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Diffstat (limited to 'doc/book/reference-manual')
| -rw-r--r-- | doc/book/reference-manual/admin-api.md | 90 |
1 files changed, 87 insertions, 3 deletions
diff --git a/doc/book/reference-manual/admin-api.md b/doc/book/reference-manual/admin-api.md index 363bc886..6932ac60 100644 --- a/doc/book/reference-manual/admin-api.md +++ b/doc/book/reference-manual/admin-api.md @@ -39,11 +39,95 @@ Authorization: Bearer <token> ## Administration API endpoints -### Metrics-related endpoints - -#### Metrics `GET /metrics` +### Metrics `GET /metrics` Returns internal Garage metrics in Prometheus format. +The metrics are directly documented when returned by the API. + +**Example:** + +``` +$ curl -i http://localhost:3903/metrics +HTTP/1.1 200 OK +content-type: text/plain; version=0.0.4 +content-length: 12145 +date: Tue, 08 Aug 2023 07:25:05 GMT + +# HELP api_admin_error_counter Number of API calls to the various Admin API endpoints that resulted in errors +# TYPE api_admin_error_counter counter +api_admin_error_counter{api_endpoint="CheckWebsiteEnabled",status_code="400"} 1 +api_admin_error_counter{api_endpoint="CheckWebsiteEnabled",status_code="404"} 3 +# HELP api_admin_request_counter Number of API calls to the various Admin API endpoints +# TYPE api_admin_request_counter counter +api_admin_request_counter{api_endpoint="CheckWebsiteEnabled"} 7 +api_admin_request_counter{api_endpoint="Health"} 3 +# HELP api_admin_request_duration Duration of API calls to the various Admin API endpoints +... +``` + +### Health `GET /health` + +Returns `200 OK` if enough nodes are up to have a quorum (ie. serve requests), +otherwise returns `503 Service Unavailable`. + +**Example:** + +``` +$ curl -i http://localhost:3903/health +HTTP/1.1 200 OK +content-type: text/plain +content-length: 102 +date: Tue, 08 Aug 2023 07:22:38 GMT + +Garage is fully operational +Consult the full health check API endpoint at /v0/health for more details +``` + +### On-demand TLS `GET /check` + +To prevent abuses for on-demand TLS, Caddy developpers have specified an endpoint that can be queried by the reverse proxy +to know if a given domain is allowed to get a certificate. Garage implements this endpoints to tell if a given domain is handled by Garage or is garbage. + +Garage responds with the following logic: + - If the domain matches the pattern `<bucket-name>.<s3_api.root_domain>`, returns 200 OK + - If the domain matches the pattern `<bucket-name>.<s3_web.root_domain>` and website is configured for `<bucket>`, returns 200 OK + - If the domain matches the pattern `<bucket-name>` and website is configured for `<bucket>`, returns 200 OK + - Otherwise, returns 404 Not Found, 400 Bad Request or 5xx requests. + +*Note 1: because in the path-style URL mode, there is only one domain that is not known by Garage, hence it is not supported by this API endpoint. +You must manually declare the domain in your reverse-proxy. Idem for K2V.* + +*Note 2: buckets in a user's namespace are not supported yet by this endpoint. This is a limitation of this endpoint currently.* + +**Example:** Suppose a Garage instance configured with `s3_api.root_domain = .s3.garage.localhost` and `s3_web.root_domain = .web.garage.localhost`. + +With a private `media` bucket (name in the global namespace, website is disabled), the endpoint will feature the following behavior: + +``` +$ curl -so /dev/null -w "%{http_code}" http://localhost:3903/check?domain=media.s3.garage.localhost +200 +$ curl -so /dev/null -w "%{http_code}" http://localhost:3903/check?domain=media +400 +$ curl -so /dev/null -w "%{http_code}" http://localhost:3903/check?domain=media.web.garage.localhost +400 +``` + +With a public `example.com` bucket (name in the global namespace, website is activated), the endpoint will feature the following behavior: + +``` +$ curl -so /dev/null -w "%{http_code}" http://localhost:3903/check?domain=example.com.s3.garage.localhost +200 +$ curl -so /dev/null -w "%{http_code}" http://localhost:3903/check?domain=example.com +200 +$ curl -so /dev/null -w "%{http_code}" http://localhost:3903/check?domain=example.com.web.garage.localhost +200 +``` + + +**References:** + - [Using On-Demand TLS](https://caddyserver.com/docs/automatic-https#using-on-demand-tls) + - [Add option for a backend check to approve use of on-demand TLS](https://github.com/caddyserver/caddy/pull/1939) + - [Serving tens of thousands of domains over HTTPS with Caddy](https://caddy.community/t/serving-tens-of-thousands-of-domains-over-https-with-caddy/11179) ### Cluster operations |