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feat(alerting): custom alert support endpoint errors (#844)

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* feat(alerting): add support for including endpoint errors in custom alerts

- Updated `buildHTTPRequest` method in `AlertProvider` to accept a `result` parameter.
- Added support for including `[ENDPOINT_ERRORS]` in both the request body and URL, which will be replaced by the errors from `Result.Errors[]`.
- Adjusted `CreateExternalEndpointResult` to capture and store errors from query parameters.
- This allows custom alerts to include detailed error information, enhancing the flexibility of alert notifications.

* feat: add ENDPOINT_ERRORS example

* feat: add tests

* Refactor: code review feedback

* delete unsed errors

* Update README.md

* Apply suggestions from code review

---------

Co-authored-by: raojinlin <raojinlin302@gmail.com>
Co-authored-by: TwiN <twin@linux.com>
This commit is contained in:
raojinlin 2024-09-18 10:26:21 +08:00 committed by GitHub
parent b0c2f1eba9
commit 59842d5e88
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5 changed files with 88 additions and 9 deletions
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6
README.md
View File

@ -307,12 +307,13 @@ external-endpoints:
To push the status of an external endpoint, the request would have to look like this:
```
POST /api/v1/endpoints/{key}/external?success={success}
POST /api/v1/endpoints/{key}/external?success={success}&error={error}
```
Where:
- `{key}` has the pattern `<GROUP_NAME>_<ENDPOINT_NAME>` in which both variables have ` `, `/`, `_`, `,` and `.` replaced by `-`.
- Using the example configuration above, the key would be `core_ext-ep-test`.
- `{success}` is a boolean (`true` or `false`) value indicating whether the health check was successful or not.
- `{error}`: a string describing the reason for a failed health check. If {success} is false, this should contain the error message; if the check is successful, it can be omitted or left empty.
You must also pass the token as a `Bearer` token in the `Authorization` header.
@ -1357,6 +1358,7 @@ Furthermore, you may use the following placeholders in the body (`alerting.custo
- `[ENDPOINT_NAME]` (resolved from `endpoints[].name`)
- `[ENDPOINT_GROUP]` (resolved from `endpoints[].group`)
- `[ENDPOINT_URL]` (resolved from `endpoints[].url`)
- `[RESULT_ERRORS]` (resolved from the health evaluation of a given health check)
If you have an alert using the `custom` provider with `send-on-resolved` set to `true`, you can use the
`[ALERT_TRIGGERED_OR_RESOLVED]` placeholder to differentiate the notifications.
@ -1371,7 +1373,7 @@ alerting:
method: "POST"
body: |
{
"text": "[ALERT_TRIGGERED_OR_RESOLVED]: [ENDPOINT_GROUP] - [ENDPOINT_NAME] - [ALERT_DESCRIPTION]"
"text": "[ALERT_TRIGGERED_OR_RESOLVED]: [ENDPOINT_GROUP] - [ENDPOINT_NAME] - [ALERT_DESCRIPTION] - [RESULT_ERRORS]"
}
endpoints:
- name: website

