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<p>You cannot modify <span style="font-size: small;"><span style="font-family: verdana,sans-serif;">/proc/3070/limits without root permissions.<br /></span></span></p>
<p><span style="font-size: small;"><span style="font-family: verdana,sans-serif;">Try:</span></span></p>
<p><span style="font-family: courier new,courier,monospace;">###<br />sudo su -<br /><span style="font-size: small;">echo -n "Max open files=8192:unlimited" > /proc/3070/limits</span><br />###</span></p>
<p>El 2016-12-19 19:21, John Petrini escribió:</p>
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<div dir="ltr">Hi Prashant,
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<div>On second thought that trick might only work on CentOS. You might have success using prlimit instead.</div>
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<div class="gmail_quote">On Mon, Dec 19, 2016 at 1:13 PM, Prashant Shetty <span><<a href="mailto:prashantshetty1985@gmail.com">prashantshetty1985@gmail.com</a>></span> wrote:<br />
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<div><span style="font-size: small;"><span style="font-family: verdana,sans-serif;">Hi John,<br /><br /></span></span></div>
<span style="font-size: small;"><span style="font-family: verdana,sans-serif;">Echo option doesnt seems to work on below controller.<br /><br />stack@devstackvm:~$ cat /etc/lsb-release <br />DISTRIB_ID=Ubuntu<br />DISTRIB_RELEASE=14.04<br />DISTRIB_CODENAME=trusty<br />DISTRIB_DESCRIPTION="Ubuntu 14.04.5 LTS"<br />stack@devstackvm:~$ <br /><br />stack@devstackvm:~$ ps aux | grep nova-api<br />stack 3070 1.1 0.1 271576 121092 pts/9 S+ Dec16 50:29 /usr/bin/python /usr/local/bin/nova-api<br />stack 3079 0.3 0.8 1045308 881676 pts/9 S+ Dec16 14:32 /usr/bin/python /usr/local/bin/nova-api<br />stack 3080 0.2 0.1 324808 161096 pts/9 S+ Dec16 9:25 /usr/bin/python /usr/local/bin/nova-api<br />stack 3081 0.2 0.7 980172 816468 pts/9 S+ Dec16 10:37 /usr/bin/python /usr/local/bin/nova-api<br />stack 3082 0.3 0.1 336824 173288 pts/9 S+ Dec16 16:11 /usr/bin/python /usr/local/bin/nova-api<br />stack 3083 0.4 0.1 338788 175264 pts/9 S+ Dec16 19:05 /usr/bin/python /usr/local/bin/nova-api<br />stack 3084 0.4 0.1 336616 172912 pts/9 S+ Dec16 17:41 /usr/bin/python /usr/local/bin/nova-api<br />stack 3085 0.2 0.8 1054900 891272 pts/9 S+ Dec16 10:09 /usr/bin/python /usr/local/bin/nova-api<br />stack 3086 0.2 0.1 325088 161228 pts/9 S+ Dec16 9:59 /usr/bin/python /usr/local/bin/nova-api<br />stack 3097 0.2 0.1 308088 151828 pts/9 S+ Dec16 11:10 /usr/bin/python /usr/local/bin/nova-api<br />stack 3098 0.2 0.1 308296 152360 pts/9 S+ Dec16 11:15 /usr/bin/python /usr/local/bin/nova-api<br />stack 3099 0.2 0.1 308708 152544 pts/9 S+ Dec16 11:42 /usr/bin/python /usr/local/bin/nova-api<br />stack 3100 0.2 0.1 309588 153624 pts/9 S+ Dec16 11:06 /usr/bin/python /usr/local/bin/nova-api<br />stack 3101 0.2 0.1 308372 152396 pts/9 S+ Dec16 11:14 /usr/bin/python /usr/local/bin/nova-api<br />stack 3102 0.2 0.1 308084 152052 pts/9 S+ Dec16 11:10 /usr/bin/python /usr/local/bin/nova-api<br />stack 3103 0.2 0.1 308380 152416 pts/9 S+ Dec16 11:09 /usr/bin/python /usr/local/bin/nova-api<br />stack 3104 0.2 0.1 307652 151560 pts/9 S+ Dec16 10:29 /usr/bin/python /usr/local/bin/nova-api<br />stack 8087 0.0 0.0 11752 2044 pts/21 S+ 10:07 0:00 grep --color=auto nova-api<br />stack@devstackvm:~$<br /><br />stack@devstackvm:~$ cat /proc/3070/limits | grep "Max open files"<span class=""><br />Max open files 1024 4096 files <br /></span>stack@devstackvm:~$<br />stack@devstackvm:~$ echo -n "Max open files=8192:unlimited" > /proc/3070/limits <br />-bash: /proc/3070/limits: Permission denied<br />stack@devstackvm:~$ sudo echo -n "Max open files=8192:unlimited" > /proc/3070/limits <br />-bash: /proc/3070/limits: Permission denied<br />stack@devstackvm:~$ <br /><br />root@devstackvm:/home/stack# echo -n "Max open files=8192:unlimited" > /proc/3070/limits<br />bash: echo: write error: Invalid argument<br />root@devstackvm:/home/stack# </span></span></div>
