- 在运行或启动elasticsearch容器前，先在宿主机上执行 sysctl -w vm.max_map_count=262144：
- 解决“ max virtual memory areas vm.maxmapcount [65530] is too low ”错误问题。
- 解决容器中/etc/sysctl.conf不可写，sysctl -w vm.max_map_count=262144无效问题。
- 本人也尝试过在docker run 时使用--sysctl vm.max_map_count=262144选项，但提示not whitelisted。
- 关于JAVA的安装，本机采用default-jre 。参考 How To Install Java with Apt-Get on Debian 8，不要求设置环境变量CLASSPATH：
export CLASSPATH=.:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
也不要求设置环境变量PATH：
export PATH=$JAVA_HOME/bin:$PATH
只需要设置环境变量JAVA_HOME：红色字体部分根据具体版本进行替换
export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64 - 聚合：参考 ElasticsearchDSL / Aggregation
安装Elasticsearch
1. 编写Dockerfile：
FROM ubuntu MAINTAINER cenze <272666745@qq.com> RUN ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime ADD conf/sources.list /etc/apt/ RUN apt-get update && apt-get install -y apt-utils vim unzip default-jre ENV ESEARCH /usr/local/elasticsearch-6.0.1 ADD packages/elasticsearch-6.0.1.zip /usr/local/ RUN unzip /usr/local/elasticsearch-6.0.1 -d /usr/local && adduser --disabled-login --disabled-password --no-create-home es ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64 ENV PATH $ESEARCH/bin:$PATH ADD conf/elasticsearch.yml /usr/local/elasticsearch-6.0.1/config/ RUN chown -R es:es /usr/local/elasticsearch-6.0.1 EXPOSE 9200 9300 CMD ["elasticsearch"]
2. build镜像：
sudo docker build -t cenze/esearch -f Dockerfile-ESearch .
3. 以非root用户run容器，否则elasticsearch无法启动：
sudo docker run -d -p 9200:9200 -p 9300:9300 --name esearch --user es cenze/esearch
4. curl http://localhost:9200：
{ "name" : "D_5lS8A", "cluster_name" : "elasticsearch", "cluster_uuid" : "wS2pUZ95TC2jCRJ5GMvNsA", "version" : { "number" : "6.0.1", "build_hash" : "601be4a", "build_date" : "2017-12-04T09:29:09.525Z", "build_snapshot" : false, "lucene_version" : "7.0.1", "minimum_wire_compatibility_version" : "5.6.0", "minimum_index_compatibility_version" : "5.0.0" }, "tagline" : "You Know, for Search" }
安装中文分词插件ik
也可以是smartcn。ik的版本要与Elasticsearch版本匹配，本人用的6.0.1：
es@053b32506e8d:/$ elasticsearch-plugin install https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v6.0.1/elasticsearch-analysis-ik-6.0.1.zip es@053b32506e8d:/$ elasticsearch-plugin list analysis-ik
测试中文关键词搜索
下列操作参考 https://github.com/medcl/elasticsearch-analysis-ik/
1. 创建索引：curl -X PUT http://localhost:9200/test/group。
2. mapping：
curl -XPOST -H‘content-type: application/json‘ http://localhost:9200/index/fulltext/_mapping -d‘
{
"properties": {
"content": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_max_word"
}
}
}‘
3. 索引多个文档：
curl -XPOST -H‘content-type: application/json‘ http://localhost:9200/index/fulltext/1 -d‘
{"content":"美国留给伊拉克的是个烂摊子吗"}
‘
curl -XPOST -H‘content-type: application/json‘ http://localhost:9200/index/fulltext/2 -d‘
{"content":"公安部：各地校车将享最高路权"}
‘
curl -XPOST -H‘content-type: application/json‘ http://localhost:9200/index/fulltext/3 -d‘
{"content":"中韩渔警冲突调查：韩警平均每天扣1艘中国渔船"}
‘
curl -XPOST -H‘content-type: application/json‘ http://localhost:9200/index/fulltext/4 -d‘
{"content":"中国驻洛杉矶领事馆遭亚裔男子枪击 嫌犯已自首"}
‘
4. 搜索测试：
curl -XPOST -H‘content-type: application/json‘ http://localhost:9200/index/fulltext/_search -d‘
{
"query" : { "match" : { "content" : "中国" }},
"highlight" : {
"pre_tags" : ["<tag1>", "<tag2>"],
"post_tags" : ["</tag1>", "</tag2>"],
"fields" : {
"content" : {}
}
}
}
‘
