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Support gRPC healthcheck

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This commit is contained in:
jjacque 2022-09-20 16:54:08 +02:00 committed by GitHub
parent df99a9fb57
commit 033fccccc7
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GPG key ID: 4AEE18F83AFDEB23
14 changed files with 374 additions and 107 deletions
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1
docs/content/reference/dynamic-configuration/docker-labels.yml
View file

@ -154,6 +154,7 @@
- "traefik.http.services.service01.loadbalancer.healthcheck.method=foobar"
- "traefik.http.services.service01.loadbalancer.healthcheck.port=42"
- "traefik.http.services.service01.loadbalancer.healthcheck.scheme=foobar"
- "traefik.http.services.service01.loadbalancer.healthcheck.mode=foobar"
- "traefik.http.services.service01.loadbalancer.healthcheck.timeout=foobar"
- "traefik.http.services.service01.loadbalancer.passhostheader=true"
- "traefik.http.services.service01.loadbalancer.responseforwarding.flushinterval=foobar"

1
docs/content/reference/dynamic-configuration/file.toml
View file

@ -53,6 +53,7 @@
url = "foobar"
[http.services.Service01.loadBalancer.healthCheck]
scheme = "foobar"
mode = "foobar"
path = "foobar"
method = "foobar"
port = 42

1
docs/content/reference/dynamic-configuration/file.yaml
View file

@ -58,6 +58,7 @@ http:
- url: foobar
healthCheck:
scheme: foobar
mode: foobar
path: foobar
method: foobar
port: 42

1
docs/content/reference/dynamic-configuration/kv-ref.md
View file

@ -208,6 +208,7 @@
| `traefik/http/services/Service01/loadBalancer/healthCheck/hostname` | `foobar` |
| `traefik/http/services/Service01/loadBalancer/healthCheck/interval` | `foobar` |
| `traefik/http/services/Service01/loadBalancer/healthCheck/method` | `foobar` |
| `traefik/http/services/Service01/loadBalancer/healthCheck/mode` | `foobar` |
| `traefik/http/services/Service01/loadBalancer/healthCheck/path` | `foobar` |
| `traefik/http/services/Service01/loadBalancer/healthCheck/port` | `42` |
| `traefik/http/services/Service01/loadBalancer/healthCheck/scheme` | `foobar` |

1
docs/content/reference/dynamic-configuration/marathon-labels.json
View file

@ -154,6 +154,7 @@
"traefik.http.services.service01.loadbalancer.healthcheck.method": "foobar",
"traefik.http.services.service01.loadbalancer.healthcheck.port": "42",
"traefik.http.services.service01.loadbalancer.healthcheck.scheme": "foobar",
"traefik.http.services.service01.loadbalancer.healthcheck.mode": "foobar",
"traefik.http.services.service01.loadbalancer.healthcheck.timeout": "foobar",
"traefik.http.services.service01.loadbalancer.passhostheader": "true",
"traefik.http.services.service01.loadbalancer.responseforwarding.flushinterval": "foobar",

4
docs/content/routing/services/index.md
View file

@ -316,7 +316,8 @@ On subsequent requests, to keep the session alive with the same server, the clie
#### Health Check
Configure health check to remove unhealthy servers from the load balancing rotation.
Traefik will consider your servers healthy as long as they return status codes between `2XX` and `3XX` to the health check requests (carried out every `interval`).
Traefik will consider your HTTP(s) servers healthy as long as they return status codes between `2XX` and `3XX` to the health check requests (carried out every `interval`).
For gRPC servers, Traefik will consider them healthy as long as they return `SERVING` to [gRPC health check v1](https://github.com/grpc/grpc/blob/master/doc/health-checking.md) requests.
To propagate status changes (e.g. all servers of this service are down) upwards, HealthCheck must also be enabled on the parent(s) of this service.
@ -324,6 +325,7 @@ Below are the available options for the health check mechanism:
- `path` (required), defines the server URL path for the health check endpoint .
- `scheme` (optional), replaces the server URL `scheme` for the health check endpoint.
- `mode` (default: http), if defined to `grpc`, will use the gRPC health check protocol to probe the server.
- `hostname` (optional), sets the value of `hostname` in the `Host` header of the health check request.
- `port` (optional), replaces the server URL `port` for the health check endpoint.
- `interval` (default: 30s), defines the frequency of the health check calls.

