Fastly-Force-Shield
Enable clustering.
Fastly reads this header from requests. It is proprietary to Fastly.
In most cases, Fastly will relay requests from the first server that handles the request to a second server that acts as the primary storage location for the resource being requested. This process is calledclustering. If a service configuration executes arestart during request or response processing, the clustering mechanism is automatically disabled. This header exists to re-enable it if desired.
vcl_recv { ... }
Fastly VCL
setreq.http.Fastly-Force-Shield="1";WARNING: Despite the name, this header has nothing to do withshielding.
