package checks import ( "bytes" "fmt" "io/ioutil" "log" "net" "net/http" "net/http/httptest" "os" "reflect" "regexp" "strings" "testing" "time" "github.com/hashicorp/consul/agent/mock" "github.com/hashicorp/consul/api" "github.com/hashicorp/consul/sdk/testutil/retry" "github.com/hashicorp/consul/types" uuid "github.com/hashicorp/go-uuid" ) func uniqueID() string { id, err := uuid.GenerateUUID() if err != nil { panic(err) } return id } func TestCheckMonitor_Script(t *testing.T) { tests := []struct { script, status string }{ {"exit 0", "passing"}, {"exit 1", "warning"}, {"exit 2", "critical"}, {"foobarbaz", "critical"}, } for _, tt := range tests { t.Run(tt.status, func(t *testing.T) { notif := mock.NewNotify() check := &CheckMonitor{ Notify: notif, CheckID: types.CheckID("foo"), Script: tt.script, Interval: 25 * time.Millisecond, Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags), } check.Start() defer check.Stop() retry.Run(t, func(r *retry.R) { if got, want := notif.Updates("foo"), 2; got < want { r.Fatalf("got %d updates want at least %d", got, want) } if got, want := notif.State("foo"), tt.status; got != want { r.Fatalf("got state %q want %q", got, want) } }) }) } } func TestCheckMonitor_Args(t *testing.T) { tests := []struct { args []string status string }{ {[]string{"sh", "-c", "exit 0"}, "passing"}, {[]string{"sh", "-c", "exit 1"}, "warning"}, {[]string{"sh", "-c", "exit 2"}, "critical"}, {[]string{"foobarbaz"}, "critical"}, } for _, tt := range tests { t.Run(tt.status, func(t *testing.T) { notif := mock.NewNotify() check := &CheckMonitor{ Notify: notif, CheckID: types.CheckID("foo"), ScriptArgs: tt.args, Interval: 25 * time.Millisecond, Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags), } check.Start() defer check.Stop() retry.Run(t, func(r *retry.R) { if got, want := notif.Updates("foo"), 2; got < want { r.Fatalf("got %d updates want at least %d", got, want) } if got, want := notif.State("foo"), tt.status; got != want { r.Fatalf("got state %q want %q", got, want) } }) }) } } func TestCheckMonitor_Timeout(t *testing.T) { // t.Parallel() // timing test. no parallel notif := mock.NewNotify() check := &CheckMonitor{ Notify: notif, CheckID: types.CheckID("foo"), ScriptArgs: []string{"sh", "-c", "sleep 1 && exit 0"}, Interval: 50 * time.Millisecond, Timeout: 25 * time.Millisecond, Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags), } check.Start() defer check.Stop() time.Sleep(250 * time.Millisecond) // Should have at least 2 updates if notif.Updates("foo") < 2 { t.Fatalf("should have at least 2 updates %v", notif.UpdatesMap()) } if notif.State("foo") != "critical" { t.Fatalf("should be critical %v", notif.StateMap()) } } func TestCheckMonitor_RandomStagger(t *testing.T) { // t.Parallel() // timing test. no parallel notif := mock.NewNotify() check := &CheckMonitor{ Notify: notif, CheckID: types.CheckID("foo"), ScriptArgs: []string{"sh", "-c", "exit 0"}, Interval: 25 * time.Millisecond, Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags), } check.Start() defer check.Stop() time.Sleep(500 * time.Millisecond) // Should have at least 1 update if notif.Updates("foo") < 1 { t.Fatalf("should have 1 or more updates %v", notif.UpdatesMap()) } if notif.State("foo") != api.HealthPassing { t.Fatalf("should be %v %v", api.HealthPassing, notif.StateMap()) } } func TestCheckMonitor_LimitOutput(t *testing.T) { t.Parallel() notif := mock.NewNotify() check := &CheckMonitor{ Notify: notif, CheckID: types.CheckID("foo"), ScriptArgs: []string{"od", "-N", "81920", "/dev/urandom"}, Interval: 25 * time.Millisecond, Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags), } check.Start() defer check.Stop() time.Sleep(50 * time.Millisecond) // Allow for extra bytes for the truncation message if len(notif.Output("foo")) > BufSize+100 { t.Fatalf("output size is too long") } } func TestCheckTTL(t *testing.T) { // t.Parallel() // timing test. no parallel notif := mock.NewNotify() check := &CheckTTL{ Notify: notif, CheckID: types.CheckID("foo"), TTL: 