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
|
package sysinfo // import "github.com/docker/docker/pkg/sysinfo"
import (
"context"
"os"
"path"
"strings"
"github.com/containerd/cgroups/v3"
cgroupsV2 "github.com/containerd/cgroups/v3/cgroup2"
"github.com/containerd/log"
"github.com/moby/sys/userns"
)
func newV2(options ...Opt) *SysInfo {
sysInfo := &SysInfo{
CgroupUnified: true,
cg2GroupPath: "/",
}
for _, o := range options {
o(sysInfo)
}
ops := []infoCollector{
applyNetworkingInfo,
applyAppArmorInfo,
applySeccompInfo,
applyCgroupNsInfo,
}
m, err := cgroupsV2.Load(sysInfo.cg2GroupPath)
if err != nil {
log.G(context.TODO()).Warn(err)
} else {
sysInfo.cg2Controllers = make(map[string]struct{})
controllers, err := m.Controllers()
if err != nil {
log.G(context.TODO()).Warn(err)
}
for _, c := range controllers {
sysInfo.cg2Controllers[c] = struct{}{}
}
ops = append(ops,
applyMemoryCgroupInfoV2,
applyCPUCgroupInfoV2,
applyIOCgroupInfoV2,
applyCPUSetCgroupInfoV2,
applyPIDSCgroupInfoV2,
applyDevicesCgroupInfoV2,
)
}
for _, o := range ops {
o(sysInfo)
}
return sysInfo
}
func getSwapLimitV2() bool {
_, g, err := cgroups.ParseCgroupFileUnified("/proc/self/cgroup")
if err != nil {
return false
}
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) {
if _, ok := info.cg2Controllers["memory"]; !ok {
info.Warnings = append(info.Warnings, "Unable to find memory controller")
return
}
info.MemoryLimit = true
info.SwapLimit = getSwapLimitV2()
info.MemoryReservation = true
info.OomKillDisable = false
info.MemorySwappiness = false
info.KernelMemory = false
info.KernelMemoryTCP = false
}
func applyCPUCgroupInfoV2(info *SysInfo) {
if _, ok := info.cg2Controllers["cpu"]; !ok {
info.Warnings = append(info.Warnings, "Unable to find cpu controller")
return
}
info.CPUShares = true
info.CPUCfs = true
info.CPURealtime = false
}
func applyIOCgroupInfoV2(info *SysInfo) {
if _, ok := info.cg2Controllers["io"]; !ok {
info.Warnings = append(info.Warnings, "Unable to find io controller")
return
}
info.BlkioWeight = true
info.BlkioWeightDevice = true
info.BlkioReadBpsDevice = true
info.BlkioWriteBpsDevice = true
info.BlkioReadIOpsDevice = true
info.BlkioWriteIOpsDevice = true
}
func applyCPUSetCgroupInfoV2(info *SysInfo) {
if _, ok := info.cg2Controllers["cpuset"]; !ok {
info.Warnings = append(info.Warnings, "Unable to find cpuset controller")
return
}
info.Cpuset = true
cpus, err := os.ReadFile(path.Join("/sys/fs/cgroup", info.cg2GroupPath, "cpuset.cpus.effective"))
if err != nil {
return
}
info.Cpus = strings.TrimSpace(string(cpus))
mems, err := os.ReadFile(path.Join("/sys/fs/cgroup", info.cg2GroupPath, "cpuset.mems.effective"))
if err != nil {
return
}
info.Mems = strings.TrimSpace(string(mems))
}
func applyPIDSCgroupInfoV2(info *SysInfo) {
if _, ok := info.cg2Controllers["pids"]; !ok {
info.Warnings = append(info.Warnings, "Unable to find pids controller")
return
}
info.PidsLimit = true
}
func applyDevicesCgroupInfoV2(info *SysInfo) {
info.CgroupDevicesEnabled = !userns.RunningInUserNS()
}
|
