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Linode has alerted a few times since last night that the CPU usage on CGSpace (linode18) was high despite me increasing the alert threshold last week from 250% to 275%—I might need to increase it again!
The top IPs before, during, and after this latest alert tonight were:


# zcat --force /var/log/nginx/*.log /var/log/nginx/*.log.1 | grep -E &quot;01/Feb/2019:(17|18|19|20|21)&quot; | awk &#39;{print $1}&#39; | sort | uniq -c | sort -n | tail -n 10
    245 207.46.13.5
    332 54.70.40.11
    385 5.143.231.38
    405 207.46.13.173
    405 207.46.13.75
   1117 66.249.66.219
   1121 35.237.175.180
   1546 5.9.6.51
   2474 45.5.186.2
   5490 85.25.237.71


85.25.237.71 is the &ldquo;Linguee Bot&rdquo; that I first saw last month
The Solr statistics the past few months have been very high and I was wondering if the web server logs also showed an increase
There were just over 3 million accesses in the nginx logs last month:


# time zcat --force /var/log/nginx/* | grep -cE &quot;[0-9]{1,2}/Jan/2019&quot;
3018243

real    0m19.873s
user    0m22.203s
sys     0m1.979s
" />
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Linode has alerted a few times since last night that the CPU usage on CGSpace (linode18) was high despite me increasing the alert threshold last week from 250% to 275%—I might need to increase it again!
The top IPs before, during, and after this latest alert tonight were:


# zcat --force /var/log/nginx/*.log /var/log/nginx/*.log.1 | grep -E &quot;01/Feb/2019:(17|18|19|20|21)&quot; | awk &#39;{print $1}&#39; | sort | uniq -c | sort -n | tail -n 10
    245 207.46.13.5
    332 54.70.40.11
    385 5.143.231.38
    405 207.46.13.173
    405 207.46.13.75
   1117 66.249.66.219
   1121 35.237.175.180
   1546 5.9.6.51
   2474 45.5.186.2
   5490 85.25.237.71


85.25.237.71 is the &ldquo;Linguee Bot&rdquo; that I first saw last month
The Solr statistics the past few months have been very high and I was wondering if the web server logs also showed an increase
There were just over 3 million accesses in the nginx logs last month:


# time zcat --force /var/log/nginx/* | grep -cE &quot;[0-9]{1,2}/Jan/2019&quot;
3018243

real    0m19.873s
user    0m22.203s
sys     0m1.979s
"/>
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    <h2 class="blog-post-title"><a href="https://alanorth.github.io/cgspace-notes/2019-02/">February, 2019</a></h2>
    <p class="blog-post-meta"><time datetime="2019-02-01T21:37:30&#43;02:00">Fri Feb 01, 2019</time> by Alan Orth in 

<i class="fa fa-tag" aria-hidden="true"></i>&nbsp;<a href="/cgspace-notes/tags/notes" rel="tag">Notes</a>

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  <h2 id="2019-02-01">2019-02-01</h2>

<ul>
<li>Linode has alerted a few times since last night that the CPU usage on CGSpace (linode18) was high despite me increasing the alert threshold last week from 250% to 275%—I might need to increase it again!</li>
<li>The top IPs before, during, and after this latest alert tonight were:</li>
</ul>

<pre><code># zcat --force /var/log/nginx/*.log /var/log/nginx/*.log.1 | grep -E &quot;01/Feb/2019:(17|18|19|20|21)&quot; | awk '{print $1}' | sort | uniq -c | sort -n | tail -n 10
    245 207.46.13.5
    332 54.70.40.11
    385 5.143.231.38
    405 207.46.13.173
    405 207.46.13.75
   1117 66.249.66.219
   1121 35.237.175.180
   1546 5.9.6.51
   2474 45.5.186.2
   5490 85.25.237.71
</code></pre>

<ul>
<li><code>85.25.237.71</code> is the &ldquo;Linguee Bot&rdquo; that I first saw last month</li>
<li>The Solr statistics the past few months have been very high and I was wondering if the web server logs also showed an increase</li>
<li>There were just over 3 million accesses in the nginx logs last month:</li>
</ul>

<pre><code># time zcat --force /var/log/nginx/* | grep -cE &quot;[0-9]{1,2}/Jan/2019&quot;
3018243

real    0m19.873s
user    0m22.203s
sys     0m1.979s
</code></pre>

<ul>
<li>Normally I&rsquo;d say this was very high, but <a href="/cgspace-notes/2018-02/">about this time last year</a> I remember thinking the same thing when we had 3.1 million&hellip;</li>
<li>I will have to keep an eye on this to see if there is some error in Solr&hellip;</li>
<li>Atmire sent their <a href="https://github.com/ilri/DSpace/pull/407">pull request to re-enable the Metadata Quality Module (MQM) on our <code>5_x-dev</code> branch</a> today

<ul>
<li>I will test it next week and send them feedback</li>
</ul></li>
</ul>

<h2 id="2019-02-02">2019-02-02</h2>

<ul>
<li>Another alert from Linode about CGSpace (linode18) this morning, here are the top IPs in the web server logs before, during, and after that time:</li>
</ul>

