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Docker搭建Mysql主从配置.html
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<h1 id="Docker配置Mysql主从复制"><a href="#Docker配置Mysql主从复制" class="headerlink" title="Docker配置Mysql主从复制"></a>Docker配置Mysql主从复制</h1><h4 id="为什么基于-Docker-搭建？"><a href="#为什么基于-Docker-搭建？" class="headerlink" title="为什么基于 Docker 搭建？"></a>为什么基于 Docker 搭建？</h4><ul>
<li>一台机器上可以运行多个 Docker 容器</li>
<li>Docker 容器之间相互独立，有独立 ip，互不冲突</li>
<li>Docker 使用步骤简便，启动容器在秒级别</li>
</ul>
<h4 id="利用-Docker-搭建主从服务器"><a href="#利用-Docker-搭建主从服务器" class="headerlink" title="利用 Docker 搭建主从服务器"></a>利用 Docker 搭建主从服务器</h4><p>首先拉取 docker 镜像，这里使用5.7版本的 mysql</p>
<p><code>docker pull mysql:5.7</code></p>
<h4 id="在宿主机中创建配置文件，方便同步到对应的-mysql-容器中的配置"><a href="#在宿主机中创建配置文件，方便同步到对应的-mysql-容器中的配置" class="headerlink" title="在宿主机中创建配置文件，方便同步到对应的 mysql 容器中的配置"></a>在宿主机中创建配置文件，方便同步到对应的 mysql 容器中的配置</h4><p>首先在家目录中创建 mysql_volume， 再分别创建主从配置文件:<br><img src="/images/aa.png" alt=""></p>
<p>其中 master 的 my.cnf 配置内容：</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></pre></td><td class="code"><pre><span class="line">[mysqld]</span><br><span class="line">server_id = 1</span><br><span class="line"></span><br><span class="line">log-bin= mysql-bin</span><br><span class="line"></span><br><span class="line">read-only=0</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">replicate-ignore-db=mysql</span><br><span class="line"></span><br><span class="line">replicate-ignore-db=sys</span><br><span class="line"></span><br><span class="line">replicate-ignore-db=information_schema</span><br><span class="line"></span><br><span class="line">replicate-ignore-db=performance_schema</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">!includedir /etc/mysql/conf.d/</span><br><span class="line"></span><br><span class="line">!includedir /etc/mysql/mysql.conf.d/</span><br></pre></td></tr></table></figure>
<p>slave 的 my.cnf 配置内容：</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></pre></td><td class="code"><pre><span class="line">[mysqld]</span><br><span class="line">server_id = 2</span><br><span class="line"></span><br><span class="line">log-bin= mysql-bin</span><br><span class="line"></span><br><span class="line">read-only=1</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">replicate-ignore-db=mysql</span><br><span class="line"></span><br><span class="line">replicate-ignore-db=sys</span><br><span class="line"></span><br><span class="line">replicate-ignore-db=information_schema</span><br><span class="line"></span><br><span class="line">replicate-ignore-db=performance_schema</span><br><span class="line"></span><br><span class="line"></span><br><span class="line"></span><br><span class="line">!includedir /etc/mysql/conf.d/</span><br><span class="line"></span><br><span class="line">!includedir /etc/mysql/mysql.conf.d/</span><br></pre></td></tr></table></figure>
<h4 id="创建-master-主容器"><a href="#创建-master-主容器" class="headerlink" title="创建 master 主容器"></a>创建 master 主容器</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">docker run --name mastermysql -d -p 3339:3306 -e MYSQL_ROOT_PASSWORD=root -v ~/mysql_volume/master/data:/var/lib/mysql -v ~/mysql_volume/master/conf/my.cnf:/etc/mysql/my.cnf mysql:5.7</span><br></pre></td></tr></table></figure>
<p>对上述命令稍作解释：</p>
<p>–name 指定容器名称, -d 代表后台运行;</p>
<p>-p 3339:3306 将宿主机的3339端口映射到容器3306端口，这样就可以通过访问宿主机的3339端口来间接的连接到容器里的mysql服务了；</p>
<p>MYSQL_ROOT_PASSWORD=root 指定 root 用户的密码为 root;</p>
<p>-v 则是将宿主机配置文件挂载到容器的对应的文件下，间接地操作容器里的配置文件；</p>
<h4 id="创建-slave-从容器"><a href="#创建-slave-从容器" class="headerlink" title="创建 slave 从容器"></a>创建 slave 从容器</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">docker run --name slavemysql -d -p 3340:3306 -e MYSQL_ROOT_PASSWORD=root -v ~/mysql_volume/slave/data:/var/lib/mysql -v ~/mysql_volume/slave/conf/my.cnf:/etc/mysql/my.cnf mysql:5.7</span><br></pre></td></tr></table></figure>
