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#27848

Bash

Monitor your swap

#!/bin/bash
# Notify me one time if my swap is over MAXSWAP and log the 
# swap usage as well.
# Usage: ./monitor.sh &

SWAPLOG=~/monitor/swap
MAXSWAP=5

send_sms_msg () {
  if [ "$1" ]; then STRING=$1; fi
  if [ $SMS_SENT ]; then
    return 0
  else
    echo $STRING | mailx -s 'monitor msg' 5101234567@cingularme.com
    SMS_SENT=1
  fi
}

while true; do
    # parse free output, get current swap value
    swaptest=`free -m |grep Swap|perl -pe 's/Swap:\s+\S+\s+(\S+).*/$1/'`
    if [ $swaptest -ge $MAXSWAP ]; then
        echo `date` Swap is: $swaptest >> $SWAPLOG
        send_sms_msg "Swap is: $swaptest"
    fi;
    sleep 30
done;
https://snipt.net/embed/d087d71b9e064d961cfbc68931063d93/
https://snipt.net/raw/d087d71b9e064d961cfbc68931063d93/
d087d71b9e064d961cfbc68931063d93
bash
Bash
28
2014-04-18T19:54:05
True
False
/api/public/snipt/27848/
monitor-your-swap
<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><a href="#L-1"> 1</a> <a href="#L-2"> 2</a> <a href="#L-3"> 3</a> <a href="#L-4"> 4</a> <a href="#L-5"> 5</a> <a href="#L-6"> 6</a> <a href="#L-7"> 7</a> <a href="#L-8"> 8</a> <a href="#L-9"> 9</a> <a href="#L-10">10</a> <a href="#L-11">11</a> <a href="#L-12">12</a> <a href="#L-13">13</a> <a href="#L-14">14</a> <a href="#L-15">15</a> <a href="#L-16">16</a> <a href="#L-17">17</a> <a href="#L-18">18</a> <a href="#L-19">19</a> <a href="#L-20">20</a> <a href="#L-21">21</a> <a href="#L-22">22</a> <a href="#L-23">23</a> <a href="#L-24">24</a> <a href="#L-25">25</a> <a href="#L-26">26</a> <a href="#L-27">27</a></pre></div></td><td class="code"><div class="highlight"><pre><span id="L-1"><a name="L-1"></a><span class="c">#!/bin/bash</span> </span><span id="L-2"><a name="L-2"></a><span class="c"># Notify me one time if my swap is over MAXSWAP and log the </span> </span><span id="L-3"><a name="L-3"></a><span class="c"># swap usage as well.</span> </span><span id="L-4"><a name="L-4"></a><span class="c"># Usage: ./monitor.sh &amp;</span> </span><span id="L-5"><a name="L-5"></a> </span><span id="L-6"><a name="L-6"></a><span class="nv">SWAPLOG</span><span class="o">=</span>~/monitor/swap </span><span id="L-7"><a name="L-7"></a><span class="nv">MAXSWAP</span><span class="o">=</span>5 </span><span id="L-8"><a name="L-8"></a> </span><span id="L-9"><a name="L-9"></a>send_sms_msg <span class="o">()</span> <span class="o">{</span> </span><span id="L-10"><a name="L-10"></a> <span class="k">if</span> <span class="o">[</span> <span class="s2">&quot;$1&quot;</span> <span class="o">]</span><span class="p">;</span> <span class="k">then </span><span class="nv">STRING</span><span class="o">=</span><span class="nv">$1</span><span class="p">;</span> <span class="k">fi</span> </span><span id="L-11"><a name="L-11"></a><span class="k"> if</span> <span class="o">[</span> <span class="nv">$SMS_SENT</span> <span class="o">]</span><span class="p">;</span> <span class="k">then</span> </span><span id="L-12"><a name="L-12"></a><span class="k"> return </span>0 </span><span id="L-13"><a name="L-13"></a> <span class="k">else</span> </span><span id="L-14"><a name="L-14"></a><span class="k"> </span><span class="nb">echo</span> <span class="nv">$STRING</span> <span class="p">|</span> mailx -s <span class="s1">&#39;monitor msg&#39;</span> 5101234567@cingularme.com </span><span id="L-15"><a name="L-15"></a> <span class="nv">SMS_SENT</span><span class="o">=</span>1 </span><span id="L-16"><a name="L-16"></a> <span class="k">fi</span> </span><span id="L-17"><a name="L-17"></a><span class="o">}</span> </span><span id="L-18"><a name="L-18"></a> </span><span id="L-19"><a name="L-19"></a><span class="k">while </span><span class="nb">true</span><span class="p">;</span> <span class="k">do</span> </span><span id="L-20"><a name="L-20"></a> <span class="c"># parse free output, get current swap value</span> </span><span id="L-21"><a name="L-21"></a> <span class="nv">swaptest</span><span class="o">=</span><span class="sb">`</span>free -m <span class="p">|</span>grep Swap<span class="p">|</span>perl -pe <span class="s1">&#39;s/Swap:\s+\S+\s+(\S+).*/$1/&#39;</span><span class="sb">`</span> </span><span id="L-22"><a name="L-22"></a> <span class="k">if</span> <span class="o">[</span> <span class="nv">$swaptest</span> -ge <span class="nv">$MAXSWAP</span> <span class="o">]</span><span class="p">;</span> <span class="k">then</span> </span><span id="L-23"><a name="L-23"></a><span class="k"> </span><span class="nb">echo</span> <span class="sb">`</span>date<span class="sb">`</span> Swap is: <span class="nv">$swaptest</span> &gt;&gt; <span class="nv">$SWAPLOG</span> </span><span id="L-24"><a name="L-24"></a> send_sms_msg <span class="s2">&quot;Swap is: $swaptest&quot;</span> </span><span id="L-25"><a name="L-25"></a> <span class="k">fi</span><span class="p">;</span> </span><span id="L-26"><a name="L-26"></a> sleep 30 </span><span id="L-27"><a name="L-27"></a><span class="k">done</span><span class="p">;</span> </span></pre></div> </td></tr></table>
monitoring, sysadmin