7.8.1 Release

[jmlrt]

This PR prepare 7.8 branch for 7.8.1 release:

• bump chart and Docker images version from 7.8.1-SNAPSHOT to 7.8.1
• remove notices on README that this is a development branch and development branch specific install instructions

Note

• remove notices on README that this is a development branch and development branch specific install instructions

This is required because released Helm charts will be packaged from this PR commit including the README files that will be available inside the chart packages and in Helm Hub pages (example: Elasticsearch chart page).

This change will be reverted in the next PR after release when we will bump 7.8 branch to 7.8.2-SNAPSHOT version.

[jmlrt]

• 7.8.1 as the default stack version
• Some documentation fixes and improvements in #678 and #679 (@ArthurFritz), #690 (@fatmcgav)
• Some improvements in CI tests jobs in #687 (@jmlrt) , #715 and #708 (@fatmcgav)

APM Server

PR	Author	Title
#686	@jim-barber-he	Add ServiceAccount annotations

Elasticsearch

PR	Author	Title
#655	@mephinet	podSecurityContext.runAsUser needs to be nulled as well for Openshift
#686	@jim-barber-he	Add ServiceAccount annotations
#665	@desaintmartin	Set PVC labels through setting all StatefulSet labels to its volumeClaimTemplate
#670	@xario	Update elasticsearch.endpoints to use elasticsearch.uname
#727	@fhaase2	Update test image pull policy

Filebeat

PR	Author	Title
#686	@jim-barber-he	Add ServiceAccount annotations
#704	@bmilescu	Add permission to list nodes
#699	@jmlrt	Document probe workaround for Kafka output

Kibana

PR	Author	Title
#726	@debojitkakoti	Add loadbalancerIP to Service spec

Logstash

PR	Author	Title
#686	@jim-barber-he	Add ServiceAccount annotations
#695	@jmlrt	Add headless service for StatefulSet
#712	@kksudo	Support creating secrets
#723	@kksudo	Restart pod when the secrets have changed

Metricbeat

PR	Author	Title
#686	@jim-barber-he	Add ServiceAccount annotations support
#713	@kernkonzentrat	Add DaemonSet and Deployment annotation support
#716	@erihanse	Make DaemonSet and Deployment optional
#387	@SergK	Make kube-state-metrics optional