200 * time.Millisecond, Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags), } check.Start() defer check.Stop() time.Sleep(100 * time.Millisecond) check.SetStatus(api.HealthPassing, "test-output") if notif.Updates("foo") != 1 { t.Fatalf("should have 1 updates %v", notif.UpdatesMap()) } if notif.State("foo") != api.HealthPassing { t.Fatalf("should be passing %v", notif.StateMap()) } // Ensure we don't fail early time.Sleep(150 * time.Millisecond) if notif.Updates("foo") != 1 { t.Fatalf("should have 1 updates %v", notif.UpdatesMap()) } // Wait for the TTL to expire time.Sleep(150 * time.Millisecond) if notif.Updates("foo") != 2 { t.Fatalf("should have 2 updates %v", notif.UpdatesMap()) } if notif.State("foo") != api.HealthCritical { t.Fatalf("should be critical %v", notif.StateMap()) } if !strings.Contains(notif.Output("foo"), "test-output") { t.Fatalf("should have retained output %v", notif.OutputMap()) } } func TestCheckHTTP(t *testing.T) { t.Parallel() tests := []struct { desc string code int method string header http.Header status string }{ // passing {code: 200, status: api.HealthPassing}, {code: 201, status: api.HealthPassing}, {code: 250, status: api.HealthPassing}, {code: 299, status: api.HealthPassing}, // warning {code: 429, status: api.HealthWarning}, // critical {code: 150, status: api.HealthCritical}, {code: 199, status: api.HealthCritical}, {code: 300, status: api.HealthCritical}, {code: 400, status: api.HealthCritical}, {code: 500, status: api.HealthCritical}, // custom method {desc: "custom method GET", code: 200, method: "GET", status: api.HealthPassing}, {desc: "custom method POST", code: 200, header: http.Header{"Content-Length": []string{"0"}}, method: "POST", status: api.HealthPassing}, {desc: "custom method abc", code: 200, method: "abc", status: api.HealthPassing}, // custom header {desc: "custom header", code: 200, header: http.Header{"A": []string{"b", "c"}}, status: api.HealthPassing}, {desc: "host header", code: 200, header: http.Header{"Host": []string{"a"}}, status: api.HealthPassing}, } for _, tt := range tests { desc := tt.desc if desc == "" { desc = fmt.Sprintf("code %d -> status %s", tt.code, tt.status) } t.Run(desc, func(t *testing.T) { server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { if tt.method != "" && tt.method != r.Method { w.WriteHeader(999) return } expectedHeader := http.Header{ "Accept": []string{"text/plain, text/*, */*"}, "Accept-Encoding": []string{"gzip"}, "Connection": []string{"close"}, "User-Agent": []string{"Consul Health Check"}, } for k, v := range tt.header { expectedHeader[k] = v } // the Host header is in r.Host and not in the headers host := expectedHeader.Get("Host") if host != "" && host != r.Host { w.WriteHeader(999) return } expectedHeader.Del("Host") if !reflect.DeepEqual(expectedHeader, r.Header) { w.WriteHeader(999) return } // Body larger than 4k limit body := bytes.Repeat([]byte{'a'}, 2*BufSize) w.WriteHeader(tt.code) w.Write(body) })) defer server.Close() notif := mock.NewNotify() check := &CheckHTTP{ Notify: notif, CheckID: types.CheckID("foo"), HTTP: server.URL, Method: tt.method, Header: tt.header, Interval: 10 * time.Millisecond, Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags), } check.Start() defer check.Stop() retry.Run(t, func(r *retry.R) { if got, want := notif.Updates("foo"), 2; got < want { r.Fatalf("got %d updates want at least %d", got, want) } if got, want := notif.State("foo"), tt.status; got != want { r.Fatalf("got state %q want %q", got, want) } // Allow slightly more data than BufSize, for the header if n := len(notif.Output("foo")); n > (BufSize + 256) { r.Fatalf("output too long: %d (%d-byte limit)", n, BufSize) } }) }) } } func TestCheckHTTPTimeout(t *testing.T) { t.Parallel() timeout := 5 * time.Millisecond server := httptest.NewServer(http.HandlerFunc(func(http.ResponseWriter, *http.Request) { time.Sleep(2 * timeout) })) defer server.Close() notif := mock.NewNotify() check := &CheckHTTP{ Notify: notif, CheckID: