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<a href="/2019/03/25/1.下载elasticsearch/" class="post-title-link" itemprop="url">elasticSearch集群搭建</a>
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<p>elasticSearch集群搭建</p>
<h2 id="1-下载elasticsearch"><a href="#1-下载elasticsearch" class="headerlink" title="1. 下载elasticsearch"></a>1. 下载elasticsearch</h2><p>官网下载地址<a href="https://www.elastic.co/downloads/elasticsearch" target="_blank" rel="noopener">https://www.elastic.co/downloads/elasticsearch</a></p>
<p>选择版本下载，本文下载了当前版本6.6.2，<a href="https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.6.2.tar.gz" target="_blank" rel="noopener">https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.6.2.tar.gz</a></p>
<p>elastic search不能在root用户下启动，需新建用户。添加es用户，移动elasticsearch-6.6.2到新建用户es目录下。</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">useradd -m es</span><br></pre></td></tr></table></figure>
<h2 id="2-修改系统参数（重要）"><a href="#2-修改系统参数（重要）" class="headerlink" title="2. 修改系统参数（重要）"></a>2. 修改系统参数（重要）</h2><p>在编辑es配置文件之前，先修改系统配置，设置es用户</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">vim /etc/security/limits.conf</span><br></pre></td></tr></table></figure>
<p>在limitts.cofi中添加一下配置，es是刚刚添加的用户，soft指的是当前系统生效的设置值，hard 表明系统中所能设定的最大值，nofile指的是该用户打开文件的最大数目（es要求为至少为65536），noproc指的是进程的最大数目（es要求至少为4096）</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">@es soft nofile 65536</span><br><span class="line">@es hard nofile 65536</span><br><span class="line">@es soft nproc 4096</span><br><span class="line">@es hard nproc 4096</span><br><span class="line">@es soft memlock unlimited</span><br><span class="line">@es hard memlock umlimited</span><br></pre></td></tr></table></figure>
<p>再设置VMA(虚拟内存区域)的数量，es要求至少为262144</p>
<p>执行命令：</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">sysctl -w vm.max_map_count=262144</span><br></pre></td></tr></table></figure>
<p>查看：</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">sysctl -a|grep vm.max_map_count</span><br></pre></td></tr></table></figure>
<p>这是在未配置系统参数之前的报错信息：</p>
<p><img src="/uploads/报错.png" alt>)</p>
<h2 id="3-集群配置"><a href="#3-集群配置" class="headerlink" title="3. 集群配置"></a>3. 集群配置</h2><p>进入elasticsearch-6.6.2/config目录下，修改elasticsearch.yml配置文件，配置端口、文件路径、集群等信息。</p>
<p>主要配置集群名称，节点名称，和绑定ip地址（这儿不配置，如果虚拟机安装的话，可能外网访问不到），master节点的初始列表配置。其他的可以采用默认配置。</p>
<p><strong>将配置文件复制到集群其他机器上，修改node.name和network.host</strong>即可。（重要）</p>
<p>一些配置信息如下：</p>
<figure class="highlight yaml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment"># 集群名称，设置后hi自动发现同一网点下的节点</span></span><br><span class="line"><span class="string">cluster.name:</span> <span class="string">my-application</span></span><br><span class="line"><span class="comment"># 节点名称，默认在启动时会自动创建节点名称，但最好自己配置，有助于利用api访问具体节点</span></span><br><span class="line"><span class="string">node.name:</span> <span class="string">node-2</span></span><br><span class="line"><span class="comment"># 分配给当前节点的索引数据所在位置，默认是es安装位置下的data文件夹</span></span><br><span class="line"><span class="string">path.data:</span> <span class="string">/home/es/data</span></span><br><span class="line"><span class="comment"># 日志文件所在位置，默认是es安装目录下的logs文件夹</span></span><br><span class="line"><span class="string">path.logs:</span> <span class="string">/home/es/logs</span></span><br><span class="line"><span class="comment"># 节点是否为master主节点，每个节点都可被配置成主节点，默认为true</span></span><br><span class="line"><span class="string">node.master:</span> <span class="literal">true</span></span><br><span class="line"><span class="comment"># 设置节点是否存储数据，默认为true，可以设置为主节点但不存储数据</span></span><br><span class="line"><span class="string">node.data:</span> <span class="literal">true</span></span><br><span class="line"><span class="comment"># 设置绑定的IP地址。