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elk7.5.0 之 elasticsearch7.5.0 集群部署

时间:2020-01-03 11:37来源:csdn.net 作者:csdn
搭建最新版本的elasticsearch7.5 集群
环境
服务器 配置 服务 系统 es版本
10.100.12.144 16G 8core 500G磁盘 node.master/node.data CentOS 7.4 es7.5
10.100.12.145 16G 8core 500G磁盘 node.master/node.data CentOS 7.4 es7.5
10.100.12.146 16G 8core 500G磁盘 node.master/node.data CentOS 7.4 es7.5
10.100.12.147 16G 8core 500G磁盘 node.data CentOS 7.4 es7.5
10.100.12.148 16G 8core 500G磁盘 node.data CentOS 7.4 es7.5
服务器基础优化
文件句柄
Linux中,每个进程默认打开的最大文件句柄数是1000,对于服务器进程来说,显然太小,通过修改/etc/security/limits.conf来增大打开最大句柄数和/etc/security/limits.d/20-nproc.conf 配置

$ vi /etc/security/limits.conf
* soft nproc 1024000
* hard nproc 1024000
$ vi /etc/security/limits.d/20-nproc.conf
*      soft    nproc    65535

内核优化
$ cat  /etc/sysctl.conf
#CTCDN系统优化参数
#关闭ipv6
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
#决定检查过期多久邻居条目
net.ipv4.neigh.default.gc_stale_time=120
#使用arp_announce / arp_ignore解决ARP映射问题
net.ipv4.conf.default.arp_announce = 2
net.ipv4.conf.all.arp_announce=2
net.ipv4.conf.lo.arp_announce=2
# 避免放大攻击
net.ipv4.icmp_echo_ignore_broadcasts = 1
# 开启恶意icmp错误消息保护
net.ipv4.icmp_ignore_bogus_error_responses = 1
#关闭路由转发
net.ipv4.ip_forward = 0
net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.default.send_redirects = 0
#开启反向路径过滤
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.default.rp_filter = 1
#处理无源路由的包
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.default.accept_source_route = 0
#关闭sysrq功能
kernel.sysrq = 0
#core文件名中添加pid作为扩展名
kernel.core_uses_pid = 1
# 开启SYN洪水攻击保护
net.ipv4.tcp_syncookies = 1
#修改消息队列长度
kernel.msgmnb = 65536
kernel.msgmax = 65536
#设置最大内存共享段大小bytes
kernel.shmmax = 68719476736
kernel.shmall = 4294967296
#timewait的数量,默认180000
net.ipv4.tcp_max_tw_buckets = 6000
net.ipv4.tcp_sack = 1
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_rmem = 4096        87380   4194304
net.ipv4.tcp_wmem = 4096        16384   4194304
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
#每个网络接口接收数据包的速率比内核处理这些包的速率快时,允许送到队列的数据包的最大数目
net.core.netdev_max_backlog = 262144
#限制仅仅是为了防止简单的DoS 攻击
net.ipv4.tcp_max_orphans = 3276800
#未收到客户端确认信息的连接请求的最大值
net.ipv4.tcp_max_syn_backlog = 262144
net.ipv4.tcp_timestamps = 0
#内核放弃建立连接之前发送SYNACK 包的数量
net.ipv4.tcp_synack_retries = 1
#内核放弃建立连接之前发送SYN 包的数量
net.ipv4.tcp_syn_retries = 1
#启用timewait 快速回收
net.ipv4.tcp_tw_recycle = 1
#开启重用。允许将TIME-WAIT sockets 重新用于新的TCP 连接
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_mem = 94500000 915000000 927000000
net.ipv4.tcp_fin_timeout = 1
#当keepalive 起用的时候,TCP 发送keepalive 消息的频度。缺省是2 小时
net.ipv4.tcp_keepalive_time = 1800
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.tcp_keepalive_intvl = 15
#允许系统打开的端口范围
net.ipv4.ip_local_port_range = 1024    65000
#修改防火墙表大小,默认65536
net.netfilter.nf_conntrack_max=655350
net.netfilter.nf_conntrack_tcp_timeout_established=1200
# 确保无人能修改路由表
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.default.accept_redirects = 0
net.ipv4.conf.all.secure_redirects = 0
net.ipv4.conf.default.secure_redirects = 0
fs.nr_open = 10000000
fs.file-max = 11000000