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<div class="gmail_quote">On Mon, Dec 19, 2016 at 11:27 PM, John Petrini <span><<a href="mailto:jpetrini@coredial.com">jpetrini@coredial.com</a>></span> wrote:<br />
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<div>Hi Preshant,</div>
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<div>You can change the open file limit of the running process by echoing the value to it. For example...</div>
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<pre style="white-space: pre-wrap; color: #500050;"><code><span class="m_-1069733783632748892m_-3332145487370785599gmail-il">echo</span> -n "Max open files=8192:unlimited" > /proc/<PID>/<span class="m_-1069733783632748892m_-3332145487370785599gmail-il">limits</span></code></pre>
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<div class="gmail_quote">On Mon, Dec 19, 2016 at 12:21 PM, Prashant Shetty <span><<a href="mailto:prashantshetty1985@gmail.com">prashantshetty1985@gmail.com</a>></span> wrote:<br />
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<div>Hi Arne, <br />Thanks for your reply. Currently all these services are running on ubuntu controller under screen.</div>
Do we have any option to set the file limit option for n-api service in this case?. I am not using systemd in my setup to run these services.<br /><br /></div>
Thanks,</div>
Prashant</div>
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<div class="gmail_quote">On Mon, Dec 19, 2016 at 10:19 PM, Arne Wiebalck <span><<a href="mailto:Arne.Wiebalck@cern.ch">Arne.Wiebalck@cern.ch</a>></span> wrote:<br />
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<div>Prashant,</div>
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<div>If this is for systemd, how about changing the nova-api unit file?</div>
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<div>Something like</div>
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<div>should do it. </div>
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<div>Cheers,</div>
<div> Arne</div>
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<div>On 19 Dec 2016, at 17:23, Prashant Shetty <<a href="mailto:prashantshetty1985@gmail.com">prashantshetty1985@gmail.com</a>> wrote:</div>
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<div dir="ltr"><span style="font-size: small;"><span style="font-family: verdana,sans-serif;">Team,<br /> <br /> I have scale setup and metadata requests are seems to fail from instance. Main reason for failure is "Max open files" limit(1024) set on nova-api service. <br /> Though on controller we have set max open file limit of 65k(limit.conf), nova-api always comes up with 1024 limit causing failure.<br /> <br /> Could someone let me know how can we change the max open files limit of nova-api service?