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hot-reload of pipeline configs without restarting logstash pods

See original GitHub issue

Describe the feature:

https://www.elastic.co/guide/en/logstash/current/reloading-config.html

Describe a specific use case for the feature:

Starting logstash can be slow. Hot-reloading config files should help when updating logstash pipelines via helm values.

Seems to me it’s just a matter of adding --config.reload.automatic and removing/disabling this code in logstash/templates/statefulset.yaml

{{/* This forces a restart if the configmap has changed */}}
{{- if .Values.logstashConfig }}
configchecksum: {{ include (print .Template.BasePath "/configmap-config.yaml") . | sha256sum | trunc 63 }}
{{- end }}
{{/* This forces a restart if the configmap has changed */}}
{{- if .Values.logstashPipeline }}
pipelinechecksum: {{ include (print .Template.BasePath "/configmap-pipeline.yaml") . | sha256sum | trunc 63 }}
{{- end }}

Or is restart preferred for any reason?

Issue Analytics

State:
Created 4 years ago
Comments:20 (7 by maintainers)

Top GitHub Comments

2reactions

liladlercommented, Mar 8, 2021

Since secrets are automatically reloaded without restarting the pods, what worked for me is to configure Logstash with a stringData Secret while setting config.reload.automatic: true in logstash.yml

0reactions

cchrisocommented, Jun 30, 2022

still valid

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