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// Copyright 2015 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.
package collector
import (
"errors"
"fmt"
"io/ioutil"
"net/http"
"net/http/httptest"
"strings"
"testing"
"github.com/go-kit/kit/log"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
"gopkg.in/alecthomas/kingpin.v2"
)
func TestIPVSCollector(t *testing.T) {
testcases := []struct {
labels string
expects []string
err error
}{
{
"<none>",
[]string{
prometheus.NewDesc("node_ipvs_connections_total", "The total number of connections made.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_incoming_packets_total", "The total number of incoming packets.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_outgoing_packets_total", "The total number of outgoing packets.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_incoming_bytes_total", "The total amount of incoming data.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_outgoing_bytes_total", "The total amount of outgoing data.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_backend_connections_active", "The current active connections by local and remote address.", []string{"local_address", "local_port", "remote_address", "remote_port", "proto", "local_mark"}, nil).String(),
prometheus.NewDesc("node_ipvs_backend_connections_inactive", "The current inactive connections by local and remote address.", []string{"local_address", "local_port", "remote_address", "remote_port", "proto", "local_mark"}, nil).String(),
prometheus.NewDesc("node_ipvs_backend_weight", "The current backend weight by local and remote address.", []string{"local_address", "local_port", "remote_address", "remote_port", "proto", "local_mark"}, nil).String(),
},
nil,
},
{
"",
[]string{
prometheus.NewDesc("node_ipvs_connections_total", "The total number of connections made.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_incoming_packets_total", "The total number of incoming packets.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_outgoing_packets_total", "The total number of outgoing packets.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_incoming_bytes_total", "The total amount of incoming data.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_outgoing_bytes_total", "The total amount of outgoing data.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_backend_connections_active", "The current active connections by local and remote address.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_backend_connections_inactive", "The current inactive connections by local and remote address.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_backend_weight", "The current backend weight by local and remote address.", nil, nil).String(),
},
nil,
},
{
"local_port",
[]string{
prometheus.NewDesc("node_ipvs_connections_total", "The total number of connections made.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_incoming_packets_total", "The total number of incoming packets.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_outgoing_packets_total", "The total number of outgoing packets.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_incoming_bytes_total", "The total amount of incoming data.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_outgoing_bytes_total", "The total amount of outgoing data.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_backend_connections_active", "The current active connections by local and remote address.", []string{"local_port"}, nil).String(),
prometheus.NewDesc("node_ipvs_backend_connections_inactive", "The current inactive connections by local and remote address.", []string{"local_port"}, nil).String(),
prometheus.NewDesc("node_ipvs_backend_weight", "The current backend weight by local and remote address.", []string{"local_port"}, nil).String(),
},
nil,
},
{
"local_address,local_port",
[]string{
prometheus.NewDesc("node_ipvs_connections_total", "The total number of connections made.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_incoming_packets_total", "The total number of incoming packets.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_outgoing_packets_total", "The total number of outgoing packets.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_incoming_bytes_total", "The total amount of incoming data.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_outgoing_bytes_total", "The total amount of outgoing data.", nil, nil).String(),
prometheus.NewDesc("node_ipvs_backend_connections_active", "The current active connections by local and remote address.", []string{"local_address", "local_port"}, nil).String(),
prometheus.NewDesc("node_ipvs_backend_connections_inactive", "The current inactive connections by local and remote address.", []string{"local_address", "local_port"}, nil).String(),
prometheus.NewDesc("node_ipvs_backend_weight", "The current backend weight by local and remote address.", []string{"local_address", "local_port"}, nil).String(),
},
nil,
},
{
"invalid_label",
nil,
errors.New(`unknown IPVS backend labels: "invalid_label"`),
},
{
"invalid_label,bad_label",
nil,
errors.New(`unknown IPVS backend labels: "bad_label, invalid_label"`),
},
}
for _, test := range testcases {
t.Run(test.labels, func(t *testing.T) {
args := []string{"--path.procfs", "fixtures/proc"}
if test.labels != "<none>" {
args = append(args, "--collector.ipvs.backend-labels="+test.labels)
}
if _, err := kingpin.CommandLine.Parse(args); err != nil {
t.Fatal(err)
}
collector, err := newIPVSCollector(log.NewNopLogger())
if err != nil {
if test.err == nil {
t.Fatal(err)
}
if !strings.Contains(err.Error(), test.err.Error()) {
t.Fatalf("expect error: %v contains %v", err, test.err)
}
return
}
if test.err != nil {
t.Fatalf("expect error: %v but got no error", test.err)
}
sink := make(chan prometheus.Metric)
go func() {
err = collector.Update(sink)
if err != nil {
panic(fmt.Sprintf("failed to update collector: %v", err))
}
}()
for _, expected := range test.expects {
got := (<-sink).Desc().String()
if expected != got {
t.Fatalf("Expected '%s' but got '%s'", expected, got)
}
}
})
}
}
// mock collector
type miniCollector struct {
c Collector
}
func (c miniCollector) Collect(ch chan<- prometheus.Metric) {
c.c.Update(ch)
}
func (c miniCollector) Describe(ch chan<- *prometheus.Desc) {
prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: "fake",
Subsystem: "fake",
Name: "fake",
Help: "fake",
}).Describe(ch)
}
func TestIPVSCollectorResponse(t *testing.T) {
testcases := []struct {
labels string
metricsFile string
}{
{"<none>", "fixtures/ip_vs_result.txt"},
{"", "fixtures/ip_vs_result_lbs_none.txt"},
{"local_port", "fixtures/ip_vs_result_lbs_local_port.txt"},
{"local_address,local_port", "fixtures/ip_vs_result_lbs_local_address_local_port.txt"},
}
for _, test := range testcases {
t.Run(test.labels, func(t *testing.T) {
args := []string{"--path.procfs", "fixtures/proc"}
if test.labels != "<none>" {
args = append(args, "--collector.ipvs.backend-labels="+test.labels)
}
if _, err := kingpin.CommandLine.Parse(args); err != nil {
t.Fatal(err)
}
collector, err := NewIPVSCollector(log.NewNopLogger())
if err != nil {
t.Fatal(err)
}
registry := prometheus.NewRegistry()
registry.MustRegister(miniCollector{c: collector})
rw := httptest.NewRecorder()
promhttp.InstrumentMetricHandler(registry, promhttp.HandlerFor(registry, promhttp.HandlerOpts{})).ServeHTTP(rw, &http.Request{})
wantMetrics, err := ioutil.ReadFile(test.metricsFile)
if err != nil {
t.Fatalf("unable to read input test file %s: %s", test.metricsFile, err)
}
wantLines := strings.Split(string(wantMetrics), "\n")
gotLines := strings.Split(string(rw.Body.String()), "\n")
gotLinesIdx := 0
// Until the Prometheus Go client library offers better testability
// (https://github.com/prometheus/client_golang/issues/58), we simply compare
// verbatim text-format metrics outputs, but ignore any lines we don't have
// in the fixture. Put differently, we are only testing that each line from
// the fixture is present, in the order given.
wantLoop:
for _, want := range wantLines {
for _, got := range gotLines[gotLinesIdx:] {
if want == got {
// this is a line we are interested in, and it is correct
continue wantLoop
} else {
gotLinesIdx++
}
}
// if this point is reached, the line we want was missing
t.Fatalf("Missing expected output line(s), first missing line is %s", want)
}
})
}
}
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