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<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom">
<title><![CDATA[第九块石头]]></title>
<link href="http://dijkst.github.io/atom.xml" rel="self"/>
<link href="http://dijkst.github.io/"/>
<updated>2018-01-05T17:16:46+08:00</updated>
<id>http://dijkst.github.io/</id>
<author>
<name><![CDATA[dijkst]]></name>
</author>
<generator uri="http://octopress.org/">Octopress</generator>
<entry>
<title type="html"><![CDATA[BlueLock Release v1.0.6]]></title>
<link href="http://dijkst.github.io/blog/2015/02/14/bluelock-release-v1-dot-0-3.en/"/>
<updated>2015-02-14T13:35:00+08:00</updated>
<id>http://dijkst.github.io/blog/2015/02/14/bluelock-release-v1-dot-0-3.en</id>
<content type="html"><![CDATA[<p>BlueLock turns your iPhone into a key that can lock/unlock your Mac.</p>
<p>Strategy is quite simple:</p>
<blockquote><ul>
<li>One app for your Mac, and one for your iPhone.</li>
<li>BlueLock automatically locks your Mac, when you walk away with your iPhone.</li>
<li>Once you come back, it unlocks your Mac.</li>
</ul>
</blockquote>
<p>Features</p>
<blockquote><ol>
<li>Simple: just a single button, which turns your iPhone into a key for your Mac.</li>
<li>Easy: fast connect, start the app on your Mac, click on one button in your iPhone to proceed.</li>
<li>No Worry: running in the background, you can turn off it from Background App Refresh.</li>
<li>Low Energy: Bluetooth 4.0, leave the app running all day long, cost lower power consumption than sending a single message.</li>
<li>Small Size: 500KB for iPhone and 1MB for the Mac, pretty much the smallest software among the similar section.</li>
</ol>
</blockquote>
<!-- more -->
<p><img src="http://dijkst.github.io/images/post/2015-02-14-bluelock-release-v1-dot-0-3/2.png"></p>
<p>Mac App <a href="http://dijkst.github.io/media/2015-02-14-bluelock-release-v1-dot-0-3/BlueLock.dmg">download</a></p>
<p>iPhone App <a href="https://itunes.apple.com/en/app/id958057367">AppStore</a></p>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[BlueLock Release v1.0.6]]></title>
<link href="http://dijkst.github.io/blog/2015/02/14/bluelock-release-v1-dot-0-3.cn/"/>
<updated>2015-02-14T13:35:00+08:00</updated>
<id>http://dijkst.github.io/blog/2015/02/14/bluelock-release-v1-dot-0-3.cn</id>
<content type="html"><![CDATA[<p>BlueLock 能够让你的 iPhone 变成 Mac 的钥匙：当离开的时候，自动锁定你的 Mac；当回到 Mac 前，会自动帮你输入解锁密码！</p>
<p>亮点：</p>
<blockquote><ol>
<li>简洁：无任何多余功能，iPhone 仅仅作为一个蓝牙钥匙，只有一个配对按钮；</li>
<li>方便：快速配对，只需启动 Mac 端配对功能，iPhone 即可一键配对；</li>
<li>省心：纯后台执行，不想用了，只需要从后台列表中关闭即可；</li>
<li>省电：采用蓝牙4.0技术，运行一天所消耗的电量比发送一条短信消耗的电量还低；</li>
<li>小巧：iPhone 端 500KB 、Mac 端 1MB 的体积使 BlueLock 成为目前同类软件中最小的一款。</li>
</ol>
</blockquote>
<!-- more -->
<p><img src="http://dijkst.github.io/images/post/2015-02-14-bluelock-release-v1-dot-0-3/1.png"></p>
<p>注意：</p>
<blockquote><ol>
<li>出于系统限制和安全考虑，手机重启或者长时间未使用手机，系统会关闭本功能，只需要再次执行一次 BlueLock 即可。</li>
<li>Mac 如果想立即锁定系统，需要到 系统偏好设置 –> 安全性与隐私 –> 通用，勾选 “进入睡眠或开始屏幕保护程序要求输入密码”，并选择“立即”要求输入密码。</li>
</ol>
</blockquote>
<p>Mac 端<a href="http://dijkst.github.io/media/2015-02-14-bluelock-release-v1-dot-0-3/BlueLock.dmg">点此下载</a></p>
<p>iPhone 端请点击右侧 App 图标下载，或者在 iPhone 的 AppStore 搜索 BlueLock。</p>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[让 Xcode 增加多 SDK 支持]]></title>
<link href="http://dijkst.github.io/blog/2014/09/29/rang-xcode-zeng-jia-duo-sdk-zhi-chi/"/>
<updated>2014-09-29T17:21:00+08:00</updated>
<id>http://dijkst.github.io/blog/2014/09/29/rang-xcode-zeng-jia-duo-sdk-zhi-chi</id>
<content type="html"><![CDATA[<p>Xcode 更新换代的时候，也就是 iOS 升级的时候，由于总总原因，可能需要对新的 iOS 做系统兼容，但是这个过程中，往往需要同时以旧的 Xcode 进行编译与发布。</p>
<p>这就出现一个比较头疼的问题——Xcode 共存！</p>
<p>由于 Xcode 是通过 AppStore 自动更新的，往往会覆盖旧版本的 Xcode。当然，我们可以在升级 Xcode 之前将 Xcode 复制出来一个备份，再升级。这样就有两个 Xcode 了！</p>
<p>突然想，编译本质上就是 SDK 不同，我们直接把旧版本的 SDK 放到新版本的 Xcode 里面不就可以了吗？</p>
<p>想到 Xcode 的 target 里面可以设置 <code>Base SDK</code>，默认不都是 <code>Latest SDK</code> 吗？下拉列表里面还真没有旧版本的 SDK，哪怕安装了旧版本的 Xcode。</p>
<p>于是到旧版本 Xcode 里面找到旧版本的 SDK，放到新版本的 Xcode，重启 Xcode，即可选择 SDK 版本啦！</p>
<p>SDK 路径： /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs</p>
<!-- more -->
<p><img src="http://dijkst.github.io/images/post/2014-09-29-rang-xcode-zeng-jia-duo-sdk-zhi-chi/1.png"></p>
<p>这种方法只适用于你安装了对应版本的模拟器。例如 Xcode6 里面不能安装 iOS6 模拟器，哪怕拿了 SDK6，也是不能用的。</p>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[在其他电脑上浏览 Time Machine 历史]]></title>
<link href="http://dijkst.github.io/blog/2014/06/25/zai-qi-ta-dian-nao-shang-liu-lan-time-machine-li-shi/"/>
<updated>2014-06-25T22:44:00+08:00</updated>
<id>http://dijkst.github.io/blog/2014/06/25/zai-qi-ta-dian-nao-shang-liu-lan-time-machine-li-shi</id>
<content type="html"><![CDATA[<p>Time Machine 一般总是在后台默默的运行，一般用得也比较少，就怕有时候用上还真挽回了一条命啊~</p>
<p>但是一直有一个疑问，换了一台 Mac，那如何去找原来那台上面的备份呢？</p>
<p>今天就给我遇上了，由于换了一台 MacBook，很多东西都没迁移过来，不想用还原的方式，想全新安装新的 Mac，于是出现或多或少遗漏一些数据迁移。经过一段时间后，旧 Mac 也处理了，因为觉得要的东西都差不多迁移完成了，但是往往不可预料的发现遗漏了。这时候就想访问原来的那台电脑的 Time Machine 备份磁盘。</p>
<p>可是如何让 Mac 访问另外一台电脑的磁盘呢？折腾了好久都没找到功能，一启动 Time Machine 就进入历史浏览，压根就没机会让我选择其他磁盘。</p>
<p>上网搜索了一下，官网有给出一个答复：<a href="https://discussions.apple.com/thread/1702971">How to access Time Machine from Another Computer?</a></p>
<p>试了一下，发现这个功能藏得可真深：</p>
<ul>
<li>先把 Time Machine 这个 APP 固定到 Dock 栏（任务栏），方法就是把 Finder 里面的 APP 拖到 Dock~</li>
<li>右击 Dock 上面的 Time Machine，选择<code>浏览其他 Time Machine 磁盘</code></li>
</ul>
<p>值得注意的是，由于不是自己的备份磁盘，存在访问权限问题，有些文件是访问不了的。因此我们平时文件尽可能存放在其他路径下，不要放在个人路径下。</p>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[SourceTree 中链接注释中的 issue id 到Kelude]]></title>
<link href="http://dijkst.github.io/blog/2014/05/30/sourcetree-zhong-lian-jie-zhu-shi-zhong-de-issue-id-dao-kelude/"/>
<updated>2014-05-30T16:30:00+08:00</updated>
<id>http://dijkst.github.io/blog/2014/05/30/sourcetree-zhong-lian-jie-zhu-shi-zhong-de-issue-id-dao-kelude</id>
<content type="html"><![CDATA[<p>Mac 上用 Git 时，SourceTree 简直就是非常方便的神器。</p>
<p>今天突发奇想，每次看到 git 的 commit message 里面有 fix #xxxxx 的时候，总是不知道到底修复的是啥。必须到 issue 里面去搜索 ID 才能找到，很少麻烦！</p>
<p>在 SourceTree 中逛了一圈，发现在项目的 Settings 中有一个 <code>Commit Text Replacements</code> 功能，很有可能是我正在找寻的~</p>
<p>上网搜索了一下，官方提供了说明：<a href="https://confluence.atlassian.com/display/SOURCETREEKB/Link+to+Bitbucket+issue+tracker+from+commits">Link to Bitbucket issue tracker from commits</a></p>
<p>经过测试，这里的 Replacements 功能并不是在提交的时候替换，而是在 SourceTree 显示注释的时候进行替换。因此并不会影响我们的最终提交~</p>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[GoAgent 提示 SSLError:EOF occurred in violation of protocol 解决办法]]></title>
<link href="http://dijkst.github.io/blog/2014/05/24/goagent-ti-shi-sslerror-eof-occurred-in-violation-of-protocol-jie-jue-ban-fa/"/>
<updated>2014-05-24T21:31:00+08:00</updated>
<id>http://dijkst.github.io/blog/2014/05/24/goagent-ti-shi-sslerror-eof-occurred-in-violation-of-protocol-jie-jue-ban-fa</id>
<content type="html"><![CDATA[<p>用 GoAgent 很长一段时间了，感觉好鸡肋，为啥，因为经常出现这个错误：</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>SSLError: [Errno 8] _ssl.c:504: EOF occurred in violation of protocol</span></code></pre></td></tr></table></div></figure>
<p>网上一搜一大把这个问题，就是没有解决的。</p>
<p>直接后果是大部分 https 的网站上不了！</p>
<p>今天无意中发现有人居然解决了：</p>
<p><a href="https://code.google.com/p/goagent/issues/detail?id=11385">https://code.google.com/p/goagent/issues/detail?id=11385</a></p>
