Elastic Cloud on Kubernetes 1.9.1

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Enhancements

• Add log4j2.formatMsgNoLookups logging property to ES < 7.2 #5157

This change will mitigate the Log4Shell vulnerability (CVE-2021-44228) in susceptible Elasticsearch clusters (below version 7.2). ECK will prepend the -Dlog4j2.formatMsgNoLookups=true JVM parameter to the environment variable ES_JAVA_OPTS if it is not yet defined by the user. This triggers a rolling restart of all Pods of the affected Elasticsearch clusters to apply these changes.

• Add internal product header to requests #5129

Bug fixes

• Resource aggregator should handle missing memory settings #5158

Misc

• Update golang Docker tag to v1.17.5 #5149