Adding code to address docker healthcheck issue #1285
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| package main | ||
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| import ( | ||
| "flag" | ||
| "fmt" | ||
| "log" | ||
| "net/http" | ||
| "os" | ||
| "strconv" | ||
| ) | ||
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| func main() { | ||
| const host = "127.0.0.1" // default host | ||
| usedPort := "13133" // default port | ||
| const path = "/" //default path | ||
| generateCmd := flag.NewFlagSet("generate", flag.ExitOnError) | ||
| port := generateCmd.String("port", usedPort, "Specify collector health-check port") | ||
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| if len(os.Args) > 1 { | ||
| err := generateCmd.Parse(os.Args[1:]) | ||
| if err != nil { | ||
| log.Fatalf("%s", err) | ||
| } | ||
| } | ||
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| validationErr := validatePort(*port) | ||
| if validationErr != nil { | ||
| log.Fatalf("%s", validationErr) | ||
| } | ||
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| status, healthCheckError := executeHealthCheck(host, port, path) | ||
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| if healthCheckError != nil { | ||
| log.Fatalf(healthCheckError.Error()) | ||
| } | ||
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| log.Printf(status) | ||
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| } | ||
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| func executeHealthCheck(host string, port *string, path string) (string, error) { | ||
| resp, err := http.Get(fmt.Sprint("http://", host, ":", *port, path)) | ||
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| if err != nil { | ||
| return "", fmt.Errorf("unable to retrieve health status: %s", err.Error()) | ||
| } | ||
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| if resp.StatusCode != 200 { | ||
| return "", fmt.Errorf("STATUS: %d", resp.StatusCode) | ||
| } | ||
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| return fmt.Sprintf("STATUS: %d", resp.StatusCode), nil | ||
| } | ||
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| // validatePort checks if the port configuration is valid | ||
| func validatePort(port string) error { | ||
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| portInt, err := strconv.Atoi(port) | ||
| if err != nil { | ||
| return fmt.Errorf("invalid port: %w", err) | ||
| } | ||
| if portInt < 1 || portInt > 65535 { | ||
| return fmt.Errorf("port outside of range [1:65535]: %d", portInt) | ||
| } | ||
| return nil | ||
|
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||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "github.com/stretchr/testify/assert" | ||
| "github.com/stretchr/testify/require" | ||
| "net" | ||
| "net/http" | ||
| "net/http/httptest" | ||
| "os" | ||
| "testing" | ||
| ) | ||
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| func TestHealthStatusHealthy(t *testing.T) { | ||
| server := setUpMockCollector(t, "127.0.0.1:13133", http.StatusOK) | ||
| os.Args = []string{"-port=13133"} | ||
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| defer server.Close() | ||
| port := "13133" | ||
| got, err := executeHealthCheck("127.0.0.1", &port, "/") | ||
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| expectedErrorString := "STATUS: 200" | ||
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| assert.Contains(t, got, expectedErrorString, | ||
| fmt.Sprintf("Unexpected log message. Got %s but should contain %s", got, expectedErrorString)) | ||
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| assert.NoError(t, err) | ||
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| } | ||
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| func TestHealthStatusUnhealthy(t *testing.T) { | ||
| server := setUpMockCollector(t, "127.0.0.1:13133", http.StatusInternalServerError) | ||
| os.Args = []string{"-port=13133"} | ||
| defer server.Close() | ||
| port := "13133" | ||
| got, err := executeHealthCheck("127.0.0.1", &port, "/") | ||
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| expectedErrorString := "STATUS: 500" | ||
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| assert.Contains(t, err.Error(), expectedErrorString, | ||
| fmt.Sprintf("Unexpected log message. Got %s but should contain %s", got, expectedErrorString)) | ||
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| } | ||
| func TestHealthStatusServerDown(t *testing.T) { | ||
| server := setUpMockCollector(t, "127.0.0.1:13132", http.StatusInternalServerError) | ||
| os.Args = []string{"-port=13133"} | ||
| defer server.Close() | ||
| port := "13133" | ||
| got, err := executeHealthCheck("127.0.0.1", &port, "/") | ||
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| expectedErrorString := "unable to retrieve health status" | ||
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| assert.Contains(t, err.Error(), expectedErrorString, | ||
| fmt.Sprintf("Unexpected log message. Got %s but should contain %s", got, expectedErrorString)) | ||
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| } | ||
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| func setUpMockCollector(t *testing.T, healthCheckDefaultEndpoint string, statusCode int) *httptest.Server { | ||
| l, err := net.Listen("tcp", healthCheckDefaultEndpoint) | ||
| require.NoError(t, err) | ||
| server := httptest.NewUnstartedServer(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) { | ||
| rw.WriteHeader(statusCode) | ||
| })) | ||
| server.Listener.Close() | ||
| server.Listener = l | ||
| server.Start() | ||
| return server | ||
| } | ||
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| func TestValidatePort(t *testing.T) { | ||
| testCases := []struct { | ||
| name string | ||
| port string | ||
| errorExpected bool | ||
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|
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| }{ | ||
| { | ||
| name: "WrongString", | ||
| port: "StringPort", | ||
| errorExpected: true, | ||
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| }, | ||
| { | ||
| name: "EmptyString", | ||
| port: "", | ||
| errorExpected: true, | ||
| }, | ||
| { | ||
| name: "WrongPort", | ||
| port: "65536", | ||
| errorExpected: true, | ||
| }, | ||
| { | ||
| name: "ValidPort", | ||
| port: "13133", | ||
| errorExpected: false, | ||
| }, | ||
| } | ||
| for _, tc := range testCases { | ||
| t.Run(tc.name, func(t *testing.T) { | ||
| err := validatePort(tc.port) | ||
| if tc.errorExpected { | ||
| assert.Error(t, err) | ||
| } else { | ||
| assert.NoError(t, err) | ||
| } | ||
| }) | ||
| } | ||
| } | ||
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When does this get utilized?
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As per your initial comment I added build commands for other architectures..