安装es
下载软件
$ cd /usr/local/src
$ wget  https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.5.0-x86_64.rpm
$ wget  https://artifacts.elastic.co/downloads/kibana/kibana-7.5.0-x86_64.rpm
## JDK建议13版本
$ https://www.oracle.com/technetwork/java/javase/downloads/jdk13-downloads-5672538.html

分发软件到其他机器
$ for i in 10.100.12.145 10.100.12.146 10.100.12.147 10.100.12.148 ;do scp /usr/local/src/jdk-13.0.1_linux-x64_bin.rpm $i:/usr/local/src/ ;done
$ for i in 10.100.12.145 10.100.12.146 10.100.12.147 10.100.12.148 ;do scp /usr/local/src/elasticsearch-7.5.0-x86_64.rpm  $i:/usr/local/src/ ;done

安装jdk和es
各个节点安装

$ yum localinstall -y /usr/local/src/jdk-13.0.1_linux-x64_bin.rpm
$ yum localinstall -y /usr/local/src/elasticsearch-7.5.0-x86_64.rpm

验证jdk

$ java -version
java version "13.0.1" 2019-10-15
Java(TM) SE Runtime Environment (build 13.0.1+9)
Java HotSpot(TM) 64-Bit Server VM (build 13.0.1+9, mixed mode, sharing)

配置es (使用SSL)

## master节点生成证书
$ mkdir -p/usr/share/elasticsearch/certs/
$ cd /usr/share/elasticsearch/certs/
$ ./bin/elasticsearch-certutil ca
## 保存elastic-stack-ca.p12路径并输入密码(123456)
$./bin/elasticsearch-certutil cert --ca elastic-stack-ca.p12

保存elastic-certificates.p12路径并输入密码(123456)
将elastic-stack-ca.p12 拷贝到各个节点的/etc/elasticsearch/下(必须在此目录下的任意一层目录)

$ for i in 10.100.12.145 10.100.12.146 10.100.12.147 10.100.12.148 ;do scp /usr/share/elasticsearch/certs/elastic-certificates.p12  $i:/etc/elasticsearch/;done

配置用户密码

$./bin/elasticsearch-setup-passwords interactive

elasticsearch.yml中增加配置

$ egrep -v '^#' /etc/elasticsearch/elasticsearch.yml
xpack.security.enabled: true
xpack.security.transport.ssl.enabled: true
xpack.security.transport.ssl.verification_mode: certificate
xpack.security.transport.ssl.keystore.path: /etc/elasticsearch/elastic-certificates.p12 
xpack.security.transport.ssl.truststore.path: /etc/elasticsearch/elastic-certificates.p12

所有elasticsearch节点将密码添加至elasticsearch-keystore(密码123456)

$ bin/elasticsearch-keystore add xpack.security.transport.ssl.keystore.secure_password
$ bin/elasticsearch-keystore add xpack.security.transport.ssl.truststore.secure_password

最终3个master节点配置如下(3个节点不同在于node.name)

cluster.name: cluster-7.5.0
node.name: node-1
node.master: true
node.data: true
path.data: /home/work/elasticsearch/data
path.logs: /home/work/elasticsearch/logs
http.port: 9200
network.host: 0.0.0.0

discovery.seed_hosts: ["10.100.12.144", "10.100.12.145", "10.100.12.146"]
cluster.initial_master_nodes: ["10.100.12.144"]
discovery.zen.minimum_master_nodes: 2
discovery.zen.ping_timeout: 60s # 心跳超时时间
discovery.zen.fd.ping_interval: 120s     # 节点检测时间
discovery.zen.fd.ping_timeout: 120s     #ping 超时时间
discovery.zen.fd.ping_retries: 3     # 心跳重试次数

