Skip to content

hot_restart.rst: update outdated detailed information #17653

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
ggreenway merged 5 commits into from
Aug 12, 2021
Merged

hot_restart.rst: update outdated detailed information #17653

Changes from all commits
Commits
Show all changes
5 commits
Select commit Hold shift + click to select a range
190ef21
hot_restart.rst: update outdated detailed information
qinggniq Aug 10, 2021
ce97eae
update description
qinggniq Aug 11, 2021
e885248
break line
qinggniq Aug 11, 2021
4fb9507
fix rst format
qinggniq Aug 11, 2021
2275f5c
fix grammar error
qinggniq Aug 12, 2021
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
7 changes: 4 additions & 3 deletions docs/root/intro/arch_overview/operations/hot_restart.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -9,10 +9,11 @@ Envoy can fully reload itself (both code and configuration) without dropping exi
during the :ref:`drain process <arch_overview_draining>`. The hot restart functionality has the
following general architecture:

* Statistics and some locks are kept in a shared memory region. This means that gauges will be
consistent across both processes as restart is taking place.
* The two active processes communicate with each other over unix domain sockets using a basic RPC
protocol.
protocol. All counters are sent from the old process to the new process over the unix domain, and
gauges are transported except those marked with `NeverImport`. After hot restart is finished, the
gauges transported from the old process will be cleanup, but special gauge like
:ref:`server.hot_restart_generation statistic <server_statistics>` is retained.
* The new process fully initializes itself (loads the configuration, does an initial service
discovery and health checking phase, etc.) before it asks for copies of the listen sockets from
the old process. The new process starts listening and then tells the old process to start
Expand Down