6
alerting/provider/custom/custom.go
View File

@ -50,7 +50,7 @@ func (provider *AlertProvider) GetAlertStatePlaceholderValue(resolved bool) stri
return status
}
func (provider *AlertProvider) buildHTTPRequest(ep *endpoint.Endpoint, alert *alert.Alert, resolved bool) *http.Request {
func (provider *AlertProvider) buildHTTPRequest(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) *http.Request {
body, url, method := provider.Body, provider.URL, provider.Method
body = strings.ReplaceAll(body, "[ALERT_DESCRIPTION]", alert.GetDescription())
url = strings.ReplaceAll(url, "[ALERT_DESCRIPTION]", alert.GetDescription())
@ -60,6 +60,8 @@ func (provider *AlertProvider) buildHTTPRequest(ep *endpoint.Endpoint, alert *al
url = strings.ReplaceAll(url, "[ENDPOINT_GROUP]", ep.Group)
body = strings.ReplaceAll(body, "[ENDPOINT_URL]", ep.URL)
url = strings.ReplaceAll(url, "[ENDPOINT_URL]", ep.URL)
body = strings.ReplaceAll(body, "[RESULT_ERRORS]", strings.Join(result.Errors, ","))
url = strings.ReplaceAll(url, "[RESULT_ERRORS]", strings.Join(result.Errors, ","))
if resolved {
body = strings.ReplaceAll(body, "[ALERT_TRIGGERED_OR_RESOLVED]", provider.GetAlertStatePlaceholderValue(true))
url = strings.ReplaceAll(url, "[ALERT_TRIGGERED_OR_RESOLVED]", provider.GetAlertStatePlaceholderValue(true))
@ -79,7 +81,7 @@ func (provider *AlertProvider) buildHTTPRequest(ep *endpoint.Endpoint, alert *al
}
func (provider *AlertProvider) Send(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) error {
request := provider.buildHTTPRequest(ep, alert, resolved)
request := provider.buildHTTPRequest(ep, alert, result, resolved)
response, err := client.GetHTTPClient(provider.ClientConfig).Do(request)
if err != nil {
return err

48
alerting/provider/custom/custom_test.go
View File

@ -140,6 +140,53 @@ func TestAlertProvider_buildHTTPRequest(t *testing.T) {
request := customAlertProvider.buildHTTPRequest(
&endpoint.Endpoint{Name: "endpoint-name", Group: "endpoint-group", URL: "https://example.com"},
&alert.Alert{Description: &alertDescription},
&endpoint.Result{Errors: []string{}},
scenario.Resolved,
)
if request.URL.String() != scenario.ExpectedURL {
t.Error("expected URL to be", scenario.ExpectedURL, "got", request.URL.String())
}
body, _ := io.ReadAll(request.Body)
if string(body) != scenario.ExpectedBody {
t.Error("expected body to be", scenario.ExpectedBody, "got", string(body))
}
})
}
}
func TestAlertProviderWithResultErrors_buildHTTPRequest(t *testing.T) {
customAlertWithErrorsProvider := &AlertProvider{
URL: "https://example.com/[ENDPOINT_GROUP]/[ENDPOINT_NAME]?event=[ALERT_TRIGGERED_OR_RESOLVED]&description=[ALERT_DESCRIPTION]&url=[ENDPOINT_URL]&error=[RESULT_ERRORS]",
Body: "[ENDPOINT_NAME],[ENDPOINT_GROUP],[ALERT_DESCRIPTION],[ENDPOINT_URL],[ALERT_TRIGGERED_OR_RESOLVED],[RESULT_ERRORS]",
}
alertDescription := "alert-description"
scenarios := []struct {
AlertProvider *AlertProvider
Resolved bool
ExpectedURL string
ExpectedBody string
Errors []string
}{
{
AlertProvider: customAlertWithErrorsProvider,
Resolved: true,
ExpectedURL: "https://example.com/endpoint-group/endpoint-name?event=RESOLVED&description=alert-description&url=https://example.com&error=",
ExpectedBody: "endpoint-name,endpoint-group,alert-description,https://example.com,RESOLVED,",
},
{
AlertProvider: customAlertWithErrorsProvider,
Resolved: false,
ExpectedURL: "https://example.com/endpoint-group/endpoint-name?event=TRIGGERED&description=alert-description&url=https://example.com&error=error1,error2",
ExpectedBody: "endpoint-name,endpoint-group,alert-description,https://example.com,TRIGGERED,error1,error2",
Errors: []string{"error1", "error2"},
},
}
for _, scenario := range scenarios {
t.Run(fmt.Sprintf("resolved-%v-with-default-placeholders-and-result-errors", scenario.Resolved), func(t *testing.T) {
request := customAlertWithErrorsProvider.buildHTTPRequest(
&endpoint.Endpoint{Name: "endpoint-name", Group: "endpoint-group", URL: "https://example.com"},
&alert.Alert{Description: &alertDescription},
&endpoint.Result{Errors: scenario.Errors},
scenario.Resolved,
)
if request.URL.String() != scenario.ExpectedURL {
@ -190,6 +237,7 @@ func TestAlertProvider_buildHTTPRequestWithCustomPlaceholder(t *testing.T) {
request := customAlertProvider.buildHTTPRequest(
&endpoint.Endpoint{Name: "endpoint-name", Group: "endpoint-group"},
&alert.Alert{Description: &alertDescription},
&endpoint.Result{},
scenario.Resolved,
)
if request.URL.String() != scenario.ExpectedURL {