types.CheckID("bar"), HTTP: server.URL, Timeout: timeout, Interval: 10 * time.Millisecond, Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags), } check.Start() defer check.Stop() retry.Run(t, func(r *retry.R) { if got, want := notif.Updates("bar"), 2; got < want { r.Fatalf("got %d updates want at least %d", got, want) } if got, want := notif.State("bar"), api.HealthCritical; got != want { r.Fatalf("got state %q want %q", got, want) } }) } func TestCheckHTTP_disablesKeepAlives(t *testing.T) { t.Parallel() check := &CheckHTTP{ CheckID: types.CheckID("foo"), HTTP: "http://foo.bar/baz", Interval: 10 * time.Second, Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags), } check.Start() defer check.Stop() if !check.httpClient.Transport.(*http.Transport).DisableKeepAlives { t.Fatalf("should have disabled keepalives") } } func largeBodyHandler(code int) http.Handler { return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { // Body larger than 4k limit body := bytes.Repeat([]byte{'a'}, 2*BufSize) w.WriteHeader(code) w.Write(body) }) } func TestCheckHTTP_TLS_SkipVerify(t *testing.T) { t.Parallel() server := httptest.NewTLSServer(largeBodyHandler(200)) defer server.Close() tlsConfig := &api.TLSConfig{ InsecureSkipVerify: true, } tlsClientConfig, err := api.SetupTLSConfig(tlsConfig) if err != nil { t.Fatalf("err: %v", err) } notif := mock.NewNotify() check := &CheckHTTP{ Notify: notif, CheckID: types.CheckID("skipverify_true"), HTTP: server.URL, Interval: 25 * time.Millisecond, Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags), TLSClientConfig: tlsClientConfig, } check.Start() defer check.Stop() if !check.httpClient.Transport.(*http.Transport).TLSClientConfig.InsecureSkipVerify { t.Fatalf("should be true") } retry.Run(t, func(r *retry.R) { if got, want := notif.State("skipverify_true"), api.HealthPassing; got != want { r.Fatalf("got state %q want %q", got, want) } }) } func TestCheckHTTP_TLS_BadVerify(t *testing.T) { t.Parallel() server := httptest.NewTLSServer(largeBodyHandler(200)) defer server.Close() tlsClientConfig, err := api.SetupTLSConfig(&api.TLSConfig{}) if err != nil { t.Fatalf("err: %v", err) } notif := mock.NewNotify() check := &CheckHTTP{ Notify: notif, CheckID: types.CheckID("skipverify_false"), HTTP: server.URL, Interval: 100 * time.Millisecond, Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags), TLSClientConfig: tlsClientConfig, } check.Start() defer check.Stop() if check.httpClient.Transport.(*http.Transport).TLSClientConfig.InsecureSkipVerify { t.Fatalf("should default to false") } retry.Run(t, func(r *retry.R) { // This should fail due to an invalid SSL cert if got, want := notif.State("skipverify_false"), api.HealthCritical; got != want { r.Fatalf("got state %q want %q", got, want) } if !strings.Contains(notif.Output("skipverify_false"), "certificate signed by unknown authority") { r.Fatalf("should fail with certificate error %v", notif.OutputMap()) } }) } func mockTCPServer(network string) net.Listener { var ( addr string ) if network == `tcp6` { addr = `[::1]:0` } else { addr = `127.0.0.1:0` } listener, err := net.Listen(network, addr) if err != nil { panic(err) } return listener } func expectTCPStatus(t *testing.T, tcp string, status string) { notif := mock.NewNotify() check := &CheckTCP{ Notify: notif, CheckID: types.CheckID("foo"), TCP: tcp, Interval: 10 * time.Millisecond, Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags), } check.Start() defer check.Stop() retry.Run(t, func(r *retry.R) { if got, want := notif.Updates("foo"), 2; got < want { r.Fatalf("got %d updates want at least %d", got, want) } if got, want := notif.State("foo"), status; got != want { r.Fatalf("got state %q want %q", got, want) } }) } func TestCheckTCPCritical(t *testing.T) { t.Parallel() var ( tcpServer net.Listener ) tcpServer = mockTCPServer(`tcp`) expectTCPStatus(t, `127.0.0.1:0`, api.HealthCritical) tcpServer.Close() } func TestCheckTCPPassing(t *testing.T) { t.Parallel() var ( tcpServer net.Listener ) tcpServer = mockTCPServer(`tcp`) expectTCPStatus(t, tcpServer.Addr().String(), api.HealthPassing) tcpServer.Close() if os.Getenv("TRAVIS") == "true" { t.Skip("IPV6 not supported on travis-ci") } if os.Getenv("CIRCLECI") == "true" { t.Skip("IPV6 not supported on CircleCI") } tcpServer = mockTCPServer(`tcp6`) expectTCPStatus(t, tcpServer.Addr().String(), api.HealthPassing) tcpServer.Close() } func TestCheck_Docker(t *testing.T) { tests := []struct { desc string handlers map[string]http.HandlerFunc out *regexp.Regexp state string }{ { desc: "create exec: bad container id", handlers: map[string]http.HandlerFunc{ "POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(404) }, }, out: regexp.MustCompile("^create exec failed for unknown container 123$"), state: api.HealthCritical, }, { desc: "create exec: paused container", handlers: map[string]http.HandlerFunc{ "POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(409) }, }, out: regexp.MustCompile("^create exec failed since container 123 is paused or stopped$"), state: api.HealthCritical, }, { desc: "create exec: bad status code", handlers: map[string]http.HandlerFunc{ "POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(999) fmt.Fprint(w, "some output") }, }, out: regexp.MustCompile("^create exec failed for container 123 with status 999: some output$"), state: api.HealthCritical, }, { desc: "create exec: bad json", handlers: map[string]http.HandlerFunc{ "POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(201) w.Header().Set("Content-Type", "application/json") fmt.Fprint(w, `this is not json`) }, }, out: regexp.MustCompile("^create exec response for container 123 cannot be parsed: .*$"), state: api.HealthCritical, }, { desc: "start exec: bad exec id", handlers: map[string]http.HandlerFunc{ "POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(201) w.Header().Set("Content-Type", "application/json") fmt.Fprint(w, `{"Id":"456"}`) }, "POST /exec/456/start": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(404) }, }, out: regexp.MustCompile("^start exec failed for container 123: invalid exec id 456$"), state: api.HealthCritical, }, { desc: "start exec: paused container", handlers: map[string]http.HandlerFunc{ "POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(201) w.Header().Set("Content-Type", "application/json") fmt.Fprint(w, `{"Id":"456"}`) }, "POST /exec/456/start": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(409) }, }, out: regexp.MustCompile("^start exec failed since container 123 is paused or stopped$"), state: api.HealthCritical, }, { desc: "start exec: bad status code", handlers: map[string]http.HandlerFunc{ "POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(201) w.Header().Set("Content-Type", "application/json") fmt.Fprint(w, `{"Id":"456"}`) }, "POST /exec/456/start": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(999) fmt.Fprint(w, "some output") }, }, out: regexp.MustCompile("^start exec failed for container 123 with status 999: body: some output err: $"), state: api.HealthCritical, }, { desc: "inspect exec: bad exec id", handlers: map[string]http.HandlerFunc{ "POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(201) w.Header().Set("Content-Type", "application/json") fmt.Fprint(w, `{"Id":"456"}`) }, "POST /exec/456/start": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(200) fmt.Fprint(w, "OK") }, "GET /exec/456/json": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(404) }, }, out: regexp.MustCompile("^inspect exec failed for container 123: invalid exec id 456$"), state: api.HealthCritical, }, { desc: "inspect exec: bad status code", handlers: map[string]http.HandlerFunc{ "POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(201) w.Header().Set("Content-Type", "application/json") fmt.Fprint(w, `{"Id":"456"}`) }, "POST /exec/456/start": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(200) fmt.Fprint(w, "OK") }, "GET /exec/456/json": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(999) fmt.Fprint(w, "some output") }, }, out: