elasticsearch官网建议生产环境需要设置bootstrap.memory_lock: true
重新启动elasticsearch，报错信息如下：
[baoshan@test-43.dev.rokid-inc.com /home/baoshan/elk/elasticsearch-5.3.0]
$bin/elasticsearch
[2017-04-20T21:45:36,741][WARN ][o.e.b.JNANatives ] Unable to lock JVM Memory: error=12, reason=无法分配内存
[2017-04-20T21:45:36,746][WARN ][o.e.b.JNANatives ] This can result in part of the JVM being swapped out.
[2017-04-20T21:45:36,746][WARN ][o.e.b.JNANatives ] Increase RLIMIT_MEMLOCK, soft limit: 65536, hard limit: 65536
[2017-04-20T21:45:36,747][WARN ][o.e.b.JNANatives ] These can be adjusted by modifying /etc/security/limits.conf, for example:
# allow user 'baoshan' mlockall
baoshan soft memlock unlimited
baoshan hard memlock unlimited
[2017-04-20T21:45:36,747][WARN ][o.e.b.JNANatives ] If you are logged in interactively, you will have to re-login for the new limits to take effect.
[2017-04-20T21:45:37,057][INFO ][o.e.n.Node ] [node-43] initializing ...
[2017-04-20T21:45:37,584][INFO ][o.e.e.NodeEnvironment ] [node-43] using [1] data paths, mounts [[/ (/dev/mapper/vg_root-lv_root)]], net usable_space [39.6gb], net total_space [44.7gb], spins? [possibly], types [ext4]
[2017-04-20T21:45:37,585][INFO ][o.e.e.NodeEnvironment ] [node-43] heap size [1.9gb], compressed ordinary object pointers [unknown]
[2017-04-20T21:45:37,587][INFO ][o.e.n.Node ] [node-43] node name [node-43], node ID [oUSfip81Sc-SGtZP9GCydg]
[2017-04-20T21:45:37,588][INFO ][o.e.n.Node ] [node-43] version[5.3.0], pid[5150], build[3adb13b/2017-03-23T03:31:50.652Z], OS[Linux/2.6.32-504.el6.x86_64/i386], JVM[Oracle Corporation/Java HotSpot(TM) Server VM/1.8.0_121/25.121-b13]
[2017-04-20T21:45:39,914][INFO ][o.e.p.PluginsService ] [node-43] loaded module [aggs-matrix-stats]
[2017-04-20T21:45:39,915][INFO ][o.e.p.PluginsService ] [node-43] loaded module [ingest-common]
[2017-04-20T21:45:39,916][INFO ][o.e.p.PluginsService ] [node-43] loaded module [lang-expression]
[2017-04-20T21:45:39,916][INFO ][o.e.p.PluginsService ] [node-43] loaded module [lang-groovy]
[2017-04-20T21:45:39,916][INFO ][o.e.p.PluginsService ] [node-43] loaded module [lang-mustache]
[2017-04-20T21:45:39,916][INFO ][o.e.p.PluginsService ] [node-43] loaded module [lang-painless]
[2017-04-20T21:45:39,917][INFO ][o.e.p.PluginsService ] [node-43] loaded module [percolator]
[2017-04-20T21:45:39,917][INFO ][o.e.p.PluginsService ] [node-43] loaded module [reindex]
[2017-04-20T21:45:39,917][INFO ][o.e.p.PluginsService ] [node-43] loaded module [transport-netty3]
[2017-04-20T21:45:39,917][INFO ][o.e.p.PluginsService ] [node-43] loaded module [transport-netty4]
[2017-04-20T21:45:39,919][INFO ][o.e.p.PluginsService ] [node-43] no plugins loaded
[2017-04-20T21:45:42,143][INFO ][o.e.n.Node ] [node-43] initialized
[2017-04-20T21:45:42,150][INFO ][o.e.n.Node ] [node-43] starting ...
[2017-04-20T21:45:42,282][WARN ][i.n.u.i.MacAddressUtil ] Failed to find a usable hardware address from the network interfaces; using random bytes: 5b:5f:0c:d6:78:e5:0b:ec
[2017-04-20T21:45:42,381][INFO ][o.e.t.TransportService ] [node-43] publish_address {10.88.128.88:9300}, bound_addresses {10.88.128.88:9300}
[2017-04-20T21:45:42,395][INFO ][o.e.b.BootstrapChecks ] [node-43] bound or publishing to a non-loopback or non-link-local address, enforcing bootstrap checks
ERROR: bootstrap checks failed
memory locking requested for elasticsearch process but memory is not locked
[2017-04-20T21:45:42,430][INFO ][o.e.n.Node ] [node-43] stopping ...
