summaryrefslogtreecommitdiff
path: root/libpod/info.go
blob: 8d411f0d49c510712a557c2bf70171ff0fc66c40 (plain)
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
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
package libpod

import (
	"bufio"
	"bytes"
	"fmt"
	"io/ioutil"
	"os"
	"os/exec"
	"runtime"
	"strconv"
	"strings"
	"time"

	"github.com/containers/buildah"
	"github.com/containers/libpod/pkg/cgroups"
	"github.com/containers/libpod/pkg/rootless"
	"github.com/containers/storage"
	"github.com/containers/storage/pkg/system"
	"github.com/pkg/errors"
	"github.com/sirupsen/logrus"
)

// top-level "host" info
func (r *Runtime) hostInfo() (map[string]interface{}, error) {
	// lets say OS, arch, number of cpus, amount of memory, maybe os distribution/version, hostname, kernel version, uptime
	info := map[string]interface{}{}
	info["os"] = runtime.GOOS
	info["arch"] = runtime.GOARCH
	info["cpus"] = runtime.NumCPU()
	info["rootless"] = rootless.IsRootless()
	unified, err := cgroups.IsCgroup2UnifiedMode()
	if err != nil {
		return nil, errors.Wrapf(err, "error reading cgroups mode")
	}
	cgroupVersion := "v1"
	if unified {
		cgroupVersion = "v2"
	}
	info["CgroupVersion"] = cgroupVersion
	mi, err := system.ReadMemInfo()
	if err != nil {
		return nil, errors.Wrapf(err, "error reading memory info")
	}
	// TODO this might be a place for github.com/dustin/go-humanize
	info["MemTotal"] = mi.MemTotal
	info["MemFree"] = mi.MemFree
	info["SwapTotal"] = mi.SwapTotal
	info["SwapFree"] = mi.SwapFree
	hostDistributionInfo := r.GetHostDistributionInfo()
	if rootless.IsRootless() {
		if path, err := exec.LookPath("slirp4netns"); err == nil {
			logrus.Warnf("Failed to retrieve program version for %s: %v", path, err)
			version, err := programVersion(path)
			if err != nil {
				logrus.Warnf("Failed to retrieve program version for %s: %v", path, err)
			}
			program := map[string]interface{}{}
			program["Executable"] = path
			program["Version"] = version
			program["Package"] = packageVersion(path)
			info["slirp4netns"] = program
		}
		uidmappings, err := rootless.ReadMappingsProc("/proc/self/uid_map")
		if err != nil {
			return nil, errors.Wrapf(err, "error reading uid mappings")
		}
		gidmappings, err := rootless.ReadMappingsProc("/proc/self/gid_map")
		if err != nil {
			return nil, errors.Wrapf(err, "error reading gid mappings")
		}
		idmappings := make(map[string]interface{})
		idmappings["uidmap"] = uidmappings
		idmappings["gidmap"] = gidmappings
		info["IDMappings"] = idmappings
	}
	info["Distribution"] = map[string]interface{}{
		"distribution": hostDistributionInfo["Distribution"],
		"version":      hostDistributionInfo["Version"],
	}
	info["BuildahVersion"] = buildah.Version
	kv, err := readKernelVersion()
	if err != nil {
		return nil, errors.Wrapf(err, "error reading kernel version")
	}
	info["kernel"] = kv

	runtimeInfo, err := r.defaultOCIRuntime.RuntimeInfo()
	if err != nil {
		logrus.Errorf("Error getting info on OCI runtime %s: %v", r.defaultOCIRuntime.Name(), err)
	} else {
		for k, v := range runtimeInfo {
			info[k] = v
		}
	}

	up, err := readUptime()
	if err != nil {
		return nil, errors.Wrapf(err, "error reading up time")
	}
	// Convert uptime in seconds to a human-readable format
	upSeconds := up + "s"
	upDuration, err := time.ParseDuration(upSeconds)
	if err != nil {
		return nil, errors.Wrapf(err, "error parsing system uptime")
	}

