githubexporter · henrymcconville · Oct 22, 2025 · Oct 22, 2025 · Oct 22, 2025
diff --git a/README.md b/README.md
@@ -6,23 +6,28 @@ Exposes basic metrics for your repositories from the GitHub API, to a Prometheus
 
 This exporter is configured via environment variables. All variables are optional unless otherwise stated. Below is a list of supported configuration values:
 
-| Variable                     | Description                                                                        | Default                  |
-|------------------------------|------------------------------------------------------------------------------------|--------------------------|
-| `ORGS`                       | Comma-separated list of GitHub organizations to monitor (e.g. `org1,org2`).        |                          |
-| `REPOS`                      | Comma-separated list of repositories to monitor (e.g. `user/repo1,user/repo2`).    |                          |
-| `USERS`                      | Comma-separated list of GitHub users to monitor (e.g. `user1,user2`).              |                          |
-| `GITHUB_TOKEN`               | GitHub personal access token for API authentication.                               |                          |
-| `GITHUB_TOKEN_FILE`          | Path to a file containing a GitHub personal access token.                          |                          |
-| `GITHUB_APP`                 | Set to `true` to authenticate as a GitHub App.                                     | `false`                  |
-| `GITHUB_APP_ID`              | The App ID of the GitHub App. Required if `GITHUB_APP` is `true`.                  |                          |
-| `GITHUB_APP_INSTALLATION_ID` | The Installation ID of the GitHub App. Required if `GITHUB_APP` is `true`.         |                          |
-| `GITHUB_APP_KEY_PATH`        | Path to the GitHub App private key file. Required if `GITHUB_APP` is `true`.       |                          |
-| `GITHUB_RATE_LIMIT_ENABLED`  | Whether to fetch GitHub API rate limit metrics (`true` or `false`).                | `true`                   |
-| `GITHUB_RESULTS_PER_PAGE`    | Number of results to request per page from the GitHub API (max 100).               | `100`                    |
-| `API_URL`                    | GitHub API URL. You should not need to change this unless using GitHub Enterprise. | `https://api.github.com` |
-| `LISTEN_PORT`                | The port the exporter will listen on.                                              | `9171`                   |
-| `METRICS_PATH`               | The HTTP path to expose Prometheus metrics.                                        | `/metrics`               |
-| `LOG_LEVEL`                  | Logging level (`debug`, `info`, `warn`, `error`).                                  | `info`                   |
+| Variable                      | Description                                                                        | Default                  |
+|-------------------------------|------------------------------------------------------------------------------------|--------------------------|
+| `ORGS`                        | Comma-separated list of GitHub organizations to monitor (e.g. `org1,org2`).        |                          |
+| `REPOS`                       | Comma-separated list of repositories to monitor (e.g. `user/repo1,user/repo2`).    |                          |
+| `USERS`                       | Comma-separated list of GitHub users to monitor (e.g. `user1,user2`).              |                          |
+| `GITHUB_TOKEN`                | GitHub personal access token for API authentication.                               |                          |
+| `GITHUB_TOKEN_FILE`           | Path to a file containing a GitHub personal access token.                          |                          |
+| `GITHUB_APP`                  | Set to `true` to authenticate as a GitHub App.                                     | `false`                  |
+| `GITHUB_APP_ID`               | The App ID of the GitHub App. Required if `GITHUB_APP` is `true`.                  |                          |
+| `GITHUB_APP_INSTALLATION_ID`  | The Installation ID of the GitHub App. Required if `GITHUB_APP` is `true`.         |                          |
+| `GITHUB_APP_KEY_PATH`         | Path to the GitHub App private key file. Required if `GITHUB_APP` is `true`.       |                          |
+| `GITHUB_RATE_LIMIT_ENABLED`   | Whether to fetch GitHub API rate limit metrics (`true` or `false`).                | `true`                   |
+| `GITHUB_RESULTS_PER_PAGE`     | Number of results to request per page from the GitHub API (max 100).               | `100`                    |
+| `FETCH_REPO_RELEASES_ENABLED` | Whether to fetch repository release metrics (`true` or `false`).                   | `true`                   |
+| `FETCH_ORGS_CONCURRENCY`      | Number of concurrent requests to make when fetching organization data.             | `1`                      |
+| `FETCH_ORG_REPOS_CONCURRENCY` | Number of concurrent requests to make when fetching organization repository data.  | `1`                      |
+| `FETCH_USERS_CONCURRENCY`     | Number of concurrent requests to make when fetching user data.                     | `1`                      |
+| `FETCH_USERS_CONCURRENCY`     | Number of concurrent requests to make when fetching repository data.               | `1`                      |
+| `API_URL`                     | GitHub API URL. You should not need to change this unless using GitHub Enterprise. | `https://api.github.com` |
+| `LISTEN_PORT`                 | The port the exporter will listen on.                                              | `9171`                   |
+| `METRICS_PATH`                | The HTTP path to expose Prometheus metrics.                                        | `/metrics`               |
+| `LOG_LEVEL`                   | Logging level (`debug`, `info`, `warn`, `error`).                                  | `info`                   |
 
