elasticsearch-6.8.4编译

## elasticsearch-6.8.4编译

- what: elasticsearch-6.8.4编译
- where: centos8 aarch64   
- when: 2022-1-14
- who: 姚向雷
- why: 记录
- how:

### 1.环境

#### 1.1 依赖安装

```bash
yum install rpm-build gcc-c++ make vim wget net-tools passwd  -y
```

#### 2.1 jdk安装

```bash
wget https://github.com/AdoptOpenJDK/openjdk12-binaries/releases/download/jdk12u-2019-09-25-09-23/OpenJDK12U-jdk_aarch64_linux_hotspot_2019-09-25-09-23.tar.gz
#解压
tar -zxvf OpenJDK12U-jdk_aarch64_linux_hotspot_2019-10-16-11-08.tar.gz
#配置环境变量
vim /etc/profile
export JAVA_HOME=/opt/jdk-12.0.2+10/
export PATH=$JAVA_HOME/bin:$PATH
source /etc/profile
```

### 2.编译

```bash
wget https://github.com/elastic/elasticsearch/archive/v6.8.4.tar.gz
tar -zxvf v6.8.4.tar.gz 
cd elasticsearch-6.8.4/
./gradlew assemble -x :distribution:packages:buildDeb -x :distribution:packages:buildOssDeb
#成功后，rpm包路径为：
distribution/packages/rpm/build/distributions/elasticsearch-6.8.6-SNAPSHOT.rpm
```

### 3.部署

```bash
#安装rpm包
cd distribution/packages/rpm/build/distributions/
yum install elasticsearch-6.8.4-SNAPSHOT.rpm -y
#修改配置
vim /etc/elasticsearch/elasticsearch.yml
X-Pack只支持x86_64，需要禁用，否则运行es会报错
#添加以下内容
xpack.ml.enabled: false

#启动
sudo systemctl daemon-reload
sudo systemctl enable elasticsearch.service
sudo systemctl start elasticsearch.service
```

### 4.问题解决

问题1：启动es时报java环境未设置

```bash
[root@b156873121b1 opt]# systemctl status elasticsearch.service
 elasticsearch.service - Elasticsearch
   Loaded: loaded (/usr/lib/systemd/system/elasticsearch.service; disabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Fri 2022-01-14 07:58:12 UTC; 6s ago
     Docs: http://www.elastic.co
  Process: 3300 ExecStart=/usr/share/elasticsearch/bin/elasticsearch -p ${PID_DIR}/elasticsearch.pid --qu>
 Main PID: 3300 (code=exited, status=1/FAILURE)

Jan 14 07:58:12 b156873121b1 systemd[1]: Started Elasticsearch.
Jan 14 07:58:12 b156873121b1 elasticsearch[3300]: which: no java in (/usr/local/sbin:/usr/local/bin:/usr/>
Jan 14 07:58:12 b156873121b1 elasticsearch[3300]: warning: Falling back to java on path. This behavior is>
Jan 14 07:58:12 b156873121b1 elasticsearch[3300]: could not find java; set JAVA_HOME
Jan 14 07:58:12 b156873121b1 systemd[1]: elasticsearch.service: Main process exited, code=exited, status=>
Jan 14 07:58:12 b156873121b1 systemd[1]: elasticsearch.service: Failed with result 'exit-code'.
```

问题解决：

环境变量问题，删除之前的Java，重新安装java

java安装

```bash
wget https://github.com/AdoptOpenJDK/openjdk8-binaries/releases/download/jdk8u252-b09/OpenJDK8U-jdk_aarch64_linux_hotspot_8u252b09.tar.gz
tar -zxf OpenJDK8U-jdk_aarch64_linux_hotspot_8u252b09.tar.gz
mkdir -p /opt/
mv jdk8u252-b09 /opt/
vim /etc/profile
export JAVA_HOME=/opt/jdk8u252-b09
export PATH=$JAVA_HOME/bin:$PATH
source /etc/profile
```

在es中设置java环境变量

```bash
在/etc/sysconfig/elasticsearch增加环境变量，
JAVA_HOME=/opt/jdk8u252-b09
参考：https://www.cnblogs.com/FengGeBlog/p/10266126.html
```