3
api/external_endpoint.go
View File

@ -46,6 +46,9 @@ func CreateExternalEndpointResult(cfg *config.Config) fiber.Handler {
Success: c.QueryBool("success"),
Errors: []string{},
}
if !result.Success && c.Query("error") != "" {
result.Errors = append(result.Errors, c.Query("error"))
}
convertedEndpoint := externalEndpoint.ToEndpoint()
if err := store.Get().Insert(convertedEndpoint, result); err != nil {
if errors.Is(err, common.ErrEndpointNotFound) {

34
api/external_endpoint_test.go
View File

@ -76,6 +76,12 @@ func TestCreateExternalEndpointResult(t *testing.T) {
AuthorizationHeaderBearerToken: "Bearer token",
ExpectedCode: 200,
},
{
Name: "good-token-success-true-with-ignored-error-because-success-true",
Path: "/api/v1/endpoints/g_n/external?success=true&error=failed",
AuthorizationHeaderBearerToken: "Bearer token",
ExpectedCode: 200,
},
{
Name: "good-token-success-false",
Path: "/api/v1/endpoints/g_n/external?success=false",
@ -88,6 +94,12 @@ func TestCreateExternalEndpointResult(t *testing.T) {
AuthorizationHeaderBearerToken: "Bearer token",
ExpectedCode: 200,
},
{
Name: "good-token-success-false-with-error",
Path: "/api/v1/endpoints/g_n/external?success=false&error=failed",
AuthorizationHeaderBearerToken: "Bearer token",
ExpectedCode: 200,
},
}
for _, scenario := range scenarios {
t.Run(scenario.Name, func(t *testing.T) {
@ -114,21 +126,33 @@ func TestCreateExternalEndpointResult(t *testing.T) {
if endpointStatus.Key != "g_n" {
t.Errorf("expected key to be g_n but got %s", endpointStatus.Key)
}
if len(endpointStatus.Results) != 3 {
if len(endpointStatus.Results) != 5 {
t.Errorf("expected 3 results but got %d", len(endpointStatus.Results))
}
if !endpointStatus.Results[0].Success {
t.Errorf("expected first result to be successful")
}
if endpointStatus.Results[1].Success {
t.Errorf("expected second result to be unsuccessful")
if !endpointStatus.Results[1].Success {
t.Errorf("expected second result to be successful")
}
if len(endpointStatus.Results[1].Errors) > 0 {
t.Errorf("expected second result to have no errors")
}
if endpointStatus.Results[2].Success {
t.Errorf("expected third result to be unsuccessful")
}
if endpointStatus.Results[3].Success {
t.Errorf("expected fourth result to be unsuccessful")
}
if endpointStatus.Results[4].Success {
t.Errorf("expected fifth result to be unsuccessful")
}
if len(endpointStatus.Results[4].Errors) == 0 || endpointStatus.Results[4].Errors[0] != "failed" {
t.Errorf("expected fifth result to have errors: failed")
}
externalEndpointFromConfig := cfg.GetExternalEndpointByKey("g_n")
if externalEndpointFromConfig.NumberOfFailuresInARow != 2 {
t.Errorf("expected 2 failures in a row but got %d", externalEndpointFromConfig.NumberOfFailuresInARow)
if externalEndpointFromConfig.NumberOfFailuresInARow != 3 {
t.Errorf("expected 3 failures in a row but got %d", externalEndpointFromConfig.NumberOfFailuresInARow)
}
if externalEndpointFromConfig.NumberOfSuccessesInARow != 0 {
t.Errorf("expected 0 successes in a row but got %d", externalEndpointFromConfig.NumberOfSuccessesInARow)