Software /
code /
prosody-modules
Annotate
mod_graceful_shutdown/README.markdown @ 4445:e13eb0f851c8
mod_smacks: Explicitly request ack when leaving CSI-inactive mode
There may be a lot of unacked stanzas in the queue, might as well...
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Tue, 16 Feb 2021 22:49:44 +0100 |
parent | 2818:88474dd1af48 |
child | 4898:999e7cb7f6d9 |
rev | line source |
---|---|
2170
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
1 This module is an experiment about a more graceful shutdown process. |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
2 |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
3 Why |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
4 === |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
5 |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
6 When shutting down, a number of sessions, connections and other things |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
7 are teared down. Due to all these things happening very quickly, |
2818 | 8 sometimes e.g. client unavailable notifications don't make it to all |
2170
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
9 remote contacts because the server-to-server connections are teared down |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
10 just after. |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
11 |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
12 How |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
13 === |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
14 |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
15 This module works by breaking the shutdown process into separate steps |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
16 with a brief pause between them. |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
17 |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
18 It goes something like this |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
19 |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
20 1. Stop accepting new client connections. |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
21 2. Close all client connections. |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
22 3. Fire event for everything else. |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
23 4. Tell `net.server` to quit the main loop. |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
24 5. ??? |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
25 6. Still here? Kill itself. |
4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
26 |