啟動elasticsearch報錯

報錯資訊如下

[2020-06-21t17:19:49,618][info ][o.e.n.node               ] [xkxjzr3] starting ...
[2020-06-21t17:19:49,948][info ][o.e.t.transportservice ] [xkxjzr3] publish_address , bound_addresses 
[2020-06-21t17:19:49,978][info ][o.e.b.bootstrapchecks ] [xkxjzr3] bound or publishing to a non-loopback address, enforcing bootstrap checks
error: [2] bootstrap checks failed
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
[2]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
[2020-06-21t17:19:50,033][info ][o.e.n.node ] [xkxjzr3] stopping ...
[2020-06-21t17:19:50,103][info ][o.e.n.node ] [xkxjzr3] stopped
[2020-06-21t17:19:50,104][info ][o.e.n.node ] [xkxjzr3] closing ...
[2020-06-21t17:19:50,124][info ][o.e.n.node ] [xkxjzr3] closed

解決方案：

1、報錯 max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]是因為作業系統vm.max_map_count引數設定太小導致的，至於設定多大的數值，我這裡就直接參照報錯資訊的建議直接設定為262144

解決方案一：

切換到root使用者下，執行以下命令：

sysctl -w vm.max_map_count=262144

檢查配置是否生效

[root@localhost elasticsearch-6.1.2]# sysctl -a | grep "vm.max_map_count"

vm.max_map_count = 262144

[root@localhost elasticsearch-6.1.2]#

如果正常輸出262144，則說明修改成功，然後再次啟動elasticsearch，輸出如下：

[2018-01-29t00:24:36,619][info ][o.e.n.node               ] initialized
[2018-01-29t00:24:36,619][info ][o.e.n.node ] [qr5cyzh] starting ...
[2018-01-29t00:24:36,949][info ][o.e.t.transportservice ] [qr5cyzh] publish_address , bound_addresses 
[2018-01-29t00:24:37,015][info ][o.e.b.bootstrapchecks ] [qr5cyzh] bound or publishing to a non-loopback address, enforcing bootstrap checks
error: [1] bootstrap checks failed
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
[2018-01-29t00:24:37,038][info ][o.e.n.node ] [qr5cyzh] stopping ...
[2018-01-29t00:24:37,089][info ][o.e.n.node ] [qr5cyzh] stopped
[2018-01-29t00:24:37,089][info ][o.e.n.node ] [qr5cyzh] closing ...
[2018-01-29t00:24:37,128][info ][o.e.n.node ] [qr5cyzh] closed

這時候會發現只有乙個錯了，說明以上配置處理成功。

切換到root使用者，備份原有配置

[root@localhost elasticsearch-6.1.2]# cd /etc

[root@localhost etc]# cp sysctl.conf sysctl.conf.bak

編輯sysctl.conf，增加如下內容

[root@localhost etc]# vim sysctl.conf

# elasticsearch config start vm.max_map_count=262144

# elasticsearch config end

下面我們來解決另乙個問題

2、報錯max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]是因為作業系統安全檢測配置影響的，我們需要切換到root使用者下做如下配置：

先做乙個配置備份

[root@localhost elasticsearch-6.1.2]# cd /etc/security/

[root@localhost security]# cp limits.conf limits.conf.bak

然後編輯limits.conf增加如下配置：

# elasticsearch config start * soft nofile 65536 * hard nofile 131072 * soft nproc 2048 * hard nproc 4096

# elasticsearch config end

執行啟動命令 ./bin/elasticsearch ，會發現指定ip已經配置好了，也正常啟動。

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