1
pkg/config/dynamic/fixtures/sample.toml
View file

@ -422,6 +422,7 @@
url = "foobar"
[http.services.Service0.loadBalancer.healthCheck]
scheme = "foobar"
mode = "foobar"
path = "foobar"
port = 42
interval = "foobar"

2
pkg/config/dynamic/http_config.go
View file

@ -213,6 +213,7 @@ func (s *Server) SetDefaults() {
// ServerHealthCheck holds the HealthCheck configuration.
type ServerHealthCheck struct {
Scheme string `json:"scheme,omitempty" toml:"scheme,omitempty" yaml:"scheme,omitempty" export:"true"`
Mode string `json:"mode,omitempty" toml:"mode,omitempty" yaml:"mode,omitempty" export:"true"`
Path string `json:"path,omitempty" toml:"path,omitempty" yaml:"path,omitempty" export:"true"`
Method string `json:"method,omitempty" toml:"method,omitempty" yaml:"method,omitempty" export:"true"`
Port int `json:"port,omitempty" toml:"port,omitempty,omitzero" yaml:"port,omitempty" export:"true"`
@ -229,6 +230,7 @@ type ServerHealthCheck struct {
func (h *ServerHealthCheck) SetDefaults() {
fr := true
h.FollowRedirects = &fr
h.Mode = "http"
}
// +k8s:deepcopy-gen=true

4
pkg/config/label/label_test.go
View file

@ -153,6 +153,7 @@ func TestDecodeConfiguration(t *testing.T) {
"traefik.http.services.Service0.loadbalancer.healthcheck.method": "foobar",
"traefik.http.services.Service0.loadbalancer.healthcheck.port": "42",
"traefik.http.services.Service0.loadbalancer.healthcheck.scheme": "foobar",
"traefik.http.services.Service0.loadbalancer.healthcheck.mode": "foobar",
"traefik.http.services.Service0.loadbalancer.healthcheck.timeout": "foobar",
"traefik.http.services.Service0.loadbalancer.healthcheck.followredirects": "true",
"traefik.http.services.Service0.loadbalancer.passhostheader": "true",
@ -169,6 +170,7 @@ func TestDecodeConfiguration(t *testing.T) {
"traefik.http.services.Service1.loadbalancer.healthcheck.method": "foobar",
"traefik.http.services.Service1.loadbalancer.healthcheck.port": "42",
"traefik.http.services.Service1.loadbalancer.healthcheck.scheme": "foobar",
"traefik.http.services.Service1.loadbalancer.healthcheck.mode": "foobar",
"traefik.http.services.Service1.loadbalancer.healthcheck.timeout": "foobar",
"traefik.http.services.Service1.loadbalancer.healthcheck.followredirects": "true",
"traefik.http.services.Service1.loadbalancer.passhostheader": "true",
@ -650,6 +652,7 @@ func TestDecodeConfiguration(t *testing.T) {
},
HealthCheck: &dynamic.ServerHealthCheck{
Scheme: "foobar",
Mode: "foobar",
Path: "foobar",
Method: "foobar",
Port: 42,
@ -678,6 +681,7 @@ func TestDecodeConfiguration(t *testing.T) {
},
HealthCheck: &dynamic.ServerHealthCheck{
Scheme: "foobar",
Mode: "foobar",
Path: "foobar",
Method: "foobar",
Port: 42,