<p>使用 <code>docker ps</code> 查看创建的容器<br><img src="/images/bb.png" alt=""></p>
<p>此时可以使用Navicat等工具测试连接mysql<br><img src="/images/cc.png" alt=""></p>
<h4 id="通过-navicat-工具在-master-数据库创建数据同步用户-并授予-REPLICATION-SLAVE-权限"><a href="#通过-navicat-工具在-master-数据库创建数据同步用户-并授予-REPLICATION-SLAVE-权限" class="headerlink" title="通过 navicat 工具在 master 数据库创建数据同步用户,并授予 REPLICATION SLAVE 权限"></a>通过 navicat 工具在 master 数据库创建数据同步用户,并授予 REPLICATION SLAVE 权限</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">CREATE USER 'slave'@'%' IDENTIFIED BY '123456';</span><br></pre></td></tr></table></figure>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">GRANT REPLICATION SLAVE ON *.* to 'slave'@'%' identified by '123456';</span><br></pre></td></tr></table></figure>
<p>通过<code>show master status;</code>查看状态，记住 File、Position的值，在 slave 中将用到。</p>
<h4 id="通过-navicat-工具在-slave-数据库设置主库链接"><a href="#通过-navicat-工具在-slave-数据库设置主库链接" class="headerlink" title="通过 navicat 工具在 slave 数据库设置主库链接"></a>通过 navicat 工具在 slave 数据库设置主库链接</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">change master to master_host='172.17.0.2',master_user='slave',master_password='123456',master_log_file='mysql-bin.000003',master_log_pos=686,master_port=3306;</span><br></pre></td></tr></table></figure>
<p><strong>命令说明：</strong></p>
<p><strong>master_host</strong> ：Master的地址，指的是容器的独立ip,可以通过<code>docker inspect 容器名称|容器id |grep IPAddress</code>查询容器的ip</p>
<p><strong>master_port</strong>：Master的端口号，指的是容器的端口号</p>
<p><strong>master_user</strong>：用于数据同步的用户</p>
<p><strong>master_password</strong>：用于同步的用户的密码</p>
<p><strong>master_log_file</strong>：指定 Slave 从哪个日志文件开始复制数据，即上文中提到的 File 字段的值</p>
<p><strong>master_log_pos</strong>：从哪个 Position 开始读，即上文中提到的 Position 字段的值</p>
<p><strong>master_connect_retry</strong>：如果连接失败，重试的时间间隔，单位是秒，默认是60秒</p>
<h4 id="启动从库同步"><a href="#启动从库同步" class="headerlink" title="启动从库同步"></a>启动从库同步</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">start slave;</span><br></pre></td></tr></table></figure>
<p>如果 <code>show slave status;</code>命令结果中出现： Slave_IO_Running: Yes Slave_SQL_Running: Yes 以上两项都为Yes，那说明没问题了。 </p>
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<div class="post-toc-content"><ol class="nav"><li class="nav-item nav-level-1"><a class="nav-link" href="#Docker配置Mysql主从复制"><span class="nav-number">1.</span> <span class="nav-text">Docker配置Mysql主从复制</span></a><ol class="nav-child"><li class="nav-item nav-level-4"><a class="nav-link" href="#为什么基于-Docker-搭建？"><span class="nav-number">1.0.0.1.</span> <span class="nav-text">为什么基于 Docker 搭建？</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#利用-Docker-搭建主从服务器"><span class="nav-number">1.0.0.2.</span> <span class="nav-text">利用 Docker 搭建主从服务器</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#在宿主机中创建配置文件，方便同步到对应的-mysql-容器中的配置"><span class="nav-number">1.0.0.3.</span> <span class="nav-text">在宿主机中创建配置文件，方便同步到对应的 mysql 容器中的配置</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#创建-master-主容器"><span class="nav-number">1.0.0.4.</span> <span class="nav-text">创建 master 主容器</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#创建-slave-从容器"><span class="nav-number">1.0.0.5.</span> <span class="nav-text">创建 slave 从容器</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#通过-navicat-工具在-master-数据库创建数据同步用户-并授予-REPLICATION-SLAVE-权限"><span class="nav-number">1.0.0.6.</span> <span class="nav-text">通过 navicat 工具在 master 数据库创建数据同步用户,并授予 REPLICATION SLAVE 权限</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#通过-navicat-工具在-slave-数据库设置主库链接"><span class="nav-number">1.0.0.7.</span> <span class="nav-text">通过 navicat 工具在 slave 数据库设置主库链接</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#启动从库同步"><span class="nav-number">1.0.0.8.</span> <span class="nav-text">启动从库同步</span></a></li></ol></li></ol></li></ol></li></ol></div>
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