Drop OVS dependency from OVN exporter

The OVN exporter no longer connects to or depends on the Open vSwitch
database. All identity and version labels now come from local sources
and the OVN Northbound/Southbound databases that the exporter already
talks to.

ovn_info labels:
  - kept:    system_id, hostname, system_type, system_version
  - dropped: rundir, ovs_version, db_version
  - added:   nb_schema_version, sb_schema_version

Sources:
  - system_id and hostname come from os.Hostname()
  - system_type and system_version come from /etc/os-release
    (fall back to "unknown" if the file is missing)
  - nb_schema_version and sb_schema_version come from GetSchema()
    on the NB and SB databases

Flags removed (unknown flag now errors at startup):
  - system.run.dir
  - database.vswitch.*  (name, socket.remote, file.data.path,
                         file.log.path, file.pid.path,
                         file.system.id.path)
  - service.vswitchd.*  (file.log.path, file.pid.path)

Component lists for process probes, log file probes, and OVSDB
clustering queries no longer include plain "ovsdb-server" or
"ovs-vswitchd" -- only OVN NB/SB DB servers and ovn-northd remain.

Dashboards and the kolla-ansible contrib templates are updated to
match the new label set and no longer reference OVS container units.

go.mod pins github.com/lucadelmonte/ovsdb at the commit where
OvnClient.Connect() stops dialing the Open_vSwitch socket.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: lucadelmonte

cmd/ovn_exporter/main.go

@@ -20,13 +20,6 @@ func main() {
 	var pollInterval int
 	var isShowVersion bool
 	var logLevel string
-	var systemRunDir string
-	var databaseVswitchName string
-	var databaseVswitchSocketRemote string
-	var databaseVswitchFileDataPath string
-	var databaseVswitchFileLogPath string
-	var databaseVswitchFilePidPath string
-	var databaseVswitchFileSystemIDPath string
 	var databaseNorthboundName string
 	var databaseNorthboundSocketRemote string
 	var databaseNorthboundSocketControl string
@@ -45,8 +38,6 @@ func main() {
 	var databaseSouthboundPortDefault int
 	var databaseSouthboundPortSsl int
 	var databaseSouthboundPortRaft int
-	var serviceVswitchdFileLogPath string
-	var serviceVswitchdFilePidPath string
 	var serviceNorthdFileLogPath string
 	var serviceNorthdFilePidPath string
 
@@ -57,15 +48,6 @@ func main() {
 	flag.BoolVar(&isShowVersion, "version", false, "version information")
 	flag.StringVar(&logLevel, "log.level", "info", "logging severity level")
 
-	flag.StringVar(&systemRunDir, "system.run.dir", "/var/run/openvswitch", "OVS default run directory.")
-
-	flag.StringVar(&databaseVswitchName, "database.vswitch.name", "Open_vSwitch", "The name of OVS db.")
-	flag.StringVar(&databaseVswitchSocketRemote, "database.vswitch.socket.remote", "unix:/var/run/openvswitch/db.sock", "JSON-RPC unix socket to OVS db.")
-	flag.StringVar(&databaseVswitchFileDataPath, "database.vswitch.file.data.path", "/etc/openvswitch/conf.db", "OVS db file.")
-	flag.StringVar(&databaseVswitchFileLogPath, "database.vswitch.file.log.path", "/var/log/openvswitch/ovsdb-server.log", "OVS db log file.")
-	flag.StringVar(&databaseVswitchFilePidPath, "database.vswitch.file.pid.path", "/var/run/openvswitch/ovsdb-server.pid", "OVS db process id file.")
-	flag.StringVar(&databaseVswitchFileSystemIDPath, "database.vswitch.file.system.id.path", "/etc/openvswitch/system-id.conf", "OVS system id file.")
-
 	flag.StringVar(&databaseNorthboundName, "database.northbound.name", "OVN_Northbound", "The name of OVN NB (northbound) db.")
 	flag.StringVar(&databaseNorthboundSocketRemote, "database.northbound.socket.remote", "unix:/run/openvswitch/ovnnb_db.sock", "JSON-RPC unix socket to OVN NB db.")
 	flag.StringVar(&databaseNorthboundSocketControl, "database.northbound.socket.control", "unix:/run/openvswitch/ovnnb_db.ctl", "JSON-RPC unix socket to OVN NB app.")
@@ -86,9 +68,6 @@ func main() {
 	flag.IntVar(&databaseSouthboundPortSsl, "database.southbound.port.ssl", 6632, "OVN SB db network socket secure port.")
 	flag.IntVar(&databaseSouthboundPortRaft, "database.southbound.port.raft", 6644, "OVN SB db network port for clustering (raft)")
 
