|
| 1 | +package metrics |
| 2 | + |
| 3 | +import ( |
| 4 | + "fmt" |
| 5 | + "net/http" |
| 6 | + "strings" |
| 7 | +) |
| 8 | + |
| 9 | +type mockPrometheusServer struct { |
| 10 | + nodesForCluster map[string]int |
| 11 | + labelSkip map[string]struct{} |
| 12 | + validTokens []string |
| 13 | +} |
| 14 | + |
| 15 | +func newMockPrometheusServer() mockPrometheusServer { |
| 16 | + return mockPrometheusServer{ |
| 17 | + nodesForCluster: map[string]int{}, |
| 18 | + labelSkip: map[string]struct{}{}, |
| 19 | + validTokens: []string{}, |
| 20 | + } |
| 21 | +} |
| 22 | + |
| 23 | +func (m *mockPrometheusServer) SetNodesForCluster(nodes int, cluster string, skipLabel bool) { |
| 24 | + m.nodesForCluster[cluster] = nodes |
| 25 | + if skipLabel { |
| 26 | + m.labelSkip[cluster] = struct{}{} |
| 27 | + } |
| 28 | +} |
| 29 | + |
| 30 | +func (m *mockPrometheusServer) Clear() { |
| 31 | + m.nodesForCluster = map[string]int{} |
| 32 | + m.validTokens = []string{} |
| 33 | + m.labelSkip = map[string]struct{}{} |
| 34 | +} |
| 35 | + |
| 36 | +func (m *mockPrometheusServer) AddAuthToken(token string) { |
| 37 | + m.validTokens = append(m.validTokens, token) |
| 38 | +} |
| 39 | +func (m *mockPrometheusServer) ServeHTTP(w http.ResponseWriter, r *http.Request) { |
| 40 | + // main serve method for the test http server |
| 41 | + if strings.HasSuffix(r.URL.String(), "/metrics") { |
| 42 | + //do auth and return the node metrics text |
| 43 | + if !m.requestAuthenticated(r) { |
| 44 | + w.WriteHeader(http.StatusUnauthorized) |
| 45 | + return |
| 46 | + } |
| 47 | + if !m.requestAuthorized(r) { |
| 48 | + w.WriteHeader(http.StatusForbidden) |
| 49 | + return |
| 50 | + } |
| 51 | + requestText := m.getNodeMetricsText() |
| 52 | + w.WriteHeader(http.StatusOK) |
| 53 | + w.Write([]byte(requestText)) |
| 54 | + return |
| 55 | + } |
| 56 | + w.WriteHeader(http.StatusNotFound) |
| 57 | + return |
| 58 | +} |
| 59 | + |
| 60 | +func (m *mockPrometheusServer) getNodeMetricsText() string { |
| 61 | + retText := "# TYPE cluster_manager_nodes gauge\n" |
| 62 | + for cluster, nodeCount := range m.nodesForCluster { |
| 63 | + if _, ok := m.labelSkip[cluster]; ok { |
| 64 | + retText += fmt.Sprintf("%s{} %d\n", nodeGaugeMetricName, nodeCount) |
| 65 | + } else { |
| 66 | + retText += fmt.Sprintf("%s{%s=\"%s\"} %d\n", nodeGaugeMetricName, clusterNameLabel, cluster, nodeCount) |
| 67 | + } |
| 68 | + } |
| 69 | + return retText |
| 70 | +} |
| 71 | + |
| 72 | +func (m *mockPrometheusServer) requestAuthorized(req *http.Request) bool { |
| 73 | + header := req.Header.Get("Authorization") |
| 74 | + splitHeader := strings.Split(header, " ") |
| 75 | + if len(splitHeader) < 2 { |
| 76 | + return false |
| 77 | + } |
| 78 | + token := splitHeader[1] |
| 79 | + for _, validToken := range m.validTokens { |
| 80 | + if token == validToken { |
| 81 | + return true |
| 82 | + } |
| 83 | + } |
| 84 | + return false |
| 85 | +} |
| 86 | + |
| 87 | +func (m *mockPrometheusServer) requestAuthenticated(req *http.Request) bool { |
| 88 | + return req.Header.Get("Authorization") != "" |
| 89 | +} |
0 commit comments