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|
package guestmetric
import (
xenstoreclient "../xenstoreclient"
"bufio"
"bytes"
"fmt"
"os"
"path/filepath"
"regexp"
"sort"
"strconv"
"strings"
)
type Collector struct {
Client xenstoreclient.XenStoreClient
Ballon bool
Debug bool
}
func (c *Collector) CollectOS() (GuestMetric, error) {
current := make(GuestMetric, 0)
f, err := os.OpenFile("/var/cache/xe-linux-distribution", os.O_RDONLY, 0666)
if err != nil {
return nil, err
}
defer f.Close()
scanner := bufio.NewScanner(f)
for scanner.Scan() {
line := scanner.Text()
if strings.Contains(line, "=") {
parts := strings.SplitN(line, "=", 2)
k := strings.TrimSpace(parts[0])
v := strings.TrimSpace(strings.Trim(strings.TrimSpace(parts[1]), "\""))
current[k] = v
}
}
return prefixKeys("data/", current), nil
}
func (c *Collector) CollectMisc() (GuestMetric, error) {
current := make(GuestMetric, 0)
if c.Ballon {
current["control/feature-balloon"] = "1"
} else {
current["control/feature-balloon"] = "0"
}
current["attr/PVAddons/Installed"] = "1"
current["attr/PVAddons/MajorVersion"] = "@PRODUCT_MAJOR_VERSION@"
current["attr/PVAddons/MinorVersion"] = "@PRODUCT_MINOR_VERSION@"
current["attr/PVAddons/MicroVersion"] = "@PRODUCT_MICRO_VERSION@"
current["attr/PVAddons/BuildVersion"] = "@NUMERIC_BUILD_NUMBER@"
return current, nil
}
func (c *Collector) CollectMemory() (GuestMetric, error) {
current := make(GuestMetric, 0)
f, err := os.OpenFile("/proc/meminfo", os.O_RDONLY, 0666)
if err != nil {
return nil, err
}
defer f.Close()
scanner := bufio.NewScanner(f)
for scanner.Scan() {
parts := regexp.MustCompile(`\w+`).FindAllString(scanner.Text(), -1)
switch parts[0] {
case "MemTotal":
current["meminfo_total"] = parts[1]
case "MemFree":
current["meminfo_free"] = parts[1]
}
}
return prefixKeys("data/", current), nil
}
func EnumNetworkAddresses(iface string) (GuestMetric, error) {
const (
IP_RE string = `(\d{1,3}\.){3}\d{1,3}`
IPV6_RE string = `[\da-f:]+[\da-f]`
)
var (
IP_IPV4_ADDR_RE = regexp.MustCompile(`inet\s*(` + IP_RE + `).*\se[a-zA-Z0-9]+\s`)
IP_IPV6_ADDR_RE = regexp.MustCompile(`inet6\s*(` + IPV6_RE + `)`)
IFCONFIG_IPV4_ADDR_RE = regexp.MustCompile(`inet addr:\s*(` + IP_RE + `)`)
IFCONFIG_IPV6_ADDR_RE = regexp.MustCompile(`inet6 addr:\s*(` + IPV6_RE + `)`)
)
d := make(GuestMetric, 0)
var v4re, v6re *regexp.Regexp
var out string
var err error
if out, err = runCmd("ip", "addr", "show", iface); err == nil {
v4re = IP_IPV4_ADDR_RE
v6re = IP_IPV6_ADDR_RE
} else if out, err = runCmd("ifconfig", iface); err == nil {
v4re = IFCONFIG_IPV4_ADDR_RE
v6re = IFCONFIG_IPV6_ADDR_RE
} else {
return nil, fmt.Errorf("Cannot found ip/ifconfig command")
}
m := v4re.FindAllStringSubmatch(out, -1)
if m != nil {
for _, parts := range m {
d["ip"] = parts[1]
}
}
m = v6re.FindAllStringSubmatch(out, -1)
if m != nil {
for i, parts := range m {
d[fmt.Sprintf("ipv6/%d/addr", i)] = parts[1]
}
}
return d, nil
}
func (c *Collector) CollectNetworkAddr() (GuestMetric, error) {
current := make(GuestMetric, 0)
paths, err := filepath.Glob("/sys/class/net/e*")
if err != nil {
return nil, err
}
for _, path := range paths {
