diff --git a/collector/network_route_linux.go b/collector/network_route_linux.go new file mode 100644 index 00000000..a6eca841 --- /dev/null +++ b/collector/network_route_linux.go @@ -0,0 +1,172 @@ +// Copyright 2020 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build !nonetworkroute + +package collector + +import ( + "fmt" + "net" + "strconv" + + "github.com/go-kit/kit/log" + "github.com/prometheus/client_golang/prometheus" + "github.com/vishvananda/netlink" +) + +type networkRouteCollector struct { + routeDesc *prometheus.Desc + routesTotalDesc *prometheus.Desc + logger log.Logger +} + +func init() { + registerCollector("network_route", defaultDisabled, NewNetworkRouteCollector) +} + +// NewSystemdCollector returns a new Collector exposing systemd statistics. +func NewNetworkRouteCollector(logger log.Logger) (Collector, error) { + const subsystem = "network" + + routeDesc := prometheus.NewDesc( + prometheus.BuildFQName(namespace, subsystem, "route"), + "network routing table", []string{"if", "src", "dest", "gw", "priority", "proto", "weight"}, nil, + ) + routeTotalDesc := prometheus.NewDesc( + prometheus.BuildFQName(namespace, subsystem, "routes_total"), + "network total routes", []string{"if"}, nil, + ) + + return &networkRouteCollector{ + routeDesc: routeDesc, + routesTotalDesc: routeTotalDesc, + logger: logger, + }, nil +} + +func (n networkRouteCollector) Update(ch chan<- prometheus.Metric) error { + deviceRoutes := make(map[string]int) + + routes, err := netlink.RouteList(nil, netlink.FAMILY_V4) + if err != nil { + return fmt.Errorf("couldn't get route list: %w", err) + } + + for _, route := range routes { + if len(route.MultiPath) != 0 { // route has multipath + for _, nexthop := range route.MultiPath { + link, err := netlink.LinkByIndex(nexthop.LinkIndex) + if err != nil { + return fmt.Errorf("couldn't get link by index: %w", err) + } + labels := []string{ + link.Attrs().Name, // if + networkRouteIPToString(route.Src), // src + networkRouteIPNetToString(route.Dst), // dest + networkRouteIPToString(nexthop.Gw), // gw + strconv.Itoa(route.Priority), // priority(metrics) + networkRouteProtocolToString(route.Protocol), // proto + strconv.Itoa(nexthop.Hops + 1), // weight + } + ch <- prometheus.MustNewConstMetric(n.routeDesc, prometheus.GaugeValue, 1, labels...) + deviceRoutes[link.Attrs().Name]++ + } + } else { + link, err := netlink.LinkByIndex(route.LinkIndex) + if err != nil { + return fmt.Errorf("couldn't get link by index: %w", err) + } + labels := []string{ + link.Attrs().Name, // if + networkRouteIPToString(route.Src), // src + networkRouteIPNetToString(route.Dst), // dest + networkRouteIPToString(route.Gw), // gw + strconv.Itoa(route.Priority), // priority(metrics) + networkRouteProtocolToString(route.Protocol), // proto + "", // weight + } + ch <- prometheus.MustNewConstMetric(n.routeDesc, prometheus.GaugeValue, 1, labels...) + deviceRoutes[link.Attrs().Name]++ + } + } + + for dev, total := range deviceRoutes { + ch <- prometheus.MustNewConstMetric(n.routesTotalDesc, prometheus.GaugeValue, float64(total), dev) + } + + return nil +} + +func networkRouteIPNetToString(ip *net.IPNet) string { + if ip == nil { + return "default" + } + return ip.String() +} + +func networkRouteIPToString(ip net.IP) string { + if len(ip) == 0 { + return "" + } + return ip.String() +} + +func networkRouteProtocolToString(protocol int) string { + // from linux kernel 'include/uapi/linux/rtnetlink.h' + switch protocol { + case 0: + return "unspec" + case 1: + return "redirect" + case 2: + return "kernel" + case 3: + return "boot" + case 4: + return "static" + case 8: + return "gated" + case 9: + return "ra" + case 10: + return "mrt" + case 11: + return "zebra" + case 12: + return "bird" + case 13: + return "dnrouted" + case 14: + return "xorp" + case 15: + return "ntk" + case 16: + return "dhcp" + case 17: + return "mrouted" + case 42: + return "babel" + case 186: + return "bgp" + case 187: + return "isis" + case 188: + return "ospf" + case 189: + return "rip" + case 192: + return "eigrp" + } + return "unknown" +} diff --git a/go.mod b/go.mod index 8893ce3d..84a48384 100644 --- a/go.mod +++ b/go.mod @@ -19,6 +19,7 @@ require ( github.com/prometheus/procfs v0.2.0 github.com/siebenmann/go-kstat v0.0.0-20200303194639-4e8294f9e9d5 github.com/soundcloud/go-runit v0.0.0-20150630195641-06ad41a06c4a + github.com/vishvananda/netlink v1.1.0 go.uber.org/multierr v1.5.0 // indirect golang.org/x/crypto v0.0.0-20200820211705-5c72a883971a golang.org/x/lint v0.0.0-20200302205851-738671d3881b // indirect diff --git a/go.sum b/go.sum index fe1a9550..e828d2a4 100644 --- a/go.sum +++ b/go.sum @@ -329,6 +329,10 @@ github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81P github.com/tmc/grpc-websocket-proxy v0.0.0-20170815181823-89b8d40f7ca8/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U= github.com/urfave/cli v1.20.0/go.mod h1:70zkFmudgCuE/ngEzBv17Jvp/497gISqfk5gWijbERA= github.com/urfave/cli v1.22.1/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0= +github.com/vishvananda/netlink v1.1.0 h1:1iyaYNBLmP6L0220aDnYQpo1QEV4t4hJ+xEEhhJH8j0= +github.com/vishvananda/netlink v1.1.0/go.mod h1:cTgwzPIzzgDAYoQrMm0EdrjRUBkTqKYppBueQtXaqoE= +github.com/vishvananda/netns v0.0.0-20191106174202-0a2b9b5464df h1:OviZH7qLw/7ZovXvuNyL3XQl8UFofeikI1NW1Gypu7k= +github.com/vishvananda/netns v0.0.0-20191106174202-0a2b9b5464df/go.mod h1:JP3t17pCcGlemwknint6hfoeCVQrEMVwxRLRjXpq+BU= github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q53MR2AWcXfiuqkDkRtnGDLqkBTpCHuJHxtU= github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74= go.etcd.io/bbolt v1.3.3/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU= @@ -427,6 +431,7 @@ golang.org/x/sys v0.0.0-20190411185658-b44545bcd369/go.mod h1:h1NjWce9XRLGQEsW7w golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20190502145724-3ef323f4f1fd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20190606203320-7fc4e5ec1444/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20190726091711-fc99dfbffb4e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20190826190057-c7b8b68b1456/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20190902133755-9109b7679e13 h1:tdsQdquKbTNMsSZLqnLELJGzCANp9oXhu6zFBW6ODx4=