The Prometheus monitoring system and time series database.
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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 marathon
import (
"context"
"errors"
"io"
"net/http"
"net/http/httptest"
"testing"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/common/model"
"github.com/stretchr/testify/require"
"github.com/prometheus/prometheus/discovery"
"github.com/prometheus/prometheus/discovery/targetgroup"
)
var (
marathonValidLabel = map[string]string{"prometheus": "yes"}
testServers = []string{"http://localhost:8080"}
)
func testConfig() SDConfig {
return SDConfig{Servers: testServers}
}
func testUpdateServices(client appListClient) ([]*targetgroup.Group, error) {
cfg := testConfig()
reg := prometheus.NewRegistry()
refreshMetrics := discovery.NewRefreshMetrics(reg)
metrics := cfg.NewDiscovererMetrics(reg, refreshMetrics)
err := metrics.Register()
if err != nil {
return nil, err
}
defer metrics.Unregister()
defer refreshMetrics.Unregister()
md, err := NewDiscovery(cfg, nil, metrics)
if err != nil {
return nil, err
}
if client != nil {
md.appsClient = client
}
return md.refresh(context.Background())
}
func TestMarathonSDHandleError(t *testing.T) {
var (
errTesting = errors.New("testing failure")
client = func(_ context.Context, _ *http.Client, _ string) (*appList, error) {
return nil, errTesting
}
)
tgs, err := testUpdateServices(client)
require.ErrorIs(t, err, errTesting)
require.Empty(t, tgs, "Expected no target groups.")
}
func TestMarathonSDEmptyList(t *testing.T) {
client := func(_ context.Context, _ *http.Client, _ string) (*appList, error) { return &appList{}, nil }
tgs, err := testUpdateServices(client)
require.NoError(t, err)
require.Empty(t, tgs, "Expected no target groups.")
}
func marathonTestAppList(labels map[string]string, runningTasks int) *appList {
var (
t = task{
ID: "test-task-1",
Host: "mesos-slave1",
}
docker = dockerContainer{
Image: "repo/image:tag",
}
portMappings = []portMapping{
{Labels: labels, HostPort: 31000},
}
container = container{Docker: docker, PortMappings: portMappings}
a = app{
ID: "test-service",
Tasks: []task{t},
RunningTasks: runningTasks,
Labels: labels,
Container: container,
}
)
return &appList{
Apps: []app{a},
}
}
func TestMarathonSDSendGroup(t *testing.T) {
client := func(_ context.Context, _ *http.Client, _ string) (*appList, error) {
return marathonTestAppList(marathonValidLabel, 1), nil
}
tgs, err := testUpdateServices(client)
require.NoError(t, err)
require.Len(t, tgs, 1, "Expected 1 target group.")
tg := tgs[0]
require.Equal(t, "test-service", tg.Source, "Wrong target group name.")
require.Len(t, tg.Targets, 1, "Expected 1 target.")
tgt := tg.Targets[0]
require.Equal(t, "mesos-slave1:31000", string(tgt[model.AddressLabel]), "Wrong target address.")
require.Equal(t, "yes", string(tgt[model.LabelName(portMappingLabelPrefix+"prometheus")]), "Wrong portMappings label from the first port.")
}
func TestMarathonSDRemoveApp(t *testing.T) {
cfg := testConfig()
reg := prometheus.NewRegistry()
refreshMetrics := discovery.NewRefreshMetrics(reg)
metrics := cfg.NewDiscovererMetrics(reg, refreshMetrics)
require.NoError(t, metrics.Register())
defer metrics.Unregister()
defer refreshMetrics.Unregister()
md, err := NewDiscovery(cfg, nil, metrics)
require.NoError(t, err)
md.appsClient = func(_ context.Context, _ *http.Client, _ string) (*appList, error) {
return marathonTestAppList(marathonValidLabel, 1), nil
}
tgs, err := md.refresh(context.Background())
require.NoError(t, err, "Got error on first update.")
require.Len(t, tgs, 1, "Expected 1 targetgroup.")
tg1 := tgs[0]
md.appsClient = func(_ context.Context, _ *http.Client, _ string) (*appList, error) {
return marathonTestAppList(marathonValidLabel, 0), nil
}
tgs, err = md.refresh(context.Background())
require.NoError(t, err, "Got error on second update.")
require.Len(t, tgs, 1, "Expected 1 targetgroup.")
tg2 := tgs[0]
require.NotEmpty(t, tg2.Targets, "Got a non-empty target set.")
require.Equal(t, tg1.Source, tg2.Source, "Source is different.")
