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Merge pull request #12917 from chaochn47/2021-05-03-backport-#12880
Backport-3.4 exclude alarms from health check conditionally
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,151 @@ | ||
| // Copyright 2021 The etcd Authors | ||
| // | ||
| // 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 etcdhttp | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
| "io" | ||
| "io/ioutil" | ||
| "net/http" | ||
| "net/http/httptest" | ||
| "testing" | ||
|
|
||
| "go.etcd.io/etcd/etcdserver" | ||
| stats "go.etcd.io/etcd/etcdserver/api/v2stats" | ||
| pb "go.etcd.io/etcd/etcdserver/etcdserverpb" | ||
| "go.etcd.io/etcd/pkg/testutil" | ||
| "go.etcd.io/etcd/pkg/types" | ||
| "go.etcd.io/etcd/raft" | ||
| ) | ||
|
|
||
| type fakeStats struct{} | ||
|
|
||
| func (s *fakeStats) SelfStats() []byte { return nil } | ||
| func (s *fakeStats) LeaderStats() []byte { return nil } | ||
| func (s *fakeStats) StoreStats() []byte { return nil } | ||
|
|
||
| type fakeServerV2 struct { | ||
| fakeServer | ||
| stats.Stats | ||
| health string | ||
| } | ||
|
|
||
| func (s *fakeServerV2) Leader() types.ID { | ||
| if s.health == "true" { | ||
| return 1 | ||
| } | ||
| return types.ID(raft.None) | ||
| } | ||
| func (s *fakeServerV2) Do(ctx context.Context, r pb.Request) (etcdserver.Response, error) { | ||
| if s.health == "true" { | ||
| return etcdserver.Response{}, nil | ||
| } | ||
| return etcdserver.Response{}, fmt.Errorf("fail health check") | ||
| } | ||
| func (s *fakeServerV2) ClientCertAuthEnabled() bool { return false } | ||
|
|
||
| func TestHealthHandler(t *testing.T) { | ||
| // define the input and expected output | ||
| // input: alarms, and healthCheckURL | ||
| tests := []struct { | ||
| alarms []*pb.AlarmMember | ||
| healthCheckURL string | ||
| statusCode int | ||
| health string | ||
| }{ | ||
| { | ||
| []*pb.AlarmMember{}, | ||
| "/health", | ||
| http.StatusOK, | ||
| "true", | ||
| }, | ||
| { | ||
| []*pb.AlarmMember{{MemberID: uint64(0), Alarm: pb.AlarmType_NOSPACE}}, | ||
| "/health", | ||
| http.StatusServiceUnavailable, | ||
| "false", | ||
| }, | ||
| { | ||
| []*pb.AlarmMember{{MemberID: uint64(0), Alarm: pb.AlarmType_NOSPACE}}, | ||
| "/health?exclude=NOSPACE", | ||
| http.StatusOK, | ||
| "true", | ||
| }, | ||
| { | ||
| []*pb.AlarmMember{}, | ||
| "/health?exclude=NOSPACE", | ||
| http.StatusOK, | ||
| "true", | ||
| }, | ||
| { | ||
| []*pb.AlarmMember{{MemberID: uint64(0), Alarm: pb.AlarmType_NOSPACE}, {MemberID: uint64(1), Alarm: pb.AlarmType_CORRUPT}}, | ||
| "/health?exclude=NOSPACE", | ||
| http.StatusServiceUnavailable, | ||
| "false", | ||
| }, | ||
| { | ||
| []*pb.AlarmMember{{MemberID: uint64(0), Alarm: pb.AlarmType_NOSPACE}, {MemberID: uint64(1), Alarm: pb.AlarmType_CORRUPT}}, | ||
| "/health?exclude=NOSPACE&exclude=CORRUPT", | ||
| http.StatusOK, | ||
| "true", | ||
| }, | ||
| } | ||
|
|
||
| for i, tt := range tests { | ||
| func() { | ||
| mux := http.NewServeMux() | ||
| HandleMetricsHealth(mux, &fakeServerV2{ | ||
| fakeServer: fakeServer{alarms: tt.alarms}, | ||
| Stats: &fakeStats{}, | ||
| health: tt.health, | ||
| }) | ||
| ts := httptest.NewServer(mux) | ||
| defer ts.Close() | ||
|
|
||
| res, err := ts.Client().Do(&http.Request{Method: http.MethodGet, URL: testutil.MustNewURL(t, ts.URL+tt.healthCheckURL)}) | ||
| if err != nil { | ||
| t.Errorf("fail serve http request %s %v in test case #%d", tt.healthCheckURL, err, i+1) | ||
| } | ||
| if res == nil { | ||
| t.Errorf("got nil http response with http request %s in test case #%d", tt.healthCheckURL, i+1) | ||
| return | ||
| } | ||
| if res.StatusCode != tt.statusCode { | ||
| t.Errorf("want statusCode %d but got %d in test case #%d", tt.statusCode, res.StatusCode, i+1) | ||
| } | ||
| health, err := parseHealthOutput(res.Body) | ||
| if err != nil { | ||
| t.Errorf("fail parse health check output %v", err) | ||
| } | ||
| if health.Health != tt.health { | ||
| t.Errorf("want health %s but got %s", tt.health, health.Health) | ||
| } | ||
| }() | ||
| } | ||
| } | ||
|
|
||
| func parseHealthOutput(body io.Reader) (Health, error) { | ||
| obj := Health{} | ||
| d, derr := ioutil.ReadAll(body) | ||
| if derr != nil { | ||
| return obj, derr | ||
| } | ||
| if err := json.Unmarshal(d, &obj); err != nil { | ||
| return obj, err | ||
| } | ||
| return obj, nil | ||
| } |
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