-	flag.StringVar(&serviceVswitchdFileLogPath, "service.vswitchd.file.log.path", "/var/log/openvswitch/ovs-vswitchd.log", "OVS vswitchd daemon log file.")
-	flag.StringVar(&serviceVswitchdFilePidPath, "service.vswitchd.file.pid.path", "/var/run/openvswitch/ovs-vswitchd.pid", "OVS vswitchd daemon process id file.")
-
 	flag.StringVar(&serviceNorthdFileLogPath, "service.ovn.northd.file.log.path", "/var/log/openvswitch/ovn-northd.log", "OVN northd daemon log file.")
 	flag.StringVar(&serviceNorthdFilePidPath, "service.ovn.northd.file.pid.path", "/run/openvswitch/ovn-northd.pid", "OVN northd daemon process id file.")
 
@@ -138,15 +117,6 @@ func main() {
 		os.Exit(1)
 	}
 
-	exporter.Client.System.RunDir = systemRunDir
-
-	exporter.Client.Database.Vswitch.Name = databaseVswitchName
-	exporter.Client.Database.Vswitch.Socket.Remote = databaseVswitchSocketRemote
-	exporter.Client.Database.Vswitch.File.Data.Path = databaseVswitchFileDataPath
-	exporter.Client.Database.Vswitch.File.Log.Path = databaseVswitchFileLogPath
-	exporter.Client.Database.Vswitch.File.Pid.Path = databaseVswitchFilePidPath
-	exporter.Client.Database.Vswitch.File.SystemID.Path = databaseVswitchFileSystemIDPath
-
 	exporter.Client.Database.Northbound.Name = databaseNorthboundName
 	exporter.Client.Database.Northbound.Socket.Remote = databaseNorthboundSocketRemote
 	exporter.Client.Database.Northbound.Socket.Control = databaseNorthboundSocketControl
@@ -167,9 +137,6 @@ func main() {
 	exporter.Client.Database.Southbound.Port.Ssl = databaseSouthboundPortSsl
 	exporter.Client.Database.Southbound.Port.Raft = databaseSouthboundPortRaft
 
-	exporter.Client.Service.Vswitchd.File.Log.Path = serviceVswitchdFileLogPath
-	exporter.Client.Service.Vswitchd.File.Pid.Path = serviceVswitchdFilePidPath
-
 	exporter.Client.Service.Northd.File.Log.Path = serviceNorthdFileLogPath
 	exporter.Client.Service.Northd.File.Pid.Path = serviceNorthdFilePidPath
 

contrib/kolla-ansible/README.md

@@ -107,9 +107,6 @@ curl -s http://localhost:9476/metrics | wc -l
 | SB log | `/var/log/openvswitch/ovsdb-server-sb.log` | `/var/log/kolla/openvswitch/ovn-sb-db.log` |
 | northd PID | `/run/openvswitch/ovn-northd.pid` | `/run/ovn/ovn-northd.pid` |
 | northd log | `/var/log/openvswitch/ovn-northd.log` | `/var/log/kolla/openvswitch/ovn-northd.log` |
-| OVS data | `/etc/openvswitch/conf.db` | `/var/lib/docker/volumes/openvswitch_db/_data/conf.db` |
-| OVS log | `/var/log/openvswitch/ovsdb-server.log` | `/var/log/kolla/openvswitch/ovsdb-server.log` |
-| vswitchd log | `/var/log/openvswitch/ovs-vswitchd.log` | `/var/log/kolla/openvswitch/ovs-vswitchd.log` |
 
 ## Deployment Notes
 
@@ -127,6 +124,6 @@ Both exporters complement each other for complete OVN/OVS visibility.
 
 ## Notes
 
-- The systemd unit depends on `kolla-openvswitch_db-container.service` (required) and OVN containers (wanted)
-- System information is queried directly from the OVS database - no manual system-id file needed
+- The systemd unit depends on the OVN NB/SB DB containers (required) and the northd container (wanted); OVS is not required
+- `system_id` and `hostname` labels are derived from `os.Hostname()`; `system_type`/`system_version` come from `/etc/os-release`; NB/SB schema versions come from the OVN databases
 - Metrics are exposed on port 9476 by default

contrib/kolla-ansible/ovn-exporter-kolla.conf

@@ -10,6 +10,6 @@
 # without modifying the original service file.
 