gateway.recover_after_nodes: 4
gateway.recover_after_time: 10m
gateway.expected_nodes: 5
bootstrap.system_call_filter: false
http.cors.enabled: true
http.cors.allow-origin: "*"

xpack.security.enabled: true
xpack.security.transport.ssl.enabled: true
xpack.security.transport.ssl.verification_mode: certificate
xpack.security.transport.ssl.keystore.path: /etc/elasticsearch/elastic-certificates.p12 
xpack.security.transport.ssl.truststore.path: /etc/elasticsearch/elastic-certificates.p12

2个数据节点(因为是数据节点不参与选举master,去掉node.master: true配置项,注意更改node.name)

$ egrep -v '^#' /etc/elasticsearch/elasticsearch.yml  
cluster.name: cluster-7.5.0
node.name: node-4 ##注意更改
node.data: true
path.data: /home/work/elasticsearch/data
path.logs: /home/work/elasticsearch/logs
http.port: 9200
network.host: 0.0.0.0
discovery.seed_hosts: ["10.100.12.144", "10.100.12.145", "10.100.12.146"]
cluster.initial_master_nodes: ["10.100.12.144"]
discovery.zen.minimum_master_nodes: 2
discovery.zen.ping_timeout: 60s # 心跳超时时间
discovery.zen.fd.ping_interval: 120s     # 节点检测时间
discovery.zen.fd.ping_timeout: 120s     #ping 超时时间
discovery.zen.fd.ping_retries: 3     # 心跳重试次数
gateway.recover_after_nodes: 4
gateway.recover_after_time: 10m
gateway.expected_nodes: 5
bootstrap.system_call_filter: false
http.cors.enabled: true
http.cors.allow-origin: "*"

xpack.security.enabled: true ## 开启x-pack
xpack.security.transport.ssl.enabled: true
xpack.security.transport.ssl.verification_mode: certificate
xpack.security.transport.ssl.keystore.path: /etc/elasticsearch/elastic-certificates.p12 
xpack.security.transport.ssl.truststore.path: /etc/elasticsearch/elastic-certificates.p12

启动es不可使用root权限,需创建普通用户,安装es时候系统已经默认新增了elasticsearch组和用户,但是 是nologin的,还需要手动创建普通用户。

##创建数据目录
# mkdir mkdir /home/work/elasticsearch/{data,logs} -p
## 创建普通账户
# useradd elastic -G elasticsearch
# echo elastic |passwd elastic --stdin
## 授权
# chown -R elasticsearch:elasticsearch /usr/share/elasticsearch/
# chown -R elasticsearch:elasticsearch /etc/elasticsearch/
# chown -R elasticsearch:elasticsearch /home/work/elasticsearch/

所有节点启动es

$ systemctl enable elasticsearch.service
$ systemctl start elasticsearch.service

稍等一会 选举出master

$ curl  --user elastic:xx 'localhost:9200/_cat/master?v'
id                     host          ip            node
pMpl1On4TAmRlxUjm6IKcA 10.100.12.145 10.100.12.145 node-2
$ curl --user elastic:xx 'localhost:9200/_cat/nodes?v'
ip            heap.percent ram.percent cpu load_1m load_5m load_15m node.role master name
10.100.12.147           49          98  14    1.39    1.53     1.31 dilm      -      node-4
10.100.12.144           66          98  20    3.26    2.19     1.69 dilm      -      node-1
10.100.12.146           38          98  11    2.83    2.06     1.71 dilm      -      node-3
10.100.12.148           29          98  18    1.27    1.23     1.23 dilm      -      node-5
10.100.12.145           68          98  23    2.11    2.22     2.06 dilm      *      node-2

通过以上步骤es集群安装完成。
es7版本已经自带x-pack,无需自行安装,通过配置xpack.security.enabled: true 来开启x-pack ,kibana来展示x-pack安全组件,下一章节安装kibana。

(责任编辑:IT)
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