ElasticSearch 安装
环境:centos-release-6-10.el6.centos.12.3.x86_64
es: elasticsearch-7.9.3-linux-x86_64.tar.gz
(查看环境的命令:rpm -q centos-release, 版本要下对, 本地已安装java8, 但是当前es7.9.3的版本需要java11, 我们还需要安装一个jdk11)
1. 下载elasticsearch-7.9.3-linux-x86_64.tar.gz
地址: https://www.elastic.co/cn/downloads/elasticsearch
选择->LINUX X86_64
上传到linux服务器 /home/servers(自定义的路径) 路径下
2.下载java11
官方账号登录了半天登录不上....找了一个镜像站,地址如下:
地址: https://mirrors.tuna.tsinghua.edu.cn/AdoptOpenJDK/11/jdk/x64/linux/
3. 解压es
#使用root账号操作
[root@bogon servers]# tar -zxvf elasticsearch-7.9.3-linux-x86_64.tar.gz
#es只能使用普通用户启动, 所以需要创建一个es用户, 用户名我们设为elastic, 密码也设为elastic
[root@bogon servers]# useradd -m elastic
[root@bogon servers]# passwd elastic
输入密码即可
4. 安装jdk11
解压压缩包即可, 可以不配置环境变量, 因为我们的项目都是用的jdk8, 可以修改es的启动脚本, 配置它使用jdk11,
5. 启动es, 接下来会报很多的错误,导致启动失败, 从网上找到了解决办法如下:
(1) future versions of Elasticsearch will require Java 11; your Java version from [/usr/local/jdk1.8.0_261/jre] does not meet this requirement
说明需要一个java11环境, 我们修改启动脚本, 在es目录下的bin下
# vim elasticsearch
参考了网上打算的博客, 修改完的启动脚本如下:
1 #!/bin/bash
2 # CONTROLLING STARTUP:
3
4 # 你好,此版本需要使用jdk11 haosw
5
6 # This script relies on a few environment variables to determine startup
7 # behavior, those variables are:
8 #
9 # ES_PATH_CONF -- Path to config directory
10 # ES_JAVA_OPTS -- External Java Opts on top of the defaults set
11 #
12 # Optionally, exact memory values can be set using the `ES_JAVA_OPTS`. Example
13 # values are "512m", and "10g".
14 #
15 # ES_JAVA_OPTS="-Xms8g -Xmx8g" ./bin/elasticsearch
16
17 # 我添加的start
18 export JAVA_HOME=/usr/local/jdk-11.0.9/
19 export PATH=$JAVA_HOME/bin:$PATH
20 # 我添加的 end
21
22 source "`dirname "$0"`"/elasticsearch-env
23
24 CHECK_KEYSTORE=true
25 DAEMONIZE=false
26 for option in "$@"; do
27 case "$option" in
28 -h|--help|-V|--version)
29 CHECK_KEYSTORE=false
30 ;;
31 -d|--daemonize)
32 DAEMONIZE=true
33 ;;
34 esac
35 done
36
37 if [ -z "$ES_TMPDIR" ]; then
38 ES_TMPDIR=`"$JAVA" "$XSHARE" -cp "$ES_CLASSPATH" org.elasticsearch.tools.launchers.TempDirectory`
39 fi
40
41 # get keystore password before setting java options to avoid
42 # conflicting GC configurations for the keystore tools
43 unset KEYSTORE_PASSWORD
44 KEYSTORE_PASSWORD=
45 if [[ $CHECK_KEYSTORE = true ]] \
46 && bin/elasticsearch-keystore has-passwd --silent
47 then
48 if ! read -s -r -p "Elasticsearch keystore password: " KEYSTORE_PASSWORD ; then
49 echo "Failed to read keystore password on console" 1>&2
50 exit 1
51 fi
52 fi
53
54 # The JVM options parser produces the final JVM options to start Elasticsearch.
