traefik/integration/k8s_test.go

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package integration
import (
"bytes"
"encoding/json"
"errors"
"flag"
"fmt"
"io"
"io/ioutil"
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"net/http"
"os"
"path/filepath"
"regexp"
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"time"
"github.com/go-check/check"
"github.com/pmezard/go-difflib/difflib"
"github.com/traefik/traefik/v2/integration/try"
"github.com/traefik/traefik/v2/pkg/api"
"github.com/traefik/traefik/v2/pkg/log"
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checker "github.com/vdemeester/shakers"
)
var updateExpected = flag.Bool("update_expected", false, "Update expected files in testdata")
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// K8sSuite tests suite.
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type K8sSuite struct{ BaseSuite }
func (s *K8sSuite) SetUpSuite(c *check.C) {
s.createComposeProject(c, "k8s")
s.composeProject.Start(c)
abs, err := filepath.Abs("./fixtures/k8s/config.skip/kubeconfig.yaml")
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c.Assert(err, checker.IsNil)
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err = try.Do(60*time.Second, func() error {
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_, err := os.Stat(abs)
return err
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})
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c.Assert(err, checker.IsNil)
err = os.Setenv("KUBECONFIG", abs)
c.Assert(err, checker.IsNil)
}
func (s *K8sSuite) TearDownSuite(c *check.C) {
s.composeProject.Stop(c)
generatedFiles := []string{
"./fixtures/k8s/config.skip/kubeconfig.yaml",
"./fixtures/k8s/config.skip/k3s.log",
"./fixtures/k8s/coredns.yaml",
"./fixtures/k8s/rolebindings.yaml",
"./fixtures/k8s/traefik.yaml",
"./fixtures/k8s/ccm.yaml",
}
for _, filename := range generatedFiles {
err := os.Remove(filename)
if err != nil {
log.WithoutContext().Warning(err)
}
}
}
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func (s *K8sSuite) TestIngressConfiguration(c *check.C) {
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cmd, display := s.traefikCmd(withConfigFile("fixtures/k8s_default.toml"))
defer display(c)
err := cmd.Start()
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c.Assert(err, checker.IsNil)
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defer s.killCmd(cmd)
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testConfiguration(c, "testdata/rawdata-ingress.json", "8080")
}
func (s *K8sSuite) TestIngressLabelSelector(c *check.C) {
cmd, display := s.traefikCmd(withConfigFile("fixtures/k8s_ingress_label_selector.toml"))
defer display(c)
err := cmd.Start()
c.Assert(err, checker.IsNil)
defer s.killCmd(cmd)
testConfiguration(c, "testdata/rawdata-ingress-label-selector.json", "8080")
}
func (s *K8sSuite) TestCRDConfiguration(c *check.C) {
cmd, display := s.traefikCmd(withConfigFile("fixtures/k8s_crd.toml"))
defer display(c)
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err := cmd.Start()
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c.Assert(err, checker.IsNil)
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defer s.killCmd(cmd)
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testConfiguration(c, "testdata/rawdata-crd.json", "8000")
}
func (s *K8sSuite) TestCRDLabelSelector(c *check.C) {
cmd, display := s.traefikCmd(withConfigFile("fixtures/k8s_crd_label_selector.toml"))
defer display(c)
err := cmd.Start()
c.Assert(err, checker.IsNil)
defer s.killCmd(cmd)
testConfiguration(c, "testdata/rawdata-crd-label-selector.json", "8000")
}
func (s *K8sSuite) TestGatewayConfiguration(c *check.C) {
cmd, display := s.traefikCmd(withConfigFile("fixtures/k8s_gateway.toml"))
defer display(c)
err := cmd.Start()
c.Assert(err, checker.IsNil)
defer s.killCmd(cmd)
testConfiguration(c, "testdata/rawdata-gateway.json", "8080")
}
func testConfiguration(c *check.C, path, apiPort string) {
err := try.GetRequest("http://127.0.0.1:"+apiPort+"/api/entrypoints", 20*time.Second, try.BodyContains(`"name":"web"`))
c.Assert(err, checker.IsNil)
expectedJSON := filepath.FromSlash(path)
if *updateExpected {
fi, err := os.Create(expectedJSON)
c.Assert(err, checker.IsNil)
err = fi.Close()
c.Assert(err, checker.IsNil)
}
var buf bytes.Buffer
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err = try.GetRequest("http://127.0.0.1:"+apiPort+"/api/rawdata", 1*time.Minute, try.StatusCodeIs(http.StatusOK), matchesConfig(expectedJSON, &buf))
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if !*updateExpected {
if err != nil {
c.Error(err)
}
return
}
if err != nil {
c.Logf("In file update mode, got expected error: %v", err)
}
var rtRepr api.RunTimeRepresentation
err = json.Unmarshal(buf.Bytes(), &rtRepr)
c.Assert(err, checker.IsNil)
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newJSON, err := json.MarshalIndent(rtRepr, "", "\t")
c.Assert(err, checker.IsNil)
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err = ioutil.WriteFile(expectedJSON, newJSON, 0o644)
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c.Assert(err, checker.IsNil)
c.Errorf("We do not want a passing test in file update mode")
}
func matchesConfig(wantConfig string, buf *bytes.Buffer) try.ResponseCondition {
return func(res *http.Response) error {
body, err := ioutil.ReadAll(res.Body)
if err != nil {
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return fmt.Errorf("failed to read response body: %w", err)
}
if err := res.Body.Close(); err != nil {
return err
}
var obtained api.RunTimeRepresentation
err = json.Unmarshal(body, &obtained)
if err != nil {
return err
}
if buf != nil {
buf.Reset()
if _, err := io.Copy(buf, bytes.NewReader(body)); err != nil {
return err
}
}
got, err := json.MarshalIndent(obtained, "", "\t")
if err != nil {
return err
}
expected, err := ioutil.ReadFile(wantConfig)
if err != nil {
return err
}
// The pods IPs are dynamic, so we cannot predict them,
// which is why we have to ignore them in the comparison.
rxURL := regexp.MustCompile(`"(url|address)":\s+(".*")`)
sanitizedExpected := rxURL.ReplaceAll(expected, []byte(`"$1": "XXXX"`))
sanitizedGot := rxURL.ReplaceAll(got, []byte(`"$1": "XXXX"`))
rxServerStatus := regexp.MustCompile(`"http://.*?":\s+(".*")`)
sanitizedExpected = rxServerStatus.ReplaceAll(sanitizedExpected, []byte(`"http://XXXX": $1`))
sanitizedGot = rxServerStatus.ReplaceAll(sanitizedGot, []byte(`"http://XXXX": $1`))
if bytes.Equal(sanitizedExpected, sanitizedGot) {
return nil
}
diff := difflib.UnifiedDiff{
FromFile: "Expected",
A: difflib.SplitLines(string(sanitizedExpected)),
ToFile: "Got",
B: difflib.SplitLines(string(sanitizedGot)),
Context: 3,
}
text, err := difflib.GetUnifiedDiffString(diff)
if err != nil {
return err
}
return errors.New(text)
}
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}