func applyMemoryCgroupInfoV2(info *SysInfo, controllers map[string]struct{}, _ s
return warnings return warnings
} }
func applyCPUCgroupInfoV2(info *SysInfo, controllers map[string]struct{}, _ string) []string { func applyCPUCgroupInfoV2(info *SysInfo, controllers map[string]struct{}) []string {
var warnings []string var warnings []string
if _, ok := controllers["cpu"]; !ok { if _, ok := controllers["cpu"]; !ok {
warnings = append(warnings, "Unable to find cpu controller") warnings = append(warnings, "Unable to find cpu controller")
@ -119,7 +119,7 @@ func applyCPUCgroupInfoV2(info *SysInfo, controllers map[string]struct{}, _ stri
return warnings return warnings
} }
func applyIOCgroupInfoV2(info *SysInfo, controllers map[string]struct{}, _ string) []string { func applyIOCgroupInfoV2(info *SysInfo, controllers map[string]struct{}) []string {
var warnings []string var warnings []string
if _, ok := controllers["io"]; !ok { if _, ok := controllers["io"]; !ok {
warnings = append(warnings, "Unable to find io controller") warnings = append(warnings, "Unable to find io controller")
@ -135,7 +135,7 @@ func applyIOCgroupInfoV2(info *SysInfo, controllers map[string]struct{}, _ strin
return warnings return warnings
} }
func applyCPUSetCgroupInfoV2(info *SysInfo, controllers map[string]struct{}, dirPath string) []string { func applyCPUSetCgroupInfoV2(info *SysInfo, controllers map[string]struct{}) []string {
var warnings []string var warnings []string
if _, ok := controllers["cpuset"]; !ok { if _, ok := controllers["cpuset"]; !ok {
warnings = append(warnings, "Unable to find cpuset controller") warnings = append(warnings, "Unable to find cpuset controller")
@ -143,13 +143,13 @@ func applyCPUSetCgroupInfoV2(info *SysInfo, controllers map[string]struct{}, dir
} }
info.Cpuset = true info.Cpuset = true
cpus, err := ioutil.ReadFile(path.Join(dirPath, "cpuset.cpus.effective")) cpus, err := ioutil.ReadFile(path.Join("/sys/fs/cgroup", info.cg2GroupPath, "cpuset.cpus.effective"))
if err != nil { if err != nil {
return warnings return warnings
} }
info.Cpus = strings.TrimSpace(string(cpus)) info.Cpus = strings.TrimSpace(string(cpus))
mems, err := ioutil.ReadFile(path.Join(dirPath, "cpuset.mems.effective")) mems, err := ioutil.ReadFile(path.Join("/sys/fs/cgroup", info.cg2GroupPath, "cpuset.mems.effective"))
if err != nil { if err != nil {
return warnings return warnings
} }
@ -157,7 +157,7 @@ func applyCPUSetCgroupInfoV2(info *SysInfo, controllers map[string]struct{}, dir
return warnings return warnings
} }
func applyPIDSCgroupInfoV2(info *SysInfo, controllers map[string]struct{}, _ string) []string { func applyPIDSCgroupInfoV2(info *SysInfo, controllers map[string]struct{}) []string {
var warnings []string var warnings []string
if _, ok := controllers["pids"]; !ok { if _, ok := controllers["pids"]; !ok {
warnings = append(warnings, "Unable to find pids controller") warnings = append(warnings, "Unable to find pids controller")
@ -167,7 +167,7 @@ func applyPIDSCgroupInfoV2(info *SysInfo, controllers map[string]struct{}, _ str
return warnings return warnings
} }
func applyDevicesCgroupInfoV2(info *SysInfo, controllers map[string]struct{}, _ string) []string { func applyDevicesCgroupInfoV2(info *SysInfo, controllers map[string]struct{}) []string {
info.CgroupDevicesEnabled = !userns.RunningInUserNS() info.CgroupDevicesEnabled = !userns.RunningInUserNS()
return nil return nil
} }

3
pkg/sysinfo/sysinfo.go
View File

@ -37,6 +37,9 @@ type SysInfo struct {
// cgMounts is the list of cgroup v1 mount paths, indexed by subsystem, to // cgMounts is the list of cgroup v1 mount paths, indexed by subsystem, to
// inspect availability of subsystems. // inspect availability of subsystems.
cgMounts map[string]string cgMounts map[string]string
// cg2GroupPath is the cgroup v2 group path to inspect availability of the controllers.
cg2GroupPath string
} }
type cgroupMemInfo struct { type cgroupMemInfo struct {