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<meta property="og:title" content="November, 2018" />
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<meta property="og:description" content="2018-11-01
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Finalize AReS Phase I and Phase II ToRs
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Send a note about my dspace-statistics-api to the dspace-tech mailing list
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2018-11-03
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Linode has been sending mails a few times a day recently that CGSpace (linode18) has had high CPU usage
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Today these are the top 10 IPs:
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<meta property="og:url" content="https://alanorth.github.io/cgspace-notes/2018-11/" /><meta property="article:published_time" content="2018-11-01T16:41:30+02:00"/>
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<meta name="twitter:title" content="November, 2018"/>
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<meta name="twitter:description" content="2018-11-01
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Finalize AReS Phase I and Phase II ToRs
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Send a note about my dspace-statistics-api to the dspace-tech mailing list
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2018-11-03
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Linode has been sending mails a few times a day recently that CGSpace (linode18) has had high CPU usage
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Today these are the top 10 IPs:
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"/>
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<title>November, 2018 | CGSpace Notes</title>
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<a class="nav-link " href="https://alanorth.github.io/cgspace-notes/">Home</a>
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<h1 class="blog-title"><a href="https://alanorth.github.io/cgspace-notes/" rel="home">CGSpace Notes</a></h1>
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<p class="lead blog-description">Documenting day-to-day work on the <a href="https://cgspace.cgiar.org">CGSpace</a> repository.</p>
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<h2 class="blog-post-title"><a href="https://alanorth.github.io/cgspace-notes/2018-11/">November, 2018</a></h2>
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<p class="blog-post-meta"><time datetime="2018-11-01T16:41:30+02:00">Thu Nov 01, 2018</time> by Alan Orth in
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<i class="fa fa-tag" aria-hidden="true"></i> <a href="/cgspace-notes/tags/notes" rel="tag">Notes</a>
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</p>
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</header>
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<h2 id="2018-11-01">2018-11-01</h2>
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<ul>
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<li>Finalize AReS Phase I and Phase II ToRs</li>
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<li>Send a note about my <a href="https://github.com/ilri/dspace-statistics-api">dspace-statistics-api</a> to the dspace-tech mailing list</li>
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</ul>
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<h2 id="2018-11-03">2018-11-03</h2>
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<ul>
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<li>Linode has been sending mails a few times a day recently that CGSpace (linode18) has had high CPU usage</li>
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<li>Today these are the top 10 IPs:</li>
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</ul>
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<p></p>
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<pre><code># zcat --force /var/log/nginx/*.log /var/log/nginx/*.log.1 | grep -E "03/Nov/2018" | awk '{print $1}' | sort | uniq -c | sort -n | tail -n 10
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1300 66.249.64.63
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1384 35.237.175.180
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1430 138.201.52.218
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1455 207.46.13.156
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1500 40.77.167.175
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1979 50.116.102.77
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2790 66.249.64.61
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3367 84.38.130.177
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4537 70.32.83.92
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22508 66.249.64.59
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</code></pre>
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<ul>
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<li>The <code>66.249.64.x</code> are definitely Google</li>
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<li><code>70.32.83.92</code> is well known, probably CCAFS or something, as it’s only a few thousand requests and always to REST API</li>
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<li><code>84.38.130.177</code> is some new IP in Latvia that is only hitting the XMLUI, using the following user agent:</li>
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</ul>
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<pre><code>Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.792.0 Safari/535.1
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</code></pre>
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<ul>
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<li>They at least seem to be re-using their Tomcat sessions:</li>
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</ul>
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<pre><code>$ grep -c -E 'session_id=[A-Z0-9]{32}:ip_addr=84.38.130.177' dspace.log.2018-11-03 | sort | uniq
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342
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</code></pre>
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<ul>
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<li><code>50.116.102.77</code> is also a regular REST API user</li>
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<li><code>40.77.167.175</code> and <code>207.46.13.156</code> seem to be Bing</li>
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<li><code>138.201.52.218</code> seems to be on Hetzner in Germany, but is using this user agent:</li>
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</ul>
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<pre><code>Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:62.0) Gecko/20100101 Firefox/62.0
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</code></pre>
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<ul>
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<li>And it doesn’t seem they are re-using their Tomcat sessions:</li>
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</ul>
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<pre><code>$ grep -c -E 'session_id=[A-Z0-9]{32}:ip_addr=138.201.52.218' dspace.log.2018-11-03 | sort | uniq
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1243
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</code></pre>
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<ul>
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<li>Ah, we’ve apparently seen this server exactly a year ago in 2017-11, making 40,000 requests in one day…</li>
