feat(alerting): Implement GitHub alerting provider
This commit is contained in:
TwiN
129
alerting/provider/github/github.go
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129
alerting/provider/github/github.go
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@ -0,0 +1,129 @@
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package github
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import (
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"context"
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"fmt"
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"net/url"
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"strings"
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"time"
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"github.com/TwiN/gatus/v5/alerting/alert"
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"github.com/TwiN/gatus/v5/core"
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"github.com/google/go-github/v48/github"
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"golang.org/x/oauth2"
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)
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// AlertProvider is the configuration necessary for sending an alert using Discord
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type AlertProvider struct {
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RepositoryURL string `yaml:"repository-url"` // The URL of the GitHub repository to create issues in
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Token string `yaml:"token"` // Token requires at least RW on issues and RO on metadata
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// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
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DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
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username string
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repositoryOwner string
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repositoryName string
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githubClient *github.Client
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}
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// IsValid returns whether the provider's configuration is valid
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func (provider *AlertProvider) IsValid() bool {
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if len(provider.Token) == 0 || len(provider.RepositoryURL) == 0 {
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return false
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}
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// Validate format of the repository URL
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repositoryURL, err := url.Parse(provider.RepositoryURL)
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if err != nil {
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return false
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}
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baseURL := repositoryURL.Scheme + "://" + repositoryURL.Host
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pathParts := strings.Split(repositoryURL.Path, "/")
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if len(pathParts) != 3 {
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return false
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}
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provider.repositoryOwner = pathParts[1]
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provider.repositoryName = pathParts[2]
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// Create oauth2 HTTP client with GitHub token
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httpClientWithStaticTokenSource := oauth2.NewClient(context.Background(), oauth2.StaticTokenSource(&oauth2.Token{
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AccessToken: provider.Token,
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}))
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// Create GitHub client
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if baseURL == "https://github.com" {
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provider.githubClient = github.NewClient(httpClientWithStaticTokenSource)
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} else {
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provider.githubClient, err = github.NewEnterpriseClient(baseURL, baseURL, httpClientWithStaticTokenSource)
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if err != nil {
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return false
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}
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}
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// Retrieve the username once to validate that the token is valid
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ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
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defer cancel()
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user, _, err := provider.githubClient.Users.Get(ctx, "")
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if err != nil {
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return false
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}
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provider.username = *user.Login
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return true
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}
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// Send creates an issue in the designed RepositoryURL if the resolved parameter passed is false,
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// or closes the relevant issue(s) if the resolved parameter passed is true.
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func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
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title := "alert(gatus): " + endpoint.DisplayName()
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if !resolved {
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_, _, err := provider.githubClient.Issues.Create(context.Background(), provider.repositoryOwner, provider.repositoryName, &github.IssueRequest{
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Title: github.String(title),
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Body: github.String(provider.buildIssueBody(endpoint, alert, result)),
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})
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if err != nil {
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return fmt.Errorf("failed to create issue: %w", err)
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}
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} else {
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issues, _, err := provider.githubClient.Issues.ListByRepo(context.Background(), provider.repositoryOwner, provider.repositoryName, &github.IssueListByRepoOptions{
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State: "open",
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Creator: provider.username,
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ListOptions: github.ListOptions{PerPage: 100},
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})
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if err != nil {
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return fmt.Errorf("failed to list issues: %w", err)
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}
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for _, issue := range issues {
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if *issue.Title == title {
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_, _, err = provider.githubClient.Issues.Edit(context.Background(), provider.repositoryOwner, provider.repositoryName, *issue.Number, &github.IssueRequest{
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State: github.String("closed"),
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})
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if err != nil {
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return fmt.Errorf("failed to close issue: %w", err)
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}
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}
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}
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}
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return nil
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}
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// buildIssueBody builds the body of the issue
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func (provider *AlertProvider) buildIssueBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result) string {
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var results string
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for _, conditionResult := range result.ConditionResults {
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var prefix string
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if conditionResult.Success {
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prefix = ":white_check_mark:"
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} else {
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prefix = ":x:"
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}
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results += fmt.Sprintf("- %s - `%s`\n", prefix, conditionResult.Condition)
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}
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var description string
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if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
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description = ":\n> " + alertDescription
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}
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message := fmt.Sprintf("An alert for **%s** has been triggered due to having failed %d time(s) in a row", endpoint.DisplayName(), alert.FailureThreshold)
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return message + description + "\n\n## Condition results\n" + results
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}
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// GetDefaultAlert returns the provider's default alert configuration
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func (provider AlertProvider) GetDefaultAlert() *alert.Alert {
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return provider.DefaultAlert
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}
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158
alerting/provider/github/github_test.go
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158
alerting/provider/github/github_test.go
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@ -0,0 +1,158 @@
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package github
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import (
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"net/http"
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"strings"
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"testing"
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"github.com/TwiN/gatus/v5/alerting/alert"
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"github.com/TwiN/gatus/v5/client"
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"github.com/TwiN/gatus/v5/core"
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"github.com/TwiN/gatus/v5/test"
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"github.com/google/go-github/v48/github"
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)
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func TestAlertDefaultProvider_IsValid(t *testing.T) {
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scenarios := []struct {
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Name string
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Provider AlertProvider
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Expected bool
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}{
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{
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Name: "invalid",
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Provider: AlertProvider{RepositoryURL: "", Token: ""},
