Allow specifying queue prefix (#2107)

Author: svix-jplatte

server/svix-server/src/cfg.rs

@@ -185,6 +185,11 @@ pub struct ConfigurationInner {
     /// The DSN for the Redis-backed queue. Overrides `redis_dsn`. (can be left empty if not using
     /// redis)
     pub queue_dsn: Option<String>,
+    /// Optional prefix to use for the queue.
+    ///
+    /// Allows multiple instances of svix-server to share a single queue backend
+    /// without interfering with each other.
+    pub queue_prefix: Option<String>,
 
     /// What kind of cache to use. Supported: memory, redis (must have redis_dsn or cache_dsn
     /// configured), none.

server/svix-server/src/lib.rs

@@ -101,7 +101,7 @@ async fn graceful_shutdown_handler() {
 
 pub async fn run(cfg: Configuration) {
     let _metrics = setup_metrics(&cfg);
-    run_with_prefix(None, cfg, None).await
+    run_with_prefix(cfg.queue_prefix.clone(), cfg, None).await
 }
 
 #[derive(Clone)]