<p>解决方法：</p>
<p>打开 keychain 把 GoAgent 证书从 login 移动到 system 里！</p>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[在 CALayer 上画线出现模糊的解决办法]]></title>
<link href="http://dijkst.github.io/blog/2014/05/23/zai-calayer-shang-hua-xian-chu-xian-mo-hu-de-jie-jue-ban-fa/"/>
<updated>2014-05-23T20:34:00+08:00</updated>
<id>http://dijkst.github.io/blog/2014/05/23/zai-calayer-shang-hua-xian-chu-xian-mo-hu-de-jie-jue-ban-fa</id>
<content type="html"><![CDATA[<p>iOS 原生的 CALayer 不支持设置四边其中一个边框，只能设置整个边框(border)，因此想到设置一个属性来自己画线。可是画出来的线总感觉很奇怪，同样是 width=1 的线，底部总感觉比左右边框更粗，也更模糊，而且不是总是这样的，仔细一看，好像 width 也差不多相同，就是虚了点，感觉多了一点像素。</p>
<!-- more -->
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
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<span class='line-number'>11</span>
<span class='line-number'>12</span>
<span class='line-number'>13</span>
<span class='line-number'>14</span>
<span class='line-number'>15</span>
<span class='line-number'>16</span>
<span class='line-number'>17</span>
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<span class='line-number'>19</span>
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<span class='line-number'>43</span>
<span class='line-number'>44</span>
<span class='line-number'>45</span>
<span class='line-number'>46</span>
<span class='line-number'>47</span>
<span class='line-number'>48</span>
<span class='line-number'>49</span>
<span class='line-number'>50</span>
<span class='line-number'>51</span>
<span class='line-number'>52</span>
</pre></td><td class='code'><pre><code class='objective-c'><span class='line'><span class="p">-</span> <span class="p">(</span><span class="kt">void</span><span class="p">)</span><span class="nf">drawInContext:</span><span class="p">(</span><span class="n">CGContextRef</span><span class="p">)</span><span class="nv">ctx</span> <span class="p">{</span>
</span><span class='line'> <span class="p">[</span><span class="nb">super</span> <span class="nl">drawInContext</span><span class="p">:</span><span class="n">ctx</span><span class="p">];</span>
</span><span class='line'>
</span><span class='line'> <span class="c1">// border left</span>
</span><span class='line'> <span class="p">[</span><span class="nb">self</span> <span class="nl">drawLineInContext</span><span class="p">:</span><span class="n">ctx</span>
</span><span class='line'> <span class="nl">fromX</span><span class="p">:</span><span class="mi">0</span>
</span><span class='line'> <span class="nl">fromY</span><span class="p">:</span><span class="mi">0</span>
</span><span class='line'> <span class="nl">toX</span><span class="p">:</span><span class="mi">0</span>
</span><span class='line'> <span class="nl">toY</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">bounds</span><span class="p">.</span><span class="n">size</span><span class="p">.</span><span class="n">height</span>
</span><span class='line'> <span class="nl">color</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">borderLeftColor</span>
</span><span class='line'> <span class="nl">width</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">borderLeftWidth</span><span class="p">];</span>
</span><span class='line'> <span class="c1">// border right</span>
</span><span class='line'> <span class="p">[</span><span class="nb">self</span> <span class="nl">drawLineInContext</span><span class="p">:</span><span class="n">ctx</span>
</span><span class='line'> <span class="nl">fromX</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">bounds</span><span class="p">.</span><span class="n">size</span><span class="p">.</span><span class="n">width</span> <span class="o">-</span> <span class="nb">self</span><span class="p">.</span><span class="n">borderBottomWidth</span>
</span><span class='line'> <span class="nl">fromY</span><span class="p">:</span><span class="mi">0</span>
</span><span class='line'> <span class="nl">toX</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">bounds</span><span class="p">.</span><span class="n">size</span><span class="p">.</span><span class="n">width</span> <span class="o">-</span> <span class="nb">self</span><span class="p">.</span><span class="n">borderBottomWidth</span>
</span><span class='line'> <span class="nl">toY</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">bounds</span><span class="p">.</span><span class="n">size</span><span class="p">.</span><span class="n">height</span>
</span><span class='line'> <span class="nl">color</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">borderRightColor</span>
</span><span class='line'> <span class="nl">width</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">borderRightWidth</span><span class="p">];</span>
</span><span class='line'> <span class="c1">// border top</span>
</span><span class='line'> <span class="p">[</span><span class="nb">self</span> <span class="nl">drawLineInContext</span><span class="p">:</span><span class="n">ctx</span>
</span><span class='line'> <span class="nl">fromX</span><span class="p">:</span><span class="mi">0</span>
</span><span class='line'> <span class="nl">fromY</span><span class="p">:</span><span class="mi">0</span>
</span><span class='line'> <span class="nl">toX</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">bounds</span><span class="p">.</span><span class="n">size</span><span class="p">.</span><span class="n">width</span>
</span><span class='line'> <span class="nl">toY</span><span class="p">:</span><span class="mi">0</span>
</span><span class='line'> <span class="nl">color</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">borderTopColor</span>
</span><span class='line'> <span class="nl">width</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">borderTopWidth</span><span class="p">];</span>
</span><span class='line'> <span class="c1">// border bottom</span>
</span><span class='line'> <span class="p">[</span><span class="nb">self</span> <span class="nl">drawLineInContext</span><span class="p">:</span><span class="n">ctx</span>
</span><span class='line'> <span class="nl">fromX</span><span class="p">:</span><span class="mi">0</span>
</span><span class='line'> <span class="nl">fromY</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">bounds</span><span class="p">.</span><span class="n">size</span><span class="p">.</span><span class="n">height</span> <span class="o">-</span> <span class="nb">self</span><span class="p">.</span><span class="n">borderBottomWidth</span>
</span><span class='line'> <span class="nl">toX</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">bounds</span><span class="p">.</span><span class="n">size</span><span class="p">.</span><span class="n">width</span>
</span><span class='line'> <span class="nl">toY</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">bounds</span><span class="p">.</span><span class="n">size</span><span class="p">.</span><span class="n">height</span> <span class="o">-</span> <span class="nb">self</span><span class="p">.</span><span class="n">borderBottomWidth</span>
</span><span class='line'> <span class="nl">color</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">borderBottomColor</span>