 ### Credential Precedence
 

diff --git a/VERSION b/VERSION
@@ -1 +1 @@
-v2.0.2
+v2.1.0
diff --git a/config/config.go b/config/config.go
@@ -16,19 +16,24 @@ import (
 
 // Config struct holds runtime configuration required for the application
 type Config struct {
-	MetricsPath            string   `envconfig:"METRICS_PATH" required:"false" default:"/metrics"`
-	ListenPort             string   `envconfig:"LISTEN_PORT" required:"false" default:"9171"`
-	LogLevel               string   `envconfig:"LOG_LEVEL" required:"false" default:"INFO"`
-	ApiUrl                 *url.URL `envconfig:"API_URL" required:"false" default:"https://api.github.com"`
-	Repositories           []string `envconfig:"REPOS" required:"false"`
-	Organisations          []string `envconfig:"ORGS" required:"false"`
-	Users                  []string `envconfig:"USERS" required:"false"`
-	GitHubResultsPerPage   int      `envconfig:"GITHUB_RESULTS_PER_PAGE" required:"false" default:"100"`
-	GithubToken            string   `envconfig:"GITHUB_TOKEN" required:"false"`
-	GithubTokenFile        string   `envconfig:"GITHUB_TOKEN_FILE" required:"false"`
-	GitHubApp              bool     `envconfig:"GITHUB_APP" required:"false" default:"false"`
-	GitHubRateLimitEnabled bool     `envconfig:"GITHUB_RATE_LIMIT_ENABLED" required:"false" default:"true"`
-	*GitHubAppConfig       `ignored:"true"`
+	MetricsPath              string   `envconfig:"METRICS_PATH" required:"false" default:"/metrics"`
+	ListenPort               string   `envconfig:"LISTEN_PORT" required:"false" default:"9171"`
+	LogLevel                 string   `envconfig:"LOG_LEVEL" required:"false" default:"INFO"`
+	ApiUrl                   *url.URL `envconfig:"API_URL" required:"false" default:"https://api.github.com"`
+	Repositories             []string `envconfig:"REPOS" required:"false"`
+	Organisations            []string `envconfig:"ORGS" required:"false"`
+	Users                    []string `envconfig:"USERS" required:"false"`
+	GitHubResultsPerPage     int      `envconfig:"GITHUB_RESULTS_PER_PAGE" required:"false" default:"100"`
+	GithubToken              string   `envconfig:"GITHUB_TOKEN" required:"false"`
+	GithubTokenFile          string   `envconfig:"GITHUB_TOKEN_FILE" required:"false"`
+	GitHubApp                bool     `envconfig:"GITHUB_APP" required:"false" default:"false"`
+	GitHubRateLimitEnabled   bool     `envconfig:"GITHUB_RATE_LIMIT_ENABLED" required:"false" default:"true"`
+	FetchRepoReleasesEnabled bool     `envconfig:"FETCH_REPO_RELEASES_ENABLED" required:"false" default:"true"`
+	FetchOrgsConcurrency     int      `envconfig:"FETCH_ORGS_CONCURRENCY" required:"false" default:"1"`
+	FetchOrgReposConcurrency int      `envconfig:"FETCH_ORG_REPOS_CONCURRENCY" required:"false" default:"1"`
+	FetchReposConcurrency    int      `envconfig:"FETCH_REPOS_CONCURRENCY" required:"false" default:"1"`
+	FetchUsersConcurrency    int      `envconfig:"FETCH_USERS_CONCURRENCY" required:"false" default:"1"`
+	*GitHubAppConfig         `ignored:"true"`
 }
 
