https://www.809508860.xyz/tags/group/ Recent content in Group on Colben Notes Hugo zh-cn Tue, 28 Apr 2020 00:52:00 +0800 https://www.809508860.xyz/post/mysql-group-replication/ Tue, 28 Apr 2020 00:52:00 +0800 https://www.809508860.xyz/post/mysql-group-replication/ <h2 id="环境">环境</h2> <table> <thead> <tr> <th>hostname</th> <th>ip</th> <th>os</th> <th>mysql</th> </tr> </thead> <tbody> <tr> <td>mysql_11</td> <td>192.168.1.11</td> <td>centos7.7</td> <td>8.0.19</td> </tr> <tr> <td>mysql_22</td> <td>192.168.1.22</td> <td>centos7.7</td> <td>8.0.19</td> </tr> <tr> <td>mysql_33</td> <td>192.168.1.33</td> <td>centos7.7</td> <td>8.0.19</td> </tr> </tbody> </table> <h2 id="安装-mysql">安装 mysql</h2> <ul> <li>懒得写了 &hellip;</li> </ul> <h2 id="修改-mycnf">修改 my.cnf</h2> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt"> 1 </span><span class="lnt"> 2 </span><span class="lnt"> 3 </span><span class="lnt"> 4 </span><span class="lnt"> 5 </span><span class="lnt"> 6 </span><span class="lnt"> 7 </span><span class="lnt"> 8 </span><span class="lnt"> 9 </span><span class="lnt">10 </span><span class="lnt">11 </span><span class="lnt">12 </span><span class="lnt">13 </span><span class="lnt">14 </span><span class="lnt">15 </span><span class="lnt">16 </span><span class="lnt">17 </span><span class="lnt">18 </span><span class="lnt">19 </span><span class="lnt">20 </span><span class="lnt">21 </span><span class="lnt">22 </span><span class="lnt">23 </span><span class="lnt">24 </span><span class="lnt">25 </span><span class="lnt">26 </span><span class="lnt">27 </span><span class="lnt">28 </span><span class="lnt">29 </span><span class="lnt">30 </span><span class="lnt">31 </span><span class="lnt">32 </span><span class="lnt">33 </span><span class="lnt">34 </span><span class="lnt">35 </span><span class="lnt">36 </span><span class="lnt">37 </span><span class="lnt">38 </span><span class="lnt">39 </span><span class="lnt">40 </span><span class="lnt">41 </span><span class="lnt">42 </span><span class="lnt">43 </span><span class="lnt">44 </span><span class="lnt">45 </span><span class="lnt">46 </span><span class="lnt">47 </span><span class="lnt">48 </span><span class="lnt">49 </span><span class="lnt">50 </span><span class="lnt">51 </span><span class="lnt">52 </span><span class="lnt">53 </span><span class="lnt">54 </span><span class="lnt">55 </span><span class="lnt">56 </span><span class="lnt">57 </span><span class="lnt">58 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-gdscript3" data-lang="gdscript3"><span class="line"><span class="cl"><span class="c1"># mysql_11(选择一个)</span> </span></span><span class="line"><span class="cl"><span class="n">server</span><span class="o">-</span><span class="n">id</span> <span class="o">=</span> <span class="mi">11</span> </span></span><span class="line"><span class="cl"><span class="c1"># mysql_22(选择一个)</span> </span></span><span class="line"><span class="cl"><span class="n">server</span><span class="o">-</span><span class="n">id</span> <span class="o">=</span> <span class="mi">22</span> </span></span><span class="line"><span class="cl"><span class="c1"># mysql_33(选择一个)</span> </span></span><span class="line"><span class="cl"><span class="n">server</span><span class="o">-</span><span class="n">id</span> <span class="o">=</span> <span class="mi">33</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="c1"># 开启 binlog</span> </span></span><span class="line"><span class="cl"><span class="nb">log</span><span class="o">-</span><span class="n">bin</span> <span class="o">=</span> <span class="o">/</span><span class="k">var</span><span class="o">/</span><span class="nb">log</span><span class="o">/</span><span class="n">mysql</span><span class="o">-</span><span class="n">bin</span><span class="o">/</span><span class="n">master</span> </span></span><span class="line"><span class="cl"><span class="n">binlog</span><span class="o">-</span><span class="n">format</span> <span class="o">=</span> <span class="n">ROW</span> </span></span><span class="line"><span class="cl"><span class="c1"># 关闭 binlog 校验</span> </span></span><span class="line"><span class="cl"><span class="n">binlog</span><span class="o">-</span><span class="n">checksum</span> <span class="o">=</span> <span class="n">NONE</span> </span></span><span