}
func marathonTestAppListWithMultiplePorts(labels map[string]string, runningTasks int) *appList {
var (
t = task{
ID: "test-task-1",
Host: "mesos-slave1",
}
docker = dockerContainer{
Image: "repo/image:tag",
}
portMappings = []portMapping{
{Labels: labels, HostPort: 31000},
{Labels: make(map[string]string), HostPort: 32000},
}
container = container{Docker: docker, PortMappings: portMappings}
a = app{
ID: "test-service",
Tasks: []task{t},
RunningTasks: runningTasks,
Labels: labels,
Container: container,
}
)
return &appList{
Apps: []app{a},
}
}
func TestMarathonSDSendGroupWithMultiplePort(t *testing.T) {
client := func(_ context.Context, _ *http.Client, _ string) (*appList, error) {
return marathonTestAppListWithMultiplePorts(marathonValidLabel, 1), nil
}
tgs, err := testUpdateServices(client)
require.NoError(t, err)
require.Len(t, tgs, 1, "Expected 1 target group.")
tg := tgs[0]
require.Equal(t, "test-service", tg.Source, "Wrong target group name.")
require.Len(t, tg.Targets, 2, "Wrong number of targets.")
tgt := tg.Targets[0]
require.Equal(t, "mesos-slave1:31000", string(tgt[model.AddressLabel]), "Wrong target address.")
require.Equal(t, "yes", string(tgt[model.LabelName(portMappingLabelPrefix+"prometheus")]),
"Wrong portMappings label from the first port: %s", tgt[model.AddressLabel])
tgt = tg.Targets[1]
require.Equal(t, "mesos-slave1:32000", string(tgt[model.AddressLabel]), "Wrong target address.")
require.Equal(t, "", string(tgt[model.LabelName(portMappingLabelPrefix+"prometheus")]),
"Wrong portMappings label from the second port: %s", tgt[model.AddressLabel])
}
func marathonTestZeroTaskPortAppList(labels map[string]string, runningTasks int) *appList {
var (
t = task{
ID: "test-task-2",
Host: "mesos-slave-2",
Ports: []uint32{},
}
docker = dockerContainer{Image: "repo/image:tag"}
container = container{Docker: docker}
a = app{
ID: "test-service-zero-ports",
Tasks: []task{t},
RunningTasks: runningTasks,
Labels: labels,
Container: container,
}
)
return &appList{
Apps: []app{a},
}
}
func TestMarathonZeroTaskPorts(t *testing.T) {
client := func(_ context.Context, _ *http.Client, _ string) (*appList, error) {
return marathonTestZeroTaskPortAppList(marathonValidLabel, 1), nil
}
tgs, err := testUpdateServices(client)
require.NoError(t, err)
require.Len(t, tgs, 1, "Expected 1 target group.")
tg := tgs[0]
require.Equal(t, "test-service-zero-ports", tg.Source, "Wrong target group name.")
require.Empty(t, tg.Targets, "Wrong number of targets.")
}
func Test500ErrorHttpResponseWithValidJSONBody(t *testing.T) {
// Simulate 500 error with a valid JSON response.
respHandler := func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusInternalServerError)
w.Header().Set("Content-Type", "application/json")
io.WriteString(w, `{}`)
}
// Create a test server with mock HTTP handler.
ts := httptest.NewServer(http.HandlerFunc(respHandler))
defer ts.Close()
// Execute test case and validate behavior.
_, err := testUpdateServices(nil)
require.Error(t, err, "Expected error for 5xx HTTP response from marathon server.")