 type GitHubAppConfig struct {

diff --git a/config/config_test.go b/config/config_test.go
@@ -25,31 +25,41 @@ func TestConfig(t *testing.T) {
 					Scheme: "https",
 					Host:   "api.github.com",
 				},
-				Repositories:           []string{},
-				Organisations:          []string{},
-				Users:                  []string{},
-				GitHubResultsPerPage:   100,
-				GithubToken:            "",
-				GithubTokenFile:        "",
-				GitHubApp:              false,
-				GitHubAppConfig:        nil,
-				GitHubRateLimitEnabled: true,
+				Repositories:             []string{},
+				Organisations:            []string{},
+				Users:                    []string{},
+				GitHubResultsPerPage:     100,
+				GithubToken:              "",
+				GithubTokenFile:          "",
+				GitHubApp:                false,
+				GitHubAppConfig:          nil,
+				GitHubRateLimitEnabled:   true,
+				FetchRepoReleasesEnabled: true,
+				FetchOrgsConcurrency:     1,
+				FetchOrgReposConcurrency: 1,
+				FetchReposConcurrency:    1,
+				FetchUsersConcurrency:    1,
 			},
 			expectedErr: nil,
 		},
 		{
 			name: "non-default config",
 			envVars: map[string]string{
-				"METRICS_PATH":              "/otherendpoint",
-				"LISTEN_PORT":               "1111",
-				"LOG_LEVEL":                 "DEBUG",
-				"API_URL":                   "https://example.com",
-				"REPOS":                     "repo1, repo2",
-				"ORGS":                      "org1,org2 ",
-				"USERS":                     " user1, user2 ",
-				"GITHUB_RESULTS_PER_PAGE":   "50",
-				"GITHUB_TOKEN":              "token",
-				"GITHUB_RATE_LIMIT_ENABLED": "false",
+				"METRICS_PATH":                "/otherendpoint",
+				"LISTEN_PORT":                 "1111",
+				"LOG_LEVEL":                   "DEBUG",
+				"API_URL":                     "https://example.com",
+				"REPOS":                       "repo1, repo2",
+				"ORGS":                        "org1,org2 ",
+				"USERS":                       " user1, user2 ",
+				"GITHUB_RESULTS_PER_PAGE":     "50",
+				"GITHUB_TOKEN":                "token",
+				"GITHUB_RATE_LIMIT_ENABLED":   "false",
+				"FETCH_REPO_RELEASES_ENABLED": "false",
+				"FETCH_ORGS_CONCURRENCY":      "2",
+				"FETCH_ORG_REPOS_CONCURRENCY": "3",
+				"FETCH_REPOS_CONCURRENCY":     "4",
+				"FETCH_USERS_CONCURRENCY":     "5",
 			},
 			expectedCfg: &Config{
 				MetricsPath: "/otherendpoint",
@@ -71,12 +81,17 @@ func TestConfig(t *testing.T) {
 					"user1",
 					"user2",
 				},
-				GitHubResultsPerPage:   50,
-				GithubToken:            "token",
-				GithubTokenFile:        "",
-				GitHubApp:              false,
-				GitHubAppConfig:        nil,
-				GitHubRateLimitEnabled: false,
+				GitHubResultsPerPage:     50,
+				GithubToken:              "token",
+				GithubTokenFile:          "",
+				GitHubApp:                false,
+				GitHubAppConfig:          nil,
+				GitHubRateLimitEnabled:   false,
+				FetchRepoReleasesEnabled: false,
+				FetchOrgsConcurrency:     2,
+				FetchOrgReposConcurrency: 3,
+				FetchReposConcurrency:    4,
+				FetchUsersConcurrency:    5,
 			},
 			expectedErr: nil,
 		},