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proxmox.go
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proxmox.go
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package proxmox
import (
"encoding/json"
"errors"
"io/ioutil"
"net/http"
"net/url"
"os"
"strings"
"time"
"github.com/influxdata/telegraf"
"github.com/influxdata/telegraf/plugins/inputs"
)
var sampleConfig = `
## API connection configuration. The API token was introduced in Proxmox v6.2. Required permissions for user and token: PVEAuditor role on /.
base_url = "https://localhost:8006/api2/json"
api_token = "USER@REALM!TOKENID=UUID"
## Node name, defaults to OS hostname
# node_name = ""
## Optional TLS Config
# tls_ca = "/etc/telegraf/ca.pem"
# tls_cert = "/etc/telegraf/cert.pem"
# tls_key = "/etc/telegraf/key.pem"
## Use TLS but skip chain & host verification
insecure_skip_verify = false
# HTTP response timeout (default: 5s)
response_timeout = "5s"
`
func (px *Proxmox) SampleConfig() string {
return sampleConfig
}
func (px *Proxmox) Description() string {
return "Provides metrics from Proxmox nodes (Proxmox Virtual Environment > 6.2)."
}
func (px *Proxmox) Gather(acc telegraf.Accumulator) error {
err := getNodeSearchDomain(px)
if err != nil {
return err
}
gatherLxcData(px, acc)
gatherQemuData(px, acc)
return nil
}
func (px *Proxmox) Init() error {
// Set hostname as default node name for backwards compatibility
if px.NodeName == "" {
hostname, _ := os.Hostname()
px.NodeName = hostname
}
tlsCfg, err := px.ClientConfig.TLSConfig()
if err != nil {
return err
}
px.httpClient = &http.Client{
Transport: &http.Transport{
TLSClientConfig: tlsCfg,
},
Timeout: time.Duration(px.ResponseTimeout),
}
return nil
}
func init() {
inputs.Add("proxmox", func() telegraf.Input {
return &Proxmox{
requestFunction: performRequest,
}
})
}
func getNodeSearchDomain(px *Proxmox) error {
apiURL := "/nodes/" + px.NodeName + "/dns"
jsonData, err := px.requestFunction(px, apiURL, http.MethodGet, nil)
if err != nil {
return err
}
var nodeDNS NodeDNS
err = json.Unmarshal(jsonData, &nodeDNS)
if err != nil {
return err
}
if nodeDNS.Data.Searchdomain == "" {
return errors.New("search domain is not set")
}
px.nodeSearchDomain = nodeDNS.Data.Searchdomain
return nil
}
func performRequest(px *Proxmox, apiURL string, method string, data url.Values) ([]byte, error) {
request, err := http.NewRequest(method, px.BaseURL+apiURL, strings.NewReader(data.Encode()))
if err != nil {
return nil, err
}
request.Header.Add("Authorization", "PVEAPIToken="+px.APIToken)
resp, err := px.httpClient.Do(request)
if err != nil {
return nil, err
}
defer resp.Body.Close()
responseBody, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
return responseBody, nil
}
func gatherLxcData(px *Proxmox, acc telegraf.Accumulator) {
gatherVMData(px, acc, LXC)
}
func gatherQemuData(px *Proxmox, acc telegraf.Accumulator) {
gatherVMData(px, acc, QEMU)
}
func gatherVMData(px *Proxmox, acc telegraf.Accumulator, rt ResourceType) {
vmStats, err := getVMStats(px, rt)
if err != nil {
px.Log.Error("Error getting VM stats: %v", err)
return
}
// For each VM add metrics to Accumulator
for _, vmStat := range vmStats.Data {
vmConfig, err := getVMConfig(px, vmStat.ID, rt)
if err != nil {
px.Log.Errorf("Error getting VM config: %v", err)
return
}
if vmConfig.Data.Template == 1 {
px.Log.Debugf("Ignoring template VM %s (%s)", vmStat.ID, vmStat.Name)