}
func marathonTestAppListWithPortDefinitions(labels map[string]string, runningTasks int) *appList {
var (
t = task{
ID: "test-task-1",
Host: "mesos-slave1",
// Auto-generated ports when requirePorts is false
Ports: []uint32{1234, 5678},
}
docker = dockerContainer{
Image: "repo/image:tag",
}
container = container{Docker: docker}
a = app{
ID: "test-service",
Tasks: []task{t},
RunningTasks: runningTasks,
Labels: labels,
Container: container,
PortDefinitions: []portDefinition{
{Labels: make(map[string]string), Port: 31000},
{Labels: labels, Port: 32000},
},
RequirePorts: false, // default
}
)
return &appList{
Apps: []app{a},
}
}
func TestMarathonSDSendGroupWithPortDefinitions(t *testing.T) {
client := func(_ context.Context, _ *http.Client, _ string) (*appList, error) {
return marathonTestAppListWithPortDefinitions(marathonValidLabel, 1), nil
}
tgs, err := testUpdateServices(client)
require.NoError(t, err)
require.Len(t, tgs, 1, "Expected 1 target group.")
tg := tgs[0]
require.Equal(t, "test-service", tg.Source, "Wrong target group name.")
require.Len(t, tg.Targets, 2, "Wrong number of targets.")
tgt := tg.Targets[0]
require.Equal(t, "mesos-slave1:1234", string(tgt[model.AddressLabel]), "Wrong target address.")
require.Equal(t, "", string(tgt[model.LabelName(portMappingLabelPrefix+"prometheus")]),
"Wrong portMappings label from the first port.")
require.Equal(t, "", string(tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")]),
"Wrong portDefinitions label from the first port.")
tgt = tg.Targets[1]
require.Equal(t, "mesos-slave1:5678", string(tgt[model.AddressLabel]), "Wrong target address.")
require.Empty(t, tgt[model.LabelName(portMappingLabelPrefix+"prometheus")], "Wrong portMappings label from the second port.")
require.Equal(t, "yes", string(tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")]), "Wrong portDefinitions label from the second port.")
}
func marathonTestAppListWithPortDefinitionsRequirePorts(labels map[string]string, runningTasks int) *appList {
var (
t = task{
ID: "test-task-1",
Host: "mesos-slave1",
Ports: []uint32{31000, 32000},
}
docker = dockerContainer{
Image: "repo/image:tag",
}
container = container{Docker: docker}
a = app{
ID: "test-service",
Tasks: []task{t},
RunningTasks: runningTasks,
Labels: labels,
Container: container,
PortDefinitions: []portDefinition{
{Labels: make(map[string]string), Port: 31000},
{Labels: labels, Port: 32000},
},
RequirePorts: true,
}
)
return &appList{
Apps: []app{a},
}
}
func TestMarathonSDSendGroupWithPortDefinitionsRequirePorts(t *testing.T) {
client := func(_ context.Context, _ *http.Client, _ string) (*appList, error) {
return marathonTestAppListWithPortDefinitionsRequirePorts(marathonValidLabel, 1), nil
}
tgs, err := testUpdateServices(client)
require.NoError(t, err)
require.Len(t, tgs, 1, "Expected 1 target group.")
tg := tgs[0]
require.Equal(t, "test-service", tg.Source, "Wrong target group name.")
require.Len(t, tg.Targets, 2, "Wrong number of targets.")
tgt := tg.Targets[0]
require.Equal(t, "mesos-slave1:31000", string(tgt[model.AddressLabel]), "Wrong target address.")
require.Equal(t, "", string(tgt[model.LabelName(portMappingLabelPrefix+"prometheus")]), "Wrong portMappings label from the first port.")
require.Equal(t, "", string(tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")]), "Wrong portDefinitions label from the first port.")
tgt = tg.Targets[1]
require.Equal(t, "mesos-slave1:32000", string(tgt[model.AddressLabel]), "Wrong target address.")
require.Equal(t, "", string(tgt[model.LabelName(portMappingLabelPrefix+"prometheus")]), "Wrong portMappings label from the second port.")
require.Equal(t, "yes", string(tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")]), "Wrong portDefinitions label from the second port.")