</span><span class='line'> <span class="nl">width</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">borderBottomWidth</span><span class="p">];</span>
</span><span class='line'><span class="p">}</span>
</span><span class='line'>
</span><span class='line'><span class="p">-</span> <span class="p">(</span><span class="kt">void</span><span class="p">)</span><span class="nf">drawLineInContext:</span><span class="p">(</span><span class="n">CGContextRef</span><span class="p">)</span><span class="nv">ref</span>
</span><span class='line'> <span class="nf">fromX:</span><span class="p">(</span><span class="n">CGFloat</span><span class="p">)</span><span class="nv">startX</span>
</span><span class='line'> <span class="nf">fromY:</span><span class="p">(</span><span class="n">CGFloat</span><span class="p">)</span><span class="nv">startY</span>
</span><span class='line'> <span class="nf">toX:</span><span class="p">(</span><span class="n">CGFloat</span><span class="p">)</span><span class="nv">targetX</span>
</span><span class='line'> <span class="nf">toY:</span><span class="p">(</span><span class="n">CGFloat</span><span class="p">)</span><span class="nv">targetY</span>
</span><span class='line'> <span class="nf">color:</span><span class="p">(</span><span class="bp">UIColor</span> <span class="o">*</span><span class="p">)</span><span class="nv">color</span>
</span><span class='line'> <span class="nf">width:</span><span class="p">(</span><span class="n">CGFloat</span><span class="p">)</span><span class="nv">width</span> <span class="p">{</span>
</span><span class='line'> <span class="k">if</span> <span class="p">(</span><span class="n">color</span> <span class="o">==</span> <span class="nb">nil</span> <span class="o">||</span> <span class="n">color</span> <span class="o">==</span> <span class="p">[</span><span class="bp">NSNull</span> <span class="k">class</span><span class="p">])</span>
</span><span class='line'> <span class="k">return</span><span class="p">;</span>
</span><span class='line'> <span class="n">CGContextMoveToPoint</span><span class="p">(</span><span class="n">ref</span><span class="p">,</span> <span class="n">startX</span><span class="p">,</span> <span class="n">startY</span><span class="p">);</span>
</span><span class='line'> <span class="n">CGContextAddLineToPoint</span><span class="p">(</span><span class="n">ref</span><span class="p">,</span> <span class="n">targetX</span><span class="p">,</span> <span class="n">targetY</span><span class="p">);</span>
</span><span class='line'> <span class="n">CGContextSetStrokeColorWithColor</span><span class="p">(</span><span class="n">ref</span><span class="p">,</span> <span class="n">color</span><span class="p">.</span><span class="bp">CGColor</span><span class="p">);</span>
</span><span class='line'> <span class="n">CGContextSetLineWidth</span><span class="p">(</span><span class="n">ref</span><span class="p">,</span> <span class="n">width</span><span class="p">);</span>
</span><span class='line'> <span class="n">CGContextStrokePath</span><span class="p">(</span><span class="n">ref</span><span class="p">);</span>
</span><span class='line'><span class="p">}</span>
</span></code></pre></td></tr></table></div></figure>
<p>网上搜索了一下，发现有人提出在代码前加这句：</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>CGContextSetShouldAntialias(context, NO)</span></code></pre></td></tr></table></div></figure>
<p>以前没用过，查了一下文档，得知是设置抗锯齿的，将抗锯齿功能关闭。试了一下，果然可以，但是，同时也发现了一点：边框不连接！也就是说，左边框超出了底边框！</p>
<p>我似乎有点头绪，可是到底是哪里不对劲却又说不上来！</p>
<p>首先抗锯齿功能可不是随便想关就关的，所以这个观点不能采纳！！</p>
<p>接着，左边框超出底边框，说明我底边框的 Y 值不准确！！</p>
<p>之前认为，画线时指明的 width 时，是向右向下延伸。看来原来理解错误了！</p>
<p>既然不是向右向下延伸，那就很有可能是向两边延伸了！</p>
<p>回头看 width=1 ，当我给它一个整形坐标时，向两边各自延伸 0.5，在抗锯齿中，可能出现 0.5 被虚化。</p>
<p>现在试着解决：</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
<span class='line-number'>6</span>
<span class='line-number'>7</span>
<span class='line-number'>8</span>
<span class='line-number'>9</span>
<span class='line-number'>10</span>
<span class='line-number'>11</span>
<span class='line-number'>12</span>
<span class='line-number'>13</span>
<span class='line-number'>14</span>
<span class='line-number'>15</span>
<span class='line-number'>16</span>
<span class='line-number'>17</span>
<span class='line-number'>18</span>
<span class='line-number'>19</span>
<span class='line-number'>20</span>
<span class='line-number'>21</span>
<span class='line-number'>22</span>
<span class='line-number'>23</span>
<span class='line-number'>24</span>
<span class='line-number'>25</span>
<span class='line-number'>26</span>
<span class='line-number'>27</span>
<span class='line-number'>28</span>
<span class='line-number'>29</span>
<span class='line-number'>30</span>
<span class='line-number'>31</span>
<span class='line-number'>32</span>
<span class='line-number'>33</span>
<span class='line-number'>34</span>
<span class='line-number'>35</span>
<span class='line-number'>36</span>
</pre></td><td class='code'><pre><code class='objective-c'><span class='line'><span class="p">-</span> <span class="p">(</span><span class="kt">void</span><span class="p">)</span><span class="nf">drawInContext:</span><span class="p">(</span><span class="n">CGContextRef</span><span class="p">)</span><span class="nv">ctx</span> <span class="p">{</span>
</span><span class='line'> <span class="p">[</span><span class="nb">super</span> <span class="nl">drawInContext</span><span class="p">:</span><span class="n">ctx</span><span class="p">];</span>
</span><span class='line'>
</span><span class='line'> <span class="c1">// border left</span>
</span><span class='line'> <span class="p">[</span><span class="nb">self</span> <span class="nl">drawLineInContext</span><span class="p">:</span><span class="n">ctx</span>
</span><span class='line'> <span class="nl">fromX</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">borderLeftWidth</span><span class="o">/</span><span class="mf">2.f</span>
</span><span class='line'> <span class="nl">fromY</span><span class="p">:</span><span class="mi">0</span>
</span><span class='line'> <span class="nl">toX</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">borderLeftWidth</span><span class="o">/</span><span class="mf">2.f</span>
</span><span class='line'> <span class="nl">toY</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">bounds</span><span class="p">.</span><span class="n">size</span><span class="p">.</span><span class="n">height</span>
</span><span class='line'> <span class="nl">color</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">borderLeftColor</span>
</span><span class='line'> <span class="nl">width</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">borderLeftWidth</span><span class="p">];</span>
</span><span class='line'> <span class="c1">// border right</span>
</span><span class='line'> <span class="p">[</span><span class="nb">self</span> <span class="nl">drawLineInContext</span><span class="p">:</span><span class="n">ctx</span>
</span><span class='line'> <span class="nl">fromX</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">bounds</span><span class="p">.</span><span class="n">size</span><span class="p">.</span><span class="n">width</span> <span class="o">-</span> <span class="nb">self</span><span class="p">.</span><span class="n">borderRightWidth</span><span class="o">/</span><span class="mf">2.f</span>
