1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
package sysinfo // import "github.com/docker/docker/pkg/sysinfo"
import (
"os"
"path"
"strings"
cgroupsV2 "github.com/containerd/cgroups/v2"
"github.com/containerd/containerd/sys"
"github.com/opencontainers/runc/libcontainer/cgroups"
"github.com/sirupsen/logrus"
)
type infoCollectorV2 func(info *SysInfo, controllers map[string]struct{}, dirPath string) (warnings []string)
func newV2(quiet bool, opts *opts) *SysInfo {
var warnings []string
sysInfo := &SysInfo{
CgroupUnified: true,
}
g := opts.cg2GroupPath
if g == "" {
g = "/"
}
m, err := cgroupsV2.LoadManager("/sys/fs/cgroup", g)
if err != nil {
logrus.Warn(err)
} else {
controllersM := make(map[string]struct{})
controllers, err := m.Controllers()
if err != nil {
logrus.Warn(err)
}
for _, c := range controllers {
controllersM[c] = struct{}{}
}
opsV2 := []infoCollectorV2{
applyMemoryCgroupInfoV2,
applyCPUCgroupInfoV2,
applyIOCgroupInfoV2,
applyCPUSetCgroupInfoV2,
applyPIDSCgroupInfoV2,
applyDevicesCgroupInfoV2,
}
dirPath := path.Join("/sys/fs/cgroup", path.Clean(g))
for _, o := range opsV2 {
w := o(sysInfo, controllersM, dirPath)
warnings = append(warnings, w...)
}
}
ops := []infoCollector{
applyNetworkingInfo,
applyAppArmorInfo,
applySeccompInfo,
applyCgroupNsInfo,
}
for _, o := range ops {
w := o(sysInfo, nil)
warnings = append(warnings, w...)
}
if !quiet {
for _, w := range warnings {
logrus.Warn(w)
}
}
return sysInfo
}
func getSwapLimitV2() bool {
groups, err := cgroups.ParseCgroupFile("/proc/self/cgroup")
if err != nil {
return false
}
g := groups[""]
if g == "" {
return false
}
cGroupPath := path.Join("/sys/fs/cgroup", g, "memory.swap.max")
if _, err = os.Stat(cGroupPath); os.IsNotExist(err) {
return false
}
return true
}
func applyMemoryCgroupInfoV2(info *SysInfo, controllers map[string]struct{}, _ string) []string {
var warnings []string
if _, ok := controllers["memory"]; !ok {
warnings = append(warnings, "Unable to find memory controller")
return warnings
}
info.MemoryLimit = true
info.SwapLimit = getSwapLimitV2()
info.MemoryReservation = true
info.OomKillDisable = false
info.MemorySwappiness = false
info.KernelMemory = false
info.KernelMemoryTCP = false
return warnings
}
func applyCPUCgroupInfoV2(info *SysInfo, controllers map[string]struct{}, _ string) []string {
var warnings []string
if _, ok := controllers["cpu"]; !ok {
warnings = append(warnings, "Unable to find cpu controller")
return warnings
}
info.CPUShares = true
info.CPUCfs = true
info.CPURealtime = false
return warnings
}
func applyIOCgroupInfoV2(info *SysInfo, controllers map[string]struct{}, _ string) []string {
var warnings []string
if _, ok := controllers["io"]; !ok {
warnings = append(warnings, "Unable to find io controller")
return warnings
}
info.BlkioWeight = true
info.BlkioWeightDevice = true
info.BlkioReadBpsDevice = true
info.BlkioWriteBpsDevice = true
info.BlkioReadIOpsDevice = true
info.BlkioWriteIOpsDevice = true
return warnings
}
func applyCPUSetCgroupInfoV2(info *SysInfo, controllers map[string]struct{}, dirPath string) []string {
var warnings []string
if _, ok := controllers["cpuset"]; !ok {
warnings = append(warnings, "Unable to find cpuset controller")
return warnings
}
info.Cpuset = true
cpus, err := os.ReadFile(path.Join(dirPath, "cpuset.cpus.effective"))
if err != nil {
return warnings
}
info.Cpus = strings.TrimSpace(string(cpus))
mems, err := os.ReadFile(path.Join(dirPath, "cpuset.mems.effective"))
if err != nil {
return warnings
}
info.Mems = strings.TrimSpace(string(mems))
return warnings
}
func applyPIDSCgroupInfoV2(info *SysInfo, controllers map[string]struct{}, _ string) []string {
var warnings []string
if _, ok := controllers["pids"]; !ok {
warnings = append(warnings, "Unable to find pids controller")
return warnings
}
info.PidsLimit = true
return warnings
}
func applyDevicesCgroupInfoV2(info *SysInfo, controllers map[string]struct{}, _ string) []string {
info.CgroupDevicesEnabled = !sys.RunningInUserNS()
return nil
}
|
