skywalking-3-存储改为elasticsearch

使用banyandb的standalone模式时，文件是存储到/tmp目录下，有点不方便，还是改回用es吧。

安装es

步骤一：下载和解压Elasticsearch

wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.17.0-linux-x86_64.tar.gz tar -xzf elasticsearch-7.17.0-linux-x86_64.tar.gz sudo mv elasticsearch-7.17.0 /usr/local/elasticsearch 

步骤二：创建Elasticsearch用户和目录

创建用户和组：

groupadd elasticsearch useradd -g elasticsearch -d /usr/local/elasticsearch -s /sbin/nologin elasticsearch 

设置目录权限：

chown -R elasticsearch:elasticsearch /usr/local/elasticsearch 

步骤三：创建Elasticsearch的数据和日志目录

mkdir -p /var/lib/elasticsearch mkdir -p /var/log/elasticsearch chown -R elasticsearch:elasticsearch /var/lib/elasticsearch chown -R elasticsearch:elasticsearch /var/log/elasticsearch 

步骤四：创建systemd服务文件

创建一个新的systemd服务文件：

vi /etc/systemd/system/elasticsearch.service 

在文件中添加以下内容：

[Unit] Description=Elasticsearch Documentation=https://www.elastic.co Wants=network-online.target After=network-online.target  [Service] Type=simple User=elasticsearch Group=elasticsearch ExecStart=/usr/local/elasticsearch/bin/elasticsearch -d StandardOutput=journal StandardError=inherit TimeoutStopSec=20 LimitNOFILE=65536 LimitNPROC=4096 TimeoutStartSec=75 KillMode=process KillSignal=SIGTERM Restart=on-failure WorkingDirectory=/  [Install] WantedBy=multi-user.target 

步骤五：重新加载systemd并启动Elasticsearch

重新加载systemd配置：

systemctl daemon-reload 

步骤六：调整vm.max_map_count

检查当前的大小：

sysctl vm.max_map_count 

如果小于262144则执行如下步骤

1. 打开并编辑 /etc/sysctl.conf 文件：

vi /etc/sysctl.conf 

2. 在文件末尾添加以下行：

vm.max_map_count=262144 

保存并关闭文件。

3. 应用配置更改：

sysctl -p 

步骤七：限制Elasticsearch的内存

es很吃内存，限制下

vi /usr/local/elasticsearch/config/jvm.options 

在文件中找到以下两行，或在文件末尾添加它们：

-Xms4g -Xmx4g 

这表示将最小和最大堆内存都设置为4GB

步骤八：启用并启动Elasticsearch服务

systemctl enable elasticsearch systemctl start elasticsearch 

检查Elasticsearch服务状态：

 systemctl status elasticsearch 

你应该会看到Elasticsearch服务的运行状态。如果一切正常，Elasticsearch应该已经成功安装并在后台运行。

通过发送HTTP请求验证Elasticsearch是否成功启动：

curl -X GET "localhost:9200/" 

你应该会看到Elasticsearch的相关信息，表明它已成功启动并运行。

{   "name" : "node-1",   "cluster_name" : "my-cluster",   "cluster_uuid" : "YiFrowgmQ5OMNVhiBH24Yw",   "version" : {     "number" : "7.17.0",     "build_flavor" : "default",     "build_type" : "tar",     "build_hash" : "bee86328705acaa9a6daede7140defd4d9ec56bd",     "build_date" : "2022-01-28T08:36:04.875279988Z",     "build_snapshot" : false,     "lucene_version" : "8.11.1",     "minimum_wire_compatibility_version" : "6.8.0",     "minimum_index_compatibility_version" : "6.0.0-beta1"   },   "tagline" : "You Know, for Search" } 

将skywalking的存储配置改为es

回到apache-skywalking-apm-bin目录，打开config/application.yml文件，找到以下部分，并进行修改：

storage:   selector: ${SW_STORAGE:elasticsearch}   elasticsearch:     nameSpace: ${SW_NAMESPACE:""}     clusterNodes: ${SW_STORAGE_ES_CLUSTER_NODES:localhost:9200}     protocol: ${SW_STORAGE_ES_HTTP_PROTOCOL:"http"}     connectTimeout: ${SW_STORAGE_ES_CONNECT_TIMEOUT:3000}     socketTimeout: ${SW_STORAGE_ES_SOCKET_TIMEOUT:30000}     user: ${SW_ES_USER:""}     password: ${SW_ES_PASSWORD:""}     trustStorePath: ${SW_STORAGE_ES_SSL_JKS_PATH:""}     trustStorePass: ${SW_STORAGE_ES_SSL_JKS_PASS:""}     dayStep: ${SW_STORAGE_ES_DAY_STEP:1}     indexShardsNumber: ${SW_STORAGE_ES_INDEX_SHARDS_NUMBER:1}     indexReplicasNumber: ${SW_STORAGE_ES_INDEX_REPLICAS_NUMBER:1}     bulkActions: ${SW_STORAGE_ES_BULK_ACTIONS:2000}     flushInterval: ${SW_STORAGE_ES_FLUSH_INTERVAL:10}     concurrentRequests: ${SW_STORAGE_ES_CONCURRENT_REQUESTS:2}     metadataQueryMaxSize: ${SW_STORAGE_ES_QUERY_MAX_SIZE:5000}     segmentQueryMaxSize: ${SW_STORAGE_ES_QUERY_SEGMENT_SIZE:200}     advanced:       - ${SW_STORAGE_ES_ADVANCED:""} 

修改完成后重启下：由于之前是直接nohup启动的，所以要先找到进程kill掉，再执行启动命令：

nohup ./bin/oapService.sh start &