</span><span class='line'> <span class="nl">fromY</span><span class="p">:</span><span class="mi">0</span>
</span><span class='line'> <span class="nl">toX</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">bounds</span><span class="p">.</span><span class="n">size</span><span class="p">.</span><span class="n">width</span> <span class="o">-</span> <span class="nb">self</span><span class="p">.</span><span class="n">borderRightWidth</span><span class="o">/</span><span class="mf">2.f</span>
</span><span class='line'> <span class="nl">toY</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">bounds</span><span class="p">.</span><span class="n">size</span><span class="p">.</span><span class="n">height</span>
</span><span class='line'> <span class="nl">color</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">borderRightColor</span>
</span><span class='line'> <span class="nl">width</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">borderRightWidth</span><span class="p">];</span>
</span><span class='line'> <span class="c1">// border top</span>
</span><span class='line'> <span class="p">[</span><span class="nb">self</span> <span class="nl">drawLineInContext</span><span class="p">:</span><span class="n">ctx</span>
</span><span class='line'> <span class="nl">fromX</span><span class="p">:</span><span class="mi">0</span>
</span><span class='line'> <span class="nl">fromY</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">borderTopWidth</span><span class="o">/</span><span class="mf">2.f</span>
</span><span class='line'> <span class="nl">toX</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">bounds</span><span class="p">.</span><span class="n">size</span><span class="p">.</span><span class="n">width</span>
</span><span class='line'> <span class="nl">toY</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">borderTopWidth</span><span class="o">/</span><span class="mf">2.f</span>
</span><span class='line'> <span class="nl">color</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">borderTopColor</span>
</span><span class='line'> <span class="nl">width</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">borderTopWidth</span><span class="p">];</span>
</span><span class='line'> <span class="c1">// border bottom</span>
</span><span class='line'> <span class="p">[</span><span class="nb">self</span> <span class="nl">drawLineInContext</span><span class="p">:</span><span class="n">ctx</span>
</span><span class='line'> <span class="nl">fromX</span><span class="p">:</span><span class="mi">0</span>
</span><span class='line'> <span class="nl">fromY</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">bounds</span><span class="p">.</span><span class="n">size</span><span class="p">.</span><span class="n">height</span> <span class="o">-</span> <span class="nb">self</span><span class="p">.</span><span class="n">borderBottomWidth</span><span class="o">/</span><span class="mf">2.f</span>
</span><span class='line'> <span class="nl">toX</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">bounds</span><span class="p">.</span><span class="n">size</span><span class="p">.</span><span class="n">width</span>
</span><span class='line'> <span class="nl">toY</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">bounds</span><span class="p">.</span><span class="n">size</span><span class="p">.</span><span class="n">height</span> <span class="o">-</span> <span class="nb">self</span><span class="p">.</span><span class="n">borderBottomWidth</span><span class="o">/</span><span class="mf">2.f</span>
</span><span class='line'> <span class="nl">color</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">borderBottomColor</span>
</span><span class='line'> <span class="nl">width</span><span class="p">:</span><span class="nb">self</span><span class="p">.</span><span class="n">borderBottomWidth</span><span class="p">];</span>
</span><span class='line'><span class="p">}</span>
</span></code></pre></td></tr></table></div></figure>
<p>实践证明，正常了。</p>
<p>这里的前提是，size 的 width 和 height 都为整数，当为小数时，还是会出现模糊~</p>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[Git 同步远程 Tags]]></title>
<link href="http://dijkst.github.io/blog/2014/02/10/git-tong-bu-yuan-cheng-tags/"/>
<updated>2014-02-10T11:35:00+08:00</updated>
<id>http://dijkst.github.io/blog/2014/02/10/git-tong-bu-yuan-cheng-tags</id>
<content type="html"><![CDATA[<p>一个项目做久了，Tag 越来越多，大多时候也不怎么关心 Tag，只有需要找以前的版本才会翻查一下。</p>
<p>一不留神，发现服务器上的 Tag 好像被人整理了一下，而本地的 Tag 依然是老版本的，查了一下，似乎没有很好的方法保证服务器和本地的 tags 自动同步。</p>
<p>只好每个客户端自行本地清理自己的 tags 了：</p>
<p>git 1.7以上版本可以直接使用命令：</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>git fetch origin --prune --tags</span></code></pre></td></tr></table></div></figure>
<p>git 1.7及以下版本需要先删除所有 tags 再 fetch 一次：</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>git tag -l | xargs git tag -d
</span><span class='line'>git fetch</span></code></pre></td></tr></table></div></figure>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[在 iOS6 系统的 iPad 设备中打开 AppStore 下载页面]]></title>
<link href="http://dijkst.github.io/blog/2014/01/16/zai-ios6-xi-tong-de-ipad-she-bei-zhong-da-kai-appstore-xia-zai-ye-mian/"/>
<updated>2014-01-16T14:58:00+08:00</updated>
<id>http://dijkst.github.io/blog/2014/01/16/zai-ios6-xi-tong-de-ipad-she-bei-zhong-da-kai-appstore-xia-zai-ye-mian</id>
<content type="html"><![CDATA[<p>以前做 iPhone 的开发时，经常需要做一个功能，例如“更新 App”，点击之后跳转到 AppStore 的下载页面，然而，今天发现了一个问题：</p>
<p>我的跳转地址是 <code>itms-apps://itunes.apple.com/app/id438865278?mt=8</code>，这个地址是服务器返回的，我以前也是这么写的，应该没有问题。</p>
<p>测试的妹子说，在 iOS6 上面，该地址只能打开 AppStore 的首页，不能进入下载页面，在 iOS5 和 iOS7 中都正常，iOS6 所有设备均失败（iPad3、4、mini 等等）。</p>
<p>我尝试在 Safari 中输入该地址，发现也确实无法让 AppStore 进入下载界面。</p>
<p>在 iPhone 的 iOS6 中，正常。</p>
<p>因此估计是 iPad 的问题，上网搜了一下，发现这个问题是普遍存在的 —— 只在 iOS6 的 iPad 设备中出现！</p>
<!-- more -->
<p>参考地址： <a href="https://discussions.apple.com/thread/4420524?tstart=0">https://discussions.apple.com/thread/4420524?tstart=0</a></p>
<p><code>It apparently works with https, but http and itms-apps fail.</code></p>
<p>将 <code>itms-apps</code> 替换为 <code>https</code> 即可正常。</p>
<p>最后经过测试，使用 <code>https</code> 在 iPhone、iPad 上均可正常使用，不会跳转 Safari，完全不需要使用 <code>itms-apps</code>！</p>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[Octopress在zsh下无法新建博客的问题]]></title>
<link href="http://dijkst.github.io/blog/2013/12/07/octopresszai-zshxia-wu-fa-xin-jian-bo-ke-de-wen-ti/"/>
<updated>2013-12-07T23:27:00+08:00</updated>
<id>http://dijkst.github.io/blog/2013/12/07/octopresszai-zshxia-wu-fa-xin-jian-bo-ke-de-wen-ti</id>
<content type="html"><![CDATA[<p>转载自： <a href="http://fancyoung.com/blog/use-octopress-new-post-function-with-zsh/">http://fancyoung.com/blog/use-octopress-new-post-function-with-zsh/</a></p>
<p>执行：</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>$ rake new_post["arch-linux-reinstall-glibc.markdown"]`</span></code></pre></td></tr></table></div></figure>
<p>报错：</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>zsh: no matches found: new_post[arch-linux-reinstall-glibc]</span></code></pre></td></tr></table></div></figure>
