尝试在 Openshift 上运行 Elastic Search 6.2.4，但它没有运行，容器以代码 137 退出。
[2018-06-01T14:24:58,148][INFO ][o.e.p.PluginsService ] [jge060C]
loaded module [ingest-common]
[2018-06-01T14:24:58,149][INFO ][o.e.p.PluginsService ] [jge060C] loaded module [lang-expression]
[2018-06-01T14:24:58,149][INFO ][o.e.p.PluginsService ] [jge060C] loaded module [lang-mustache]
[2018-06-01T14:24:58,149][INFO ][o.e.p.PluginsService ] [jge060C] loaded module [lang-painless]
[2018-06-01T14:24:58,149][INFO ][o.e.p.PluginsService ] [jge060C] loaded module [mapper-extras]
[2018-06-01T14:24:58,149][INFO ][o.e.p.PluginsService ] [jge060C] loaded module [parent-join]
[2018-06-01T14:24:58,149][INFO ][o.e.p.PluginsService ] [jge060C] loaded module [percolator]
[2018-06-01T14:24:58,149][INFO ][o.e.p.PluginsService ] [jge060C] loaded module [rank-eval]
[2018-06-01T14:24:58,149][INFO ][o.e.p.PluginsService ] [jge060C] loaded module [reindex]
[2018-06-01T14:24:58,149][INFO ][o.e.p.PluginsService ] [jge060C] loaded module [repository-url]
[2018-06-01T14:24:58,149][INFO ][o.e.p.PluginsService ] [jge060C] loaded module [transport-netty4]
[2018-06-01T14:24:58,149][INFO ][o.e.p.PluginsService ] [jge060C] loaded module [tribe]
[2018-06-01T14:24:58,150][INFO ][o.e.p.PluginsService ] [jge060C] loaded plugin [ingest-geoip]
[2018-06-01T14:24:58,150][INFO ][o.e.p.PluginsService ] [jge060C] loaded plugin [ingest-user-agent]
[2018-06-01T14:24:58,150][INFO ][o.e.p.PluginsService ] [jge060C] loaded plugin [x-pack-core]
[2018-06-01T14:24:58,150][INFO ][o.e.p.PluginsService ] [jge060C] loaded plugin [x-pack-deprecation]
[2018-06-01T14:24:58,151][INFO ][o.e.p.PluginsService ] [jge060C] loaded plugin [x-pack-graph]
[2018-06-01T14:24:58,151][INFO ][o.e.p.PluginsService ] [jge060C] loaded plugin [x-pack-logstash]
[2018-06-01T14:24:58,151][INFO ][o.e.p.PluginsService ] [jge060C] loaded plugin [x-pack-ml]
[2018-06-01T14:24:58,151][INFO ][o.e.p.PluginsService ] [jge060C] loaded plugin [x-pack-monitoring]
[2018-06-01T14:24:58,151][INFO ][o.e.p.PluginsService ] [jge060C] loaded plugin [x-pack-security]
[2018-06-01T14:24:58,151][INFO ][o.e.p.PluginsService ] [jge060C] loaded plugin [x-pack-upgrade]
[2018-06-01T14:24:58,151][INFO ][o.e.p.PluginsService ] [jge060C] loaded plugin [x-pack-watcher]
[2018-06-01T14:25:01,592][INFO ][o.e.x.m.j.p.l.CppLogMessageHandler] [controller/131] [Main.cc@128] controller (64 bit): Version 6.2.4 (Build 524e7fe231abc1) Copyright (c) 2018 Elasticsearch BV
[2018-06-01T14:25:03,271][INFO ][o.e.d.DiscoveryModule ] [jge060C] using discovery type [zen]
[2018-06-01T14:25:04,305][INFO ][o.e.n.Node ] initialized
[2018-06-01T14:25:04,305][INFO ][o.e.n.Node ] [jge060C] starting ...
[2018-06-01T14:25:04,497][INFO ][o.e.t.TransportService ] [jge060C] publish_address {10.131.3.134:9300}, bound_addresses {[::]:9300}
[2018-06-01T14:25:04,520][INFO ][o.e.b.BootstrapChecks ] [jge060C] bound or publishing to a non-loopback address, enforcing bootstrap checks
ERROR: [1] bootstrap checks failed
[1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
[2018-06-01T14:25:04,531][INFO ][o.e.n.Node ] [jge060C] stopping ...
[2018-06-01T14:25:04,623][INFO ][o.e.n.Node ] [jge060C] stopped
[2018-06-01T14:25:04,624][INFO ][o.e.n.Node ] [jge060C] closing ...
[2018-06-01T14:25:04,634][INFO ][o.e.n.Node ] [jge060C] closed
从日志中可以看到，必须增加 vm 最大堆大小。事实证明它是一个内核参数，如何为运行 ES 的 pod 更改它？
内核命令行参数不能按 pod 更改，但vm.max_map_count参数可以通过 sysctl 更改。
请参阅这两个类似的SO问题以获取解决方案：
- 如何将"sysctl"标志从 k8s 传递给 docker？
- 为容器启用net.ipv4.ip_forward
在 sysctl 的官方 Kubernetes 文档中还有一个更通用的解释。
您不能更改单个 pod 的内核参数;它们必须在底层操作系统中修复。