Does n8n queue mode support Redis Sentinel or only Redis Cluster?

Below is a summary of the current capabilities regarding Redis configuration in queue mode:

Redis Cluster vs. Sentinel in n8n Queue Mode

• Redis Cluster:
  n8n supports Redis Cluster mode. You can enable it by using the environment variable QUEUE_BULL_REDIS_CLUSTER_NODES, which expects a comma-separated list of Redis Cluster nodes in the format host:port. When this variable is set, n8n creates a Redis Cluster client and ignores QUEUE_BULL_REDIS_HOST and QUEUE_BULL_REDIS_PORT.

• Redis Sentinel:
  Currently, n8n does not offer native support or dedicated environment variables (such as settings for Sentinel or master name) for configuring Redis Sentinel in queue mode.

Recommendation

If you need high availability through clustering, using Redis Cluster mode with QUEUE_BULL_REDIS_CLUSTER_NODES is your option. If your infrastructure relies on Redis Sentinel, note that n8n does not provide built-in support for that configuration in queue mode at this time.