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Expected: false,
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},
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{
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Name: "invalid-token",
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Provider: AlertProvider{RepositoryURL: "https://github.com/TwiN/test", Token: "12345"},
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Expected: false,
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},
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{
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Name: "missing-repository-name",
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Provider: AlertProvider{RepositoryURL: "https://github.com/TwiN", Token: "12345"},
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Expected: false,
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},
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{
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Name: "enterprise-client",
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Provider: AlertProvider{RepositoryURL: "https://github.example.com/TwiN/test", Token: "12345"},
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Expected: false,
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},
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{
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Name: "invalid-url",
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Provider: AlertProvider{RepositoryURL: "github.com/TwiN/test", Token: "12345"},
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Expected: false,
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},
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}
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for _, scenario := range scenarios {
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t.Run(scenario.Name, func(t *testing.T) {
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if scenario.Provider.IsValid() != scenario.Expected {
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t.Errorf("expected %t, got %t", scenario.Expected, scenario.Provider.IsValid())
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}
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})
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}
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}
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func TestAlertProvider_Send(t *testing.T) {
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defer client.InjectHTTPClient(nil)
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firstDescription := "description-1"
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secondDescription := "description-2"
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scenarios := []struct {
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Name string
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Provider AlertProvider
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Alert alert.Alert
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Resolved bool
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MockRoundTripper test.MockRoundTripper
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ExpectedError bool
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}{
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{
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Name: "triggered-error",
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Provider: AlertProvider{RepositoryURL: "https://github.com/TwiN/test", Token: "12345"},
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Alert: alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
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Resolved: false,
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ExpectedError: true,
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},
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{
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Name: "resolved-error",
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Provider: AlertProvider{RepositoryURL: "https://github.com/TwiN/test", Token: "12345"},
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Alert: alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
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Resolved: true,
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ExpectedError: true,
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},
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}
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for _, scenario := range scenarios {
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t.Run(scenario.Name, func(t *testing.T) {
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scenario.Provider.githubClient = github.NewClient(nil)
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client.InjectHTTPClient(&http.Client{Transport: scenario.MockRoundTripper})
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err := scenario.Provider.Send(
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&core.Endpoint{Name: "endpoint-name", Group: "endpoint-group"},
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&scenario.Alert,
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&core.Result{
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ConditionResults: []*core.ConditionResult{
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{Condition: "[CONNECTED] == true", Success: scenario.Resolved},
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{Condition: "[STATUS] == 200", Success: scenario.Resolved},
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},
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},
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scenario.Resolved,
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)
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if scenario.ExpectedError && err == nil {
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t.Error("expected error, got none")
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}
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if !scenario.ExpectedError && err != nil {
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t.Error("expected no error, got", err.Error())
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}
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})
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}
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}
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func TestAlertProvider_buildRequestBody(t *testing.T) {
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firstDescription := "description-1"
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scenarios := []struct {
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Name string
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Endpoint core.Endpoint
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Provider AlertProvider
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Alert alert.Alert
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ExpectedBody string
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}{
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{
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Name: "triggered",
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Endpoint: core.Endpoint{Name: "endpoint-name", URL: "https://example.org"},
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Provider: AlertProvider{},
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Alert: alert.Alert{Description: &firstDescription, FailureThreshold: 3},
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ExpectedBody: "An alert for **endpoint-name** has been triggered due to having failed 3 time(s) in a row:\n> description-1\n\n## Condition results\n- :white_check_mark: - `[CONNECTED] == true`\n- :x: - `[STATUS] == 200`",
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},
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{
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Name: "no-description",
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Endpoint: core.Endpoint{Name: "endpoint-name", URL: "https://example.org"},
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Provider: AlertProvider{},
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Alert: alert.Alert{FailureThreshold: 10},
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ExpectedBody: "An alert for **endpoint-name** has been triggered due to having failed 10 time(s) in a row\n\n## Condition results\n- :white_check_mark: - `[CONNECTED] == true`\n- :x: - `[STATUS] == 200`",
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},
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}
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for _, scenario := range scenarios {
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t.Run(scenario.Name, func(t *testing.T) {
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body := scenario.Provider.buildIssueBody(
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&scenario.Endpoint,
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&scenario.Alert,
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&core.Result{
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ConditionResults: []*core.ConditionResult{
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{Condition: "[CONNECTED] == true", Success: true},
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{Condition: "[STATUS] == 200", Success: false},
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},
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},
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)
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if strings.TrimSpace(body) != strings.TrimSpace(scenario.ExpectedBody) {
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t.Errorf("expected:\n%s\ngot:\n%s", scenario.ExpectedBody, body)
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}
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})
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}
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}
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func TestAlertProvider_GetDefaultAlert(t *testing.T) {
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if (AlertProvider{DefaultAlert: &alert.Alert{}}).GetDefaultAlert() == nil {
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t.Error("expected default alert to be not nil")
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}
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if (AlertProvider{DefaultAlert: nil}).GetDefaultAlert() != nil {
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t.Error("expected default alert to be nil")
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}
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}
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@ -5,6 +5,7 @@ import (
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"github.com/TwiN/gatus/v5/alerting/provider/custom"
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"github.com/TwiN/gatus/v5/alerting/provider/discord"
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"github.com/TwiN/gatus/v5/alerting/provider/email"
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"github.com/TwiN/gatus/v5/alerting/provider/github"
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"github.com/TwiN/gatus/v5/alerting/provider/googlechat"
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"github.com/TwiN/gatus/v5/alerting/provider/matrix"
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"github.com/TwiN/gatus/v5/alerting/provider/mattermost"
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@ -58,6 +59,7 @@ var (
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_ AlertProvider = (*custom.AlertProvider)(nil)
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_ AlertProvider = (*discord.AlertProvider)(nil)
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_ AlertProvider = (*email.AlertProvider)(nil)
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_ AlertProvider = (*github.AlertProvider)(nil)
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_ AlertProvider = (*googlechat.AlertProvider)(nil)
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_ AlertProvider = (*matrix.AlertProvider)(nil)
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_ AlertProvider = (*mattermost.AlertProvider)(nil)
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