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<li>I wonder if it’s worth adding them to the list of bots in the nginx config?</li>
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<li>Linode sent a mail that CGSpace (linode18) is using high outgoing bandwidth</li>
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<li>Looking at the nginx logs again I see the following top ten IPs:</li>
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</ul>
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<pre><code># zcat --force /var/log/nginx/*.log /var/log/nginx/*.log.1 | grep -E "03/Nov/2018" | awk '{print $1}' | sort | uniq -c | sort -n | tail -n 10
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1979 50.116.102.77
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1980 35.237.175.180
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2186 207.46.13.156
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2208 40.77.167.175
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2843 66.249.64.63
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4220 84.38.130.177
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4537 70.32.83.92
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5593 66.249.64.61
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12557 78.46.89.18
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32152 66.249.64.59
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</code></pre>
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<ul>
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<li><code>78.46.89.18</code> is new since I last checked a few hours ago, and it’s from Hetzner with the following user agent:</li>
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</ul>
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<pre><code>Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:62.0) Gecko/20100101 Firefox/62.0
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</code></pre>
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<ul>
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<li>It’s making lots of requests and using quite a number of Tomcat sessions:</li>
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</ul>
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<pre><code>$ grep -c -E 'session_id=[A-Z0-9]{32}:ip_addr=78.46.89.18' /home/cgspace.cgiar.org/log/dspace.log.2018-11-03 | sort | uniq
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8449
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</code></pre>
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<ul>
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<li>I could add this IP to the list of bot IPs in nginx, but it seems like a futile effort when some new IP could come along and do the same thing</li>
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<li>Perhaps I should think about adding rate limits to dynamic pages like <code>/discover</code> and <code>/browse</code></li>
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<li>I think it’s reasonable for a human to click one of those links five or ten times a minute…</li>
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<li>To contrast, <code>78.46.89.18</code> made about 300 requests per minute for a few hours today:</li>
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</ul>
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<pre><code># grep 78.46.89.18 /var/log/nginx/access.log | grep -o -E '03/Nov/2018:[0-9][0-9]:[0-9][0-9]' | sort | uniq -c | sort -n | tail -n 20
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286 03/Nov/2018:18:02
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287 03/Nov/2018:18:21
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289 03/Nov/2018:18:23
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291 03/Nov/2018:18:27
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293 03/Nov/2018:18:34
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300 03/Nov/2018:17:58
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300 03/Nov/2018:18:22
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300 03/Nov/2018:18:32
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304 03/Nov/2018:18:12
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305 03/Nov/2018:18:13
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305 03/Nov/2018:18:24
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312 03/Nov/2018:18:39
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322 03/Nov/2018:18:17
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326 03/Nov/2018:18:38
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327 03/Nov/2018:18:16
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330 03/Nov/2018:17:57
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332 03/Nov/2018:18:19
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336 03/Nov/2018:17:56
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340 03/Nov/2018:18:14
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341 03/Nov/2018:18:18
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</code></pre>
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<ul>
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<li>If they want to download all our metadata and PDFs they should use an API rather than scraping the XMLUI</li>
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<li>I will add them to the list of bot IPs in nginx for now and think about enforcing rate limits in XMLUI later</li>
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<li>Also, this is the third (?) time a mysterious IP in Hetzner has done this… who is this?</li>
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</ul>
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<!-- vim: set sw=2 ts=2: -->
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</article>
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</div> <!-- /.blog-main -->
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<aside class="col-sm-3 ml-auto blog-sidebar">
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<section class="sidebar-module">
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<h4>Recent Posts</h4>
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<ol class="list-unstyled">
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<li><a href="/cgspace-notes/2018-11/">November, 2018</a></li>
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<li><a href="/cgspace-notes/2018-10/">October, 2018</a></li>
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<li><a href="/cgspace-notes/2018-09/">September, 2018</a></li>
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<li><a href="/cgspace-notes/2018-08/">August, 2018</a></li>
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<li><a href="/cgspace-notes/2018-07/">July, 2018</a></li>
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</ol>
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</section>
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<section class="sidebar-module">
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<h4>Links</h4>
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<ol class="list-unstyled">
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<li><a href="https://cgspace.cgiar.org">CGSpace</a></li>
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<li><a href="https://dspacetest.cgiar.org">DSpace Test</a></li>
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<li><a href="https://github.com/ilri/DSpace">CGSpace @ GitHub</a></li>
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</ol>
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</section>
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