docker启动elasticsearch时内存不足问题及解决方法

docker启动elasticsearch时内存不足问题及解决方法

本文主要介绍docker启动elasticsearch时内存不足的问题。本文为大家分享安装流程和解决方案，对你的学习或工作有一定的参考价值。有需要的朋友可以参考一下。

问题

Docker在安装和启动elasticsearch时内存不足。

Centos8(阿里云ecs服务器)

[root@iZ2zeczvvb79boy368xppwZ~]#cat/etc/redhat-release CentOSLinuxrelease8.1.1911(Core)

安装过程

dockerpullelasticsearch:6.4.0

修改虚拟机内存(看似无效)

sysctl-wvm.max_map_count=262144

使用dockerrun命令运行容器。

dockerrun-p9200:9200-p9300:9300--nameelasticsearch\ -e"discovery.type=single-node"\ -e"cluster.name=elasticsearch"\ -v/mydata/elasticsearch/plugins:/usr/share/elasticsearch/plugins\ -v/mydata/elasticsearch/data:/usr/share/elasticsearch/data\ -delasticsearch:6.4.0

dockerps查看容器未启动。

[root@iZ2zeczvvb79boy368xppwZ~]#dockerps CONTAINERIDIMAGECOMMANDCREATEDSTATUSPORTSNAMES edfc400862ebrabbitmq:3.7.15"docker-entrypoint.s…"14hoursagoUp14hours0.0.0.0:4369->4369/tcp,0.0.0.0:5671-5672->5671-5672/tcp,0.0.0.0:15671-15672->15671-15672/tcp,0.0.0.0:25672->25672/tcprabbitmq 2ae2f3f8dc1fnginx:1.10"nginx-g'daemonof…"2weeksagoUp2weeks0.0.0.0:80->80/tcp,443/tcpnginx 164e4e7561dfredis:3.2"docker-entrypoint.s…"2weeksagoUp2weeks0.0.0.0:6379->6379/tcpredis eeabe57f1f21mysql:5.7"docker-entrypoint.s…"2weeksagoUp2weeks0.0.0.0:3306->3306/tcp,33060/tcpmysql

检查容器确实被创建了

[root@iZ2zeczvvb79boy368xppwZ~]#dockerps-a CONTAINERIDIMAGECOMMANDCREATEDSTATUSPORTSNAMES 767829ae1d7celasticsearch:6.4.0"/usr/local/bin/dock…"AboutaminuteagoExited(1)Aboutaminuteagoelasticsearch edfc400862ebrabbitmq:3.7.15"docker-entrypoint.s…"14hoursagoUp14hours0.0.0.0:4369->4369/tcp,0.0.0.0:5671-5672->5671-5672/tcp,0.0.0.0:15671-15672->15671-15672/tcp,0.0.0.0:25672->25672/tcprabbitmq 2ae2f3f8dc1fnginx:1.10"nginx-g'daemonof…"2weeksagoUp2weeks0.0.0.0:80->80/tcp,443/tcpnginx 164e4e7561dfredis:3.2"docker-entrypoint.s…"2weeksagoUp2weeks0.0.0.0:6379->6379/tcpredis eeabe57f1f21mysql:5.7"docker-entrypoint.s…"2weeksagoUp2weeks0.0.0.0:3306->3306/tcp,33060/tcpmysql

检查日志dockerlogs-fd性搜索命令检查日志，发现jvm内存不足。

[root@iZ2zeczvvb79boy368xppwZ~]#dockerlogs-felasticsearch OpenJDK64-BitServerVMwarning:OptionUseConcMarkSweepGCwasdeprecatedinversion9.0andwilllikelyberemovedinafuturerelease. OpenJDK64-BitServerVMwarning:INFO:os::commit_memory(0x00007ebf15330000,549668585472,0)failed;error='Notenoughspace'(errno=12) # #ThereisinsufficientmemoryfortheJavaRuntimeEnvironmenttocontinue. #Nativememoryallocation(mmap)failedtomap549668585472bytesforcommittingreservedmemory. #Anerrorreportfilewithmoreinformationissavedas: #logs/hs_err_pid1.log

解决方法

修改jvm.options文件配置
首先找到jvm.options文件的位置(每个服务器的位置可能不一样)。

[root@iZ2zeczvvb79boy368xppwZ~]#find/-namejvm.options /var/lib/docker/overlay2/d399872a3517b4d4acb0d2f70d0625c0f38251ffe5819a1cea00f8213de3e7f5/diff/usr/share/elasticsearch/config/jvm.options

Vim进入该文件来修改虚拟机的最小内存

[root@iZ2zeczvvb79boy368xppwZ~]#vim/var/lib/docker/overlay2/d399872a3517b4d4acb0d2f70d0625c0f38251ffe5819a1cea00f8213de3e7f5/diff/usr/share/elasticsearch/config/jvm.options

找到-Xms属性，修改为512m(我的elasticsearch:6.4.0默认为1g)

##JVMconfiguration ################################################################ ##IMPORTANT:JVMheapsize ################################################################ ## ##YoushouldalwayssettheminandmaxJVMheap ##sizetothesamevalue.Forexample,toset ##theheapto4GB,set: ## ##-Xms4g ##-Xmx4g ## ##Seehttps://www.elastic.co/guide/en/elasticsearch/reference/current/heap-size.html ##formoreinformation ## ################################################################ #Xmsrepresentstheinitialsizeoftotalheapspace #Xmxrepresentsthemaximumsizeoftotalheapspace -Xms512m -Xmx512m

保存并退出

在vim中，按I进入编辑模式，按ESC退出编辑模式，按:进入命令模式，然后输入W保存，Q退出，Q！强行退出。
再次启动容器，dockerps检查容器启动成功。

[root@iZ2zeczvvb79boy368xppwZ~]#dockerps CONTAINERIDIMAGECOMMANDCREATEDSTATUSPORTSNAMES f5c4ed61196belasticsearch:6.4.0"/usr/local/bin/dock…"15minutesagoUp15minutes0.0.0.0:9200->9200/tcp,0.0.0.0:9300->9300/tcpelasticsearch edfc400862ebrabbitmq:3.7.15"docker-entrypoint.s…"15hoursagoUp15hours0.0.0.0:4369->4369/tcp,0.0.0.0:5671-5672->5671-5672/tcp,0.0.0.0:15671-15672->15671-15672/tcp,0.0.0.0:25672->25672/tcprabbitmq 2ae2f3f8dc1fnginx:1.10"nginx-g'daemonof…"2weeksagoUp2weeks0.0.0.0:80->80/tcp,443/tcpnginx 164e4e7561dfredis:3.2"docker-entrypoint.s…"2weeksagoUp2weeks0.0.0.0:6379->6379/tcpredis eeabe57f1f21mysql:5.7"docker-entrypoint.s…"2weeksagoUp2weeks0.0.0.0:3306->3306/tcp,33060/tcpmysql

摘要[/s2/]

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