77
pkg/healthcheck/healthcheck.go
View file

@ -19,6 +19,10 @@ import (
"github.com/traefik/traefik/v2/pkg/metrics"
"github.com/traefik/traefik/v2/pkg/safe"
"github.com/vulcand/oxy/roundrobin"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
healthpb "google.golang.org/grpc/health/grpc_health_v1"
"google.golang.org/grpc/status"
)
const (
@ -26,6 +30,11 @@ const (
serverDown = "DOWN"
)
const (
HTTPMode = "http"
GRPCMode = "grpc"
)
var (
singleton *HealthCheck
once sync.Once
@ -60,6 +69,7 @@ type Options struct {
Headers map[string]string
Hostname string
Scheme string
Mode string
Path string
Method string
Port int
@ -245,9 +255,18 @@ func NewBackendConfig(options Options, backendName string) *BackendConfig {
}
}
// checkHealth returns a nil error in case it was successful and otherwise
// a non-nil error with a meaningful description why the health check failed.
// checkHealth calls the proper health check function depending on the
// backend config mode, defaults to HTTP.
func checkHealth(serverURL *url.URL, backend *BackendConfig) error {
if backend.Options.Mode == GRPCMode {
return checkHealthGRPC(serverURL, backend)
}
return checkHealthHTTP(serverURL, backend)
}
// checkHealthHTTP returns an error with a meaningful description if the health check failed.
// Dedicated to HTTP servers.
func checkHealthHTTP(serverURL *url.URL, backend *BackendConfig) error {
req, err := backend.newRequest(serverURL)
if err != nil {
return fmt.Errorf("failed to create HTTP request: %w", err)
@ -280,6 +299,60 @@ func checkHealth(serverURL *url.URL, backend *BackendConfig) error {
return nil
}
// checkHealthGRPC returns an error with a meaningful description if the health check failed.
// Dedicated to gRPC servers implementing gRPC Health Checking Protocol v1.
func checkHealthGRPC(serverURL *url.URL, backend *BackendConfig) error {
u, err := serverURL.Parse(backend.Path)
if err != nil {
return fmt.Errorf("failed to parse server URL: %w", err)
}
port := u.Port()
if backend.Options.Port != 0 {
port = strconv.Itoa(backend.Options.Port)
}
serverAddr := net.JoinHostPort(u.Hostname(), port)
var opts []grpc.DialOption
switch backend.Options.Scheme {
case "http", "h2c", "":
opts = append(opts, grpc.WithInsecure())
}
ctx, cancel := context.WithTimeout(context.Background(), backend.Options.Timeout)
defer cancel()
conn, err := grpc.DialContext(ctx, serverAddr, opts...)
if err != nil {
if errors.Is(err, context.DeadlineExceeded) {
return fmt.Errorf("fail to connect to %s within %s: %w", serverAddr, backend.Options.Timeout, err)
}
return fmt.Errorf("fail to connect to %s: %w", serverAddr, err)
}
defer func() { _ = conn.Close() }()
resp, err := healthpb.NewHealthClient(conn).Check(ctx, &healthpb.HealthCheckRequest{})
if err != nil {
if stat, ok := status.FromError(err); ok {
switch stat.Code() {
case codes.Unimplemented:
return fmt.Errorf("gRPC server does not implement the health protocol: %w", err)
case codes.DeadlineExceeded:
return fmt.Errorf("gRPC health check timeout: %w", err)
}
}
return fmt.Errorf("gRPC health check failed: %w", err)
}
if resp.Status != healthpb.HealthCheckResponse_SERVING {
return fmt.Errorf("received gRPC status code: %v", resp.Status)
}
return nil
}
// StatusUpdater should be implemented by a service that, when its status
// changes (e.g. all if its children are down), needs to propagate upwards (to
// their parent(s)) that change.