<pre><code># zcat --force /var/log/nginx/*.log /var/log/nginx/*.log.1 | grep -E &quot;02/Feb/2019:0(1|2|3|4|5)&quot; | awk '{print $1}' | sort | uniq -c | sort -n | tail -n 10
    284 18.195.78.144
    329 207.46.13.32
    417 35.237.175.180
    448 34.218.226.147
    694 2a01:4f8:13b:1296::2
    718 2a01:4f8:140:3192::2
    786 137.108.70.14
   1002 5.9.6.51
   6077 85.25.237.71
   8726 45.5.184.2
</code></pre>

<ul>
<li><code>45.5.184.2</code> is CIAT and <code>85.25.237.71</code> is the new Linguee bot that I first noticed a few days ago</li>
<li>I will increase the Linode alert threshold from 275 to 300% because this is becoming too much!</li>
<li>I tested the Atmire Metadata Quality Module (MQM)&rsquo;s duplicate checked on the some <a href="https://dspacetest.cgiar.org/handle/10568/81268">WLE items</a> that I helped Udana with a few months ago on DSpace Test (linode19) and indeed it found many duplicates!</li>
</ul>

<h2 id="2019-02-03">2019-02-03</h2>

<ul>
<li>This is seriously getting annoying, Linode sent another alert this morning that CGSpace (linode18) load was 377%!</li>
<li>Here are the top IPs before, during, and after that time:</li>
</ul>

<pre><code># zcat --force /var/log/nginx/*.log /var/log/nginx/*.log.1 | grep -E &quot;03/Feb/2019:0(5|6|7|8|9)&quot; | awk '{print $1}' | sort | uniq -c | sort -n | tail -n 10
    325 85.25.237.71
    340 45.5.184.72
    431 5.143.231.8
    756 5.9.6.51
   1048 34.218.226.147
   1203 66.249.66.219
   1496 195.201.104.240
   4658 205.186.128.185
   4658 70.32.83.92
   4852 45.5.184.2
</code></pre>

<ul>
<li><code>45.5.184.2</code> is CIAT, <code>70.32.83.92</code> and <code>205.186.128.185</code> are Macaroni Bros harvesters for CCAFS I think</li>
<li><code>195.201.104.240</code> is a new IP address in Germany with the following user agent:</li>
</ul>

<pre><code>Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:62.0) Gecko/20100101 Firefox/62.0
</code></pre>

<ul>
<li>This user was making 20–60 requests per minute this morning&hellip; seems like I should try to block this type of behavior heuristically, regardless of user agent!</li>
</ul>

<pre><code># zcat --force /var/log/nginx/*.log /var/log/nginx/*.log.1 | grep -E &quot;03/Feb/2019&quot; | grep 195.201.104.240 | grep -o -E '03/Feb/2019:0[0-9]:[0-9][0-9]' | uniq -c | sort -n | tail -n 20
     19 03/Feb/2019:07:42
     20 03/Feb/2019:07:12
     21 03/Feb/2019:07:27
     21 03/Feb/2019:07:28
     25 03/Feb/2019:07:23
     25 03/Feb/2019:07:29
     26 03/Feb/2019:07:33
     28 03/Feb/2019:07:38
     30 03/Feb/2019:07:31
     33 03/Feb/2019:07:35
     33 03/Feb/2019:07:37
     38 03/Feb/2019:07:40
     43 03/Feb/2019:07:24
     43 03/Feb/2019:07:32
     46 03/Feb/2019:07:36
     47 03/Feb/2019:07:34
     47 03/Feb/2019:07:39
     47 03/Feb/2019:07:41
     51 03/Feb/2019:07:26
     59 03/Feb/2019:07:25
</code></pre>

<ul>
<li>At least they re-used their Tomcat session!</li>
</ul>

<pre><code>$ grep -o -E 'session_id=[A-Z0-9]{32}:ip_addr=195.201.104.240' dspace.log.2019-02-03 | sort | uniq | wc -l
1
</code></pre>

<ul>
<li>This user was making requests to <code>/browse</code>, which is not currently under the existing rate limiting of dynamic pages in our nginx config

<ul>
<li>I <a href="https://github.com/ilri/rmg-ansible-public/commit/36dfb072d6724fb5cdc81ef79cab08ed9ce427ad">extended the existing <code>dynamicpages</code> (12/m) rate limit to <code>/browse</code> and <code>/discover</code></a> with an allowance for bursting of up to five requests for &ldquo;real&rdquo; users</li>
</ul></li>
</ul>

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<li><a href="/cgspace-notes/2019-02/">February, 2019</a></li>

<li><a href="/cgspace-notes/2019-01/">January, 2019</a></li>

<li><a href="/cgspace-notes/2018-12/">December, 2018</a></li>

<li><a href="/cgspace-notes/2018-11/">November, 2018</a></li>

<li><a href="/cgspace-notes/2018-10/">October, 2018</a></li>

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