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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| /* | ||
| Copyright 2014 Google Inc. All rights reserved. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package kubelet | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net/http" | ||
| "strconv" | ||
|
|
||
| "github.com/GoogleCloudPlatform/kubernetes/pkg/api" | ||
| "github.com/golang/glog" | ||
| ) | ||
|
|
||
| type HealthChecker interface { | ||
| IsHealthy(container api.Container) (bool, error) | ||
| } | ||
|
|
||
| type httpDoInterface interface { | ||
| Get(string) (*http.Response, error) | ||
| } | ||
|
|
||
| func MakeHealthChecker() HealthChecker { | ||
| return &MuxHealthChecker{ | ||
| checkers: map[string]HealthChecker{ | ||
| "http": &HTTPHealthChecker{ | ||
| client: &http.Client{}, | ||
| }, | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| type MuxHealthChecker struct { | ||
| checkers map[string]HealthChecker | ||
| } | ||
|
|
||
| func (m *MuxHealthChecker) IsHealthy(container api.Container) (bool, error) { | ||
| checker, ok := m.checkers[container.LivenessProbe.Type] | ||
| if !ok || checker == nil { | ||
| glog.Warningf("Failed to find health checker for %s %s", container.Name, container.LivenessProbe.Type) | ||
| return true, nil | ||
| } | ||
| return checker.IsHealthy(container) | ||
| } | ||
|
|
||
| type HTTPHealthChecker struct { | ||
| client httpDoInterface | ||
| } | ||
|
|
||
| func (h *HTTPHealthChecker) findPort(container api.Container, portName string) int64 { | ||
| for _, port := range container.Ports { | ||
| if port.Name == portName { | ||
| // TODO This means you can only health check exposed ports | ||
| return int64(port.HostPort) | ||
| } | ||
| } | ||
| return -1 | ||
| } | ||
|
|
||
| func (h *HTTPHealthChecker) IsHealthy(container api.Container) (bool, error) { | ||
| params := container.LivenessProbe.HTTPGet | ||
| port := h.findPort(container, params.Port) | ||
| if port == -1 { | ||
| var err error | ||
| port, err = strconv.ParseInt(params.Port, 10, 0) | ||
| if err != nil { | ||
| return true, err | ||
| } | ||
| } | ||
| var host string | ||
| if len(params.Host) > 0 { | ||
| host = params.Host | ||
| } else { | ||
| host = "localhost" | ||
| } | ||
| url := fmt.Sprintf("http://%s:%d%s", host, port, params.Path) | ||
| res, err := h.client.Get(url) | ||
| if res != nil && res.Body != nil { | ||
| defer res.Body.Close() | ||
| } | ||
| if err != nil { | ||
| // At this point, if it fails, its either a policy (unlikely) or HTTP protocol (likely) error. | ||
| return false, nil | ||
| } | ||
| return res.StatusCode == http.StatusOK, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| /* | ||
| Copyright 2014 Google Inc. All rights reserved. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package kubelet | ||
|
|
||
| import ( | ||
| "net/http" | ||
| "testing" | ||
|
|
||
| "github.com/GoogleCloudPlatform/kubernetes/pkg/api" | ||
| ) | ||
|
|
||
| type fakeHttpClient struct { | ||
| req string | ||
| res http.Response | ||
| err error | ||
| } | ||
|
|
||
| func (f *fakeHttpClient) Get(url string) (*http.Response, error) { | ||
| f.req = url | ||
| return &f.res, f.err | ||
| } | ||
|
|
||
| func TestHttpHealth(t *testing.T) { | ||
| fakeClient := fakeHttpClient{ | ||
| res: http.Response{ | ||
| StatusCode: http.StatusOK, | ||
| }, | ||
| } | ||
|
|
||
| check := HTTPHealthChecker{ | ||
| client: &fakeClient, | ||
| } | ||
|
|
||
| container := api.Container{ | ||
| LivenessProbe: api.LivenessProbe{ | ||
| HTTPGet: api.HTTPGetProbe{ | ||
| Port: "8080", | ||
| Path: "/foo/bar", | ||
| }, | ||
| Type: "http", | ||
| }, | ||
| } | ||
|
|
||
| ok, err := check.IsHealthy(container) | ||
| if !ok { | ||
| t.Error("Unexpected unhealthy") | ||
| } | ||
| if err != nil { | ||
| t.Errorf("Unexpected error: %#v", err) | ||
| } | ||
| if fakeClient.req != "http://localhost:8080/foo/bar" { | ||
| t.Errorf("Unexpected url: %s", fakeClient.req) | ||
| } | ||
| } | ||
|
|
||
| func TestFindPort(t *testing.T) { | ||
| container := api.Container{ | ||
| Ports: []api.Port{ | ||
| { | ||
| Name: "foo", | ||
| HostPort: 8080, | ||
| }, | ||
| { | ||
| Name: "bar", | ||
| HostPort: 9000, | ||
| }, | ||
| }, | ||
| } | ||
| check := HTTPHealthChecker{} | ||
| validatePort(t, check.findPort(container, "foo"), 8080) | ||
| } | ||
|
|
||
| func validatePort(t *testing.T, port int64, expectedPort int64) { | ||
| if port != expectedPort { | ||
| t.Errorf("Unexpected port: %d, expected: %d", port, expectedPort) | ||
| } | ||
| } |
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