不设置默认为0.0.0.0,为HTTP传输开启9200~9300端口，为节点间通信开启9300~9400端口</span></span><br><span class="line"><span class="string">network.host:</span> <span class="number">192.168</span><span class="number">.1</span><span class="string">.xx</span></span><br><span class="line"><span class="comment"># 集群间交互的TCP接口</span></span><br><span class="line"><span class="string">transport.port:</span> <span class="number">9300</span></span><br><span class="line"><span class="comment"># 设置是否压缩TCP传输时的数据，默认为false</span></span><br><span class="line"><span class="string">transport.tcp.compress:</span> </span><br><span class="line"><span class="comment"># 设置是否使用HTTP协议对外提供服务，默认为true</span></span><br><span class="line"><span class="string">http.enabled:</span> </span><br><span class="line"><span class="comment"># 设置内容的最大长度，默认为100M</span></span><br><span class="line"><span class="string">http.max_content_length:</span> </span><br><span class="line"><span class="comment"># 设置参数保证集群中的节点可以知道其他N个有master资格的节点，默认为1。对于较大的集群，可以设置 N =（具有master资格的节点数/2）+ 1</span></span><br><span class="line"><span class="string">discovery.zen.minimum_master_nodes:</span> </span><br><span class="line"><span class="comment"># 设置集群中自动发现其他节点时ping连接超时时间，默认为3s</span></span><br><span class="line"><span class="string">discovery.zen.ping_timeout:</span> </span><br><span class="line"><span class="comment"># 设置集群中N个节点启动时进行数据恢复，默认为1</span></span><br><span class="line"><span class="string">gateway.recover_after_nodes:</span></span><br><span class="line"><span class="comment"># 设置数据恢复超时时间，默认为5分组</span></span><br><span class="line"><span class="string">gateway.recover_after_time:</span> </span><br><span class="line"><span class="comment"># 设置集群中节点数量，默认为2，一旦2个节点启动，就会立即进行数据恢复。当然集群是可以动态加入的。</span></span><br><span class="line"><span class="string">gateway.expected_nodes:</span> </span><br><span class="line"><span class="comment"># 初始化数据恢复时并发恢复数量,默认为4</span></span><br><span class="line"><span class="string">cluster.routing.allocation.node_initial_primaries_recoveries:</span> </span><br><span class="line"><span class="comment"># 设置集群中的master节点的初始列表,可以通过这些节点来自动发现新加入的集群节点</span></span><br><span class="line"><span class="string">discovery.zen.ping.unicast.hosts:</span> <span class="string">["host1","host2"]</span></span><br></pre></td></tr></table></figure>
<h2 id="3-启动elasticsearch"><a href="#3-启动elasticsearch" class="headerlink" title="3. 启动elasticsearch"></a>3. 启动elasticsearch</h2><p>分别在每个节点的es目录的bin目录下运行elasticsearch，./elasticsearch</p>
<h2 id="4-测试启动成功"><a href="#4-测试启动成功" class="headerlink" title="4. 测试启动成功"></a>4. 测试启动成功</h2><h3 id="测试节点启动成功"><a href="#测试节点启动成功" class="headerlink" title="测试节点启动成功"></a>测试节点启动成功</h3><p>访问<a href="http://192.168.1.136:9200/，部署的ip/9200，返回以下信息就表示节点启动成功了：" target="_blank" rel="noopener">http://192.168.1.136:9200/，部署的ip/9200，返回以下信息就表示节点启动成功了：</a></p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br></pre></td><td class="code"><pre><span class="line">{</span><br><span class="line"> "name" : "node-1",</span><br><span class="line"> "cluster_name" : "my-application",</span><br><span class="line"> "cluster_uuid" : "cuAq_l7AT4qmLezMwBaT1Q",</span><br><span class="line"> "version" : {</span><br><span class="line"> "number" : "6.6.2",</span><br><span class="line"> "build_flavor" : "default",</span><br><span class="line"> "build_type" : "tar",</span><br><span class="line"> "build_hash" : "3bd3e59",</span><br><span class="line"> "build_date" : "2019-03-06T15:16:26.864148Z",</span><br><span class="line"> "build_snapshot" : false,</span><br><span class="line"> "lucene_version" : "7.6.0",</span><br><span class="line"> "minimum_wire_compatibility_version" : "5.6.0",</span><br><span class="line"> "minimum_index_compatibility_version" : "5.0.0"</span><br><span class="line"> },</span><br><span class="line"> "tagline" : "You Know, for Search"</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<h3 id="查看集群节点"><a href="#查看集群节点" class="headerlink" title="查看集群节点"></a>查看集群节点</h3><p><a href="http://192.168.1.136:9200/_cluster/state?pretty" target="_blank" rel="noopener">http://192.168.1.136:9200/_cluster/state?pretty</a></p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br></pre></td><td class="code"><pre><span class="line">{</span><br><span