<p>原因：zsh中若出现‘*’, ‘(’, ‘|’, ‘<’, ‘[’, or ‘?’符号，则将其识别为查找文件名的通配符</p>
<!-- more -->
<p>快速解决：用引号括起来</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>$ rake "new_post[arch-linux-reinstall-glibc.markdown]"</span></code></pre></td></tr></table></div></figure>
<p>彻底解决：取消zsh的通配(GLOB), 在<code>.zshrc</code>中加入 <code>alias rake="noglob rake"</code></p>
<p>PS：在 git 回滚操作</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>git reset --soft HEAD^</span></code></pre></td></tr></table></div></figure>
<p>出现报错：</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>zsh: no matches found HEAD^</span></code></pre></td></tr></table></div></figure>
<p>也为同样原因，因为<code>^</code>也为正则中的符号， 需要转义为</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>git reset --soft HEAD\^。</span></code></pre></td></tr></table></div></figure>
<h3>参考</h3>
<p><a href="https://github.com/imathis/octopress/issues/117">Not compatible with Zsh</a></p>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[不要在 Initializer 和 dealloc 方法中使用 setter 和 getter]]></title>
<link href="http://dijkst.github.io/blog/2013/12/07/bu-yao-zai-initializer-he-dealloc-fang-fa-zhong-shi-yong-setter-he-getter/"/>
<updated>2013-12-07T22:39:00+08:00</updated>
<id>http://dijkst.github.io/blog/2013/12/07/bu-yao-zai-initializer-he-dealloc-fang-fa-zhong-shi-yong-setter-he-getter</id>
<content type="html"><![CDATA[<p>今天和同事在争论 iOS 中，init 方法使用 <code>self.xxx = xx;</code> 是否合适的问题，以下面代码为导火索：</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
<span class='line-number'>6</span>
</pre></td><td class='code'><pre><code class='objective-c'><span class='line'> <span class="o">-</span> <span class="p">(</span><span class="kt">id</span><span class="p">)</span><span class="nl">initWithIconImage</span><span class="p">:(</span><span class="bp">UIImage</span> <span class="o">*</span><span class="p">)</span><span class="n">iconImage</span> <span class="nl">loadingImage</span><span class="p">:(</span><span class="bp">UIImage</span> <span class="o">*</span><span class="p">)</span><span class="n">loadingImage</span> <span class="p">{</span>
</span><span class='line'> <span class="k">if</span> <span class="p">(</span><span class="nb">self</span> <span class="o">=</span> <span class="p">[</span><span class="nb">self</span> <span class="n">init</span><span class="p">])</span> <span class="p">{</span>
</span><span class='line'> <span class="nb">self</span><span class="p">.</span><span class="n">iconImage</span> <span class="o">=</span> <span class="n">iconImage</span><span class="p">;</span>
</span><span class='line'> <span class="p">}</span>
</span><span class='line'> <span class="k">return</span> <span class="nb">self</span><span class="p">;</span>
</span><span class='line'> <span class="p">}</span>
</span></code></pre></td></tr></table></div></figure>
<p>他的观点是 <code>self.iconImage = iconImage;</code> 应该改为 <code>_iconImage = [iconImage retain];</code>，理由是担心内存被强制释放，那么 <code>self.iconImage = xxx</code> 将会导致崩溃。</p>
<p>我的观点是 <code>if (self = [self init])</code> 已经判断内存是否初始化正常了，不需要考虑 <code>self</code> 内存异常问题，所以不需要专门改成 <code>_iconImage = [iconImage retain];</code>，当然这么写也没错。</p>
<p>看似一个挺无聊的争论，但是最后一个技术专家站出来，贴了个 Apple 的文档： <a href="https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/MemoryMgmt/MemoryMgmt.pdf">Don’t Use Accessor Methods in Initializer Methods and dealloc</a></p>
<blockquote><p>The only places you shouldn’t use accessor methods to set an instance variable are in initializer methods and dealloc.</p></blockquote>
<p>看来我们争论的方向都错了，init 里面不用 setter 不是内存问题，而是<strong> setter 可能会触发其他的逻辑</strong>，例如重写的 setter 方法或者 KVC，将可能调用其他还没来得及 init 的变量，最终导致不可预计行为！</p>
<p>颠覆了以前的使用方法~~</p>
<p>不禁思考到其他语言，似乎都存在这种问题~~</p>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[Nagios4+Nginx+Ganglia配置]]></title>
<link href="http://dijkst.github.io/blog/2013/11/29/nagios4-plus-nginx-plus-gangliapei-zhi/"/>
<updated>2013-11-29T20:14:00+08:00</updated>
<id>http://dijkst.github.io/blog/2013/11/29/nagios4-plus-nginx-plus-gangliapei-zhi</id>
<content type="html"><![CDATA[<p>本文参考 <a href="http://idevit.nl/node/93">Nagios on nginx & Ubuntu 12.04</a></p>
<p>最近需要在服务器上配置一个Nagios用于检测服务器的异常情况并报警，我们的服务器已经搭建好Ganglia，Nagios主要用于报警通知。现在最新的Nagios的版本已经到了4.0.2, 而apt-get只有nagios3, 并且似乎还自动装了apache, 这不是我们需要的。看了一些资料后得知一般情况下 nagios 应该安装在 /usr/local/nagios 文件夹下，这样安装插件的时候会少很多麻烦。 而按照ubuntu的习惯，配置文件我决定放在 /etc/nagios 文件夹里。</p>
<p>首先介绍一下安装上面的配置需要了解的nagios的各个文件夹或者文件的用途</p>
<blockquote><p>/usr/local/nagios/libexec 是nagios插件存放的位置， nagios配置中有个USER1指的就是这个文件夹的路径<br/>
/etc/nagios/nagios.cfg 是nagios的主配置文件，它会引用到很多其它的配置文件，比如下面说到的objects文件夹下的所有配置<br/>
/etc/nagios/objects 文件夹里有可以配置命令的 commands.cfg 可以配置联系方式的 contacts.cfg<br/>
/etc/nagios/servers 这是我需要的一个文件夹，用于配置需要监控的服务的，需要在 /etc/nagios/nagios.cfg里取消掉相应行的注释</p></blockquote>
<h3>下面是我的安装配置过程</h3>
<h4>安装依赖</h4>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>apt-get install libperl-dev libpng12-dev libgd2-xpm-dev build-essential php5-gd wget libgd2-xpm</span></code></pre></td></tr></table></div></figure>
<!-- more -->
<h4>创建 nagios 用户， 和 nagcmd 用户组</h4>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>adduser --system --no-create-home --disabled-login --group nagios
</span><span class='line'>groupadd nagcmd
</span><span class='line'>usermod -G nagcmd nagios
</span><span class='line'>usermod -a -G nagcmd www-data</span></code></pre></td></tr></table></div></figure>
<h4>在一个临时文件夹下下载解压 nagios 源码以及插件源码， 最新的源码可以在 <a href="http://www.nagios.org/download/">nagios.org</a> 上找到</h4>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
<span class='line-number'>6</span>
<span class='line-number'>7</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>cd ~/tmp
</span><span class='line'>mkdir nagios
</span><span class='line'>cd nagios
</span><span class='line'>wget http://jaist.dl.sourceforge.net/project/nagios/nagios-4.x/nagios-4.0.2/nagios-4.0.2.tar.gz
</span><span class='line'>wget https://www.nagios-plugins.org/download/nagios-plugins-1.5.tar.gz
</span><span class='line'>tar xvf nagios-3.4.4.tar.gz
</span><span class='line'>tar xvf nagios-plugins-1.4.16.tar.gz</span></code></pre></td></tr></table></div></figure>
<h4>配置 nagios 源码并编译安装</h4>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
<span class='line-number'>6</span>
<span class='line-number'>7</span>
<span class='line-number'>8</span>
<span class='line-number'>9</span>
<span class='line-number'>10</span>
<span class='line-number'>11</span>
<span class='line-number'>12</span>
<span class='line-number'>13</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>cd ~/tmp/nagios/nagios-4.0.2
</span><span class='line'>
</span><span class='line'>./configure --prefix /usr/local/nagios \
</span><span class='line'>--sysconfdir=/etc/nagios \
</span><span class='line'>--with-nagios-user=nagios \
</span><span class='line'>--with-nagios-group=nagios \
</span><span class='line'>--with-command-user=nagios \
</span><span class='line'>--with-command-group=nagcmd
</span><span class='line'>
</span><span class='line'>make all
</span><span class='line'>make install
</span><span class='line'>make install-config
