本文将使用Docker
容器(使用docker-compose
编排)快速部署Elasticsearch 集群
,可用于开发环境(单机多实例)或生产环境部署。
注意,6.x
版本已经不能通过 -Epath.config
参数去指定配置文件的加载位置,文档说明:
For the archive distributions, the config directory location defaults to$ES_HOME/config
. The location of the >config directorycan be changed
via theES_PATH_CONF
environment variable as follows:
ES_PATH_CONF=/path/to/my/config ./bin/elasticsearch
Alternatively, you can export the ES_PATH_CONF environment variable via the command line or via your shell profile.
即交给环境变量 ES_PATH_CONF
来设定了(官方文档),单机部署多个实例且不使用容器的同学多多注意。
准备工作
安装 docker
& docker-compose
这里推进使用 daocloud 做个加速安装:
#docker curl -sSL https://get.daocloud.io/docker | sh #docker-compose curl -L https://get.daocloud.io/docker/compose/releases/download/1.23.2/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose chmod +x /usr/local/bin/docker-compose #查看安装结果 docker-compose -v
数据目录
#创建数据/日志目录 这里我们部署3个节点 mkdir /opt/elasticsearch/data/{node0,nod1,node2} -p mkdir /opt/elasticsearch/logs/{node0,nod1,node2} -p cd /opt/elasticsearch #权限我也很懵逼啦 给了 privileged 也不行 索性0777好了 chmod 0777 data/* -R && chmod 0777 logs/* -R #防止JVM报错 echo vm.max_map_count=262144 /etc/sysctl.conf sysctl -p
docker-compse 编排服务
创建编排文件
vim docker-compose.yml
参数说明
- cluster.name=elasticsearch-cluster
集群名称
- node.name=node0
- node.master=true
- node.data=true
节点名称、是否可作为主节点、是否存储数据
- bootstrap.memory_lock=true
锁定进程的物理内存地址避免交换(swapped)来提高性能
- http.cors.enabled=true
- http.cors.allow-origin=*
开启cors以便使用Head插件
- "ES_JAVA_OPTS=-Xms512m -Xmx512m"
JVM内存大小配置
- "discovery.zen.ping.unicast.hosts=elasticsearch_n0,elasticsearch_n1,elasticsearch_n2"
- "discovery.zen.minimum_master_nodes=2"
由于5.2.1
后的版本是不支持多播的,所以需要手动指定集群各节点的tcp
数据交互地址,用于集群的节点发现
和failover
,默认缺省9300
端口,如设定了其它端口需另行指定,这里我们直接借助容器通信,也可以将各节点的9300
映射至宿主机,通过网络端口通信。
设定failover
选取的quorum = nodes/2 + 1
当然,也可以挂载自己的配置文件,ES
镜像的配置文件是/usr/share/elasticsearch/config/elasticsearch.yml
,挂载如下:
volumes: - path/to/local/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml:ro
docker-compose.yml
version: '3' services: elasticsearch_n0: image: elasticsearch:6.6.2 container_name: elasticsearch_n0 privileged: true environment: - cluster.name=elasticsearch-cluster - node.name=node0 - node.master=true - node.data=true - bootstrap.memory_lock=true - http.cors.enabled=true - http.cors.allow-origin=* - "ES_JAVA_OPTS=-Xms512m -Xmx512m" - "discovery.zen.ping.unicast.hosts=elasticsearch_n0,elasticsearch_n1,elasticsearch_n2" - "discovery.zen.minimum_master_nodes=2" ulimits: memlock: soft: -1 hard: -1 volumes: - ./data/node0:/usr/share/elasticsearch/data - ./logs/node0:/usr/share/elasticsearch/logs ports: - 9200:9200 elasticsearch_n1: image: elasticsearch:6.6.2 container_name: elasticsearch_n1 privileged: true environment: - cluster.name=elasticsearch-cluster - node.name=node1 - node.master=true - node.data=true - bootstrap.memory_lock=true - http.cors.enabled=true - http.cors.allow-origin=* - "ES_JAVA_OPTS=-Xms512m -Xmx512m" - "discovery.zen.ping.unicast.hosts=elasticsearch_n0,elasticsearch_n1,elasticsearch_n2" - "discovery.zen.minimum_master_nodes=2" ulimits: memlock: soft: -1 hard: -1 volumes: - ./data/node1:/usr/share/elasticsearch/data - ./logs/node1:/usr/share/elasticsearch/logs ports: - 9201:9200 elasticsearch_n2: image: elasticsearch:6.6.2 container_name: elasticsearch_n2 privileged: true environment: - cluster.name=elasticsearch-cluster - node.name=node2 - node.master=true - node.data=true - bootstrap.memory_lock=true - http.cors.enabled=true - http.cors.allow-origin=* - "ES_JAVA_OPTS=-Xms512m -Xmx512m" - "discovery.zen.ping.unicast.hosts=elasticsearch_n0,elasticsearch_n1,elasticsearch_n2" - "discovery.zen.minimum_master_nodes=2" ulimits: memlock: soft: -1 hard: -1 volumes: - ./data/node2:/usr/share/elasticsearch/data - ./logs/node2:/usr/share/elasticsearch/logs ports: - 9202:9200
这里我们分别为node0/node1/node2
开放宿主机的9200/9201/9202
作为http服务端口
,各实例的tcp数据传输
用默认的9300
通过容器管理通信。
如果需要多机部署,则将ES
的transport.tcp.port: 9300
端口映射至宿主机xxxx
端口,discovery.zen.ping.unicast.hosts
填写各主机代理的地址即可:
#比如其中一台宿主机为192.168.1.100 ... - "discovery.zen.ping.unicast.hosts=192.168.1.100:9300,192.168.1.101:9300,192.168.1.102:9300" ... ports: ... - 9300:9300
创建并启动服务
[root@localhost elasticsearch]# docker-compose up -d [root@localhost elasticsearch]# docker-compose ps Name Command State Ports -------------------------------------------------------------------------------------------- elasticsearch_n0 /usr/local/bin/docker-entr ... Up 0.0.0.0:9200->9200/tcp, 9300/tcp elasticsearch_n1 /usr/local/bin/docker-entr ... Up 0.0.0.0:9201->9200/tcp, 9300/tcp elasticsearch_n2 /usr/local/bin/docker-entr ... Up 0.0.0.0:9202->9200/tcp, 9300/tcp #启动失败查看错误 [root@localhost elasticsearch]# docker-compose logs #最多是一些访问权限/JVM vm.max_map_count 的设置问题
查看集群状态
192.168.20.6 是我的服务器地址
访问 验证 Failover 通过集群接口查看状态 模拟主节点下线,集群开始选举新的主节点,并对数据进行迁移,重新分片。 集群状态(注意换个http端口 原主节点下线了),down掉的节点还在集群中,等待一段时间仍未恢复后就会被剔出 等待一段时间 恢复节点 node0 等待一段时间 配合 Head 插件观察 集群状态图示更容易看出数据自动迁移的过程 1、集群正常 数据安全分布在3个节点上 2、下线 node1 主节点 集群开始迁移数据 迁移中 迁移完成 3、恢复 node1 节点 问题小记 elasticsearch watermark 部署完后创建索引发现有些分片处于 Unsigned 状态,是由于 elasticsearch watermark:low,high,flood_stage的限定造成的,默认硬盘使用率高于 以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。http://192.168.20.6:9200/_cat/nodes"htmlcode">
ip heap.percent ram.percent cpu load_1m load_5m load_15m node.role master name
172.25.0.3 36 98 79 3.43 0.88 0.54 mdi * node0
172.25.0.2 48 98 79 3.43 0.88 0.54 mdi - node2
172.25.0.4 42 98 51 3.43 0.88 0.54 mdi - node1
[root@localhost elasticsearch]# docker-compose stop elasticsearch_n0
Stopping elasticsearch_n0 ... done
ip heap.percent ram.percent cpu load_1m load_5m load_15m node.role master name
172.25.0.2 57 84 5 0.46 0.65 0.50 mdi - node2
172.25.0.4 49 84 5 0.46 0.65 0.50 mdi * node1
172.25.0.3 mdi - node0
ip heap.percent ram.percent cpu load_1m load_5m load_15m node.role master name
172.25.0.2 44 84 1 0.10 0.33 0.40 mdi - node2
172.25.0.4 34 84 1 0.10 0.33 0.40 mdi * node1
[root@localhost elasticsearch]# docker-compose start elasticsearch_n0
Starting elasticsearch_n0 ... done
ip heap.percent ram.percent cpu load_1m load_5m load_15m node.role master name
172.25.0.2 52 98 25 0.67 0.43 0.43 mdi - node2
172.25.0.4 43 98 25 0.67 0.43 0.43 mdi * node1
172.25.0.3 40 98 46 0.67 0.43 0.43 mdi - node0
git clone git://github.com/mobz/elasticsearch-head.git
cd elasticsearch-head
npm install
npm run start
85%
就会告警,开发嘛,手动关掉好了,数据会分片到各节点,生产自行决断。
curl -X PUT http://192.168.20.6:9201/_cluster/settings -H 'Content-type':'application/json' -d '{"transient":{"cluster.routing.allocation.disk.threshold_enabled": false}}'