elasticsearch集群搭建
操作系统:Centos7.7
Elasticsearch版本:7.5.1
JDK:Openjdk-1.8
1、安装jdk
yum install java-1.8.0-openjdk.x86_64 -y
2、下载Elasticsearch:
https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.5.1-linux-x86_64.tar.gz
3、安装Elasticsearch
tar -zxvf elasticsearch-7.5.1-linux-x86_64.tar.gz mv elasticsearch-7.5.1 /opt #创建数据存放路径 mkdir /opt/elasticsearch-7.5.1/data #建立用户并授权(es不能用root运行) useradd es chown -R es:es /opt/elasticsearch-7.5.1
修改配置文件 vim /opt/elasticsearch-7.5.1/config/elasticsearch.yml
# ======================== Elasticsearch Configuration =========================
#
# NOTE: Elasticsearch comes with reasonable defaults for most settings.
# Before you set out to tweak and tune the configuration, make sure you
# understand what are you trying to accomplish and the consequences.
#
# The primary way of configuring a node is via this file. This template lists
# the most important settings you may want to configure for a production cluster.
#
# Please consult the documentation for further information on configuration options:
# https://www.elastic.co/guide/en/elasticsearch/reference/index.html
#
# ---------------------------------- Cluster -----------------------------------
#
# Use a descriptive name for your cluster:
#
cluster.name: zhaiwu-cluster
#
# ------------------------------------ Node ------------------------------------
#
# Use a descriptive name for the node:
#
node.name: es01 (此处需要更改)
node.master: true
node.data: true
#
# Add custom attributes to the node:
#
#node.attr.rack: r1
#
# ----------------------------------- Paths ------------------------------------
#
# Path to directory where to store the data (separate multiple locations by comma):
#
path.data: /opt/elasticsearch-7.5.1/data
#
# Path to log files:
#
path.logs: /opt/elasticsearch-7.5.1/logs
#
# ----------------------------------- Memory -----------------------------------
#
# Lock the memory on startup:
#
bootstrap.memory_lock: true
#
# Make sure that the heap size is set to about half the memory available
# on the system and that the owner of the process is allowed to use this
# limit.
#
# Elasticsearch performs poorly when the system is swapping the memory.
#
# ---------------------------------- Network -----------------------------------
#
# Set the bind address to a specific IP (IPv4 or IPv6):
#
network.host: 0.0.0.0
#
# Set a custom port for HTTP:
#
http.port: 9200
#
# For more information, consult the network module documentation.
#
# --------------------------------- Discovery ----------------------------------
#
# Pass an initial list of hosts to perform discovery when this node is started:
# The default list of hosts is ["127.0.0.1", "[::1]"]
#
discovery.seed_hosts: ["172.16.0.143", "172.16.0.144","172.16.0.145"]
discovery.zen.minimum_master_nodes: 2
#
# Bootstrap the cluster using an initial set of master-eligible nodes:
#
cluster.initial_master_nodes: ["es01","es02","es03"]
#
# For more information, consult the discovery and cluster formation module documentation.
#
# ---------------------------------- Gateway -----------------------------------
#
# Block initial recovery after a full cluster restart until N nodes are started:
#
gateway.recover_after_nodes: 2
#
# For more information, consult the gateway module documentation.
#
# ---------------------------------- Various -----------------------------------
#
# Require explicit names when deleting indices:
#
#action.destructive_requires_name: true
http.cors.enabled: true
http.cors.allow-origin: "*"
调整jvm内存 jvm.options
-Xms4g
-Xmx4g
调整系统配置
vim /etc/security/limits.conf * soft nofile 65536 * hard nofile 65536 * soft nproc 2048 * hard nproc 4096 #我选择锁住swapping因此需要在这个配置文件下再增加两行代码 es soft memlock unlimited es hard memlock unlimited vim /etc/sysctl.conf vm.max_map_count=655360 fs.file-max=655360