iface := filepath.Base(path)
if addrs, err := EnumNetworkAddresses(iface); err == nil {
for tag, addr := range addrs {
current[fmt.Sprintf("%s/%s", iface, tag)] = addr
}
}
}
return prefixKeys("attr/", current), nil
}
func readSysfs(filename string) (string, error) {
f, err := os.OpenFile(filename, os.O_RDONLY, 0666)
if err != nil {
return "", err
}
defer f.Close()
scanner := bufio.NewScanner(f)
scanner.Scan()
return scanner.Text(), nil
}
func (c *Collector) CollectDisk() (GuestMetric, error) {
pi := make(GuestMetric, 0)
disks := make([]string, 0)
paths, err := filepath.Glob("/sys/block/*/device")
if err != nil {
return nil, err
}
for _, path := range paths {
disk := filepath.Base(strings.TrimSuffix(filepath.Dir(path), "/"))
disks = append(disks, disk)
}
var sortedDisks sort.StringSlice = disks
sortedDisks.Sort()
part_idx := 0
for _, disk := range sortedDisks[:] {
paths, err = filepath.Glob(fmt.Sprintf("/dev/%s?*", disk))
if err != nil {
return nil, err
}
for _, path := range paths {
p := filepath.Base(path)
line, err := readSysfs(fmt.Sprintf("/sys/block/%s/%s/size", disk, p))
if err != nil {
return nil, err
}
size, err := strconv.ParseInt(line, 10, 64)
if err != nil {
return nil, err
}
blocksize := 512
if bs, err := readSysfs(fmt.Sprintf("/sys/block/%s/queue/physical_block_size", p)); err == nil {
if bs1, err := strconv.Atoi(bs); err == nil {
blocksize = bs1
}
}
real_dev := ""
if c.Client != nil {
nodename, err := readSysfs(fmt.Sprintf("/sys/block/%s/device/nodename", disk))
if err != nil {
return nil, err
}
backend, err := c.Client.Read(fmt.Sprintf("%s/backend", nodename))
if err != nil {
return nil, err
}
real_dev, err = c.Client.Read(fmt.Sprintf("%s/dev", backend))
if err != nil {
return nil, err
}
}
name := path
blkid, err := runCmd("blkid", "-s", "UUID", path)
if err != nil {
return nil, err
}
if strings.Contains(blkid, "=") {
parts := strings.SplitN(strings.TrimSpace(blkid), "=", 2)
name = fmt.Sprintf("%s(%s)", name, strings.Trim(parts[1], "\""))
}
i := map[string]string{
"extents/0": real_dev,
"name": name,
"size": strconv.FormatInt(size*int64(blocksize), 10),
}
output, err := runCmd("pvs", "--noheadings", "--units", "b", path)
if err == nil && output != "" {
parts := regexp.MustCompile(`\s+`).Split(output, -1)[1:]
i["free"] = strings.TrimSpace(parts[5])[:len(parts[5])-1]
i["filesystem"] = strings.TrimSpace(parts[2])
i["mount_points/0"] = "[LVM]"
} else {
output, err = runCmd("mount")
if err == nil {
m := regexp.MustCompile(`(?m)^(\S+) on (\S+) type (\S+)`).FindAllStringSubmatch(output, -1)
if m != nil {
for _, parts := range m {
if parts[1] == path {
i["mount_points/0"] = parts[2]
i["filesystem"] = parts[3]
break
}
}
}
}
output, err = runCmd("df", path)
if err == nil {
scanner := bufio.NewScanner(bytes.NewReader([]byte(output)))
scanner.Scan()
scanner.Scan()
parts := regexp.MustCompile(`\s+`).Split(scanner.Text(), -1)
free, err := strconv.ParseInt(parts[3], 10, 64)
if err == nil {
i["free"] = strconv.FormatInt(free*1024, 10)
}
}
}
for k, v := range i {
pi[fmt.Sprintf("data/volumes/%d/%s", part_idx, k)] = v
}
part_idx += 1
}
}
return pi, nil
}
|
