/
ovn_db.go
575 lines (537 loc) · 18.1 KB
/
ovn_db.go
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package metrics
import (
"fmt"
"os"
"strconv"
"strings"
"time"
"github.com/ovn-org/ovn-kubernetes/go-controller/pkg/util"
"github.com/prometheus/client_golang/prometheus"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/kubernetes"
"k8s.io/klog"
)
var metricOVNDBSessions = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: MetricOvnNamespace,
Subsystem: MetricOvnSubsystemDB,
Name: "jsonrpc_server_sessions",
Help: "Active number of JSON RPC Server sessions to the DB"},
[]string{
"db_name",
},
)
var metricOVNDBMonitor = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: MetricOvnNamespace,
Subsystem: MetricOvnSubsystemDB,
Name: "ovsdb_monitors",
Help: "Number of OVSDB Monitors on the server"},
[]string{
"db_name",
},
)
var metricDBSize = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: MetricOvnNamespace,
Subsystem: MetricOvnSubsystemDB,
Name: "db_size",
Help: "The size of the database file associated with the OVN DB component."},
[]string{
"db_name",
},
)
// ClusterStatus metrics
var metricDBClusterCID = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: MetricOvnNamespace,
Subsystem: MetricOvnSubsystemDB,
Name: "cluster_id",
Help: "A metric with a constant '1' value labeled by database name and cluster uuid"},
[]string{
"db_name",
"cluster_id",
},
)
var metricDBClusterSID = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: MetricOvnNamespace,
Subsystem: MetricOvnSubsystemDB,
Name: "cluster_server_id",
Help: "A metric with a constant '1' value labeled by database name, cluster uuid " +
"and server uuid"},
[]string{
"db_name",
"cluster_id",
"server_id",
},
)
var metricDBClusterServerStatus = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: MetricOvnNamespace,
Subsystem: MetricOvnSubsystemDB,
Name: "cluster_server_status",
Help: "A metric with a constant '1' value labeled by database name, cluster uuid, server uuid " +
"server status"},
[]string{
"db_name",
"cluster_id",
"server_id",
"server_status",
},
)
var metricDBClusterServerRole = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: MetricOvnNamespace,
Subsystem: MetricOvnSubsystemDB,
Name: "cluster_server_role",
Help: "A metric with a constant '1' value labeled by database name, cluster uuid, server uuid " +
"and server role"},
[]string{
"db_name",
"cluster_id",
"server_id",
"server_role",
},
)
var metricDBClusterTerm = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: MetricOvnNamespace,
Subsystem: MetricOvnSubsystemDB,
Name: "cluster_term",
Help: "A metric that returns the current election term value labeled by database name, cluster uuid, and " +
"server uuid"},
[]string{
"db_name",
"cluster_id",
"server_id",
},
)
var metricDBClusterServerVote = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: MetricOvnNamespace,
Subsystem: MetricOvnSubsystemDB,
Name: "cluster_server_vote",
Help: "A metric with a constant '1' value labeled by database name, cluster uuid, server uuid " +
"and server vote"},
[]string{
"db_name",
"cluster_id",
"server_id",
"server_vote",
},
)
var metricDBClusterElectionTimer = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: MetricOvnNamespace,
Subsystem: MetricOvnSubsystemDB,
Name: "cluster_election_timer",
Help: "A metric that returns the current election timer value labeled by database name, cluster uuid, " +
"and server uuid"},
[]string{
"db_name",
"cluster_id",
"server_id",
},
)
var metricDBClusterLogIndexStart = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: MetricOvnNamespace,
Subsystem: MetricOvnSubsystemDB,
Name: "cluster_log_index_start",
Help: "A metric that returns the log entry index start value labeled by database name, cluster uuid, " +
"and server uuid"},
[]string{
"db_name",
"cluster_id",
"server_id",
},
)
var metricDBClusterLogIndexNext = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: MetricOvnNamespace,
