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## Setup on host nodes, e.g. machines running openshift
# See: https://www.elastic.co/guide/en/elasticsearch/reference/current/docker.html#docker-cli-run-prod-mode
# and: https://www.elastic.co/guide/en/elasticsearch/reference/current/_maximum_map_count_check.html

$ grep vm.max_map_count /etc/sysctl.conf
vm.max_map_count=262144
# During runtime 
sysctl -w vm.max_map_count=262144

## Environment properties and their defaults:

# memory used by elasticsearch
ENV ES_JAVA_OPTS "-Xms512m -Xmx512m"

# cluster name
ENV CLUSTER_NAME=elasticsearch5-openshift

# Minimum number of master nodes when forming a cluster or updating cluster state.
Always set this number to a number more than half of the number of nodes. E.g. if you have 3 nodes, set it to 2.
See https://www.elastic.co/guide/en/elasticsearch/reference/current/important-settings.html#minimum_master_nodes for details
ENV NUMBER_OF_MASTERS=1

# Network interface to bind to
ENV NETWORK_HOST=0.0.0.0

# Publish host address. An elasticsearch node will publish this address in discovery responses, e.g. /_cat/nodes, /_cat/master, etc. 
ENV PUBLISH_HOST=

# List of node addresses in cluster for zen discovery
ENV UNICAST_HOSTS "127.0.0.1, [::1]"