class="line"><span class="cl"><span class="c1"># 保留 2 天的 binlog</span> </span></span><span class="line"><span class="cl"><span class="n">binlog</span><span class="o">-</span><span class="n">expire</span><span class="o">-</span><span class="n">logs</span><span class="o">-</span><span class="n">seconds</span> <span class="o">=</span> <span class="mi">172800</span> </span></span><span class="line"><span class="cl"><span class="c1"># 开启 gtid</span> </span></span><span class="line"><span class="cl"><span class="n">gtid</span><span class="o">-</span><span class="n">mode</span> <span class="o">=</span> <span class="n">ON</span> </span></span><span class="line"><span class="cl"><span class="n">enforce</span><span class="o">-</span><span class="n">gtid</span><span class="o">-</span><span class="n">consistency</span> <span class="o">=</span> <span class="n">TRUE</span> </span></span><span class="line"><span class="cl"><span class="c1"># 指定 relay-log 存储位置</span> </span></span><span class="line"><span class="cl"><span class="n">relay</span><span class="o">-</span><span class="nb">log</span> <span class="o">=</span> <span class="o">/</span><span class="k">var</span><span class="o">/</span><span class="n">lib</span><span class="o">/</span><span class="n">mysql</span><span class="o">-</span><span class="n">bin</span><span class="o">/</span><span class="n">slave</span> </span></span><span class="line"><span class="cl"><span class="c1"># relay-log 更新计入 binlog</span> </span></span><span class="line"><span class="cl"><span class="nb">log</span><span class="o">-</span><span class="n">slave</span><span class="o">-</span><span class="n">updates</span> <span class="o">=</span> <span class="n">TRUE</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="c1"># 多线程执行从库日志(可选)</span> </span></span><span class="line"><span class="cl"><span class="n">slave</span><span class="o">-</span><span class="n">parallel</span><span class="o">-</span><span class="n">workers</span> <span class="o">=</span> <span class="mi">2</span> </span></span><span class="line"><span class="cl"><span class="n">slave</span><span class="o">-</span><span class="n">parallel</span><span class="o">-</span><span class="n">type</span> <span class="o">=</span> <span class="n">LOGICAL_CLOCK</span> </span></span><span class="line"><span class="cl"><span class="n">slave</span><span class="o">-</span><span class="n">preserve</span><span class="o">-</span><span class="n">commit</span><span class="o">-</span><span class="n">order</span> <span class="o">=</span> <span class="n">ON</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="c1"># 存储引擎只能用 InnoDB</span> </span></span><span class="line"><span class="cl"><span class="n">disabled</span><span class="o">-</span><span class="n">storage</span><span class="o">-</span><span class="n">engines</span> <span class="o">=</span> <span class="s2">&#34;MyISAM,BLACKHOLE,FEDERATED,ARCHIVE,MEMORY&#34;</span> </span></span><span class="line"><span class="cl"><span class="c1"># 加载插件，克隆插件用于快速 state transfer</span> </span></span><span class="line"><span class="cl"><span class="n">plugin</span><span class="o">-</span><span class="nb">load</span><span class="o">-</span><span class="n">add</span> <span class="o">=</span> <span class="s2">&#34;group_replication.so;mysql_clone.so&#34;</span> </span></span><span class="line"><span class="cl"><span class="c1"># 集群 uuid</span> </span></span><span class="line"><span class="cl"><span class="n">group</span><span class="o">-</span><span class="n">replication</span><span class="o">-</span><span class="n">group</span><span class="o">-</span><span class="n">name</span> <span class="o">=</span> <span class="s2">&#34;aaaa1111-bbbb-2222-cccc-3333dddd4444&#34;</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="c1"># mysql_11(选择一个)</span> </span></span><span class="line"><span class="cl"><span class="n">group</span><span class="o">-</span><span class="n">replication</span><span class="o">-</span><span class="n">local</span><span class="o">-</span><span class="n">address</span> <span class="o">=</span> <span class="s2">&#34;192.168.1.11:33061&#34;</span> </span></span><span class="line"><span class="cl"><span class="c1"># mysql_22(选择一个)</span> </span></span><span