<br /><br /> Setup Details:<br /> <br /> · Single controller<br /> · 500 KVM computes<br /> · Devstack branch: stable/newton<br /> · We have native metadata and dhcp running on platform<br /> · 3750 instances<br /> <br /><br /> stack@controller:/opt/stack/lo<wbr />gs$ ps aux | grep nova-api<br /> stack 14998 2.2 0.3 272104 121648 pts/8 S+ 09:53 0:14 /usr/bin/python /usr/local/bin/nova-api<br /> stack@controller:/opt/stack/lo<wbr />gs$<br /> stack@controller:/opt/stack/lo<wbr />gs$<br /> stack@controller:/opt/stack/lo<wbr />gs$ cat /proc/14998/limits<br /> Limit Soft Limit Hard Limit Units<br /> Max cpu time unlimited unlimited seconds<br /> Max file size unlimited unlimited bytes<br /> Max data size unlimited unlimited bytes<br /> Max stack size 8388608 unlimited bytes<br /> Max core file size unlimited unlimited bytes<br /> Max resident set unlimited unlimited bytes<br /> Max processes 128611 128611 processes<br /> Max open files 1024 4096 files<br /> Max locked memory 65536 65536 bytes<br /> Max address space unlimited unlimited bytes<br /> Max file locks unlimited unlimited locks<br /> Max pending signals 128611 128611 signals<br /> Max msgqueue size 819200 819200 bytes<br /> Max nice priority 0 0<br /> Max realtime priority 0 0<br /> Max realtime timeout unlimited unlimited us<br /> stack@controller:/opt/stack/lo<wbr />gs$<br /> <br /> n-api:<br /></span></span><br />
<div class="m_-1069733783632748892m_-3332145487370785599gmail-m_2676013432257320070m_8343404362413844012gmail-norm" style="margin: 0px; padding: 0px; border-width: 0px; border-style: none; outline: none 0px; font-size: 13px; vertical-align: baseline; color: #333333; font-family: monospace; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: pre-wrap; word-spacing: 0px; background-image: none; background-color: #ffffff; background-size: initial; background-origin: initial; background-clip: initial; background-position: 0% 0%; background-repeat: repeat;">2016-11-08 18:44:26.168 30069 INFO nova.metadata.wsgi.server [req-fb4d729b-a1cd-4df1-aaf8-3<wbr />f854a739cce - -] (30069) wsgi exited, is_accepting=True<br /> Traceback (most recent call last):<br /> File "/usr/local/lib/python2.7/dist<wbr />-packages/eventlet/hubs/hub.py<wbr />", line 457, in fire_timers<br /> timer()<br /> File "/usr/local/lib/python2.7/dist<wbr />-packages/eventlet/hubs/timer.<wbr />py", line 58, in __call__<br /> cb(*args, **kw)<br /> File "/usr/local/lib/python2.7/dist<wbr />-packages/eventlet/event.py", line 168, in _do_send<br /> waiter.switch(result)<br /> File "/usr/local/lib/python2.7/dist<wbr />-packages/eventlet/greenthread<wbr />.py", line 214, in main<br /> result = function(*args, **kwargs)<br /> File "/opt/stack/nova/nova/utils.py<wbr />", line 1066, in context_wrapper<br /> return func(*args, **kwargs)<br /> File "/usr/local/lib/python2.7/dist<wbr />-packages/eventlet/wsgi.py", line 865, in server<br /> client_socket = sock.accept()<br /> File "/usr/local/lib/python2.7/dist<wbr />-packages/eventlet/greenio/bas<wbr />e.py", line 214, in accept<br /> res = socket_accept(fd)<br /> File "/usr/local/lib/python2.7/dist<wbr />-packages/eventlet/greenio/bas<wbr />e.py", line 56, in socket_accept<br /> return descriptor.accept()<br /> File "/usr/lib/python2.7/socket.py"<wbr />, line 206, in accept<br /> sock, addr = self._sock.accept()<br /> error: [Errno 24] Too many open files</div>
<span style="color: #333333; font-family: monospace; font-size: 13px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: pre-wrap; word-spacing: 0px; display: inline; float: none; background-color: #ffffff;"><br /></span><span style="font-size: small;"><span style="font-family: verdana,sans-serif;">Thanks,<br /> Prashant</span></span><br /> </div>
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<div>--<br /> Arne Wiebalck<br /> CERN IT</div>
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