Subsystem: MetricOvnSubsystemDB,
Name: "cluster_log_index_next",
Help: "A metric that returns the log entry index next value labeled by database name, cluster uuid, " +
"and server uuid"},
[]string{
"db_name",
"cluster_id",
"server_id",
},
)
var metricDBClusterLogNotCommitted = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: MetricOvnNamespace,
Subsystem: MetricOvnSubsystemDB,
Name: "cluster_log_not_committed",
Help: "A metric that returns the number of log entries not committed labeled by database name, cluster uuid, " +
"and server uuid"},
[]string{
"db_name",
"cluster_id",
"server_id",
},
)
var metricDBClusterLogNotApplied = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: MetricOvnNamespace,
Subsystem: MetricOvnSubsystemDB,
Name: "cluster_log_not_applied",
Help: "A metric that returns the number of log entries not applied labeled by database name, cluster uuid, " +
"and server uuid"},
[]string{
"db_name",
"cluster_id",
"server_id",
},
)
var metricDBClusterConnIn = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: MetricOvnNamespace,
Subsystem: MetricOvnSubsystemDB,
Name: "cluster_inbound_connections_total",
Help: "A metric that returns the total number of inbound connections to the server labeled by " +
"database name, cluster uuid, and server uuid"},
[]string{
"db_name",
"cluster_id",
"server_id",
},
)
var metricDBClusterConnOut = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: MetricOvnNamespace,
Subsystem: MetricOvnSubsystemDB,
Name: "cluster_outbound_connections_total",
Help: "A metric that returns the total number of outbound connections from the server labeled by " +
"database name, cluster uuid, and server uuid"},
[]string{
"db_name",
"cluster_id",
"server_id",
},
)
var metricDBClusterConnInErr = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: MetricOvnNamespace,
Subsystem: MetricOvnSubsystemDB,
Name: "cluster_inbound_connections_error_total",
Help: "A metric that returns the total number of failed inbound connections to the server labeled by " +
" database name, cluster uuid, and server uuid"},
[]string{
"db_name",
"cluster_id",
"server_id",
},
)
var metricDBClusterConnOutErr = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: MetricOvnNamespace,
Subsystem: MetricOvnSubsystemDB,
Name: "cluster_outbound_connections_error_total",
Help: "A metric that returns the total number of failed outbound connections from the server labeled by " +
"database name, cluster uuid, and server uuid"},
[]string{
"db_name",
"cluster_id",
"server_id",
},
)
var metricDBE2eTimestamp = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: MetricOvnNamespace,
Subsystem: MetricOvnSubsystemDB,
Name: "e2e_timestamp",
Help: "The current e2e-timestamp value as observed in this instance of the database"},
[]string{
"db_name",
},
)
func ovnDBSizeMetricsUpdater(direction, database string) {
dbFile := fmt.Sprintf("/etc/openvswitch/ovn%s_db.db", direction)
fileInfo, err := os.Stat(dbFile)
if err != nil {
klog.Errorf("Failed to get the DB size for database %s: %v", database, err)
return
}
metricDBSize.WithLabelValues(database).Set(float64(fileInfo.Size()))
}
func ovnE2eTimeStampUpdater(direction, database string) {
var stdout, stderr string
var err error
if direction == "sb" {
stdout, stderr, err = util.RunOVNSbctlUnix("--if-exists", "--no-leader-only",
"get", "SB_Global", ".", "options:e2e_timestamp")
} else {
stdout, stderr, err = util.RunOVNNbctlUnix("--if-exists", "--no-leader-only",
"get", "NB_Global", ".", "options:e2e_timestamp")
}
if err != nil {
klog.Errorf("Failed to scrape timestamp for database %s: "+
"stderr (%s) (%v)", database, stderr, err)
return
}
if stdout != "" {
if value, err := strconv.ParseFloat(stdout, 64); err == nil {
metricDBE2eTimestamp.WithLabelValues(database).Set(value)
} else {
klog.Errorf("Failed to parse %s e2e-timestamp value to float64 :(%v)",
database, err)
}
} else {
metricDBE2eTimestamp.WithLabelValues(database).Set(0)