170
pkg/healthcheck/healthcheck_test.go
View file

@ -14,6 +14,7 @@ import (
"github.com/traefik/traefik/v2/pkg/config/runtime"
"github.com/traefik/traefik/v2/pkg/testhelpers"
"github.com/vulcand/oxy/roundrobin"
healthpb "google.golang.org/grpc/health/grpc_health_v1"
)
const (
@ -21,16 +22,12 @@ const (
healthCheckTimeout = 100 * time.Millisecond
)
type testHandler struct {
done func()
healthSequence []int
}
func TestSetBackendsConfiguration(t *testing.T) {
testCases := []struct {
desc string
startHealthy bool
healthSequence []int
mode string
server StartTestServer
expectedNumRemovedServers int
expectedNumUpsertedServers int
expectedGaugeValue float64
@ -38,7 +35,7 @@ func TestSetBackendsConfiguration(t *testing.T) {
{
desc: "healthy server staying healthy",
startHealthy: true,
healthSequence: []int{http.StatusOK},
server: newHTTPServer(http.StatusOK),
expectedNumRemovedServers: 0,
expectedNumUpsertedServers: 0,
expectedGaugeValue: 1,
@ -46,7 +43,7 @@ func TestSetBackendsConfiguration(t *testing.T) {
{
desc: "healthy server staying healthy (StatusNoContent)",
startHealthy: true,
healthSequence: []int{http.StatusNoContent},
server: newHTTPServer(http.StatusNoContent),
expectedNumRemovedServers: 0,
expectedNumUpsertedServers: 0,
expectedGaugeValue: 1,
@ -54,7 +51,7 @@ func TestSetBackendsConfiguration(t *testing.T) {
{
desc: "healthy server staying healthy (StatusPermanentRedirect)",
startHealthy: true,
healthSequence: []int{http.StatusPermanentRedirect},
server: newHTTPServer(http.StatusPermanentRedirect),
expectedNumRemovedServers: 0,
expectedNumUpsertedServers: 0,
expectedGaugeValue: 1,
@ -62,7 +59,7 @@ func TestSetBackendsConfiguration(t *testing.T) {
{
desc: "healthy server becoming sick",
startHealthy: true,
healthSequence: []int{http.StatusServiceUnavailable},
server: newHTTPServer(http.StatusServiceUnavailable),
expectedNumRemovedServers: 1,
expectedNumUpsertedServers: 0,
expectedGaugeValue: 0,
@ -70,7 +67,7 @@ func TestSetBackendsConfiguration(t *testing.T) {
{
desc: "sick server becoming healthy",
startHealthy: false,
healthSequence: []int{http.StatusOK},
server: newHTTPServer(http.StatusOK),
expectedNumRemovedServers: 0,
expectedNumUpsertedServers: 1,
expectedGaugeValue: 1,
@ -78,7 +75,7 @@ func TestSetBackendsConfiguration(t *testing.T) {
{
desc: "sick server staying sick",
startHealthy: false,
healthSequence: []int{http.StatusServiceUnavailable},
server: newHTTPServer(http.StatusServiceUnavailable),
expectedNumRemovedServers: 0,
expectedNumUpsertedServers: 0,
expectedGaugeValue: 0,
@ -86,7 +83,52 @@ func TestSetBackendsConfiguration(t *testing.T) {
{
desc: "healthy server toggling to sick and back to healthy",
startHealthy: true,
healthSequence: []int{http.StatusServiceUnavailable, http.StatusOK},
server: newHTTPServer(http.StatusServiceUnavailable, http.StatusOK),
expectedNumRemovedServers: 1,
expectedNumUpsertedServers: 1,
expectedGaugeValue: 1,
},
{
desc: "healthy grpc server staying healthy",
mode: "grpc",
startHealthy: true,
server: newGRPCServer(healthpb.HealthCheckResponse_SERVING),
expectedNumRemovedServers: 0,
expectedNumUpsertedServers: 0,
expectedGaugeValue: 1,
},
{
desc: "healthy grpc server becoming sick",
mode: "grpc",
startHealthy: true,
server: newGRPCServer(healthpb.HealthCheckResponse_NOT_SERVING),
expectedNumRemovedServers: 1,
expectedNumUpsertedServers: 0,
expectedGaugeValue: 0,
},
{
desc: "sick grpc server becoming healthy",
mode: "grpc",
startHealthy: false,
server: newGRPCServer(healthpb.HealthCheckResponse_SERVING),
expectedNumRemovedServers: 0,
expectedNumUpsertedServers: 1,
expectedGaugeValue: 1,
},
{
desc: "sick grpc server staying sick",
mode: "grpc",
startHealthy: false,
server: newGRPCServer(healthpb.HealthCheckResponse_NOT_SERVING),
expectedNumRemovedServers: 0,
expectedNumUpsertedServers: 0,
expectedGaugeValue: 0,
},
{
desc: "healthy grpc server toggling to sick and back to healthy",
mode: "grpc",
