219 lines
8.8 KiB
Go
219 lines
8.8 KiB
Go
package marathon
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"net"
|
|
"net/http"
|
|
"net/url"
|
|
"text/template"
|
|
"time"
|
|
|
|
"github.com/cenkalti/backoff/v4"
|
|
"github.com/gambol99/go-marathon"
|
|
"github.com/sirupsen/logrus"
|
|
ptypes "github.com/traefik/paerser/types"
|
|
"github.com/traefik/traefik/v2/pkg/config/dynamic"
|
|
"github.com/traefik/traefik/v2/pkg/job"
|
|
"github.com/traefik/traefik/v2/pkg/log"
|
|
"github.com/traefik/traefik/v2/pkg/provider"
|
|
"github.com/traefik/traefik/v2/pkg/safe"
|
|
"github.com/traefik/traefik/v2/pkg/types"
|
|
)
|
|
|
|
const (
|
|
// DefaultTemplateRule The default template for the default rule.
|
|
DefaultTemplateRule = "Host(`{{ normalize .Name }}`)"
|
|
traceMaxScanTokenSize = 1024 * 1024
|
|
marathonEventIDs = marathon.EventIDApplications |
|
|
marathon.EventIDAddHealthCheck |
|
|
marathon.EventIDDeploymentSuccess |
|
|
marathon.EventIDDeploymentFailed |
|
|
marathon.EventIDDeploymentInfo |
|
|
marathon.EventIDDeploymentStepSuccess |
|
|
marathon.EventIDDeploymentStepFailed
|
|
)
|
|
|
|
// TaskState denotes the Mesos state a task can have.
|
|
type TaskState string
|
|
|
|
const (
|
|
taskStateRunning TaskState = "TASK_RUNNING"
|
|
taskStateStaging TaskState = "TASK_STAGING"
|
|
)
|
|
|
|
var _ provider.Provider = (*Provider)(nil)
|
|
|
|
// Provider holds configuration of the provider.
|
|
type Provider struct {
|
|
Constraints string `description:"Constraints is an expression that Traefik matches against the application's labels to determine whether to create any route for that application." json:"constraints,omitempty" toml:"constraints,omitempty" yaml:"constraints,omitempty" export:"true"`
|
|
Trace bool `description:"Display additional provider logs." json:"trace,omitempty" toml:"trace,omitempty" yaml:"trace,omitempty" export:"true"`
|
|
Watch bool `description:"Watch provider." json:"watch,omitempty" toml:"watch,omitempty" yaml:"watch,omitempty" export:"true"`
|
|
Endpoint string `description:"Marathon server endpoint. You can also specify multiple endpoint for Marathon." json:"endpoint,omitempty" toml:"endpoint,omitempty" yaml:"endpoint,omitempty"`
|
|
DefaultRule string `description:"Default rule." json:"defaultRule,omitempty" toml:"defaultRule,omitempty" yaml:"defaultRule,omitempty"`
|
|
ExposedByDefault bool `description:"Expose Marathon apps by default." json:"exposedByDefault,omitempty" toml:"exposedByDefault,omitempty" yaml:"exposedByDefault,omitempty" export:"true"`
|
|
DCOSToken string `description:"DCOSToken for DCOS environment, This will override the Authorization header." json:"dcosToken,omitempty" toml:"dcosToken,omitempty" yaml:"dcosToken,omitempty"`
|
|
TLS *types.ClientTLS `description:"Enable TLS support." json:"tls,omitempty" toml:"tls,omitempty" yaml:"tls,omitempty" export:"true"`
|
|
DialerTimeout ptypes.Duration `description:"Set a dialer timeout for Marathon." json:"dialerTimeout,omitempty" toml:"dialerTimeout,omitempty" yaml:"dialerTimeout,omitempty" export:"true"`
|
|
ResponseHeaderTimeout ptypes.Duration `description:"Set a response header timeout for Marathon." json:"responseHeaderTimeout,omitempty" toml:"responseHeaderTimeout,omitempty" yaml:"responseHeaderTimeout,omitempty" export:"true"`
|
|
TLSHandshakeTimeout ptypes.Duration `description:"Set a TLS handshake timeout for Marathon." json:"tlsHandshakeTimeout,omitempty" toml:"tlsHandshakeTimeout,omitempty" yaml:"tlsHandshakeTimeout,omitempty" export:"true"`
|
|
KeepAlive ptypes.Duration `description:"Set a TCP Keep Alive time." json:"keepAlive,omitempty" toml:"keepAlive,omitempty" yaml:"keepAlive,omitempty" export:"true"`
|
|
ForceTaskHostname bool `description:"Force to use the task's hostname." json:"forceTaskHostname,omitempty" toml:"forceTaskHostname,omitempty" yaml:"forceTaskHostname,omitempty" export:"true"`
|
|
Basic *Basic `description:"Enable basic authentication." json:"basic,omitempty" toml:"basic,omitempty" yaml:"basic,omitempty" export:"true"`
|
|
RespectReadinessChecks bool `description:"Filter out tasks with non-successful readiness checks during deployments." json:"respectReadinessChecks,omitempty" toml:"respectReadinessChecks,omitempty" yaml:"respectReadinessChecks,omitempty" export:"true"`
|
|
readyChecker *readinessChecker
|
|
marathonClient marathon.Marathon
|
|
defaultRuleTpl *template.Template
|
|
}
|
|
|
|
// SetDefaults sets the default values.
|
|
func (p *Provider) SetDefaults() {
|
|
p.Watch = true
|
|
p.Endpoint = "http://127.0.0.1:8080"
|
|
p.ExposedByDefault = true
|
|
p.DialerTimeout = ptypes.Duration(5 * time.Second)
|
|
p.ResponseHeaderTimeout = ptypes.Duration(60 * time.Second)
|
|
p.TLSHandshakeTimeout = ptypes.Duration(5 * time.Second)
|
|
p.KeepAlive = ptypes.Duration(10 * time.Second)
|
|
p.DefaultRule = DefaultTemplateRule
|
|
}
|
|
|
|
// Basic holds basic authentication specific configurations.
|
|
type Basic struct {
|
|
HTTPBasicAuthUser string `description:"Basic authentication User." json:"httpBasicAuthUser,omitempty" toml:"httpBasicAuthUser,omitempty" yaml:"httpBasicAuthUser,omitempty"`
|
|
HTTPBasicPassword string `description:"Basic authentication Password." json:"httpBasicPassword,omitempty" toml:"httpBasicPassword,omitempty" yaml:"httpBasicPassword,omitempty"`
|
|
}
|
|
|
|
// Init the provider.
|
|
func (p *Provider) Init() error {
|
|
fm := template.FuncMap{
|
|
"strsToItfs": func(values []string) []interface{} {
|
|
var r []interface{}
|
|
for _, v := range values {
|
|
r = append(r, v)
|
|
}
|
|
return r
|
|
},
|
|
}
|
|
|
|
defaultRuleTpl, err := provider.MakeDefaultRuleTemplate(p.DefaultRule, fm)
|
|
if err != nil {
|
|
return fmt.Errorf("error while parsing default rule: %w", err)
|
|
}
|
|
|
|
p.defaultRuleTpl = defaultRuleTpl
|
|
return nil
|
|
}
|
|
|
|
// Provide allows the marathon provider to provide configurations to traefik
|
|
// using the given configuration channel.
