traefik/integration/docker_compose_test.go

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package integration
import (
"encoding/json"
"net/http"
"os"
"strings"
"time"
"github.com/go-check/check"
"github.com/traefik/traefik/v2/integration/try"
"github.com/traefik/traefik/v2/pkg/api"
"github.com/traefik/traefik/v2/pkg/testhelpers"
checker "github.com/vdemeester/shakers"
)
const (
composeProject = "minimal"
)
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// Docker tests suite.
type DockerComposeSuite struct {
BaseSuite
}
func (s *DockerComposeSuite) SetUpSuite(c *check.C) {
s.createComposeProject(c, composeProject)
s.composeProject.Start(c)
}
func (s *DockerComposeSuite) TearDownSuite(c *check.C) {
// shutdown and delete compose project
if s.composeProject != nil {
s.composeProject.Stop(c)
}
}
func (s *DockerComposeSuite) TestComposeScale(c *check.C) {
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serviceCount := 2
composeService := "whoami1"
s.composeProject.Scale(c, composeService, serviceCount)
tempObjects := struct {
DockerHost string
DefaultRule string
}{
DockerHost: s.getDockerHost(),
DefaultRule: "Host(`{{ normalize .Name }}.docker.localhost`)",
}
file := s.adaptFile(c, "fixtures/docker/minimal.toml", tempObjects)
defer os.Remove(file)
cmd, display := s.traefikCmd(withConfigFile(file))
defer display(c)
err := cmd.Start()
c.Assert(err, checker.IsNil)
defer cmd.Process.Kill()
req := testhelpers.MustNewRequest(http.MethodGet, "http://127.0.0.1:8000/whoami", nil)
req.Host = "my.super.host"
_, err = try.ResponseUntilStatusCode(req, 1500*time.Millisecond, http.StatusOK)
c.Assert(err, checker.IsNil)
resp, err := http.Get("http://127.0.0.1:8080/api/rawdata")
c.Assert(err, checker.IsNil)
defer resp.Body.Close()
var rtconf api.RunTimeRepresentation
err = json.NewDecoder(resp.Body).Decode(&rtconf)
c.Assert(err, checker.IsNil)
// check that we have only three routers (the one from this test + 2 unrelated internal ones)
c.Assert(rtconf.Routers, checker.HasLen, 3)
// check that we have only one service (not counting the internal ones) with n servers
services := rtconf.Services
c.Assert(services, checker.HasLen, 4)
for name, service := range services {
if strings.HasSuffix(name, "@internal") {
continue
}
c.Assert(name, checker.Equals, composeService+"-integrationtest"+composeProject+"@docker")
c.Assert(service.LoadBalancer.Servers, checker.HasLen, serviceCount)
// We could break here, but we don't just to keep us honest.
}
}