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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Hi Alain,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">Thank you for your help and your suggestion.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">We are trying to implement DNS_CACHE module with a record “oms” in etc/hosts (same in dispatcher) and Opensips doesn’t resolve the name when DNS_CACHE is activated.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">Here are our declarations in opensips.cfg file :<o:p></o:p></span></p>
<p><span lang="EN-US">### DNS CACHE MODULE ###loadmodule "cachedb_local.so"<br>
loadmodule "cachedb_sql.so"<br>
loadmodule "dns_cache.so"<br>
modparam("cachedb_sql", "cachedb_url", "sql:mysql://opensips:opensipsrw@ossdb/opensips")<br>
modparam("cachedb_sql", "db_table","cachedb")<br>
modparam("dns_cache", "cachedb_url", "sql:mysql://opensips:opensipsrw@ossdb/opensips")<o:p></o:p></span></p>
<p><span lang="EN-US">Here are the logs :<o:p></o:p></span></p>
<p class="MsoNormal"><span class="ui-provider"><span lang="EN-US">CRITICAL:core:mk_proxy: could not resolve hostname: "oms"</span></span><span lang="EN-US"><br>
<span class="ui-provider">Jan 12 10:47:52 [37] ERROR:dispatcher:add_dest2list: could not resolve oms, skipping it</span><br>
<span class="ui-provider">Jan 12 10:47:52 [37] WARNING:dispatcher:ds_load_data: failed to add destination
</span></span><span class="ui-provider"><a href="sip:oms:5060"><span lang="EN-US">sip:oms:5060</span></a></span><span class="ui-provider"><span lang="EN-US"> in group 100</span></span><span lang="EN-US"><br>
<span class="ui-provider">Jan 12 10:47:52 [37] WARNING:dispatcher:ds_load_data: No record loaded from db, running on empty sets</span></span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">There is another name (“rtpe”) declared in etc/hosts is also used in opensips.cfg and there is no problem to resolve it. The problem seams to be only in dispatcher.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">Are we missing something in our way of using it ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"> Guillaume<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
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<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span style="mso-fareast-language:FR">De :</span></b><span style="mso-fareast-language:FR"> Users <users-bounces@lists.opensips.org>
<b>De la part de</b> Alain Bieuzent<br>
<b>Envoyé :</b> mardi 9 janvier 2024 10:54<br>
<b>À :</b> OpenSIPS users mailling list <users@lists.opensips.org><br>
<b>Objet :</b> Re: [OpenSIPS-Users] DNS could not resolve hostname in dispatcher<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi Guillaume,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">have you tried to cache your DNS queries with the dns_cache module (<a href="https://opensips.org/html/docs/modules/3.3.x/dns_cache">https://opensips.org/html/docs/modules/3.3.x/dns_cache</a>) ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Regards<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black;mso-fareast-language:FR">De :
</span></b><span style="font-size:12.0pt;color:black;mso-fareast-language:FR">Users <<a href="mailto:users-bounces@lists.opensips.org">users-bounces@lists.opensips.org</a>> au nom de <<a href="mailto:guillaume.desgeorge@orange.com">guillaume.desgeorge@orange.com</a>><br>
<b>Répondre à : </b>OpenSIPS users mailling list <<a href="mailto:users@lists.opensips.org">users@lists.opensips.org</a>><br>
<b>Date : </b>mardi 9 janvier 2024 à 10:35<br>
<b>À : </b>OpenSIPS users mailling list <<a href="mailto:users@lists.opensips.org">users@lists.opensips.org</a>><br>
<b>Objet : </b>[OpenSIPS-Users] DNS could not resolve hostname in dispatcher<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="mso-fareast-language:FR"><o:p> </o:p></span></p>
</div>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Hi everyone,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">We are facing a problem with Opensips 3.3 (but I’ve done tests on opensips 2.4 and it was the same).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">In the dispatcher, if we have a name instead of an IP address in “destination”, and that the DNS falls down, we have an error “could not resolve hostname” in the
log. Then, Opensips can’t resolve the name, there is no more OPTIONS message sent to the destination but the state stays as 0 and if a call arrives, Opensips still route the INVITE to the last known IP address.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">I find that’s strange :
<o:p></o:p></span></p>
<ul style="margin-top:0cm" type="disc">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo3"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">Either Opensips consider that the DNS is down but the destination may be still up with the last IP address
he knows and he could still send OPTIONS messages to the last known IP address<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo3"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">Either Opensips consider that the DNS is down and doesn’t send OPTIONS message but in that case he should
not send INVITE to the old IP address.<o:p></o:p></span></li></ul>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">I work with a product that has his own DNS and removes the name of the server in the DNS when the machine is down. So everytime the server is down, Opensips can’t
resolve the name and still send calls to that server…<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">Is there any parameters I can use to change that way of working ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"> Guillaume</span><o:p></o:p></p>
<div style="margin-left:5.0pt;margin-top:5.0pt;margin-right:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" align="center" style="text-align:center"><span style="font-size:8.0pt;font-family:"Helvetica 75 Bold",sans-serif;color:#ED7D31">Orange Restricted<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
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Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc
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Orange decline toute responsabilite si ce message a ete altere, deforme ou falsifie. Merci.
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