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Cache refresh fix #381

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merged 4 commits into from
Dec 13, 2021
Merged

Cache refresh fix #381

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37bf565
Changes for shaping traffic to api server
gizmo-rt Dec 12, 2021
084f806
Added delay for cache refresh
gizmo-rt Dec 13, 2021
b50ec09
updated variable name and removed redundant conversion
gizmo-rt Dec 13, 2021
fcbd3d8
Updated cache refresh delay variable name
gizmo-rt Dec 13, 2021
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1 change: 1 addition & 0 deletions fluent-plugin-enhance-k8s-metadata/lib/fluent/plugin/filter_enhance_k8s_metadata.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,7 @@ class EnhanceK8sMetadataFilter < Fluent::Plugin::Filter
config_param :cache_ttl, :integer, default: 60 * 60 * 2
config_param :cache_refresh, :integer, default: 60 * 60
config_param :cache_refresh_variation, :integer, default: 60 * 15
config_param :cache_refresh_apiserver_request_delay, :float, default: Float::NAN

def configure(conf)
super
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4 changes: 4 additions & 0 deletions fluent-plugin-enhance-k8s-metadata/lib/sumologic/kubernetes/cache_strategy.rb
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Expand Up @@ -27,6 +27,10 @@ def refresh_cache
entries.each { |key, _|
begin
refresh_cache_entry(key)
# Adding friction to avoid aggressive refresh.
if !@cache_refresh_apiserver_request_delay.nan? && !@cache_refresh_apiserver_request_delay.negative?
sleep @cache_refresh_apiserver_request_delay
end
rescue => e
log.error "Cannot refresh metadata for key #{key}: #{e}"
end
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