class="line"> "cluster_name" : "my-application",</span><br><span class="line"> "compressed_size_in_bytes" : 11188,</span><br><span class="line"> "cluster_uuid" : "cuAq_l7AT4qmLezMwBaT1Q",</span><br><span class="line"> "version" : 5,</span><br><span class="line"> "state_uuid" : "sx3oyL1BRCyL7uErnponNA",</span><br><span class="line"> "master_node" : "1G5P69AxSJif47wUfjNtJg",</span><br><span class="line"> "blocks" : { },</span><br><span class="line"> "nodes" : {</span><br><span class="line"> "1G5P69AxSJif47wUfjNtJg" : {</span><br><span class="line"> "name" : "node-1",</span><br><span class="line"> "ephemeral_id" : "s0soWCduQcKJGi81vvUvNw",</span><br><span class="line"> "transport_address" : "192.168.1.136:9300",</span><br><span class="line"> "attributes" : {</span><br><span class="line"> "ml.machine_memory" : "1907970048",</span><br><span class="line"> "rack" : "r1",</span><br><span class="line"> "xpack.installed" : "true",</span><br><span class="line"> "ml.max_open_jobs" : "20",</span><br><span class="line"> "ml.enabled" : "true"</span><br><span class="line"> }</span><br><span class="line"> },</span><br><span class="line"> "UmqevIg_QZyVeUq6B9lKvQ" : {</span><br><span class="line"> "name" : "node-2",</span><br><span class="line"> "ephemeral_id" : "VZXuzh8hSy6aaeWrPBdk3Q",</span><br><span class="line"> "transport_address" : "192.168.1.138:9300",</span><br><span class="line"> "attributes" : {</span><br><span class="line"> "ml.machine_memory" : "1019797504",</span><br><span class="line"> "ml.max_open_jobs" : "20",</span><br><span class="line"> "xpack.installed" : "true",</span><br><span class="line"> "ml.enabled" : "true"</span><br><span class="line"> }</span><br><span class="line"> },</span><br><span class="line"> "51OxDOSFQRqwsVfODQi7pQ" : {</span><br><span class="line"> "name" : "node-3",</span><br><span class="line"> "ephemeral_id" : "sJIRgME_SV-Z3n4Bu6M69A",</span><br><span class="line"> "transport_address" : "192.168.1.139:9300",</span><br><span class="line"> "attributes" : {</span><br><span class="line"> "ml.machine_memory" : "1019797504",</span><br><span class="line"> "ml.max_open_jobs" : "20",</span><br><span class="line"> "xpack.installed" : "true",</span><br><span class="line"> "ml.enabled" : "true"</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> }，</span><br><span class="line"> "metadata" : {</span><br></pre></td></tr></table></figure>
<h3 id="查看集群健康状态"><a href="#查看集群健康状态" class="headerlink" title="查看集群健康状态"></a>查看集群健康状态</h3><p><a href="http://192.168.1.136:9200/_cluster/health?pretty" target="_blank" rel="noopener">http://192.168.1.136:9200/_cluster/health?pretty</a></p>
<p>返回如下：</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br></pre></td><td class="code"><pre><span class="line">{</span><br><span class="line"> "cluster_name" : "my-application",</span><br><span class="line"> "status" : "green",</span><br><span class="line"> "timed_out" : false,</span><br><span class="line"> "number_of_nodes" : 3,</span><br><span class="line"> "number_of_data_nodes" : 3,</span><br><span class="line"> "active_primary_shards" : 0,</span><br><span class="line"> "active_shards" : 0,</span><br><span class="line"> "relocating_shards" : 0,</span><br><span class="line"> "initializing_shards" : 0,</span><br><span class="line"> "unassigned_shards" : 0,</span><br><span class="line"> "delayed_unassigned_shards" : 0,</span><br><span class="line"> "number_of_pending_tasks" : 0,</span><br><span class="line"> "number_of_in_flight_fetch" : 0,</span><br><span class="line"> "task_max_waiting_in_queue_millis" : 0,</span><br><span class="line"> "active_shards_percent_as_number" : 100.0</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
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<p>拖延了大半年，终于开始了写东西。</p>
<p>因为发现学的东西忘的太快了，没法在当前的工作中使用到的技术在写完demo之后没几天就忘得一干二净了</p>
<p>平时也有记录笔记的习惯，但都相对零散，现在开始将系统整理在工作和学习当中遇到的每一个问题，希望能坚持下去，将笔记在博客中记录出来，也希望以后学到的每一个知识都可以用项目的形式表现出来。</p>
<p>以后就每周更新一次，偶尔发点感慨。</p>
<p>“学而不思则罔 思而不学则殆”，与君共勉</p>
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