class="line"><span class="cl"><span class="n">group</span><span class="o">-</span><span class="n">replication</span><span class="o">-</span><span class="n">local</span><span class="o">-</span><span class="n">address</span> <span class="o">=</span> <span class="s2">&#34;192.168.1.22:33061&#34;</span> </span></span><span class="line"><span class="cl"><span class="c1"># mysql_33(选择一个)</span> </span></span><span class="line"><span class="cl"><span class="n">group</span><span class="o">-</span><span class="n">replication</span><span class="o">-</span><span class="n">local</span><span class="o">-</span><span class="n">address</span> <span class="o">=</span> <span class="s2">&#34;192.168.1.33:33061&#34;</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="c1"># 种子节点</span> </span></span><span class="line"><span class="cl"><span class="n">group</span><span class="o">-</span><span class="n">replication</span><span class="o">-</span><span class="n">group</span><span class="o">-</span><span class="n">seeds</span> <span class="o">=</span> <span class="s2">&#34;192.168.1.11:33061,192.168.1.22:33061,192.168.1.33:33061&#34;</span> </span></span><span class="line"><span class="cl"><span class="c1"># 新主库在执行完自己的从库日志后，再处理用户的写请求</span> </span></span><span class="line"><span class="cl"><span class="n">group</span><span class="o">-</span><span class="n">replication</span><span class="o">-</span><span class="n">consistency</span> <span class="o">=</span> <span class="n">BEFORE_ON_PRIMARY_FAILOVER</span> </span></span><span class="line"><span class="cl"><span class="c1"># 启动时，不自动创建/初始化新集群</span> </span></span><span class="line"><span class="cl"><span class="n">group</span><span class="o">-</span><span class="n">replication</span><span class="o">-</span><span class="n">bootstrap</span><span class="o">-</span><span class="n">group</span> <span class="o">=</span> <span class="n">OFF</span> </span></span><span class="line"><span class="cl"><span class="c1"># 新节点启动时，先不启动组复制，待手动配置完成并确认正常后，再把 OFF 改成 ON</span> </span></span><span class="line"><span class="cl"><span class="n">group</span><span class="o">-</span><span class="n">replication</span><span class="o">-</span><span class="n">start</span><span class="o">-</span><span class="n">on</span><span class="o">-</span><span class="n">boot</span> <span class="o">=</span> <span class="n">OFF</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="c1"># 怀疑某节点不可用，2秒内，如果该嫌疑节点依旧无响应，则开除它(可选)</span> </span></span><span class="line"><span class="cl"><span class="n">group</span><span class="o">-</span><span class="n">replication</span><span class="o">-</span><span class="n">member</span><span class="o">-</span><span class="n">expel</span><span class="o">-</span><span class="n">timeout</span> <span class="o">=</span> <span class="mi">2</span> </span></span><span class="line"><span class="cl"><span class="c1"># 2秒内，依旧连接不上主网(majority)，则退出组复制，进入 ERROR 状态(可选)</span> </span></span><span class="line"><span class="cl"><span class="n">group</span><span class="o">-</span><span class="n">replication</span><span class="o">-</span><span class="n">unreachable</span><span class="o">-</span><span class="n">majority</span><span class="o">-</span><span class="n">timeout</span> <span class="o">=</span> <span class="mi">2</span> </span></span><span class="line"><span class="cl"><span class="c1"># 退出组复制后，不再尝试重新加入组复制，直接执行指定的退出动作(默认)</span> </span></span><span class="line"><span class="cl"><span class="n">group</span><span class="o">-</span><span class="n">replication</span><span class="o">-</span><span class="n">autorejoin</span><span class="o">-</span><span class="n">tries</span> <span class="o">=</span> <span class="mi">0</span> </span></span><span class="line"><span class="cl"><span class="c1"># 指定退出动作: 数据库设置超级只读并关闭客户端连接(推荐)</span> </span></span><span class="line"><span class="cl"><span class="n">group</span><span class="o">-</span><span class="n">replication</span><span class="o">-</span><span class="n">exit</span><span class="o">-</span><span class="n">state</span><span class="o">-</span><span class="n">action</span> <span class="o">=</span> <span class="n">OFFLINE_MODE</span> </span></span></code></pre></td></tr></table> </div> </div><h2 id="初始化集群">初始化集群</h2> <ul> <li> <p>重新启动节点 mysql_11</p>