regexp.MustCompile("^inspect exec failed for container 123 with status 999: some output$"), state: api.HealthCritical, }, { desc: "inspect exec: bad json", handlers: map[string]http.HandlerFunc{ "POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(201) w.Header().Set("Content-Type", "application/json") fmt.Fprint(w, `{"Id":"456"}`) }, "POST /exec/456/start": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(200) fmt.Fprint(w, "OK") }, "GET /exec/456/json": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(200) w.Header().Set("Content-Type", "application/json") fmt.Fprint(w, `this is not json`) }, }, out: regexp.MustCompile("^inspect exec response for container 123 cannot be parsed: .*$"), state: api.HealthCritical, }, { desc: "inspect exec: exit code 0: passing", handlers: map[string]http.HandlerFunc{ "POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(201) w.Header().Set("Content-Type", "application/json") fmt.Fprint(w, `{"Id":"456"}`) }, "POST /exec/456/start": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(200) fmt.Fprint(w, "OK") }, "GET /exec/456/json": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(200) w.Header().Set("Content-Type", "application/json") fmt.Fprint(w, `{"ExitCode":0}`) }, }, out: regexp.MustCompile("^OK$"), state: api.HealthPassing, }, { desc: "inspect exec: exit code 0: passing: truncated", handlers: map[string]http.HandlerFunc{ "POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(201) w.Header().Set("Content-Type", "application/json") fmt.Fprint(w, `{"Id":"456"}`) }, "POST /exec/456/start": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(200) fmt.Fprint(w, "01234567890123456789OK") // more than 20 bytes }, "GET /exec/456/json": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(200) w.Header().Set("Content-Type", "application/json") fmt.Fprint(w, `{"ExitCode":0}`) }, }, out: regexp.MustCompile("^Captured 20 of 22 bytes\n...\n234567890123456789OK$"), state: api.HealthPassing, }, { desc: "inspect exec: exit code 1: warning", handlers: map[string]http.HandlerFunc{ "POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(201) w.Header().Set("Content-Type", "application/json") fmt.Fprint(w, `{"Id":"456"}`) }, "POST /exec/456/start": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(200) fmt.Fprint(w, "WARN") }, "GET /exec/456/json": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(200) w.Header().Set("Content-Type", "application/json") fmt.Fprint(w, `{"ExitCode":1}`) }, }, out: regexp.MustCompile("^WARN$"), state: api.HealthWarning, }, { desc: "inspect exec: exit code 2: critical", handlers: map[string]http.HandlerFunc{ "POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(201) w.Header().Set("Content-Type", "application/json") fmt.Fprint(w, `{"Id":"456"}`) }, "POST /exec/456/start": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(200) fmt.Fprint(w, "NOK") }, "GET /exec/456/json": func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(200) w.Header().Set("Content-Type", "application/json") fmt.Fprint(w, `{"ExitCode":2}`) }, }, out: regexp.MustCompile("^NOK$"), state: api.HealthCritical, }, } for _, tt := range tests { t.Run(tt.desc, func(t *testing.T) { srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { x := r.Method + " " + r.RequestURI h := tt.handlers[x] if h == nil { t.Fatalf("bad url %s", x) } h(w, r) })) defer srv.Close() // create a docker client with a tiny output buffer // to test the truncation c, err := NewDockerClient(srv.URL, 20) if err != nil { t.Fatal(err) } notif, upd := mock.NewNotifyChan() id := types.CheckID("chk") check := &CheckDocker{ Notify: notif, CheckID: id, ScriptArgs: []string{"/health.sh"}, DockerContainerID: "123", Interval: 25 * time.Millisecond, Client: c, } check.Start() defer check.Stop() <-upd // wait for update if got, want := notif.Output(id), tt.out; !want.MatchString(got) { t.Fatalf("got %q want %q", got, want) } if got, want := notif.State(id), tt.state; got != want { t.Fatalf("got status %q want %q", got, want) } }) } }