}
func marathonTestAppListWithPorts(labels map[string]string, runningTasks int) *appList {
var (
t = task{
ID: "test-task-1",
Host: "mesos-slave1",
Ports: []uint32{31000, 32000},
}
docker = dockerContainer{
Image: "repo/image:tag",
}
container = container{Docker: docker}
a = app{
ID: "test-service",
Tasks: []task{t},
RunningTasks: runningTasks,
Labels: labels,
Container: container,
}
)
return &appList{
Apps: []app{a},
}
}
func TestMarathonSDSendGroupWithPorts(t *testing.T) {
client := func(_ context.Context, _ *http.Client, _ string) (*appList, error) {
return marathonTestAppListWithPorts(marathonValidLabel, 1), nil
}
tgs, err := testUpdateServices(client)
require.NoError(t, err)
require.Len(t, tgs, 1, "Expected 1 target group.")
tg := tgs[0]
require.Equal(t, "test-service", tg.Source, "Wrong target group name.")
require.Len(t, tg.Targets, 2, "Wrong number of targets.")
tgt := tg.Targets[0]
require.Equal(t, "mesos-slave1:31000", string(tgt[model.AddressLabel]), "Wrong target address.")
require.Equal(t, "", string(tgt[model.LabelName(portMappingLabelPrefix+"prometheus")]), "Wrong portMappings label from the first port.")
require.Equal(t, "", string(tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")]), "Wrong portDefinitions label from the first port.")
tgt = tg.Targets[1]
require.Equal(t, "mesos-slave1:32000", string(tgt[model.AddressLabel]), "Wrong target address.")
require.Equal(t, "", string(tgt[model.LabelName(portMappingLabelPrefix+"prometheus")]), "Wrong portMappings label from the second port.")
require.Equal(t, "", string(tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")]), "Wrong portDefinitions label from the second port.")
}
func marathonTestAppListWithContainerPortMappings(labels map[string]string, runningTasks int) *appList {
var (
t = task{
ID: "test-task-1",
Host: "mesos-slave1",
Ports: []uint32{
12345, // 'Automatically-generated' port
32000,
},
}
docker = dockerContainer{
Image: "repo/image:tag",
}
container = container{
Docker: docker,
PortMappings: []portMapping{
{Labels: labels, HostPort: 0},
{Labels: make(map[string]string), HostPort: 32000},
},
}
a = app{
ID: "test-service",
Tasks: []task{t},
RunningTasks: runningTasks,
Labels: labels,
Container: container,
}
)
return &appList{
Apps: []app{a},
}
}
func TestMarathonSDSendGroupWithContainerPortMappings(t *testing.T) {
client := func(_ context.Context, _ *http.Client, _ string) (*appList, error) {
return marathonTestAppListWithContainerPortMappings(marathonValidLabel, 1), nil
}
tgs, err := testUpdateServices(client)
require.NoError(t, err)
require.Len(t, tgs, 1, "Expected 1 target group.")
tg := tgs[0]
require.Equal(t, "test-service", tg.Source, "Wrong target group name.")
require.Len(t, tg.Targets, 2, "Wrong number of targets.")
tgt := tg.Targets[0]
require.Equal(t, "mesos-slave1:12345", string(tgt[model.AddressLabel]), "Wrong target address.")
require.Equal(t, "yes", string(tgt[model.LabelName(portMappingLabelPrefix+"prometheus")]), "Wrong portMappings label from the first port.")
require.Equal(t, "", string(tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")]), "Wrong portDefinitions label from the first port.")
tgt = tg.Targets[1]
require.Equal(t, "mesos-slave1:32000", string(tgt[model.AddressLabel]), "Wrong target address.")
require.Equal(t, "", string(tgt[model.LabelName(portMappingLabelPrefix+"prometheus")]), "Wrong portMappings label from the second port.")
require.Equal(t, "", string(tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")]), "Wrong portDefinitions label from the second port.")
