Exception in thread "main" java.nio.file.AccessDeniedException: /usr/local/elk/elasticsearch-7.8.0/config/elasticsearch.keystore
at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:90)
at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111)
at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:116)
at java.base/sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:219)
at java.base/java.nio.file.Files.newByteChannel(Files.java:375)
at java.base/java.nio.file.Files.newByteChannel(Files.java:426)
at org.apache.lucene.store.SimpleFSDirectory.openInput(SimpleFSDirectory.java:77)
at org.elasticsearch.common.settings.KeyStoreWrapper.load(KeyStoreWrapper.java:220)
at org.elasticsearch.common.settings.HasPasswordKeyStoreCommand.execute(HasPasswordKeyStoreCommand.java:42)
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86)
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:127)
at org.elasticsearch.cli.MultiCommand.execute(MultiCommand.java:91)
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:127)
at org.elasticsearch.cli.Command.main(Command.java:90)
at org.elasticsearch.common.settings.KeyStoreCli.main(KeyStoreCli.java:43)
[es@localhost elasticsearch-7.8.0]$ Exception in thread "main" org.elasticsearch.bootstrap.BootstrapException: java.nio.file.AccessDeniedException: /usr/local/elk/elasticsearch-7.8.0/config/elasticsearch.keystore
Likely root cause: java.nio.file.AccessDeniedException: /usr/local/elk/elasticsearch-7.8.0/config/elasticsearch.keystore
at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:90)
at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111)
at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:116)
at java.base/sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:219)
at java.base/java.nio.file.Files.newByteChannel(Files.java:375)
at java.base/java.nio.file.Files.newByteChannel(Files.java:426)
at org.apache.lucene.store.SimpleFSDirectory.openInput(SimpleFSDirectory.java:77)
at org.elasticsearch.common.settings.KeyStoreWrapper.load(KeyStoreWrapper.java:220)
at org.elasticsearch.bootstrap.Bootstrap.loadSecureSettings(Bootstrap.java:240)
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:349)
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:170)
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:161)
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86)
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:127)
at org.elasticsearch.cli.Command.main(Command.java:90)
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:126)
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92)
elasticsearch用户没有该文件夹的权限,执行命令
sudo chown -R 用户名:用户名 /usr/local/elasticsearch-6.4.0/
sudo chown -R 用户名:用户名 /usr/local/elasticsearch-6.4.0/
[es@localhost elasticsearch-7.8.0]$ ERROR: [3] bootstrap checks failed
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65535]
[2]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
[3]: 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
ERROR: Elasticsearch did not exit normally - check the logs at /usr/local/elk/elasticsearch-7.8.0/logs/elasticsearch.lo
sudo vi /etc/security/limits.conf
* soft nofile 65536
* hard nofile 65536
vm.max_map_count = 65530
现象
ES启动时异常
bin/elasticsearch
[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
原因分析
看提示可知：缺少默认配置，至少需要配置discovery.seed_hosts/discovery.seed_providers/cluster.initial_master_nodes中的一个参数.
discovery.seed_hosts: 集群主机列表
discovery.seed_providers: 基于配置文件配置集群主机列表
cluster.initial_master_nodes: 启动时初始化的参与选主的node，生产环境必填
处理办法
修改配置文件，添加参数即可
vim config/elasticsearch.yml
#添加配置
discovery.seed_hosts: ["127.0.0.1"]
cluster.initial_master_nodes: ["node-1"]