traefik/integration/marathon_test.go

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package integration
import (
"fmt"
"net/http"
"os"
"time"
"github.com/containous/traefik/integration/try"
"github.com/containous/traefik/types"
marathon "github.com/gambol99/go-marathon"
"github.com/go-check/check"
checker "github.com/vdemeester/shakers"
)
const (
containerNameMesosSlave = "mesos-slave"
containerNameMarathon = "marathon"
)
// Marathon test suites (using libcompose)
type MarathonSuite struct {
BaseSuite
marathonURL string
}
func (s *MarathonSuite) SetUpSuite(c *check.C) {
s.createComposeProject(c, "marathon")
s.composeProject.Start(c)
marathonIPAddr := s.composeProject.Container(c, containerNameMarathon).NetworkSettings.IPAddress
c.Assert(marathonIPAddr, checker.Not(checker.HasLen), 0)
s.marathonURL = "http://" + marathonIPAddr + ":8080"
// Wait for Marathon readiness prior to creating the client so that we
// don't run into the "all cluster members down" state right from the
// start.
err := try.GetRequest(s.marathonURL+"/v2/leader", 1*time.Minute, try.StatusCodeIs(http.StatusOK))
c.Assert(err, checker.IsNil)
// Add entry for Mesos slave container IP address in the hosts file so
// that Traefik can properly forward traffic.
// This is necessary as long as we are still using the docker-compose v1
// spec. Once we switch to v2 or higher, we can have both the test/builder
// container and the Mesos slave container join the same custom network and
// enjoy DNS-discoverable container host names.
mesosSlaveIPAddr := s.composeProject.Container(c, containerNameMesosSlave).NetworkSettings.IPAddress
c.Assert(mesosSlaveIPAddr, checker.Not(checker.HasLen), 0)
err = s.extendDockerHostsFile(containerNameMesosSlave, mesosSlaveIPAddr)
c.Assert(err, checker.IsNil)
}
// extendDockerHostsFile extends the hosts file (/etc/hosts) by the given
// host/IP address mapping if we are running inside a container.
func (s *MarathonSuite) extendDockerHostsFile(host, ipAddr string) error {
const hostsFile = "/etc/hosts"
// Determine if the run inside a container. The most reliable way to
// do this is to inject an indicator, which we do in terms of an
// environment variable.
// (See also https://groups.google.com/d/topic/docker-user/JOGE7AnJ3Gw/discussion.)
if os.Getenv("CONTAINER") == "DOCKER" {
// We are running inside a container -- extend the hosts file.
file, err := os.OpenFile(hostsFile, os.O_APPEND|os.O_WRONLY, 0600)
if err != nil {
return err
}
defer file.Close()
if _, err = file.WriteString(fmt.Sprintf("%s\t%s\n", ipAddr, host)); err != nil {
return err
}
}
return nil
}
func (s *MarathonSuite) TestConfigurationUpdate(c *check.C) {
// Start Traefik.
file := s.adaptFile(c, "fixtures/marathon/simple.toml", struct {
MarathonURL string
}{s.marathonURL})
defer os.Remove(file)
cmd, output := s.cmdTraefik(withConfigFile(file))
err := cmd.Start()
c.Assert(err, checker.IsNil)
defer cmd.Process.Kill()
// Wait for Traefik to turn ready.
err = try.GetRequest("http://127.0.0.1:8000/", 2*time.Second, try.StatusCodeIs(http.StatusNotFound))
c.Assert(err, checker.IsNil)
// Prepare Marathon client.
config := marathon.NewDefaultConfig()
config.URL = s.marathonURL
client, err := marathon.NewClient(config)
c.Assert(err, checker.IsNil)
// Show the Traefik log if any assertion fails. If the entire test runs
// to a successful completion, we flip the flag at the very end and don't
// display anything.
showTraefikLog := true
defer func() {
if showTraefikLog {
s.displayTraefikLog(c, output)
}
}()
// Create test application to be deployed.
app := marathon.NewDockerApplication().
Name("/whoami").
CPU(0.1).
Memory(32).
AddLabel(types.LabelFrontendRule, "PathPrefix:/service")
app.Container.Docker.Bridged().
Expose(80).
Container("emilevauge/whoami")
// Deploy the test application.
deploy, err := client.UpdateApplication(app, false)
c.Assert(err, checker.IsNil)
// Wait for deployment to complete.
c.Assert(client.WaitOnDeployment(deploy.DeploymentID, 1*time.Minute), checker.IsNil)
// Query application via Traefik.
err = try.GetRequest("http://127.0.0.1:8000/service", 30*time.Second, try.StatusCodeIs(http.StatusOK))
c.Assert(err, checker.IsNil)
showTraefikLog = false
}