}
func marathonTestAppListWithDockerContainerPortMappings(labels map[string]string, runningTasks int) *appList {
var (
t = task{
ID: "test-task-1",
Host: "mesos-slave1",
Ports: []uint32{
31000,
12345, // 'Automatically-generated' port
},
}
docker = dockerContainer{
Image: "repo/image:tag",
PortMappings: []portMapping{
{Labels: labels, HostPort: 31000},
{Labels: make(map[string]string), HostPort: 0},
},
}
container = container{
Docker: docker,
}
a = app{
ID: "test-service",
Tasks: []task{t},
RunningTasks: runningTasks,
Labels: labels,
Container: container,
}
)
return &appList{
Apps: []app{a},
}
}
func TestMarathonSDSendGroupWithDockerContainerPortMappings(t *testing.T) {
client := func(_ context.Context, _ *http.Client, _ string) (*appList, error) {
return marathonTestAppListWithDockerContainerPortMappings(marathonValidLabel, 1), nil
}
tgs, err := testUpdateServices(client)
require.NoError(t, err)
require.Len(t, tgs, 1, "Expected 1 target group.")
tg := tgs[0]
require.Equal(t, "test-service", tg.Source, "Wrong target group name.")
require.Len(t, tg.Targets, 2, "Wrong number of targets.")
tgt := tg.Targets[0]
require.Equal(t, "mesos-slave1:31000", string(tgt[model.AddressLabel]), "Wrong target address.")
require.Equal(t, "yes", string(tgt[model.LabelName(portMappingLabelPrefix+"prometheus")]), "Wrong portMappings label from the first port.")
require.Equal(t, "", string(tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")]), "Wrong portDefinitions label from the first port.")
tgt = tg.Targets[1]
require.Equal(t, "mesos-slave1:12345", string(tgt[model.AddressLabel]), "Wrong target address.")
require.Equal(t, "", string(tgt[model.LabelName(portMappingLabelPrefix+"prometheus")]), "Wrong portMappings label from the second port.")
require.Equal(t, "", string(tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")]), "Wrong portDefinitions label from the second port.")
}
func marathonTestAppListWithContainerNetworkAndPortMappings(labels map[string]string, runningTasks int) *appList {
var (
t = task{
ID: "test-task-1",
Host: "mesos-slave1",
IPAddresses: []ipAddress{
{Address: "1.2.3.4"},
},
}
docker = dockerContainer{
Image: "repo/image:tag",
}
portMappings = []portMapping{
{Labels: labels, ContainerPort: 8080, HostPort: 31000},
{Labels: make(map[string]string), ContainerPort: 1234, HostPort: 32000},
}
container = container{
Docker: docker,
PortMappings: portMappings,
}
networks = []network{
{Mode: "container", Name: "test-network"},
}
a = app{
ID: "test-service",
Tasks: []task{t},
RunningTasks: runningTasks,
Labels: labels,
Container: container,
Networks: networks,
}
)
return &appList{
Apps: []app{a},
}
}
func TestMarathonSDSendGroupWithContainerNetworkAndPortMapping(t *testing.T) {
client := func(_ context.Context, _ *http.Client, _ string) (*appList, error) {
return marathonTestAppListWithContainerNetworkAndPortMappings(marathonValidLabel, 1), nil
}
tgs, err := testUpdateServices(client)
require.NoError(t, err)
require.Len(t, tgs, 1, "Expected 1 target group.")
tg := tgs[0]
require.Equal(t, "test-service", tg.Source, "Wrong target group name.")
require.Len(t, tg.Targets, 2, "Wrong number of targets.")
tgt := tg.Targets[0]
require.Equal(t, "1.2.3.4:8080", string(tgt[model.AddressLabel]), "Wrong target address.")
require.Equal(t, "yes", string(tgt[model.LabelName(portMappingLabelPrefix+"prometheus")]), "Wrong portMappings label from the first port.")
require.Equal(t, "", string(tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")]), "Wrong portDefinitions label from the first port.")
tgt = tg.Targets[1]
require.Equal(t, "1.2.3.4:1234", string(tgt[model.AddressLabel]), "Wrong target address.")
require.Equal(t, "", string(tgt[model.LabelName(portMappingLabelPrefix+"prometheus")]), "Wrong portMappings label from the second port.")
require.Equal(t, "", string(tgt[model.LabelName(portDefinitionLabelPrefix+"prometheus")]), "Wrong portDefinitions label from the second port.")
}