错误信息：
解决办法：
文件夹赋予用户权限

[root@chenxi elasticsearch]# chown -R eschenxi:esgroup /chenxi/software/elasticsearch #"/chenxi/software/elasticsearch" 为安装目录

错误信息：max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
ERROR: [1] bootstrap checks failed
[1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
ERROR: Elasticsearch did not exit normally - check the logs at /chenxi/software/elasticsearch/logs/elasticsearch.log

解决办法：
[root@chenxi elasticsearch]# vim /etc/sysctl.conf
在文件末尾追加：vm.max_map_count=655360
保存后执行

[root@chenxi elasticsearch]# sysctl -p

错误信息： [1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65535]
ERROR: [5] bootstrap checks failed
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65535]
[2]: max number of threads [1024] for user [es] is too low, increase to at least [4096]
[3]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
[4]:  failed to install; check the logs and fix your configuration or disable system call filters at your own risk
[5]: 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

解决办法：

[root@chenxi elasticsearch]# vim /etc/security/limits.conf

65535修改为65536

• soft nofile 65536

• hard nofile 65536

文件末尾追加

• soft nproc 4096

• hard nproc 4096

修改文件后保存并“关闭会话，重新登陆服务器”

错误信息：system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk
ERROR: [2] bootstrap checks failed
[1]: system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk
[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

解决办法：

在elasticsearch.yml修改并添加配置项

[root@chenxi elasticsearch]# vim config/elasticsearch.yml

----------------------------------- Memory -----------------------------------

#

Lock the memory on startup:

取消注释并设置值为false

bootstrap.memory_lock: false

追加配置项

bootstrap.system_call_filter: false

错误信息： the default discovery settings are unsuitable for production use; at least one of
ERROR: [1] bootstrap checks failed
[1]: 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

解决办法：

在elasticsearch.yml添加配置项

[root@chenxi elasticsearch]# vim config/elasticsearch.yml

--------------------------------- Discovery ----------------------------------

#

Pass an initial list of hosts to perform discovery when this node is started:

The default list of hosts is ["127.0.0.1", "[::1]"]

#

discovery.seed_hosts: ["host1", "host2"]

#

Bootstrap the cluster using an initial set of master-eligible nodes:

取消注释，并保留一个节点

cluster.initial_master_nodes: ["node-1"]

测试Es启动是否正常：

http://IP:9092

{
     "name" : "chenxi",
     "cluster_name" : "elasticsearch",
     "cluster_uuid" : "na",
     "version" : {
               "number" : "7.6.0",
                "build_flavor" : "default",
                "build_type" : "tar",
                "build_hash" : "7f634e9f44834fbc12724506cc1da681b0c3b1e3",
                "build_date" : "2020-02-06T00:09:00.449973Z",
                "build_snapshot" : false, "lucene_version" : "8.4.0",                                          "minimum_wire_compatibility_version" : "6.8.0",                                            "minimum_index_compatibility_version" : "6.0.0-beta1"
     },
     "tagline" : "You Know, for Search"

}