 [Unit]
-After=docker.service kolla-openvswitch_db-container.service kolla-ovn_nb_db-container.service kolla-ovn_sb_db-container.service kolla-ovn_northd-container.service
-Requires=kolla-openvswitch_db-container.service
-Wants=kolla-ovn_nb_db-container.service kolla-ovn_sb_db-container.service kolla-ovn_northd-container.service
+After=docker.service kolla-ovn_nb_db-container.service kolla-ovn_sb_db-container.service kolla-ovn_northd-container.service
+Requires=kolla-ovn_nb_db-container.service kolla-ovn_sb_db-container.service
+Wants=kolla-ovn_northd-container.service

contrib/kolla-ansible/ovn-exporter.env

@@ -14,11 +14,8 @@ OPTIONS="-database.northbound.socket.remote unix:/run/ovn/ovnnb_db.sock \
 -database.southbound.file.pid.path /run/ovn/ovnsb_db.pid \
 -database.southbound.file.data.path /var/lib/docker/volumes/ovn_sb_db/_data/ovnsb.db \
 -database.southbound.file.log.path /var/log/kolla/openvswitch/ovn-sb-db.log \
--database.vswitch.file.data.path /var/lib/docker/volumes/openvswitch_db/_data/conf.db \
--database.vswitch.file.log.path /var/log/kolla/openvswitch/ovsdb-server.log \
 -service.ovn.northd.file.log.path /var/log/kolla/openvswitch/ovn-northd.log \
--service.ovn.northd.file.pid.path /run/ovn/ovn-northd.pid \
--service.vswitchd.file.log.path /var/log/kolla/openvswitch/ovs-vswitchd.log"
+-service.ovn.northd.file.pid.path /run/ovn/ovn-northd.pid"
 
 # Additional examples (commented out):
 # Change metrics port (default: 9476)

dashboards/ovn-sla-performance.json

@@ -85,7 +85,7 @@
             "uid": "${datasource}"
           },
           "editorMode": "code",
-          "expr": "max by (hostname, ovn_version, db_version, system_type, system_version) (ovn_info)",
+          "expr": "max by (hostname, nb_schema_version, sb_schema_version, system_type, system_version) (ovn_info)",
           "format": "table",
           "instant": true,
           "refId": "A"
@@ -105,15 +105,15 @@
             },
             "indexByName": {
               "hostname": 0,
-              "ovn_version": 1,
-              "db_version": 2,
+              "nb_schema_version": 1,
+              "sb_schema_version": 2,
               "system_type": 3,
               "system_version": 4
             },
             "renameByName": {
               "hostname": "Hostname",
-              "ovn_version": "OVN Version",
-              "db_version": "DB Version",
+              "nb_schema_version": "NB Schema Version",
+              "sb_schema_version": "SB Schema Version",
               "system_type": "System Type",
               "system_version": "OS Version"
             }

dashboards/ovn-system-overview.json

@@ -85,7 +85,7 @@
             "uid": "${datasource}"
           },
           "editorMode": "code",
-          "expr": "max by (hostname, ovn_version, db_version, system_type, system_version) (ovn_info)",
+          "expr": "max by (hostname, nb_schema_version, sb_schema_version, system_type, system_version) (ovn_info)",
           "format": "table",
           "instant": true,
           "refId": "A"
@@ -105,15 +105,15 @@
             },
             "indexByName": {
               "hostname": 0,
-              "ovn_version": 1,
-              "db_version": 2,
+              "nb_schema_version": 1,
+              "sb_schema_version": 2,
               "system_type": 3,
               "system_version": 4
             },
             "renameByName": {
               "hostname": "Hostname",
-              "ovn_version": "OVN Version",
-              "db_version": "DB Version",
+              "nb_schema_version": "NB Schema Version",
+              "sb_schema_version": "SB Schema Version",
               "system_type": "System Type",
               "system_version": "OS Version"
             }

go.mod

@@ -25,4 +25,4 @@ require (
 	google.golang.org/protobuf v1.36.9 // indirect
 )
 