#启用配置
sysctl -p
切换到es用户(切记),启动elasticsearch
/opt/elasticsearch-7.5.1/bin/elasticsearch -d
查看节点信息
#查看服务信息 [es@es01 elasticsearch-7.5.1]$ curl es01:9200 { "name" : "es01", "cluster_name" : "zhaiwu-cluster", "cluster_uuid" : "7f4vs0cVSDShm_WxPTYxng", "version" : { "number" : "7.5.1", "build_flavor" : "default", "build_type" : "tar", "build_hash" : "3ae9ac9a93c95bd0cdc054951cf95d88e1e18d96", "build_date" : "2019-12-16T22:57:37.835892Z", "build_snapshot" : false, "lucene_version" : "8.3.0", "minimum_wire_compatibility_version" : "6.8.0", "minimum_index_compatibility_version" : "6.0.0-beta1" }, "tagline" : "You Know, for Search" } #查看节点信息 [es@es01 elasticsearch-7.5.1]$ curl es01:9200/_cat/nodes 172.16.0.145 6 68 0 0.00 0.05 0.06 dilm - es03 172.16.0.143 9 74 0 0.00 0.07 0.09 dilm - es01 172.16.0.144 9 67 0 0.00 0.10 0.11 dilm * es02
参数说明
cluster.name: elasticsearch 配置es的集群名称,默认是elasticsearch,es会自动发现在同一网段下的es,如果在同一网段下有多个集群,就可以用这个属性来区分不同的集群。 node.name: “node1.cn” 节点名,默认随机指定一个name列表中名字,该列表在es的jar包中config文件夹里name.txt文件中,其中有很多作者添加的有趣名字。 node.master: true 指定该节点是否有资格被选举成为node,默认是true,es是默认集群中的第一台机器为master,如果这台机挂了就会重新选举master。 node.data: true 指定该节点是否存储索引数据,默认为true。 index.number_of_shards: 5 设置默认索引分片个数,默认为5片。 index.number_of_replicas: 1 设置默认索引副本个数,默认为1个副本。 path.conf: /path/to/conf 设置配置文件的存储路径,默认是es根目录下的config文件夹。 path.data: /path/to/data 设置索引数据的存储路径,默认是es根目录下的data文件夹,可以设置多个存储路径,用逗号隔开,例: path.data: /path/to/data1,/path/to/data2 path.work: /path/to/work 设置临时文件的存储路径,默认是es根目录下的work文件夹。 path.logs: /path/to/logs 设置日志文件的存储路径,默认是es根目录下的logs文件夹 path.plugins: /path/to/plugins 设置插件的存放路径,默认是es根目录下的plugins文件夹 bootstrap.mlockall: true 设置为true来锁住内存。因为当jvm开始swapping时es的效率 会降低,所以要保证它不swap,可以把ES_MIN_MEM和ES_MAX_MEM两个环境变量设置成同一个值,并且保证机器有足够的内存分配给es。 同时也要允许elasticsearch的进程可以锁住内存,linux下可以通过ulimit -l unlimited命令。 network.bind_host: 192.168.0.1 设置绑定的ip地址,可以是ipv4或ipv6的,默认为0.0.0.0。 network.publish_host: 192.168.0.1 设置其它节点和该节点交互的ip地址,如果不设置它会自动判断,值必须是个真实的ip地址。 network.host: 192.168.0.1 这个参数是用来同时设置bind_host和publish_host上面两个参数。 transport.tcp.port: 9300 设置节点间交互的tcp端口,默认是9300。 transport.tcp.compress: true 设置是否压缩tcp传输时的数据,默认为false,不压缩。 http.port: 9200 设置对外服务的http端口,默认为9200。 http.max_content_length: 100mb 设置内容的最大容量,默认100mb http.enabled: false 是否使用http协议对外提供服务,默认为true,开启。 gateway.type: local gateway的类型,默认为local即为本地文件系统,可以设置为本地文件系统,分布式文件系统,hadoop的HDFS,和amazon的s3服务器,其它文件系统的设置方法下次再详细说。 gateway.recover_after_nodes: 1 设置集群中N个节点启动时进行数据恢复,默认为1。 gateway.recover_after_time: 5m 设置初始化数据恢复进程的超时时间,默认是5分钟。 gateway.expected_nodes: 2 设置这个集群中节点的数量,默认为2,一旦这N个节点启动,就会立即进行数据恢复。 cluster.routing.allocation.node_initial_primaries_recoveries: 4 初始化数据恢复时,并发恢复线程的个数,默认为4。 cluster.routing.allocation.node_concurrent_recoveries: 2 添加删除节点或负载均衡时并发恢复线程的个数,默认为4。 indices.recovery.max_size_per_sec: 0 设置数据恢复时限制的带宽,如入100mb,默认为0,即无限制。 indices.recovery.concurrent_streams: 5 设置这个参数来限制从其它分片恢复数据时最大同时打开并发流的个数,默认为5。 discovery.zen.minimum_master_nodes: 1 设置这个参数来保证集群中的节点可以知道其它N个有master资格的节点。默认为1,对于大的集群来说,可以设置大一点的值(2-4) discovery.zen.ping.timeout: 3s 设置集群中自动发现其它节点时ping连接超时时间,默认为3秒,对于比较差的网络环境可以高点的值来防止自动发现时出错。 discovery.zen.ping.multicast.enabled: false 设置是否打开多播发现节点,默认是true。 discovery.zen.ping.unicast.hosts: [“host1”, “host2:port”, “host3[portX-portY]”] 设置集群中master节点的初始列表,可以通过这些节点来自动发现新加入集群的节点。 下面是一些查询时的慢日志参数设置 index.search.slowlog.level: TRACE index.search.slowlog.threshold.query.warn: 10s index.search.slowlog.threshold.query.info: 5s index.search.slowlog.threshold.query.debug: 2s index.search.slowlog.threshold.query.trace: 500ms index.search.slowlog.threshold.fetch.warn: 1s index.search.slowlog.threshold.fetch.info: 800ms index.search.slowlog.threshold.fetch.debug:500ms index.search.slowlog.threshold.fetch.trace: 200ms
后续kibana部署:https://www.cnblogs.com/hope123/p/12159770.html