</span><span class='line'>make install-commandmode</span></code></pre></td></tr></table></div></figure>
<p>安装参考文章，需要 make install-init 的， 但我发现4.0.2版的 init 脚本用不了， 弄了好久最后在<a href="http://blacks3pt3mb3r.wordpress.com/tag/etcinit-dnagios-20-cant-open-etcrc-dinit-dfunctions/">All the geeky things</a> 这个博客里找到了一个稍微修改就可以使用的脚本。将它放到 /etc/init.d/nagios 即可</p>
<h4>设置网站登录密码，参考 <a href="http://idevit.nl/node/93">Nagios on nginx & Ubuntu 12.04</a></h4>
<h4>设置nagios的log的存放位置</h4>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>mkdir /var/log/nagios
</span><span class='line'>touch /var/log/nagios/nagios.log
</span><span class='line'>chown nagios:nagios /var/log/nagios
</span><span class='line'>vi /etc/nagios/nagios.cfg # 修改nagios.log的路径</span></code></pre></td></tr></table></div></figure>
<h4>安装插件, 插件将被安装在 /usr/local/nagios/libexec 里面</h4>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>cd ~/tmp/nagios/nagios-plugins-1.5
</span><span class='line'>./configure --with-nagios-user=nagios --with-nagios-group=nagios
</span><span class='line'>make && make install</span></code></pre></td></tr></table></div></figure>
<h4>测试nagios的配置，并设置开机启动</h4>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>/usr/local/nagios/bin/nagios -v /etc/nagios/nagios.cfg</span></code></pre></td></tr></table></div></figure>
<p>如果没有问题，会提示一切正常</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>chmod +x /etc/init.d/nagios
</span><span class='line'>update-rc.d -f nagios defaults</span></code></pre></td></tr></table></div></figure>
<p>到这里，只需要 service nagios start 就可以启动nagios了。想要在网页上看到nagios，需要安装nginx 和 fcgi</p>
<h4>安装 nginx & fcgi</h4>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>apt-get install nginx
</span><span class='line'>apt-get install spawn-fcgi fcgiwrap</span></code></pre></td></tr></table></div></figure>
<p>这时需要确认php-fpm监听的地址，从配置文件<code>/etc/php5/fpm/pool.d/www.conf</code>中可以找到, 假设为 <code>unix:/var/run/php5-fpm.sock</code><br/>
还需要确认<code>/var/run/fcgiwrap.socket</code>是否存在，如果不存在则要另外找出这个socket的位置</p>
<h4>配置 nginx 并启动</h4>
<p>这里并不设置密码（不是必须，但一般都要设置，参考<a href="http://idevit.nl/node/93">Nagios on nginx & Ubuntu 12.04</a>）</p>
<p>添加nginx配置</p>
<figure class='code'><figcaption><span>/etc/nginx/sites-available/nagios </span></figcaption>
<div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
<span class='line-number'>6</span>
<span class='line-number'>7</span>
<span class='line-number'>8</span>
<span class='line-number'>9</span>
<span class='line-number'>10</span>
<span class='line-number'>11</span>
<span class='line-number'>12</span>
<span class='line-number'>13</span>
<span class='line-number'>14</span>
<span class='line-number'>15</span>
<span class='line-number'>16</span>
<span class='line-number'>17</span>
<span class='line-number'>18</span>
<span class='line-number'>19</span>
<span class='line-number'>20</span>
<span class='line-number'>21</span>
<span class='line-number'>22</span>
<span class='line-number'>23</span>
<span class='line-number'>24</span>
<span class='line-number'>25</span>
<span class='line-number'>26</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>server {
</span><span class='line'> listen 9981;
</span><span class='line'> root /var/www/html;
</span><span class='line'> index index.html index.htm;
</span><span class='line'> server_name localhost;
</span><span class='line'>
</span><span class='line'> location /nagios {
</span><span class='line'> index index.php;
</span><span class='line'> alias /usr/local/nagios/share/;
</span><span class='line'> }
</span><span class='line'>
</span><span class='line'> location ~ ^/nagios/(.*\.php)$ {
</span><span class='line'> alias /usr/local/nagios/share/$1;
</span><span class='line'> include /etc/nginx/fastcgi_params;
</span><span class='line'> fastcgi_pass unix:/var/run/php5-fpm.sock;
</span><span class='line'> }
</span><span class='line'>
</span><span class='line'> location ~ \.cgi$ {
</span><span class='line'> root /usr/local/nagios/sbin/;
</span><span class='line'> rewrite ^/nagios/cgi-bin/(.*)\.cgi /$1.cgi break;
</span><span class='line'> fastcgi_param AUTH_USER $remote_user;
</span><span class='line'> fastcgi_param REMOTE_USER $remote_user;
</span><span class='line'> include /etc/nginx/fastcgi_params;
</span><span class='line'> fastcgi_pass unix:/var/run/fcgiwrap.socket;
</span><span class='line'> }
</span><span class='line'>}</span></code></pre></td></tr></table></div></figure>
<p>启动nginx <code>service nginx start</code>, 这时打开 <a href="http://localhost:9981/nagios">http://localhost:9981/nagios</a> 应该可以看到打开监控网页了。</p>
<h4>安装ganglia插件</h4>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>cd /usr/local/nagios/libexec/
</span><span class='line'>touch check_ganglia.py
</span><span class='line'>chown nagios:nagios check_ganglia.py
</span><span class='line'>chmod +x check_ganglia.py
</span><span class='line'>vi check_ganglia.py</span></code></pre></td></tr></table></div></figure>
<p>贴下面代码</p>
<figure class='code'><figcaption><span>/usr/local/nagios/libexec/check_ganglia.py </span></figcaption>
<div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
<span class='line-number'>6</span>
<span class='line-number'>7</span>
<span class='line-number'>8</span>
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</pre></td><td class='code'><pre><code class='py'><span class='line'><span class="c">#!/usr/bin/env python</span>
</span><span class='line'>
</span><span class='line'><span class="kn">import</span> <span class="nn">sys</span>
</span><span class='line'><span class="kn">import</span> <span class="nn">getopt</span>
</span><span class='line'><span class="kn">import</span> <span class="nn">socket</span>
</span><span class='line'><span class="kn">import</span> <span class="nn">xml.parsers.expat</span>
</span><span class='line'>
</span><span class='line'><span class="k">class</span> <span class="nc">GParser</span><span class="p">:</span>
</span><span class='line'> <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">host</span><span class="p">,</span> <span class="n">metric</span><span class="p">):</span>
</span><span class='line'> <span class="bp">self</span><span class="o">.</span><span class="n">inhost</span> <span class="o">=</span><span class="mi">0</span>
</span><span class='line'> <span class="bp">self</span><span class="o">.</span><span class="n">inmetric</span> <span class="o">=</span> <span class="mi">0</span>
</span><span class='line'> <span class="bp">self</span><span class="o">.</span><span class="n">value</span> <span class="o">=</span> <span class="bp">None</span>
</span><span class='line'> <span class="bp">self</span><span class="o">.</span><span class="n">host</span> <span class="o">=</span> <span class="n">host</span>
</span><span class='line'> <span class="bp">self</span><span class="o">.</span><span class="n">metric</span> <span class="o">=</span> <span class="n">metric</span>
</span><span class='line'>
</span><span class='line'> <span class="k">def</span> <span class="nf">parse</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="nb">file</span><span class="p">):</span>
