下载elasticsearch、kibana,elasticsearch与kibana版本必须一致
https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.5.0-linux-x86_64.tar.gz
https://artifacts.elastic.co/downloads/kibana/kibana-7.5.0-linux-x86_64.tar.gz
接下来就是解压安装:
安装elasticsearch:
1、直接tar -xvzf 解压即可
2、修改配置
#vim /usr/local/elasticsearch-7.5.0/config/elasticsearch.yml
cluster.initial_master_nodes: ["node-1"]
network.host: 0.0.0.0
gateway.recover_after_nodes: 1 # 只要指定数量的节点加入集群,就开始进行恢复;默认是3,现在只有一台机器,所以改为1
#vim /usr/local/elasticsearch-7.5.0/config/jvm.options
-Xms512m
-Xmx512m
3、创建启动用户,并启动
elasticsearch新版本安全策略提升,不允许使用root用户启动
groupadd elasticsearch
useradd elasticsearch -g elasticsearch
chown -R elasticsearch:elasticsearch elasticsearch-7.5.0/*
su elasticsearch
./elasticsearch &
![](https://img.laitimes.com/img/_0nNw4CM6IyYiwiM6ICdiwiI0gTMx81dsQWZ4lmZf1GLlpXazVmcvwVZnFWbp1zczV2YvJHctM3cv1Ces0zaHRGcWdUYuVzVa9GczoVdG1mWfVGc5RHLwIzX39GZhh2csATMflHLwEzX4xSZz91ZsAzMfRHLGZkRGZkRfJ3bs92YskmNhVTYykVNQJVMRhXVEF1X0hXZ0xCNx8VZ6l2cssmch1mclRXY39CXldWYtlWPzNXZj9mcw1ycz9WL49zZuBnLihjZxYmNjZ2MkRGO0MmM2MDNxIGMmNmN4EzM5ADM5YzYkRDN5QzLcVDMyIDMy8CXzV2Zh1WavwVbvNmLvR3YxUjLyM3Lc9CX6MHc0RHaiojIsJye.png)
报错总结:
1、内存不足
Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00000000ca660000, 899284992, 0) failed; error='Cannot allocate memory' (errno=12)
清理一下内存,重新配置-Xms512m 和-Xmx512m,只是测试无须太大内存,默认是1g,改成512,甚至256m也行
2、Caused by: java.lang.RuntimeException: can not run elasticsearch as root
elastic 新版本后,安全策略提升,不允许使用root用户启动
创建elastic启动用户
3、future versions of Elasticsearch will require Java 11; your Java version from [/usr/local/java/jdk1.8.0_333/jre] does not meet this requirement
elastic需要 java11版本的jdk,系统安装了jdk 1.8,并且配置了JAVA_HOME环境变量
elastic 7.2后,自带了jdk,不需要另外安装,如果指定了JAVA_HOME则会使用自己配置的
jdk
4、ERROR: [2] bootstrap checks failed
[1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
[2]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured
第一个报错:elasticsearch用户拥有的内存权限太小,至少需要262144
临时修改
切换到root用户
执行命令:
sysctl -w vm.max_map_count=262144
永久修改
在/etc/sysctl.conf文件最后添加一行
vm.max_map_count=262144
第二个报错:elasticsearch配置中必须配置[discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] 三者中的一个,这里配置了:
cluster.initial_master_nodes: ["node-1"]
kibana安装:
1、tar解压
2、配置
#vim /usr/local/kibana-7.5.0/config/kibana.yml
server.port: 5601
server.host: "0.0.0.0"
server.name: "yrq"
elasticsearch.hosts: ["http://localhost:9200/"] # elastic的地址
3、kibana默认也不能使用root启动
但是,可以带参数,运行root启动
Kibana should not be run as root. Use --allow-root to continue.
创建启动用户
useradd kibana -g elasticsearch
chown -R kibana:elasticsearch kibana-7.5.0/
su kibana
./kibana &
报错总结:
1、License information could not be obtained from Elasticsearch for the [data] cluster. Error: No Living connections
[warning][migrations] Unable to connect to Elasticsearch. Error: No Living connections
[warning][admin][elasticsearch] Unable to revive connection: http://localhost:9200/
连接不上elasticsearch:
排除法:
1、是否网络策略限制
2、防火墙、selinux是否关闭
3、iptables规则
4、kibana指定elastisearch是否正确
最后几点都排除了,发现是elasticsearch有个配置没配,gateway.recover_after_nodes: 1,需要将这个字段配置为1