下载并安装公钥
sudo rpm --import https://artifacts.elastic.co/GPG-KEY-elasticsearch
设置源
cat > /etc/yum.repos.d/logstash.repo <<EOF
[logstash-7.x]
name=Elastic repository for 7.x packages
baseurl=https://artifacts.elastic.co/packages/7.x/yum
gpgcheck=1
gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticse...