wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.8.1-x86_64.rpm rpm --install elasticsearch-7.8.1-x86_64.rpm chown -R elasticsearch /var/lib/elasticsearch/ systemctl enable elasticsearch systemctl start elasticsearch 报错: Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x000000008a660000, 1973026816, 0) failed; error='Cannot allocate memory' (errno=12) # # There is insufficient memory for the Java Runtime Environment to continue. # Native memory allocation (mmap) failed to map 1973026816 bytes for committing reserved memory. # An error report file with more information is saved as: # /root/elasticsearch-5.6.0/hs_err_pid19703.log vi /etc/elasticsearch/jvm.options 或 vi config/jvm.options -Xms2g -Xmx2g 修改为: -Xms256m -Xmx256m ./bin/elasticsearch curl --proxy "" http://localhost:9200/?pretty 修改Elasticsearch的配置，使其支持外网访问: vi /etc/elasticsearch/elasticsearch.yml network.host: 0.0.0.0 node.name: node-1 cluster.initial_master_nodes: ["node-1"] 报错: Exception in thread "main" java.lang.RuntimeException: don't run elasticsearch as root 添加专门的用户 useradd elastic passwd elastic chown -R elastic:elastic elasticsearch-5.6.0/ 报错: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144] 修改/etc/sysctl.conf配置文件 cat /etc/sysctl.conf | grep vm.max_map_count vm.max_map_count=262144 如果不存在则添加 echo "vm.max_map_count=262144" >>/etc/sysctl.conf sysctl -p 报错: ERROR: [1] bootstrap checks failed [1]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_p... configured ERROR: Elasticsearch did not exit normally - check the logs at /var/log/elasticsearch/elasticsearch.log vi /etc/elasticsearch/elasticsearch.yml 取消注释保留一个节点 cluster.initial_master_nodes: ["node-1"]