</span><span class='line'> <span class="n">p</span> <span class="o">=</span> <span class="n">xml</span><span class="o">.</span><span class="n">parsers</span><span class="o">.</span><span class="n">expat</span><span class="o">.</span><span class="n">ParserCreate</span><span class="p">()</span>
</span><span class='line'> <span class="n">p</span><span class="o">.</span><span class="n">StartElementHandler</span> <span class="o">=</span> <span class="n">parser</span><span class="o">.</span><span class="n">start_element</span>
</span><span class='line'> <span class="n">p</span><span class="o">.</span><span class="n">EndElementHandler</span> <span class="o">=</span> <span class="n">parser</span><span class="o">.</span><span class="n">end_element</span>
</span><span class='line'> <span class="n">p</span><span class="o">.</span><span class="n">ParseFile</span><span class="p">(</span><span class="nb">file</span><span class="p">)</span>
</span><span class='line'> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">value</span> <span class="o">==</span> <span class="bp">None</span><span class="p">:</span>
</span><span class='line'> <span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s">'Host/value not found'</span><span class="p">)</span>
</span><span class='line'> <span class="k">return</span> <span class="nb">float</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">value</span><span class="p">)</span>
</span><span class='line'>
</span><span class='line'> <span class="k">def</span> <span class="nf">start_element</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">attrs</span><span class="p">):</span>
</span><span class='line'> <span class="k">if</span> <span class="n">name</span> <span class="o">==</span> <span class="s">"HOST"</span><span class="p">:</span>
</span><span class='line'> <span class="k">if</span> <span class="n">attrs</span><span class="p">[</span><span class="s">"NAME"</span><span class="p">]</span><span class="o">==</span><span class="bp">self</span><span class="o">.</span><span class="n">host</span><span class="p">:</span>
</span><span class='line'> <span class="bp">self</span><span class="o">.</span><span class="n">inhost</span><span class="o">=</span><span class="mi">1</span>
</span><span class='line'> <span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">inhost</span><span class="o">==</span><span class="mi">1</span> <span class="ow">and</span> <span class="n">name</span> <span class="o">==</span> <span class="s">"METRIC"</span> <span class="ow">and</span> <span class="n">attrs</span><span class="p">[</span><span class="s">"NAME"</span><span class="p">]</span><span class="o">==</span><span class="bp">self</span><span class="o">.</span><span class="n">metric</span><span class="p">:</span>
</span><span class='line'> <span class="bp">self</span><span class="o">.</span><span class="n">value</span><span class="o">=</span><span class="n">attrs</span><span class="p">[</span><span class="s">"VAL"</span><span class="p">]</span>
</span><span class='line'>
</span><span class='line'> <span class="k">def</span> <span class="nf">end_element</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span>
</span><span class='line'> <span class="k">if</span> <span class="n">name</span> <span class="o">==</span> <span class="s">"HOST"</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">inhost</span><span class="o">==</span><span class="mi">1</span><span class="p">:</span>
</span><span class='line'> <span class="bp">self</span><span class="o">.</span><span class="n">inhost</span><span class="o">=</span><span class="mi">0</span>
</span><span class='line'>
</span><span class='line'><span class="k">def</span> <span class="nf">usage</span><span class="p">():</span>
</span><span class='line'> <span class="k">print</span> <span class="s">"""Usage: check_ganglia </span><span class="se">\</span>
</span><span class='line'><span class="s">-h|--host= -m|--metric= -w|--warning= </span><span class="se">\</span>
</span><span class='line'><span class="s">-c|--critical= [-s|--server=] [-p|--port=] """</span>
</span><span class='line'> <span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span>
</span><span class='line'>
</span><span class='line'><span class="k">if</span> <span class="n">__name__</span> <span class="o">==</span> <span class="s">"__main__"</span><span class="p">:</span>
</span><span class='line'><span class="c">##############################################################</span>
</span><span class='line'> <span class="n">ganglia_host</span> <span class="o">=</span> <span class="s">'127.0.0.1'</span>
</span><span class='line'> <span class="n">ganglia_port</span> <span class="o">=</span> <span class="mi">8649</span>
</span><span class='line'> <span class="n">host</span> <span class="o">=</span> <span class="bp">None</span>
</span><span class='line'> <span class="n">metric</span> <span class="o">=</span> <span class="bp">None</span>
</span><span class='line'> <span class="n">warning</span> <span class="o">=</span> <span class="bp">None</span>
</span><span class='line'> <span class="n">critical</span> <span class="o">=</span> <span class="bp">None</span>
</span><span class='line'>
</span><span class='line'> <span class="k">try</span><span class="p">:</span>
</span><span class='line'> <span class="n">options</span><span class="p">,</span> <span class="n">args</span> <span class="o">=</span> <span class="n">getopt</span><span class="o">.</span><span class="n">getopt</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">1</span><span class="p">:],</span>
</span><span class='line'> <span class="s">"h:m:w:c:s:p:"</span><span class="p">,</span>
</span><span class='line'> <span class="p">[</span><span class="s">"host="</span><span class="p">,</span> <span class="s">"metric="</span><span class="p">,</span> <span class="s">"warning="</span><span class="p">,</span> <span class="s">"critical="</span><span class="p">,</span> <span class="s">"server="</span><span class="p">,</span> <span class="s">"port="</span><span class="p">],</span>
</span><span class='line'> <span class="p">)</span>
</span><span class='line'> <span class="k">except</span> <span class="n">getopt</span><span class="o">.</span><span class="n">GetoptError</span><span class="p">,</span> <span class="n">err</span><span class="p">:</span>
</span><span class='line'> <span class="k">print</span> <span class="s">"check_gmond:"</span><span class="p">,</span> <span class="nb">str</span><span class="p">(</span><span class="n">err</span><span class="p">)</span>
</span><span class='line'> <span class="n">usage</span><span class="p">()</span>
</span><span class='line'> <span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span>
</span><span class='line'>
</span><span class='line'> <span class="k">for</span> <span class="n">o</span><span class="p">,</span> <span class="n">a</span> <span class="ow">in</span> <span class="n">options</span><span class="p">:</span>
</span><span class='line'> <span class="k">if</span> <span class="n">o</span> <span class="ow">in</span> <span class="p">(</span><span class="s">"-h"</span><span class="p">,</span> <span class="s">"--host"</span><span class="p">):</span>
</span><span class='line'> <span class="n">host</span> <span class="o">=</span> <span class="n">a</span>