|
|
func (p *Provider) Provide(configurationChan chan<- dynamic.Message, pool *safe.Pool) error {
|
|
ctx := log.With(context.Background(), log.Str(log.ProviderName, "marathon"))
|
|
logger := log.FromContext(ctx)
|
|
|
|
operation := func() error {
|
|
confg := marathon.NewDefaultConfig()
|
|
confg.URL = p.Endpoint
|
|
confg.EventsTransport = marathon.EventsTransportSSE
|
|
if p.Trace {
|
|
confg.LogOutput = log.CustomWriterLevel(logrus.DebugLevel, traceMaxScanTokenSize)
|
|
}
|
|
if p.Basic != nil {
|
|
confg.HTTPBasicAuthUser = p.Basic.HTTPBasicAuthUser
|
|
confg.HTTPBasicPassword = p.Basic.HTTPBasicPassword
|
|
}
|
|
var rc *readinessChecker
|
|
if p.RespectReadinessChecks {
|
|
logger.Debug("Enabling Marathon readiness checker")
|
|
rc = defaultReadinessChecker(p.Trace)
|
|
}
|
|
p.readyChecker = rc
|
|
|
|
if len(p.DCOSToken) > 0 {
|
|
confg.DCOSToken = p.DCOSToken
|
|
}
|
|
TLSConfig, err := p.TLS.CreateTLSConfig(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
confg.HTTPClient = &http.Client{
|
|
Transport: &http.Transport{
|
|
DialContext: (&net.Dialer{
|
|
KeepAlive: time.Duration(p.KeepAlive),
|
|
Timeout: time.Duration(p.DialerTimeout),
|
|
}).DialContext,
|
|
ResponseHeaderTimeout: time.Duration(p.ResponseHeaderTimeout),
|
|
TLSHandshakeTimeout: time.Duration(p.TLSHandshakeTimeout),
|
|
TLSClientConfig: TLSConfig,
|
|
},
|
|
}
|
|
client, err := marathon.NewClient(confg)
|
|
if err != nil {
|
|
logger.Errorf("Failed to create a client for marathon, error: %s", err)
|
|
return err
|
|
}
|
|
p.marathonClient = client
|
|
|
|
if p.Watch {
|
|
update, err := client.AddEventsListener(marathonEventIDs)
|
|
if err != nil {
|
|
logger.Errorf("Failed to register for events, %s", err)
|
|
return err
|
|
}
|
|
pool.GoCtx(func(ctxPool context.Context) {
|
|
defer close(update)
|
|
for {
|
|
select {
|
|
case <-ctxPool.Done():
|
|
return
|
|
case event := <-update:
|
|
logger.Debugf("Received provider event %s", event)
|
|
|
|
conf := p.getConfigurations(ctx)
|
|
if conf != nil {
|
|
configurationChan <- dynamic.Message{
|
|
ProviderName: "marathon",
|
|
Configuration: conf,
|
|
}
|
|
}
|
|
}
|
|
}
|
|
})
|
|
}
|
|
|
|
configuration := p.getConfigurations(ctx)
|
|
configurationChan <- dynamic.Message{
|
|
ProviderName: "marathon",
|
|
Configuration: configuration,
|
|
}
|
|
return nil
|
|
}
|
|
|
|
notify := func(err error, time time.Duration) {
|
|
logger.Errorf("Provider connection error %+v, retrying in %s", err, time)
|
|
}
|
|
err := backoff.RetryNotify(safe.OperationWithRecover(operation), job.NewBackOff(backoff.NewExponentialBackOff()), notify)
|
|
if err != nil {
|
|
logger.Errorf("Cannot connect to Provider server: %+v", err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (p *Provider) getConfigurations(ctx context.Context) *dynamic.Configuration {
|
|
applications, err := p.getApplications()
|
|
if err != nil {
|
|
log.FromContext(ctx).Errorf("Failed to retrieve Marathon applications: %v", err)
|
|
return nil
|
|
}
|
|
|
|
return p.buildConfiguration(ctx, applications)
|
|
}
|
|
|
|
func (p *Provider) getApplications() (*marathon.Applications, error) {
|
|
v := url.Values{}
|
|
v.Add("embed", "apps.tasks")
|
|
v.Add("embed", "apps.deployments")
|
|
v.Add("embed", "apps.readiness")
|
|
|
|
return p.marathonClient.Applications(v)
|
|
}
|