我正在尝试运行ElasticSearchDocker 上的集群和 DigitalOcean 上的 CoreOS [stable]。为了让持久存储工作,我尝试了几乎所有的选项,但没有什么主意。
几乎每个 --volume 选项(-v /data/elasticsearch
,,-v $(pwd)/esdata:/data/elasticsearch
...)都会被忽略,并且在日志中会显示using [1] data paths, mounts [[/usr/share/elasticsearch/data (/dev/vda9)]]
。
仅在使用时-v /usr/share/elasticsearch/data:/data/elasticsearch
我收到一条错误消息,提示无法在只读文件系统上写入。
我究竟做错了什么?
完整的 elasticsearch.service 是:
[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 \
-v /data/elasticsearch \
--name %p-%i \
--net=host \
elasticsearch \
--node.name=%p-%i \
--cluster.name=mysearchcluster \
--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
答案1
在单个节点上运行时,ElasticSearch 不会将任何内容放入 /data/elasticsearch。当我部署多个节点时,就有数据了,而且似乎是持久的。最终的 .service 文件:
[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