startHealthy: true,
server: newGRPCServer(healthpb.HealthCheckResponse_NOT_SERVING, healthpb.HealthCheckResponse_SERVING),
expectedNumRemovedServers: 1,
expectedNumUpsertedServers: 1,
expectedGaugeValue: 1,
@ -98,22 +140,24 @@ func TestSetBackendsConfiguration(t *testing.T) {
t.Run(test.desc, func(t *testing.T) {
t.Parallel()
// The context is passed to the health check and canonically canceled by
// the test server once all expected requests have been received.
// The context is passed to the health check and
// canonically canceled by the test server once all expected requests have been received.
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
ts := newTestServer(cancel, test.healthSequence)
defer ts.Close()
t.Cleanup(cancel)
serverURL, timeout := test.server.Start(t, cancel)
lb := &testLoadBalancer{RWMutex: &sync.RWMutex{}}
backend := NewBackendConfig(Options{
options := Options{
Mode: test.mode,
Path: "/path",
Interval: healthCheckInterval,
Timeout: healthCheckTimeout,
LB: lb,
}, "backendName")
}
backend := NewBackendConfig(options, "backendName")
serverURL := testhelpers.MustParseURL(ts.URL)
if test.startHealthy {
lb.servers = append(lb.servers, serverURL)
} else {
@ -121,6 +165,7 @@ func TestSetBackendsConfiguration(t *testing.T) {
}
collectingMetrics := &testhelpers.CollectingGauge{}
check := HealthCheck{
Backends: make(map[string]*BackendConfig),
metrics: metricsHealthcheck{serverUpGauge: collectingMetrics},
@ -134,9 +179,6 @@ func TestSetBackendsConfiguration(t *testing.T) {
wg.Done()
}()
// Make test timeout dependent on number of expected requests, health
// check interval, and a safety margin.
timeout := time.Duration(len(test.healthSequence)*int(healthCheckInterval) + 500)
select {
case <-time.After(timeout):
t.Fatal("test did not complete in time")
@ -453,86 +495,6 @@ func TestBalancers_RemoveServer(t *testing.T) {
assert.Equal(t, 0, len(balancer2.Servers()))
}
type testLoadBalancer struct {
// RWMutex needed due to parallel test execution: Both the system-under-test
// and the test assertions reference the counters.
*sync.RWMutex
numRemovedServers int
numUpsertedServers int
servers []*url.URL
// options is just to make sure that LBStatusUpdater forwards options on Upsert to its BalancerHandler
options []roundrobin.ServerOption
}
func (lb *testLoadBalancer) ServeHTTP(w http.ResponseWriter, req *http.Request) {
// noop
}
func (lb *testLoadBalancer) RemoveServer(u *url.URL) error {
lb.Lock()
defer lb.Unlock()
lb.numRemovedServers++
lb.removeServer(u)
return nil
}
func (lb *testLoadBalancer) UpsertServer(u *url.URL, options ...roundrobin.ServerOption) error {
lb.Lock()
defer lb.Unlock()
lb.numUpsertedServers++
lb.servers = append(lb.servers, u)
lb.options = append(lb.options, options...)
return nil
}
func (lb *testLoadBalancer) Servers() []*url.URL {
return lb.servers
}
func (lb *testLoadBalancer) Options() []roundrobin.ServerOption {
return lb.options
}
func (lb *testLoadBalancer) removeServer(u *url.URL) {
var i int
var serverURL *url.URL
found := false
for i, serverURL = range lb.servers {
if *serverURL == *u {
found = true
break
}
}
if !found {
return
}
lb.servers = append(lb.servers[:i], lb.servers[i+1:]...)
}
func newTestServer(done func(), healthSequence []int) *httptest.Server {
handler := &testHandler{
done: done,
healthSequence: healthSequence,
}
return httptest.NewServer(handler)
}
// ServeHTTP returns HTTP response codes following a status sequences.
// It calls the given 'done' function once all request health indicators have been depleted.
func (th *testHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if len(th.healthSequence) == 0 {
panic("received unexpected request")
}
w.WriteHeader(th.healthSequence[0])
th.healthSequence = th.healthSequence[1:]
if len(th.healthSequence) == 0 {
th.done()
}
}
func TestLBStatusUpdater(t *testing.T) {
lb := &testLoadBalancer{RWMutex: &sync.RWMutex{}}
svInfo := &runtime.ServiceInfo{}