[2017-04-20T21:45:42,500][INFO ][o.e.n.Node ] [node-43] stopped
[2017-04-20T21:45:42,500][INFO ][o.e.n.Node ] [node-43] closing ...
[2017-04-20T21:45:42,525][INFO ][o.e.n.Node ] [node-43] closed
解决办法如下：
需要修改
/etc/security/limits.conf
baoshan soft memlock unlimited
baoshan hard memlock unlimited
修改：
/etc/sysctl.conf
vm.swappiness=0
之后重启机器
再次启动elasticsearch，成功，信息如下：
[baoshan@test-43.dev.rokid-inc.com /home/baoshan/elk/elasticsearch-5.3.0]
$bin/elasticsearch
[2017-04-20T21:49:34,755][INFO ][o.e.n.Node ] [node-43] initializing ...
[2017-04-20T21:49:35,168][INFO ][o.e.e.NodeEnvironment ] [node-43] using [1] data paths, mounts [[/ (/dev/mapper/vg_root-lv_root)]], net usable_space [39.6gb], net total_space [44.7gb], spins? [possibly], types [ext4]
[2017-04-20T21:49:35,170][INFO ][o.e.e.NodeEnvironment ] [node-43] heap size [1.9gb], compressed ordinary object pointers [unknown]
[2017-04-20T21:49:35,176][INFO ][o.e.n.Node ] [node-43] node name [node-43], node ID [oUSfip81Sc-SGtZP9GCydg]
[2017-04-20T21:49:35,178][INFO ][o.e.n.Node ] [node-43] version[5.3.0], pid[1208], build[3adb13b/2017-03-23T03:31:50.652Z], OS[Linux/2.6.32-504.el6.x86_64/i386], JVM[Oracle Corporation/Java HotSpot(TM) Server VM/1.8.0_121/25.121-b13]
[2017-04-20T21:49:38,647][INFO ][o.e.p.PluginsService ] [node-43] loaded module [aggs-matrix-stats]
[2017-04-20T21:49:38,647][INFO ][o.e.p.PluginsService ] [node-43] loaded module [ingest-common]
[2017-04-20T21:49:38,647][INFO ][o.e.p.PluginsService ] [node-43] loaded module [lang-expression]
[2017-04-20T21:49:38,648][INFO ][o.e.p.PluginsService ] [node-43] loaded module [lang-groovy]
[2017-04-20T21:49:38,648][INFO ][o.e.p.PluginsService ] [node-43] loaded module [lang-mustache]
[2017-04-20T21:49:38,648][INFO ][o.e.p.PluginsService ] [node-43] loaded module [lang-painless]
[2017-04-20T21:49:38,649][INFO ][o.e.p.PluginsService ] [node-43] loaded module [percolator]
[2017-04-20T21:49:38,650][INFO ][o.e.p.PluginsService ] [node-43] loaded module [reindex]
[2017-04-20T21:49:38,650][INFO ][o.e.p.PluginsService ] [node-43] loaded module [transport-netty3]
[2017-04-20T21:49:38,650][INFO ][o.e.p.PluginsService ] [node-43] loaded module [transport-netty4]
[2017-04-20T21:49:38,652][INFO ][o.e.p.PluginsService ] [node-43] no plugins loaded
[2017-04-20T21:49:43,478][INFO ][o.e.n.Node ] [node-43] initialized
[2017-04-20T21:49:43,478][INFO ][o.e.n.Node ] [node-43] starting ...
[2017-04-20T21:49:43,650][WARN ][i.n.u.i.MacAddressUtil ] Failed to find a usable hardware address from the network interfaces; using random bytes: 5d:dc:90:e8:b1:e1:50:72
[2017-04-20T21:49:43,858][INFO ][o.e.t.TransportService ] [node-43] publish_address {10.88.128.88:9300}, bound_addresses {10.88.128.88:9300}
[2017-04-20T21:49:43,872][INFO ][o.e.b.BootstrapChecks ] [node-43] bound or publishing to a non-loopback or non-link-local address, enforcing bootstrap checks
[2017-04-20T21:50:13,896][WARN ][o.e.n.Node ] [node-43] timed out while waiting for initial discovery state - timeout: 30s
[2017-04-20T21:50:13,935][INFO ][o.e.h.n.Netty4HttpServerTransport] [node-43] publish_address {10.88.128.88:9200}, bound_addresses {10.88.128.88:9200}
[2017-04-20T21:50:13,950][INFO ][o.e.n.Node ] [node-43] started
OK,搞定！