Other systems keep two things apart: draining before a shutdown (ephemeral, cleared by the restart: RabbitMQ drain, CockroachDB node drain) and an operator's maintenance flag (persistent cluster state: Kubernetes cordon, Nomad eligibility, Consul maint). This PR is the former, so it is named that way: Server.Drain (synchronous again; the on/off API is gone until the persistent maintenance flag exists), Cluster.SetDraining/Draining, the read-only phase flag readOnly, /v1/ready reports "draining": true, error 50301 says the node is shutting down, and docs/config.md has a "Draining on shutdown" section. A drain duration of 0 now closes all streams at once instead of disabling the drain.
A node draining before a shutdown is in maintenance mode: /v1/ready reports "maintenance": true (was "draining"), and the 503 says the node is in maintenance mode. Maintenance is a runtime state next to the configured role, not a role: a later admin command can enter and leave it without a shutdown, with the same semantics. server_drain.go is now server_maintenance.go.
On SIGTERM, an active cluster node with another healthy active node first drains: new subscriptions (HTTP streams and WebSockets) get 503, which a load balancer retries on another node, /v1/ready fails with "draining": true, and the open streams are closed evenly over experimental-cluster-drain-duration (default 1m, fits systemd's 90s stop timeout; 0 disables). Clients reconnect a few at a time and resume with since=, instead of all at once. Publishes and polls are still served, since a load balancer does not retry a POST. A second signal skips the rest of the drain.
A stream registry on the server tracks open subscriber connections once each, however many topics they subscribe to.
- Use new notification request/opt-in flow for push
- Implement unsubscribing
- Implement muting
- Implement emojis in title
- Add iOS specific PWA warning
- Don’t use websockets when web push is enabled
- Fix duplicate notifications
- Implement default web push setting
- Implement changing subscription type
- Implement web push subscription refresh
- Implement web push notification click
binwiederhier
Bee mines
Hunter Kehoe
binwiederhier
nimbleghost
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