55 # It does this by incorporating JVM options in the following way:
56 # - first, system JVM options are applied (these are hardcoded options in the
57 # parser)
58 # - second, JVM options are read from jvm.options and jvm.options.d/*.options
59 # - third, JVM options from ES_JAVA_OPTS are applied
60 # - fourth, ergonomic JVM options are applied
61 # 我添加的 start
62 if [ -x "$JAVA_HOME/bin/java" ]; then
63 JAVA="/usr/local/jdk-11.0.9/bin/java"
64 else
65 JAVA=`which java`
66 fi
67 # 我添加的 end
68
69 ES_JAVA_OPTS=`export ES_TMPDIR; "$JAVA" "$XSHARE" -cp "$ES_CLASSPATH" org.elasticsearch.tools.launchers.JvmOptionsParser "$ES_PATH_CONF"`
70
71 # manual parsing to find out, if process should be detached
72 if [[ $DAEMONIZE = false ]]; then
73 exec \
74 "$JAVA" \
75 "$XSHARE" \
76 $ES_JAVA_OPTS \
77 -Des.path.home="$ES_HOME" \
78 -Des.path.conf="$ES_PATH_CONF" \
79 -Des.distribution.flavor="$ES_DISTRIBUTION_FLAVOR" \
80 -Des.distribution.type="$ES_DISTRIBUTION_TYPE" \
81 -Des.bundled_jdk="$ES_BUNDLED_JDK" \
82 -cp "$ES_CLASSPATH" \
83 org.elasticsearch.bootstrap.Elasticsearch \
84 "$@" <<<"$KEYSTORE_PASSWORD"
85 else
86 exec \
87 "$JAVA" \
88 "$XSHARE" \
89 $ES_JAVA_OPTS \
90 -Des.path.home="$ES_HOME" \
91 -Des.path.conf="$ES_PATH_CONF" \
92 -Des.distribution.flavor="$ES_DISTRIBUTION_FLAVOR" \
93 -Des.distribution.type="$ES_DISTRIBUTION_TYPE" \
94 -Des.bundled_jdk="$ES_BUNDLED_JDK" \
95 -cp "$ES_CLASSPATH" \
96 org.elasticsearch.bootstrap.Elasticsearch \
97 "$@" \
98 <<<"$KEYSTORE_PASSWORD" &
99 retval=$?
100 pid=$!
101 [ $retval -eq 0 ] || exit $retval
102 if [ ! -z "$ES_STARTUP_SLEEP_TIME" ]; then
103 sleep $ES_STARTUP_SLEEP_TIME
104 fi
105 if ! ps -p $pid > /dev/null ; then
106 exit 1
107 fi
108 exit 0
109 fi
110
111 exit $?
(2) [WARN ][o.e.b.JNANatives ] unable to install syscall filter: java.lang.UnsupportedOperationException: seccomp unavailable: CONFIG_SECCOMP not compiled into kernel, CONFIG_SECCOMP and CONFIG_SECCOMP_FILTER are needed
at org.elasticsearch.bootstrap.SystemCallFilter.linuxImpl(SystemCallFilter.java:363)
解决办法:
修改elasticsearch.yml 添加以下内容:
bootstrap.memory_lock: false
bootstrap.system_call_filter: false
(3)ERROR: bootstrap checks failed
max file descriptors [4096] for elasticsearch process likely too low, increase to at least [65536]
max number of threads [1024] for user [lishang] likely too low, increase to at least [2048]
vi /etc/security/limits.conf
添加如下内容:
* soft nofile 65536
* hard nofile 131072
* soft nproc 2048
* hard nproc 4096
(4) max number of threads [1024] for user [lish] likely too low, increase to at least [2048]
解决：切换到root用户，进入limits.d目录下修改配置文件。
vi /etc/security/limits.d/90-nproc.conf
修改如下内容：
* soft nproc 1024
#修改为
* soft nproc 2048
(5)max virtual memory areas vm.max_map_count [65530] likely too low, increase to at least [262144]
解决：切换到root用户修改配置sysctl.conf
vi /etc/sysctl.conf
添加下面配置：
vm.max_map_count=655360
并执行命令：
sysctl -p
(6)ax file descriptors [4096] for elasticsearch process likely too low, increase to at least [65536]
解决：修改切换到root用户修改配置limits.conf 添加下面两行
命令:vi /etc/security/limits.conf
* hard nofile 65536
* soft nofile 65536
(7)ERROR: [1] bootstrap checks failed
[1]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured
解决办法;
vim elasticsearch.yml
放开注释:node.name: node-1
放开注释,删除多余节点,保留一个节点:
cluster.initial_master_nodes: ["node-1"]
此时再次切换成es用户: su elastic
启动es, 进入es目录下的bin/, 输入 ./elasticsearch
启动成功
6. 远程访问
修改es安装目录下的 config/elasticsearch.yml 去掉 network.host ,将值改为0.0.0.0 ,去掉 http.port 的注释, 使用端口9200, 重启es 可以远程访问
7. 后台启动
nohup ./elasticsearch&
8. 访问查看结果
http://192.168.1.128:9200 返回结果:
{
"name": "node-1",
"cluster_name": "elasticsearch",
"cluster_uuid": "JA5U86VwToiwx7ggaOfm9w",
"version": {
"number": "7.9.3",
"build_flavor": "default",
"build_type": "tar",
"build_hash": "c4138e51121ef06a6404866cddc601906fe5c868",
"build_date": "2020-10-16T10:36:16.141335Z",
"build_snapshot": false,
"lucene_version": "8.6.2",
"minimum_wire_compatibility_version": "6.8.0",
"minimum_index_compatibility_version": "6.0.0-beta1"
},
"tagline": "You Know, for Search"
}
