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
|
// SPDX-License-Identifier: GPL-3.0-or-later
//go:build linux
// +build linux
package systemdunits
import (
"context"
"fmt"
"strconv"
"strings"
"github.com/coreos/go-systemd/v22/dbus"
)
const (
// https://www.freedesktop.org/software/systemd/man/systemd.html
unitStateActive = "active"
unitStateInactive = "inactive"
unitStateActivating = "activating"
unitStateDeactivating = "deactivating"
unitStateFailed = "failed"
)
var unitStates = []string{
unitStateActive,
unitStateActivating,
unitStateFailed,
unitStateInactive,
unitStateDeactivating,
}
func (s *SystemdUnits) collectUnits(mx map[string]int64, conn systemdConnection) error {
var units []dbus.UnitStatus
var err error
if s.systemdVersion >= 230 {
// https://github.com/systemd/systemd/pull/3142
units, err = s.getLoadedUnitsByPatterns(conn)
} else {
units, err = s.getLoadedUnits(conn)
}
if err != nil {
return err
}
seen := make(map[string]bool)
for _, unit := range units {
name, typ, ok := extractUnitNameType(unit.Name)
if !ok {
continue
}
seen[unit.Name] = true
if !s.seenUnits[unit.Name] {
s.seenUnits[unit.Name] = true
s.addUnitCharts(name, typ)
}
for _, s := range unitStates {
mx[fmt.Sprintf("unit_%s_%s_state_%s", name, typ, s)] = 0
}
mx[fmt.Sprintf("unit_%s_%s_state_%s", name, typ, unit.ActiveState)] = 1
}
for k := range s.seenUnits {
if !seen[k] {
delete(s.seenUnits, k)
if name, typ, ok := extractUnitNameType(k); ok {
s.removeUnitCharts(name, typ)
}
}
}
return nil
}
func (s *SystemdUnits) getLoadedUnits(conn systemdConnection) ([]dbus.UnitStatus, error) {
ctx, cancel := context.WithTimeout(context.Background(), s.Timeout.Duration())
defer cancel()
s.Debugf("calling function 'ListUnits'")
units, err := conn.ListUnitsContext(ctx)
if err != nil {
return nil, fmt.Errorf("error on ListUnits: %v", err)
}
for i := range units {
units[i].Name = cleanUnitName(units[i].Name)
}
loaded := units[:0]
for _, unit := range units {
if unit.LoadState == "loaded" && s.unitSr.MatchString(unit.Name) {
loaded = append(loaded, unit)
}
}
s.Debugf("got total/loaded %d/%d units", len(units), len(loaded))
return loaded, nil
}
func (s *SystemdUnits) getLoadedUnitsByPatterns(conn systemdConnection) ([]dbus.UnitStatus, error) {
ctx, cancel := context.WithTimeout(context.Background(), s.Timeout.Duration())
defer cancel()
s.Debugf("calling function 'ListUnitsByPatterns'")
units, err := conn.ListUnitsByPatternsContext(ctx, unitStates, s.Include)
if err != nil {
return nil, fmt.Errorf("error on ListUnitsByPatterns: %v", err)
}
for i := range units {
units[i].Name = cleanUnitName(units[i].Name)
}
loaded := units[:0]
for _, unit := range units {
if unit.LoadState == "loaded" {
loaded = append(loaded, unit)
}
}
s.Debugf("got total/loaded %d/%d units", len(units), len(loaded))
return loaded, nil
}
func extractUnitNameType(name string) (string, string, bool) {
idx := strings.LastIndexByte(name, '.')
if idx <= 0 {
return "", "", false
}
return name[:idx], name[idx+1:], true
}
func cleanUnitName(name string) string {
// dev-disk-by\x2duuid-DE44\x2dCEE0.device => dev-disk-by-uuid-DE44-CEE0.device
if strings.IndexByte(name, '\\') == -1 {
return name
}
v, err := strconv.Unquote("\"" + name + "\"")
if err != nil {
return name
}
return v
}
|