}
}
func ovnDBMemoryMetricsUpdater(direction, database string) {
var stdout, stderr string
var err error
if direction == "sb" {
stdout, stderr, err = util.RunOVNSBAppCtl("--timeout=5", "memory/show")
} else {
stdout, stderr, err = util.RunOVNNBAppCtl("--timeout=5", "memory/show")
}
if err != nil {
klog.Errorf("Failed retrieving memory/show output for %q, stderr: %s, err: (%v)",
strings.ToUpper(database), stderr, err)
return
}
for _, kvPair := range strings.Fields(stdout) {
if strings.HasPrefix(kvPair, "monitors:") {
// kvPair will be of the form monitors:2
fields := strings.Split(kvPair, ":")
if value, err := strconv.ParseFloat(fields[1], 64); err == nil {
metricOVNDBMonitor.WithLabelValues(database).Set(value)
} else {
klog.Errorf("Failed to parse the monitor's value %s to float64: err(%v)",
fields[1], err)
}
} else if strings.HasPrefix(kvPair, "sessions:") {
// kvPair will be of the form sessions:2
fields := strings.Split(kvPair, ":")
if value, err := strconv.ParseFloat(fields[1], 64); err == nil {
metricOVNDBSessions.WithLabelValues(database).Set(value)
} else {
klog.Errorf("Failed to parse the sessions' value %s to float64: err(%v)",
fields[1], err)
}
}
}
}
var (
ovnDbVersion string
nbDbSchemaVersion string
sbDbSchemaVersion string
)
func getOvnDbVersionInfo() {
stdout, _, err := util.RunOVSDBClient("-V")
if err == nil && strings.HasPrefix(stdout, "ovsdb-client (Open vSwitch) ") {
ovnDbVersion = strings.Fields(stdout)[3]
}
sockPath := "unix:/var/run/openvswitch/ovnnb_db.sock"
stdout, _, err = util.RunOVSDBClient("get-schema-version", sockPath, "OVN_Northbound")
if err == nil {
nbDbSchemaVersion = strings.TrimSpace(stdout)
}
sockPath = "unix:/var/run/openvswitch/ovnsb_db.sock"
stdout, _, err = util.RunOVSDBClient("get-schema-version", sockPath, "OVN_Southbound")
if err == nil {
sbDbSchemaVersion = strings.TrimSpace(stdout)
}
}
func RegisterOvnDBMetrics(clientset kubernetes.Interface, k8sNodeName string) {
err := wait.PollImmediate(1*time.Second, 300*time.Second, func() (bool, error) {
return checkPodRunsOnGivenNode(clientset, "name=ovnkube-db", k8sNodeName, false)
})
if err != nil {
if err == wait.ErrWaitTimeout {
klog.Errorf("Timed out while checking if OVN DB Pod runs on this %q K8s Node: %v. "+
"Not registering OVN DB Metrics on this Node.", k8sNodeName, err)
} else {
klog.Infof("Not registering OVN DB Metrics on this Node since OVN DBs are not running on this node.")
}
return
}
klog.Info("Found OVN DB Pod running on this node. Registering OVN DB Metrics")
// get the ovsdb server version info
getOvnDbVersionInfo()
// register metrics that will be served off of /metrics path
ovnRegistry.MustRegister(metricOVNDBMonitor)
ovnRegistry.MustRegister(metricOVNDBSessions)
ovnRegistry.MustRegister(metricDBSize)
ovnRegistry.MustRegister(prometheus.NewGaugeFunc(
prometheus.GaugeOpts{
Namespace: MetricOvnNamespace,
Subsystem: MetricOvnSubsystemDB,
Name: "build_info",
Help: "A metric with a constant '1' value labeled by ovsdb-server version and " +
"NB and SB schema version",
ConstLabels: prometheus.Labels{
"version": ovnDbVersion,
"nb_schema_version": nbDbSchemaVersion,
"sb_schema_version": sbDbSchemaVersion,
},
},
func() float64 { return 1 },
))
// check if DB is clustered or not
dbIsClustered := true
_, _, err = util.RunOVSDBTool("db-is-standalone", "/etc/openvswitch/ovnsb_db.db")
if err == nil {
dbIsClustered = false
}
if dbIsClustered {
ovnRegistry.MustRegister(metricDBClusterCID)
ovnRegistry.MustRegister(metricDBClusterSID)
ovnRegistry.MustRegister(metricDBClusterServerStatus)
ovnRegistry.MustRegister(metricDBClusterTerm)
ovnRegistry.MustRegister(metricDBClusterServerRole)
ovnRegistry.MustRegister(metricDBClusterServerVote)
ovnRegistry.MustRegister(metricDBClusterElectionTimer)
ovnRegistry.MustRegister(metricDBClusterLogIndexStart)
ovnRegistry.MustRegister(metricDBClusterLogIndexNext)
ovnRegistry.MustRegister(metricDBClusterLogNotCommitted)
