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Increase default upstream zone size for NGINX Plus #2009

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merged 2 commits into from
Sep 27, 2021

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pleshakov
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Proposed changes

NGINX Plus R25 allocates more memory for storing upstream server (peer) data: +720 bytes per peer. This means upstream server zones will use more memory to accommodate that data.

If a zone is full, NGINX Plus will fail to reload and fail to add more upstream servers via the API.

To prevent reload failures after an upgrade to R25, this commit increases the default upstream zone size for NGINX Plus from 256K to 512K.

@github-actions github-actions bot added the documentation Pull requests/issues for documentation label Sep 24, 2021
@pleshakov pleshakov force-pushed the change/increase-zone-size branch from d326cb2 to 1599a97 Compare September 24, 2021 18:01
@pleshakov pleshakov changed the title [WIP] Increase default upstream zone size for NGINX Plus Increase default upstream zone size for NGINX Plus Sep 25, 2021
@pleshakov pleshakov added the change Pull requests that introduce a change label Sep 25, 2021
@@ -318,7 +322,7 @@ def test_upstream_zone_size_0(self, cli_arguments, kube_apis,
if cli_arguments["ic-type"] == "nginx-plus-ingress":
print("Run assertions for Nginx Plus case")
assert "zone " in result_conf
assert " 256k;" in result_conf
assert " 512k;" in result_conf
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This is causing failures in the pipeline, although for some reason it is not showing up in the PR: https://gitlab.com/f5/nginx/kic/kubernetes-ingress/-/jobs/1623726013

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thanks for pointing out. forgot to update the template for N+ for Ingress, it still uses 256k default:

	zone {{$upstream.Name}} {{if ne $upstream.UpstreamZoneSize "0"}}{{$upstream.UpstreamZoneSize}}{{else}}256k{{end}};

NGINX Plus R25 allocates more memory for storing upstream server
(peer) data: +720 bytes per peer. This means upstream server
zones will use more memory to accommodate that data.

If a zone is full, NGINX Plus will fail to reload and fail to
add more upstream servers via the API.

To prevent reload failures after an upgrade to R25, this commit
increases the default upstream zone size for NGINX Plus from 256K
to 512K.
@pleshakov pleshakov force-pushed the change/increase-zone-size branch from 5628bd1 to 1a44c5a Compare September 27, 2021 20:10
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I don't think we need to have two different sizes for OSS and Plus (since it's just an increase of 256k) and the added logic that comes with it, but I'm approving the PR since it's time-sensitive.

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3 participants