elasticsearch5.* yum或者rpm部署 应该注意事项
1.yum 部署rpm --import https://artifacts.elastic.co/GPG-KEY-elasticsearch
cd /etc/yum.repos.d/
vim elasticsearch.repo
name=Elasticsearch repository for 5.x packages
baseurl=https://artifacts.elastic.co/packages/5.x/yum
gpgcheck=1
gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch
enabled=1
autorefresh=1
type=rpm-md
yum install elasticsearch -y
2.或者rpm部署的老司机（本质与方式一相同）
wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.2.1.rpm
sha1sum elasticsearch-5.2.1.rpm
rpm --install elasticsearch-5.2.1.rpm
3注意事项
3.1用户进程数扩大
#因为es集群中程序会启用大量线程，所以进程瓶颈不能太少了
sed -i 's#1024#2048#g' /etc/security/limits.d/90-nproc.conf
3.2设置进程能拥有的最多内存区域
#根据生产情况硬件调试
vim /etc/sysctl.conf
#插入参数
vm.max_map_count=262144
sysctl -p
3.3描述符调整
cat >> /etc/security/limits.conf
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