ovnRegistry.MustRegister(metricDBClusterLogNotApplied)
ovnRegistry.MustRegister(metricDBClusterConnIn)
ovnRegistry.MustRegister(metricDBClusterConnOut)
ovnRegistry.MustRegister(metricDBClusterConnInErr)
ovnRegistry.MustRegister(metricDBClusterConnOutErr)
}
ovnRegistry.MustRegister(metricDBE2eTimestamp)
// functions responsible for collecting the values and updating the prometheus metrics
go func() {
dirDbMap := map[string]string{
"nb": "OVN_Northbound",
"sb": "OVN_Southbound",
}
for {
for direction, database := range dirDbMap {
if dbIsClustered {
ovnDBClusterStatusMetricsUpdater(direction, database)
}
ovnDBMemoryMetricsUpdater(direction, database)
ovnDBSizeMetricsUpdater(direction, database)
ovnE2eTimeStampUpdater(direction, database)
}
time.Sleep(30 * time.Second)
}
}()
}
type OVNDBClusterStatus struct {
cid string
sid string
status string
role string
vote string
term float64
electionTimer float64
logIndexStart float64
logIndexNext float64
logNotCommitted float64
logNotApplied float64
connIn float64
connOut float64
connInErr float64
connOutErr float64
}
func getOVNDBClusterStatusInfo(timeout int, direction, database string) (clusterStatus *OVNDBClusterStatus,
err error) {
var stdout, stderr string
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("recovering from a panic while parsing the cluster/status output "+
"for database %q: %v", database, r)
}
}()
if direction == "sb" {
stdout, stderr, err = util.RunOVNSBAppCtl(fmt.Sprintf("--timeout=%d", timeout),
"cluster/status", database)
} else {
stdout, stderr, err = util.RunOVNNBAppCtl(fmt.Sprintf("--timeout=%d", timeout),
"cluster/status", database)
}
if err != nil {
klog.Errorf("Failed to retrieve cluster/status info for database %q, stderr: %s, err: (%v)",
database, stderr, err)
return nil, err
}
clusterStatus = &OVNDBClusterStatus{}
for _, line := range strings.Split(stdout, "\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 "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 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 ovnDBClusterStatusMetricsUpdater(direction, database string) {
clusterStatus, err := getOVNDBClusterStatusInfo(5, direction, database)
if err != nil {
klog.Errorf(err.Error())
return
}
metricDBClusterCID.WithLabelValues(database, clusterStatus.cid).Set(1)
metricDBClusterSID.WithLabelValues(database, clusterStatus.cid, clusterStatus.sid).Set(1)
metricDBClusterServerStatus.WithLabelValues(database, clusterStatus.cid, clusterStatus.sid,
clusterStatus.status).Set(1)
metricDBClusterTerm.WithLabelValues(database, clusterStatus.cid, clusterStatus.sid).Set(clusterStatus.term)
metricDBClusterServerRole.WithLabelValues(database, clusterStatus.cid, clusterStatus.sid,
clusterStatus.role).Set(1)
metricDBClusterServerVote.WithLabelValues(database, clusterStatus.cid, clusterStatus.sid,
clusterStatus.vote).Set(1)
metricDBClusterElectionTimer.WithLabelValues(database, clusterStatus.cid,
clusterStatus.sid).Set(clusterStatus.electionTimer)
metricDBClusterLogIndexStart.WithLabelValues(database, clusterStatus.cid,
clusterStatus.sid).Set(clusterStatus.logIndexStart)
metricDBClusterLogIndexNext.WithLabelValues(database, clusterStatus.cid,
clusterStatus.sid).Set(clusterStatus.logIndexNext)
metricDBClusterLogNotCommitted.WithLabelValues(database, clusterStatus.cid,
clusterStatus.sid).Set(clusterStatus.logNotCommitted)
metricDBClusterLogNotApplied.WithLabelValues(database, clusterStatus.cid,
clusterStatus.sid).Set(clusterStatus.logNotApplied)
metricDBClusterConnIn.WithLabelValues(database, clusterStatus.cid,
clusterStatus.sid).Set(clusterStatus.connIn)
metricDBClusterConnOut.WithLabelValues(database, clusterStatus.cid,
clusterStatus.sid).Set(clusterStatus.connOut)
metricDBClusterConnInErr.WithLabelValues(database, clusterStatus.cid,
clusterStatus.sid).Set(clusterStatus.connInErr)
metricDBClusterConnOutErr.WithLabelValues(database, clusterStatus.cid,
clusterStatus.sid).Set(clusterStatus.connOutErr)
}