continue
}
tags := getTags(px, vmStat.Name, vmConfig, rt)
currentVMStatus, err := getCurrentVMStatus(px, rt, vmStat.ID)
if err != nil {
px.Log.Errorf("Error getting VM curent VM status: %v", err)
return
}
fields := getFields(currentVMStatus)
acc.AddFields("proxmox", fields, tags)
}
}
func getCurrentVMStatus(px *Proxmox, rt ResourceType, id string) (VMStat, error) {
apiURL := "/nodes/" + px.NodeName + "/" + string(rt) + "/" + id + "/status/current"
jsonData, err := px.requestFunction(px, apiURL, http.MethodGet, nil)
if err != nil {
return VMStat{}, err
}
var currentVMStatus VMCurrentStats
err = json.Unmarshal(jsonData, ¤tVMStatus)
if err != nil {
return VMStat{}, err
}
return currentVMStatus.Data, nil
}
func getVMStats(px *Proxmox, rt ResourceType) (VMStats, error) {
apiURL := "/nodes/" + px.NodeName + "/" + string(rt)
jsonData, err := px.requestFunction(px, apiURL, http.MethodGet, nil)
if err != nil {
return VMStats{}, err
}
var vmStats VMStats
err = json.Unmarshal(jsonData, &vmStats)
if err != nil {
return VMStats{}, err
}
return vmStats, nil
}
func getVMConfig(px *Proxmox, vmID string, rt ResourceType) (VMConfig, error) {
apiURL := "/nodes/" + px.NodeName + "/" + string(rt) + "/" + vmID + "/config"
jsonData, err := px.requestFunction(px, apiURL, http.MethodGet, nil)
if err != nil {
return VMConfig{}, err
}
var vmConfig VMConfig
err = json.Unmarshal(jsonData, &vmConfig)
if err != nil {
return VMConfig{}, err
}
return vmConfig, nil
}
func getFields(vmStat VMStat) map[string]interface{} {
memTotal, memUsed, memFree, memUsedPercentage := getByteMetrics(vmStat.TotalMem, vmStat.UsedMem)
swapTotal, swapUsed, swapFree, swapUsedPercentage := getByteMetrics(vmStat.TotalSwap, vmStat.UsedSwap)
diskTotal, diskUsed, diskFree, diskUsedPercentage := getByteMetrics(vmStat.TotalDisk, vmStat.UsedDisk)
return map[string]interface{}{
"status": vmStat.Status,
"uptime": jsonNumberToInt64(vmStat.Uptime),
"cpuload": jsonNumberToFloat64(vmStat.CPULoad),
"mem_used": memUsed,
"mem_total": memTotal,
"mem_free": memFree,
"mem_used_percentage": memUsedPercentage,
"swap_used": swapUsed,
"swap_total": swapTotal,
"swap_free": swapFree,
"swap_used_percentage": swapUsedPercentage,
"disk_used": diskUsed,
"disk_total": diskTotal,
"disk_free": diskFree,
"disk_used_percentage": diskUsedPercentage,
}
}
func getByteMetrics(total json.Number, used json.Number) (int64, int64, int64, float64) {
int64Total := jsonNumberToInt64(total)
int64Used := jsonNumberToInt64(used)
int64Free := int64Total - int64Used
usedPercentage := 0.0
if int64Total != 0 {
usedPercentage = float64(int64Used) * 100 / float64(int64Total)
}
return int64Total, int64Used, int64Free, usedPercentage
}
func jsonNumberToInt64(value json.Number) int64 {
int64Value, err := value.Int64()
if err != nil {
return 0
}
return int64Value
}
func jsonNumberToFloat64(value json.Number) float64 {
float64Value, err := value.Float64()
if err != nil {
return 0
}
return float64Value
}
func getTags(px *Proxmox, name string, vmConfig VMConfig, rt ResourceType) map[string]string {
domain := vmConfig.Data.Searchdomain
if len(domain) == 0 {
domain = px.nodeSearchDomain
}
hostname := vmConfig.Data.Hostname
if len(hostname) == 0 {
hostname = name
}
fqdn := hostname + "." + domain
return map[string]string{
"node_fqdn": px.NodeName + "." + px.nodeSearchDomain,
"vm_name": name,
"vm_fqdn": fqdn,
"vm_type": string(rt),
}
}