205
pkg/healthcheck/mock_test.go Normal file
View file

@ -0,0 +1,205 @@
package healthcheck
import (
"context"
"net"
"net/http"
"net/http/httptest"
"net/url"
"sync"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/traefik/traefik/v2/pkg/testhelpers"
"github.com/vulcand/oxy/roundrobin"
"google.golang.org/grpc"
healthpb "google.golang.org/grpc/health/grpc_health_v1"
)
type StartTestServer interface {
Start(t *testing.T, done func()) (*url.URL, time.Duration)
}
type Status interface {
~int | ~int32
}
type HealthSequence[T Status] struct {
sequenceMu sync.Mutex
sequence []T
}
func (s *HealthSequence[T]) Pop() T {
s.sequenceMu.Lock()
defer s.sequenceMu.Unlock()
stat := s.sequence[0]
s.sequence = s.sequence[1:]
return stat
}
func (s *HealthSequence[T]) IsEmpty() bool {
s.sequenceMu.Lock()
defer s.sequenceMu.Unlock()
return len(s.sequence) == 0
}
type GRPCServer struct {
status HealthSequence[healthpb.HealthCheckResponse_ServingStatus]
done func()
}
func newGRPCServer(healthSequence ...healthpb.HealthCheckResponse_ServingStatus) *GRPCServer {
gRPCService := &GRPCServer{
status: HealthSequence[healthpb.HealthCheckResponse_ServingStatus]{
sequence: healthSequence,
},
}
return gRPCService
}
func (s *GRPCServer) Check(_ context.Context, _ *healthpb.HealthCheckRequest) (*healthpb.HealthCheckResponse, error) {
stat := s.status.Pop()
if s.status.IsEmpty() {
s.done()
}
return &healthpb.HealthCheckResponse{
Status: stat,
}, nil
}
func (s *GRPCServer) Watch(_ *healthpb.HealthCheckRequest, server healthpb.Health_WatchServer) error {
stat := s.status.Pop()
if s.status.IsEmpty() {
s.done()
}
return server.Send(&healthpb.HealthCheckResponse{
Status: stat,
})
}
func (s *GRPCServer) Start(t *testing.T, done func()) (*url.URL, time.Duration) {
t.Helper()
listener, err := net.Listen("tcp4", "127.0.0.1:0")
assert.NoError(t, err)
t.Cleanup(func() { _ = listener.Close() })
server := grpc.NewServer()
t.Cleanup(server.Stop)
s.done = done
healthpb.RegisterHealthServer(server, s)
go func() {
err := server.Serve(listener)
assert.NoError(t, err)
}()
// Make test timeout dependent on number of expected requests, health check interval, and a safety margin.
return testhelpers.MustParseURL("http://" + listener.Addr().String()), time.Duration(len(s.status.sequence)*int(healthCheckInterval) + 500)
}
type HTTPServer struct {
status HealthSequence[int]
done func()
}
func newHTTPServer(healthSequence ...int) *HTTPServer {
handler := &HTTPServer{
status: HealthSequence[int]{
sequence: healthSequence,
},
}
return handler
}
// ServeHTTP returns HTTP response codes following a status sequences.
// It calls the given 'done' function once all request health indicators have been depleted.
func (s *HTTPServer) ServeHTTP(w http.ResponseWriter, _ *http.Request) {
stat := s.status.Pop()
w.WriteHeader(stat)
if s.status.IsEmpty() {
s.done()
}
}
func (s *HTTPServer) Start(t *testing.T, done func()) (*url.URL, time.Duration) {
t.Helper()
s.done = done
ts := httptest.NewServer(s)
t.Cleanup(ts.Close)
// Make test timeout dependent on number of expected requests, health check interval, and a safety margin.
return testhelpers.MustParseURL(ts.URL), time.Duration(len(s.status.sequence)*int(healthCheckInterval) + 500)
}
type testLoadBalancer struct {
// RWMutex needed due to parallel test execution: Both the system-under-test
// and the test assertions reference the counters.
*sync.RWMutex
numRemovedServers int
numUpsertedServers int
servers []*url.URL
// options is just to make sure that LBStatusUpdater forwards options on Upsert to its BalancerHandler
options []roundrobin.ServerOption
}
func (lb *testLoadBalancer) ServeHTTP(w http.ResponseWriter, req *http.Request) {
// noop
}
func (lb *testLoadBalancer) RemoveServer(u *url.URL) error {
lb.Lock()
defer lb.Unlock()
lb.numRemovedServers++
lb.removeServer(u)
return nil
}
func (lb *testLoadBalancer) UpsertServer(u *url.URL, options ...roundrobin.ServerOption) error {
lb.Lock()
defer lb.Unlock()
lb.numUpsertedServers++
lb.servers = append(lb.servers, u)
lb.options = append(lb.options, options...)
return nil
}
func (lb *testLoadBalancer) Servers() []*url.URL {
return lb.servers
}
func (lb *testLoadBalancer) Options() []roundrobin.ServerOption {
return lb.options
}
func (lb *testLoadBalancer) removeServer(u *url.URL) {
var i int
var serverURL *url.URL
found := false
for i, serverURL = range lb.servers {
if *serverURL == *u {
found = true
break
}
}
if !found {
return
}
lb.servers = append(lb.servers[:i], lb.servers[i+1:]...)
}

