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util.go
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util.go
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package ovnmonitor
import (
"fmt"
"io/ioutil"
"os/exec"
"strconv"
"strings"
"sync/atomic"
"k8s.io/klog"
)
// IncrementErrorCounter increases the counter of failed queries to OVN server.
func (e *Exporter) IncrementErrorCounter() {
e.errorsLocker.Lock()
defer e.errorsLocker.Unlock()
atomic.AddInt64(&e.errors, 1)
}
func (e *Exporter) getOvnStatus() map[string]int {
result := make(map[string]int)
// get ovn-northbound status
cmdstr := "ovs-appctl -t /var/run/ovn/ovnnb_db.ctl cluster/status OVN_Northbound"
cmd := exec.Command("sh", "-c", cmdstr)
output, err := cmd.CombinedOutput()
if err != nil {
klog.Errorf("get ovn-northbound status failed, err %v", err)
result["ovsdb-server-northbound"] = 0
}
result["ovsdb-server-northbound"] = parseDbStatus(string(output))
// get ovn-southbound status
cmdstr = "ovs-appctl -t /var/run/ovn/ovnsb_db.ctl cluster/status OVN_Southbound"
cmd = exec.Command("sh", "-c", cmdstr)
output, err = cmd.CombinedOutput()
if err != nil {
klog.Errorf("get ovn-southbound status failed, err %v", err)
result["ovsdb-server-southbound"] = 0
}
result["ovsdb-server-southbound"] = parseDbStatus(string(output))
// get ovn-northd status
pid, err := ioutil.ReadFile("/var/run/ovn/ovn-northd.pid")
if err != nil {
klog.Errorf("read ovn-northd pid failed, err %v", err)
result["ovn-northd"] = 0
} else {
cmdstr := "ovs-appctl -t /var/run/ovn/ovn-northd." + strings.Trim(string(pid), "\n") + ".ctl status"
klog.V(3).Infof("cmd is %v", cmdstr)
cmd := exec.Command("sh", "-c", cmdstr)
output, err := cmd.CombinedOutput()
if err != nil {
klog.Errorf("get ovn-northd status failed, err %v", err)
result["ovn-northd"] = 0
}
if len(strings.Split(string(output), ":")) != 2 {
result["ovn-northd"] = 0
} else {
status := strings.TrimSpace(strings.Split(string(output), ":")[1])
if status == "standby" {
result["ovn-northd"] = 2
} else if status == "active" {
result["ovn-northd"] = 1
}
}
}
return result
}
func getClusterEnableState(dbName string) (bool, error) {
cmdstr := fmt.Sprintf("ovsdb-tool db-is-clustered %s", dbName)
cmd := exec.Command("sh", "-c", cmdstr)
_, err := cmd.CombinedOutput()
if err != nil {
return false, err
}
return true, nil
}
func (e *Exporter) setLogicalSwitchInfoMetric() {
lsws, err := e.Client.GetLogicalSwitches()
if err != nil {
klog.Errorf("%s: %v", e.Client.Database.Southbound.Name, err)
e.IncrementErrorCounter()
} else {
for _, lsw := range lsws {
metricLogicalSwitchInfo.WithLabelValues(e.Client.System.Hostname, lsw.UUID, lsw.Name).Set(1)
metricLogicalSwitchPortsNum.WithLabelValues(e.Client.System.Hostname, lsw.UUID, lsw.Name).Set(float64(len(lsw.Ports)))
if len(lsw.Ports) > 0 {
for _, p := range lsw.Ports {
metricLogicalSwitchPortBinding.WithLabelValues(e.Client.System.Hostname, lsw.UUID, p, lsw.Name).Set(1)
}
}
if len(lsw.ExternalIDs) > 0 {
for k, v := range lsw.ExternalIDs {
metricLogicalSwitchExternalIDs.WithLabelValues(e.Client.System.Hostname, lsw.UUID, k, v, lsw.Name).Set(1)
}
}
metricLogicalSwitchTunnelKey.WithLabelValues(e.Client.System.Hostname, lsw.UUID, lsw.Name).Set(float64(lsw.TunnelKey))
}
}
}
func (e *Exporter) setLogicalSwitchPortInfoMetric() {
lswps, err := e.Client.GetLogicalSwitchPorts()
if err != nil {
klog.Errorf("%s: %v", e.Client.Database.Southbound.Name, err)
e.IncrementErrorCounter()
} else {
for _, port := range lswps {
metricLogicalSwitchPortInfo.WithLabelValues(e.Client.System.Hostname, port.UUID, port.Name, port.ChassisUUID,
port.LogicalSwitchName, port.DatapathUUID, port.PortBindingUUID, port.MacAddress.String(), port.IPAddress.String()).Set(1)
metricLogicalSwitchPortTunnelKey.WithLabelValues(e.Client.System.Hostname, port.UUID, port.LogicalSwitchName, port.Name).Set(float64(port.TunnelKey))
}
}
}
func getClusterInfo(direction, dbName string) (*OVNDBClusterStatus, error) {
clusterStatus := &OVNDBClusterStatus{}
var err error
cmdstr := fmt.Sprintf("ovs-appctl -t /var/run/ovn/ovn%s_db.ctl cluster/status %s", direction, dbName)
cmd := exec.Command("sh", "-c", cmdstr)
output, err := cmd.CombinedOutput()
if err != nil {
return nil, fmt.Errorf("Failed to retrieve cluster/status info for database %s: %v", dbName, err)