</span><span class='line'> <span class="k">elif</span> <span class="n">o</span> <span class="ow">in</span> <span class="p">(</span><span class="s">"-m"</span><span class="p">,</span> <span class="s">"--metric"</span><span class="p">):</span>
</span><span class='line'> <span class="n">metric</span> <span class="o">=</span> <span class="n">a</span>
</span><span class='line'> <span class="k">elif</span> <span class="n">o</span> <span class="ow">in</span> <span class="p">(</span><span class="s">"-w"</span><span class="p">,</span> <span class="s">"--warning"</span><span class="p">):</span>
</span><span class='line'> <span class="n">warning</span> <span class="o">=</span> <span class="nb">float</span><span class="p">(</span><span class="n">a</span><span class="p">)</span>
</span><span class='line'> <span class="k">elif</span> <span class="n">o</span> <span class="ow">in</span> <span class="p">(</span><span class="s">"-c"</span><span class="p">,</span> <span class="s">"--critical"</span><span class="p">):</span>
</span><span class='line'> <span class="n">critical</span> <span class="o">=</span> <span class="nb">float</span><span class="p">(</span><span class="n">a</span><span class="p">)</span>
</span><span class='line'> <span class="k">elif</span> <span class="n">o</span> <span class="ow">in</span> <span class="p">(</span><span class="s">"-p"</span><span class="p">,</span> <span class="s">"--port"</span><span class="p">):</span>
</span><span class='line'> <span class="n">ganglia_port</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">a</span><span class="p">)</span>
</span><span class='line'> <span class="k">elif</span> <span class="n">o</span> <span class="ow">in</span> <span class="p">(</span><span class="s">"-s"</span><span class="p">,</span> <span class="s">"--server"</span><span class="p">):</span>
</span><span class='line'> <span class="n">ganglia_host</span> <span class="o">=</span> <span class="n">a</span>
</span><span class='line'>
</span><span class='line'> <span class="k">if</span> <span class="n">critical</span> <span class="o">==</span> <span class="bp">None</span> <span class="ow">or</span> <span class="n">warning</span> <span class="o">==</span> <span class="bp">None</span> <span class="ow">or</span> <span class="n">metric</span> <span class="o">==</span> <span class="bp">None</span> <span class="ow">or</span> <span class="n">host</span> <span class="o">==</span> <span class="bp">None</span><span class="p">:</span>
</span><span class='line'> <span class="n">usage</span><span class="p">()</span>
</span><span class='line'> <span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span>
</span><span class='line'>
</span><span class='line'> <span class="k">try</span><span class="p">:</span>
</span><span class='line'> <span class="n">s</span> <span class="o">=</span> <span class="n">socket</span><span class="o">.</span><span class="n">socket</span><span class="p">(</span><span class="n">socket</span><span class="o">.</span><span class="n">AF_INET</span><span class="p">,</span> <span class="n">socket</span><span class="o">.</span><span class="n">SOCK_STREAM</span><span class="p">)</span>
</span><span class='line'> <span class="n">s</span><span class="o">.</span><span class="n">connect</span><span class="p">((</span><span class="n">ganglia_host</span><span class="p">,</span><span class="n">ganglia_port</span><span class="p">))</span>
</span><span class='line'> <span class="n">parser</span> <span class="o">=</span> <span class="n">GParser</span><span class="p">(</span><span class="n">host</span><span class="p">,</span> <span class="n">metric</span><span class="p">)</span>
</span><span class='line'> <span class="n">value</span> <span class="o">=</span> <span class="n">parser</span><span class="o">.</span><span class="n">parse</span><span class="p">(</span><span class="n">s</span><span class="o">.</span><span class="n">makefile</span><span class="p">(</span><span class="s">"r"</span><span class="p">))</span>
</span><span class='line'> <span class="n">s</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
</span><span class='line'> <span class="k">except</span> <span class="ne">Exception</span><span class="p">,</span> <span class="n">err</span><span class="p">:</span>
</span><span class='line'> <span class="k">print</span> <span class="s">"CHECKGANGLIA UNKNOWN: Error while getting value </span><span class="se">\"</span><span class="si">%s</span><span class="se">\"</span><span class="s">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">err</span><span class="p">)</span>
</span><span class='line'> <span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span>
</span><span class='line'>
</span><span class='line'> <span class="k">if</span> <span class="n">value</span> <span class="o">>=</span> <span class="n">critical</span><span class="p">:</span>
</span><span class='line'> <span class="k">print</span> <span class="s">"CHECKGANGLIA CRITICAL: </span><span class="si">%s</span><span class="s"> is </span><span class="si">%.2f</span><span class="s">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">metric</span><span class="p">,</span> <span class="n">value</span><span class="p">)</span>
</span><span class='line'> <span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
</span><span class='line'> <span class="k">elif</span> <span class="n">value</span> <span class="o">>=</span> <span class="n">warning</span><span class="p">:</span>
</span><span class='line'> <span class="k">print</span> <span class="s">"CHECKGANGLIA WARNING: </span><span class="si">%s</span><span class="s"> is </span><span class="si">%.2f</span><span class="s">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">metric</span><span class="p">,</span> <span class="n">value</span><span class="p">)</span>
</span><span class='line'> <span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
</span><span class='line'> <span class="k">else</span><span class="p">:</span>
</span><span class='line'> <span class="k">print</span> <span class="s">"CHECKGANGLIA OK: </span><span class="si">%s</span><span class="s"> is </span><span class="si">%.2f</span><span class="s">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">metric</span><span class="p">,</span> <span class="n">value</span><span class="p">)</span>
</span><span class='line'> <span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
</span></code></pre></td></tr></table></div></figure>
<p>在 <code>/etc/nagios/objects/commands.cfg</code> 添加上</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
</pre></td><td class='code'><pre><code class=''><span class='line'># check_ganglia
</span><span class='line'>define command {
</span><span class='line'> command_name check_ganglia
</span><span class='line'> command_line $USER1$/check_ganglia.py -h $HOSTNAME$ -m $ARG1$ -w $ARG2$ -c $ARG3$
</span><span class='line'>}</span></code></pre></td></tr></table></div></figure>
<h4>重启 nagios</h4>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>service nagios restart</span></code></pre></td></tr></table></div></figure>
<p>后面还需要配置nagios的service hosts hostgroups contacts， 这里不说了。have fun。</p>
<h4>附带 /etc/init.d/nagios</h4>