Here are the typical system indices found when using the Elastic Stack 7.6 (ES and Kibana are relevant here):
GET _cat/indices?h=i&s=i .apm-agent-configuration .kibana_1 .kibana_task_manager_1 .monitoring-alerts-7 .monitoring-es-7-2020.06.30 .monitoring-kibana-7-2020.06.30 .security-7 .triggered_watches .watcher-history-10-2020.06.30 .watches ilm-history-1-000001
I am wondering why ilm-history is not declared as a system index (which by convention start with a dot). For me, ilm-history feels very similar to .watcher-history for example. Am I missing something?