2
pkg/provider/kv/kv_test.go
View file

@ -48,6 +48,7 @@ func Test_buildConfiguration(t *testing.T) {
"traefik/http/services/Service01/loadBalancer/healthCheck/headers/name0": "foobar",
"traefik/http/services/Service01/loadBalancer/healthCheck/headers/name1": "foobar",
"traefik/http/services/Service01/loadBalancer/healthCheck/scheme": "foobar",
"traefik/http/services/Service01/loadBalancer/healthCheck/mode": "foobar",
"traefik/http/services/Service01/loadBalancer/healthCheck/followredirects": "true",
"traefik/http/services/Service01/loadBalancer/responseForwarding/flushInterval": "foobar",
"traefik/http/services/Service01/loadBalancer/passHostHeader": "true",
@ -642,6 +643,7 @@ func Test_buildConfiguration(t *testing.T) {
},
HealthCheck: &dynamic.ServerHealthCheck{
Scheme: "foobar",
Mode: "foobar",
Path: "foobar",
Port: 42,
Interval: "foobar",

11
pkg/server/service/service.go
View file

@ -360,8 +360,19 @@ func buildHealthCheckOptions(ctx context.Context, lb healthcheck.Balancer, backe
followRedirects = *hc.FollowRedirects
}
mode := healthcheck.HTTPMode
switch hc.Mode {
case "":
mode = healthcheck.HTTPMode
case healthcheck.GRPCMode, healthcheck.HTTPMode:
mode = hc.Mode
default:
logger.Errorf("Illegal health check mode for backend '%s'", backend)
}
return &healthcheck.Options{
Scheme: hc.Scheme,
Mode: mode,
Path: hc.Path,
Method: hc.Method,
Port: hc.Port,