docker启动elasticsearch时内存不足问题及解决方法

问题

docker安装并启动elasticsearch时内存不足

系统centos8（阿里云ecs服务器）

[root@iZ2zeczvvb79boy368xppwZ ~]# cat /etc/redhat-release

CentOS Linux release 8.1.1911 (Core)安装过程

docker pull elasticsearch:6.4.0修改虚拟机内存（貌似没有效果）

sysctl -w vm.max_map_count=262144使用docker run命令跑容器

docker run -p 9200:9200 -p 9300:9300 –name elasticsearch \

-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 \

-d elasticsearch:6.4.0
docker ps查看容器并没有启动

[root@iZ2zeczvvb79boy368xppwZ ~]# docker ps

CONTAINER ID  IMAGE    COMMAND     CREATED    STATUS    PORTS                              NAMES

edfc400862eb  rabbitmq:3.7.15  “docker-entrypoint.s…” 14 hours ago  Up 14 hours   0.0.0.0:4369->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/tcp rabbitmq

2ae2f3f8dc1f  nginx:1.10   “nginx -g ‘daemon of…” 2 weeks ago   Up 2 weeks   0.0.0.0:80->80/tcp, 443/tcp                        nginx

164e4e7561df  redis:3.2   “docker-entrypoint.s…” 2 weeks ago   Up 2 weeks   0.0.0.0:6379->6379/tcp                          redis

eeabe57f1f21  mysql:5.7   “docker-entrypoint.s…” 2 weeks ago   Up 2 weeks   0.0.0.0:3306->3306/tcp, 33060/tcp                       mysql
docker ps -a 查看容器确实创建了

[root@iZ2zeczvvb79boy368xppwZ ~]# docker ps -a

CONTAINER ID  IMAGE     COMMAND     CREATED    STATUS       PORTS                              NAMES

767829ae1d7c  elasticsearch:6.4.0 “/usr/local/bin/dock…” About a minute ago Exited (1) About a minute ago                                elasticsearch

edfc400862eb  rabbitmq:3.7.15  “docker-entrypoint.s…” 14 hours ago   Up 14 hours      0.0.0.0:4369->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/tcp rabbitmq

2ae2f3f8dc1f  nginx:1.10   “nginx -g ‘daemon of…” 2 weeks ago   Up 2 weeks      0.0.0.0:80->80/tcp, 443/tcp                        nginx

164e4e7561df  redis:3.2    “docker-entrypoint.s…” 2 weeks ago   Up 2 weeks      0.0.0.0:6379->6379/tcp                          redis

eeabe57f1f21  mysql:5.7    “docker-entrypoint.s…” 2 weeks ago   Up 2 weeks      0.0.0.0:3306->3306/tcp, 33060/tcp                       mysql查看日志
docker logs -f elasticsearch命令查看日志发现jvm内存不足

[root@iZ2zeczvvb79boy368xppwZ ~]# docker logs -f elasticsearch

OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.

OpenJDK 64-Bit Server VM warning: INFO: os::commit_memory(0x00007ebf15330000, 549668585472, 0) failed; error=’Not enough space’ (errno=12)

#

# There is insufficient memory for the Java Runtime Environment to continue.

# Native memory allocation (mmap) failed to map 549668585472 bytes for committing reserved memory.

# An error report file with more information is saved as:

# logs/hs_err_pid1.log
解决方法

修改jvm.options文件配置

首先查找jvm.options文件位置（每个服务器的位置可能不同）

[root@iZ2zeczvvb79boy368xppwZ ~]# find / -name jvm.options

/var/lib/docker/overlay2/d399872a3517b4d4acb0d2f70d0625c0f38251ffe5819a1cea00f8213de3e7f5/diff/usr/share/elasticsearch/config/jvm.optionsvim进入文件修改虚拟机最小内存

[root@iZ2zeczvvb79boy368xppwZ ~]# vim /var/lib/docker/overlay2/d399872a3517b4d4acb0d2f70d0625c0f38251ffe5819a1cea00f8213de3e7f5/diff/usr/share/elasticsearch/config/jvm.options找到-Xms属性，修改成512m（我的elasticsearch:6.4.0默认为1g）

## JVM configuration

################################################################

## IMPORTANT: JVM heap size

################################################################

##

## You should always set the min and max JVM heap

## size to the same value. For example, to set

## the heap to 4 GB, set:

##

## -Xms4g

## -Xmx4g

##

## See https://www.elastic.co/guide/en/elasticsearch/reference/current/heap-size.html

## for more information

##

################################################################

# Xms represents the initial size of total heap space

# Xmx represents the maximum size of total heap space

-Xms512m

-Xmx512m
保存并退出


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，然后在底部命令行输入w为保存，q为退出，q!为强制退出。

再次启动容器，docker ps查看容器启动成功

[root@iZ2zeczvvb79boy368xppwZ ~]# docker ps

CONTAINER ID  IMAGE     COMMAND     CREATED    STATUS    PORTS                              NAMES

f5c4ed61196b  elasticsearch:6.4.0 “/usr/local/bin/dock…” 15 minutes ago  Up 15 minutes  0.0.0.0:9200->9200/tcp, 0.0.0.0:9300->9300/tcp                    elasticsearch

edfc400862eb  rabbitmq:3.7.15  “docker-entrypoint.s…” 15 hours ago  Up 15 hours   0.0.0.0:4369->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/tcp rabbitmq

2ae2f3f8dc1f  nginx:1.10   “nginx -g ‘daemon of…” 2 weeks ago   Up 2 weeks   0.0.0.0:80->80/tcp, 443/tcp                        nginx

164e4e7561df  redis:3.2    “docker-entrypoint.s…” 2 weeks ago   Up 2 weeks   0.0.0.0:6379->6379/tcp                          redis

eeabe57f1f21  mysql:5.7    “docker-entrypoint.s…” 2 weeks ago   Up 2 weeks   0.0.0.0:3306->3306/tcp, 33060/tcp                       mysql
总结

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