-replace github.com/greenpau/ovsdb => github.com/lucadelmonte/ovsdb v1.0.4-0.20251226203325-87e68f9104f3
+replace github.com/greenpau/ovsdb => github.com/lucadelmonte/ovsdb v1.0.8-0.20260420184110-d033504f3c1d

go.sum

@@ -21,8 +21,8 @@ github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
 github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
-github.com/lucadelmonte/ovsdb v1.0.4-0.20251226203325-87e68f9104f3 h1:Qv+kEgfuBYOKzsRbGbFNRkOrI03D4EDnllDAq542Zpk=
-github.com/lucadelmonte/ovsdb v1.0.4-0.20251226203325-87e68f9104f3/go.mod h1:eZ72kooepm3wDa9o4YgmfEmbFCeibzSYrrZazwaopxo=
+github.com/lucadelmonte/ovsdb v1.0.8-0.20260420184110-d033504f3c1d h1:YKLG/SEOKVFOnuGlAfqypKGS0d5fExqSOewGChypm8A=
+github.com/lucadelmonte/ovsdb v1.0.8-0.20260420184110-d033504f3c1d/go.mod h1:eZ72kooepm3wDa9o4YgmfEmbFCeibzSYrrZazwaopxo=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=

pkg/ovn_exporter/ovn_exporter.go

@@ -64,12 +64,11 @@ var (
 		"This metric provides basic information about OVN stack. It is always set to 1.",
 		[]string{
 			"system_id",
-			"rundir",
 			"hostname",
 			"system_type",
 			"system_version",
-			"ovs_version",
-			"db_version",
+			"nb_schema_version",
+			"sb_schema_version",
 		}, nil,
 	)
 	requestErrors = prometheus.NewDesc(
@@ -515,9 +514,9 @@ func (e *Exporter) Collect(ch chan<- prometheus.Metric) {
 			info,
 			prometheus.GaugeValue,
 			1,
-			e.Client.System.ID, e.Client.System.RunDir, e.Client.System.Hostname,
+			e.Client.System.ID, e.Client.System.Hostname,
 			e.Client.System.Type, e.Client.System.Version,
-			e.Client.Database.Vswitch.Version, e.Client.Database.Vswitch.Schema.Version,
+			e.Client.Database.Northbound.Schema.Version, e.Client.Database.Southbound.Schema.Version,
 		)
 		ch <- prometheus.MustNewConstMetric(
 			requestErrors,
@@ -587,7 +586,6 @@ func (e *Exporter) GatherMetrics() {
 	if err != nil {
 		level.Error(e.logger).Log(
 			"msg", "GetSystemInfo() failed",
-			"vswitch_name", e.Client.Database.Vswitch.Name,
 			"system_id", e.Client.System.ID,
 			"error", err.Error(),
 		)
@@ -597,20 +595,17 @@ func (e *Exporter) GatherMetrics() {
 		e.IncrementSuccessCounter()
 		level.Debug(e.logger).Log(
 			"msg", "GetSystemInfo() successful",
-			"vswitch_name", e.Client.Database.Vswitch.Name,
 			"system_id", e.Client.System.ID,
 		)
 	}
 
 	components := []string{
-		"ovsdb-server",
 		"ovsdb-server-southbound",
 		"ovsdb-server-southbound-monitoring",
 		"ovsdb-server-northbound",
 		"ovsdb-server-northbound-monitoring",
 		"ovn-northd",
 		"ovn-northd-monitoring",
-		"ovs-vswitchd",
 	}
 	for _, component := range components {
 		p, err := e.Client.GetProcessInfo(component)
@@ -650,11 +645,9 @@ func (e *Exporter) GatherMetrics() {
 	}
 
 	components = []string{
-		"ovsdb-server",
 		"ovsdb-server-southbound",
 		"ovsdb-server-northbound",
 		"ovn-northd",
-		"ovs-vswitchd",
 	}
 	for _, component := range components {
 		level.Debug(e.logger).Log(
@@ -1000,7 +993,6 @@ func (e *Exporter) GatherMetrics() {
 	southClusterID := ""
 
 	components = []string{
-		"ovsdb-server",
 		"ovsdb-server-southbound",
 		"ovsdb-server-northbound",
 	}
@@ -1455,9 +1447,9 @@ func (e *Exporter) GatherMetrics() {
 		info,
 		prometheus.GaugeValue,
 		1,
-		e.Client.System.ID, e.Client.System.RunDir, e.Client.System.Hostname,
+		e.Client.System.ID, e.Client.System.Hostname,
 		e.Client.System.Type, e.Client.System.Version,
-		e.Client.Database.Vswitch.Version, e.Client.Database.Vswitch.Schema.Version,
+		e.Client.Database.Northbound.Schema.Version, e.Client.Database.Southbound.Schema.Version,
 	))
 
 	e.metrics = append(e.metrics, prometheus.MustNewConstMetric(