}
for _, line := range strings.Split(string(output), "\n") {
idx := strings.Index(line, ":")
if idx == -1 {
continue
}
switch line[:idx] {
case "Cluster ID":
// the value is of the format `45ef (45ef51b9-9401-46e7-810d-6db0fc344ea2)`
clusterStatus.cid = strings.Trim(strings.Fields(line[idx+2:])[1], "()")
case "Server ID":
clusterStatus.sid = strings.Trim(strings.Fields(line[idx+2:])[1], "()")
case "Status":
clusterStatus.status = line[idx+2:]
case "Role":
clusterStatus.role = line[idx+2:]
case "Term":
if value, err := strconv.ParseFloat(line[idx+2:], 64); err == nil {
clusterStatus.term = value
}
case "Leader":
clusterStatus.leader = line[idx+2:]
case "Vote":
clusterStatus.vote = line[idx+2:]
case "Election timer":
if value, err := strconv.ParseFloat(line[idx+2:], 64); err == nil {
clusterStatus.electionTimer = value
}
case "Log":
// the value is of the format [2, 1108]
values := strings.Split(strings.Trim(line[idx+2:], "[]"), ", ")
if value, err := strconv.ParseFloat(values[0], 64); err == nil {
clusterStatus.logIndexStart = value
}
if value, err := strconv.ParseFloat(values[1], 64); err == nil {
clusterStatus.logIndexNext = value
}
case "Entries not yet committed":
if value, err := strconv.ParseFloat(line[idx+2:], 64); err == nil {
clusterStatus.logNotCommitted = value
}
case "Entries not yet applied":
if value, err := strconv.ParseFloat(line[idx+2:], 64); err == nil {
clusterStatus.logNotApplied = value
}
case "Connections":
// The value could be nil
if len(line[idx+1:]) != 0 {
// the value is of the format `->0000 (->56d7) <-46ac <-56d7`
var connIn, connOut, connInErr, connOutErr float64
for _, conn := range strings.Fields(line[idx+2:]) {
if strings.HasPrefix(conn, "->") {
connOut++
} else if strings.HasPrefix(conn, "<-") {
connIn++
} else if strings.HasPrefix(conn, "(->") {
connOutErr++
} else if strings.HasPrefix(conn, "(<-") {
connInErr++
}
}
clusterStatus.connIn = connIn
clusterStatus.connOut = connOut
clusterStatus.connInErr = connInErr
clusterStatus.connOutErr = connOutErr
}
}
}
return clusterStatus, nil
}
func (e *Exporter) setOvnClusterInfoMetric(c *OVNDBClusterStatus, dbName string) {
metricClusterRole.WithLabelValues(e.Client.System.Hostname, dbName, c.sid, c.cid, c.role).Set(1)
metricClusterStatus.WithLabelValues(e.Client.System.Hostname, dbName, c.sid, c.cid, c.status).Set(1)
metricClusterTerm.WithLabelValues(e.Client.System.Hostname, dbName, c.sid, c.cid).Set(c.term)
if c.leader == "self" {
metricClusterLeaderSelf.WithLabelValues(e.Client.System.Hostname, dbName, c.sid, c.cid).Set(1)
} else {
metricClusterLeaderSelf.WithLabelValues(e.Client.System.Hostname, dbName, c.sid, c.cid).Set(0)
}
if c.vote == "self" {
metricClusterVoteSelf.WithLabelValues(e.Client.System.Hostname, dbName, c.sid, c.cid).Set(1)
} else {
metricClusterVoteSelf.WithLabelValues(e.Client.System.Hostname, dbName, c.sid, c.cid).Set(0)
}
metricClusterElectionTimer.WithLabelValues(e.Client.System.Hostname, dbName, c.sid, c.cid).Set(c.electionTimer)
metricClusterNotCommittedEntryCount.WithLabelValues(e.Client.System.Hostname, dbName, c.sid, c.cid).Set(c.logNotCommitted)
metricClusterNotAppliedEntryCount.WithLabelValues(e.Client.System.Hostname, dbName, c.sid, c.cid).Set(c.logNotApplied)
metricClusterLogIndexStart.WithLabelValues(e.Client.System.Hostname, dbName, c.sid, c.cid).Set(c.logIndexStart)
metricClusterLogIndexNext.WithLabelValues(e.Client.System.Hostname, dbName, c.sid, c.cid).Set(c.logIndexNext)
metricClusterInConnTotal.WithLabelValues(e.Client.System.Hostname, dbName, c.sid, c.cid).Set(c.connIn)
metricClusterOutConnTotal.WithLabelValues(e.Client.System.Hostname, dbName, c.sid, c.cid).Set(c.connOut)
metricClusterInConnErrTotal.WithLabelValues(e.Client.System.Hostname, dbName, c.sid, c.cid).Set(c.connInErr)
metricClusterOutConnErrTotal.WithLabelValues(e.Client.System.Hostname, dbName, c.sid, c.cid).Set(c.connOutErr)
}
func parseDbStatus(output string) int {
var status string
var result int
lines := strings.Split(output, "\n")
for _, line := range lines {
if strings.Contains(line, "Role:") {
status = strings.TrimSpace(strings.Split(line, ":")[1])
break
}
}
switch status {
case "leader":
result = 1
case "follower":
result = 2
default:
result = 0
}
return result
}