	hoursFound := false
	var timeBuffer bytes.Buffer
	var hoursBuffer bytes.Buffer
	for _, elem := range upDuration.String() {
		timeBuffer.WriteRune(elem)
		if elem == 'h' || elem == 'm' {
			timeBuffer.WriteRune(' ')
			if elem == 'h' {
				hoursFound = true
			}
		}
		if !hoursFound {
			hoursBuffer.WriteRune(elem)
		}
	}

	info["uptime"] = timeBuffer.String()
	if hoursFound {
		hours, err := strconv.ParseFloat(hoursBuffer.String(), 64)
		if err == nil {
			days := hours / 24
			info["uptime"] = fmt.Sprintf("%s (Approximately %.2f days)", info["uptime"], days)
		}
	}

	host, err := os.Hostname()
	if err != nil {
		return nil, errors.Wrapf(err, "error getting hostname")
	}
	info["hostname"] = host
	info["eventlogger"] = r.eventer.String()

	return info, nil
}

// top-level "store" info
func (r *Runtime) storeInfo() (map[string]interface{}, error) {
	// lets say storage driver in use, number of images, number of containers
	info := map[string]interface{}{}
	info["GraphRoot"] = r.store.GraphRoot()
	info["RunRoot"] = r.store.RunRoot()
	info["GraphDriverName"] = r.store.GraphDriverName()
	graphOptions := map[string]interface{}{}
	for _, o := range r.store.GraphOptions() {
		split := strings.SplitN(o, "=", 2)
		if strings.HasSuffix(split[0], "mount_program") {
			version, err := programVersion(split[1])
			if err != nil {
				logrus.Warnf("Failed to retrieve program version for %s: %v", split[1], err)
			}
			program := map[string]interface{}{}
			program["Executable"] = split[1]
			program["Version"] = version
			program["Package"] = packageVersion(split[1])
			graphOptions[split[0]] = program
		} else {
			graphOptions[split[0]] = split[1]
		}
	}
	info["GraphOptions"] = graphOptions
	info["VolumePath"] = r.config.Engine.VolumePath

	configFile, err := storage.DefaultConfigFile(rootless.IsRootless())
	if err != nil {
		return nil, err
	}
	info["ConfigFile"] = configFile
	statusPairs, err := r.store.Status()
	if err != nil {
		return nil, err
	}
	status := map[string]string{}
	for _, pair := range statusPairs {
		status[pair[0]] = pair[1]
	}
	info["GraphStatus"] = status
	images, err := r.store.Images()
	if err != nil {
		return nil, errors.Wrapf(err, "error getting number of images")
	}
	info["ImageStore"] = map[string]interface{}{
		"number": len(images),
	}

	containers, err := r.store.Containers()
	if err != nil {
		return nil, errors.Wrapf(err, "error getting number of containers")
	}
	info["ContainerStore"] = map[string]interface{}{
		"number": len(containers),
	}

	return info, nil
}

func readKernelVersion() (string, error) {
	buf, err := ioutil.ReadFile("/proc/version")
	if err != nil {
		return "", err
	}
	f := bytes.Fields(buf)
	if len(f) < 2 {
		return string(bytes.TrimSpace(buf)), nil
	}
	return string(f[2]), nil
}

func readUptime() (string, error) {
	buf, err := ioutil.ReadFile("/proc/uptime")
	if err != nil {
		return "", err
	}
	f := bytes.Fields(buf)
	if len(f) < 1 {
		return "", fmt.Errorf("invalid uptime")
	}
	return string(f[0]), nil
}

// GetHostDistributionInfo returns a map containing the host's distribution and version
func (r *Runtime) GetHostDistributionInfo() map[string]string {
	dist := make(map[string]string)

	// Populate values in case we cannot find the values
	// or the file
	dist["Distribution"] = "unknown"
	dist["Version"] = "unknown"

	f, err := os.Open("/etc/os-release")
	if err != nil {
		return dist
	}
	defer f.Close()

	l := bufio.NewScanner(f)
	for l.Scan() {
		if strings.HasPrefix(l.Text(), "ID=") {
			dist["Distribution"] = strings.TrimPrefix(l.Text(), "ID=")
		}
		if strings.HasPrefix(l.Text(), "VERSION_ID=") {
			dist["Version"] = strings.Trim(strings.TrimPrefix(l.Text(), "VERSION_ID="), "\"")
		}
	}
	return dist
}