Rodando em um único nó, o ElasticSearch não colocou nada em / data / elasticsearch. No momento em que implantei vários nós, havia dados e parece persistente. O arquivo final de serviço:
[Unit]
Description=ElasticSearch service
After=docker.service
Requires=docker.service
[Service]
TimeoutSec=180
EnvironmentFile=/etc/environment
ExecStartPre=/usr/bin/mkdir -p /data/elasticsearch
ExecStartPre=/usr/bin/docker pull elasticsearch
ExecStart=/bin/bash -c '\
curl -f ${COREOS_PRIVATE_IPV4}:4001/v2/keys/services/elasticsearch; \
if [ "$?" = "0" ]; then \
UNICAST_HOSTS=$(etcdctl ls --recursive /services/elasticsearch \
| sed "s/\/services\/elasticsearch\///g" \
| sed "s/$/:9300/" \
| paste -s -d","); \
else \
UNICAST_HOSTS=""; \
fi; \
/usr/bin/docker run \
--volume /data/elasticsearch:/usr/share/elasticsearch/data \
--name %p-%i \
--net=host \
elasticsearch \
--node.name=%p-%i \
--cluster.name=myescluster \
--network.publish_host=${COREOS_PRIVATE_IPV4} \
--discovery.zen.ping.multicast.enabled=false \
--discovery.zen.ping.unicast.hosts=$UNICAST_HOSTS'
ExecStop=/usr/bin/docker stop %p-%i
ExecStop=/usr/bin/docker rm %p-%i
[X-Fleet]
X-Conflicts=%p@*.service