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<h1><a href="/bigdata-postgresql-date-2018-01-17-0938-ch.html"> PostgreSQL Allow Remote Connection </a></h1>
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<h1>PostgreSQL 允许远程机器访问</h1>
<h2>查看默认配置</h2>
<p>PostgreSQL 默认的配置绑定的是<code>localhost</code>, 不允许其他机器链接.</p>
<div class="highlight"><pre><span></span>$ netstat -nlt
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp <span class="m">0</span> <span class="m">0</span> <span class="m">0</span>.0.0.0:443 <span class="m">0</span>.0.0.0:* LISTEN
tcp <span class="m">0</span> <span class="m">0</span> <span class="m">127</span>.0.0.1:11211 <span class="m">0</span>.0.0.0:* LISTEN
tcp <span class="m">0</span> <span class="m">0</span> <span class="m">0</span>.0.0.0:80 <span class="m">0</span>.0.0.0:* LISTEN
tcp <span class="m">0</span> <span class="m">0</span> <span class="m">0</span>.0.0.0:22 <span class="m">0</span>.0.0.0:* LISTEN
tcp <span class="m">0</span> <span class="m">0</span> <span class="m">127</span>.0.0.1:5432 <span class="m">0</span>.0.0.0:* LISTEN
tcp <span class="m">0</span> <span class="m">0</span> <span class="m">127</span>.0.0.1:3737 <span class="m">0</span>.0.0.0:* LISTEN
tcp6 <span class="m">0</span> <span class="m">0</span> :::22 :::* LISTEN
</pre></div>
<p>从上图可以看到端口<code>5432</code>绑定到了<code>127.0.0.1</code>,意味着任何其他企图从其他机器链接到postgresql server都会被拒绝.
使用telnet链接将产生如下信息:</p>
<div class="highlight"><pre><span></span>$ telnet <span class="m">107</span>.170.11.79 <span class="m">5432</span>
Trying <span class="m">107</span>.170.11.79...
telnet: connect to address <span class="m">107</span>.170.11.79: Connection refused
telnet: Unable to connect to remote host
</pre></div>
<h2>配置postgresql.conf</h2>
<p>要处理这问题需要修改<code>postgresql.conf</code>文件.</p>
<div class="highlight"><pre><span></span>$ find <span class="se">\ </span>-name <span class="s2">"postgresql.conf"</span>
/var/lib/pgsql/9.4/data/postgresql.conf
</pre></div>
<p>打开<code>postgresql.conf</code>,找到并替换</p>
<div class="highlight"><pre><span></span><span class="nv">listen_addresses</span> <span class="o">=</span> <span class="s1">'localhost'</span>
</pre></div>
<p>替换为</p>
<div class="highlight"><pre><span></span><span class="nv">listen_addresses</span> <span class="o">=</span> <span class="s1">'*'</span>
</pre></div>
<p>重启postgresql server之后查看</p>
<div class="highlight"><pre><span></span>$ netstat -nlt
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp <span class="m">0</span> <span class="m">0</span> <span class="m">127</span>.0.0.1:11211 <span class="m">0</span>.0.0.0:* LISTEN
tcp <span class="m">0</span> <span class="m">0</span> <span class="m">0</span>.0.0.0:80 <span class="m">0</span>.0.0.0:* LISTEN
tcp <span class="m">0</span> <span class="m">0</span> <span class="m">0</span>.0.0.0:22 <span class="m">0</span>.0.0.0:* LISTEN
tcp <span class="m">0</span> <span class="m">0</span> <span class="m">0</span>.0.0.0:5432 <span class="m">0</span>.0.0.0:* LISTEN
tcp <span class="m">0</span> <span class="m">0</span> <span class="m">127</span>.0.0.1:25 <span class="m">0</span>.0.0.0:* LISTEN
tcp <span class="m">0</span> <span class="m">0</span> <span class="m">127</span>.0.0.1:2812 <span class="m">0</span>.0.0.0:* LISTEN
tcp6 <span class="m">0</span> <span class="m">0</span> ::1:11211 :::* LISTEN
tcp6 <span class="m">0</span> <span class="m">0</span> :::22 :::* LISTEN
tcp6 <span class="m">0</span> <span class="m">0</span> :::5432 :::* LISTEN
tcp6 <span class="m">0</span> <span class="m">0</span> ::1:25 :::* LISTEN
</pre></div>
<p>可以看到端口<em>5432</em>的<em>Local Address</em>已经变成<code>0.0.0.0</code>,这样就可以从其他机器访问到PostgreSQL的服务器了</p>
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<h4>Published</h4>
<time pubdate="pubdate" datetime="2018-01-17T09:38:53+08:00"> 1 17, 2018</time>
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