elasticsearch启动不起来，错误码78解决办法

elasticsearch启动不起来，错误码78解决办法

Problem:
You want to run ElasticSearch using docker, but the container immediately stops again using this error message

elasticsearch exited with code 78
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or

elasticsearch2 exited with code 78
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Solution:
If you look through the entire log message, you’ll find lines like

elasticsearch     | [1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
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解决：

切换到root用户

执行命令：

sysctl -w vm.max_map_count=262144
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查看结果：

sysctl -a|grep vm.max_map_count
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显示：

vm.max_map_count = 262144
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上述方法修改之后，如果重启虚拟机将失效，所以：

解决办法：

在 /etc/sysctl.conf文件最后添加一行

vm.max_map_count=262144
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即可永久修改