For MySql connection Kannel libs are not used. Kannel uses MySQL client library and therefore there is something different wrong because MySQL client libs supports IPV6.
Alex > Am 20.07.2020 um 10:28 schrieb Antony Stone > <antony.st...@kannel.open.source.it>: > > On Monday 20 July 2020 at 08:48:39, Alexander Malysh wrote: > >> Hi, >> >> Kannel always take the first IP from DNS response. Therefore you have to >> make sure IPV4 address is the first address, > > Er, you can't do that with DNS. Records are returned from the resolver in a > random order on each request, in a deliberate effort to spread out the load > on > servers. > > On Monday 20 July 2020 at 09:07:15, Alexander Malysh wrote: > >> Hmm, looking into the code Kannel should connect just fine even DNS >> resolves to IPV4 and IPV6. >> >> Please check in your logs in debug mode for: >> >> Connecting to <%s> >> >> AND >> >> connect to <%s> failed > > I see no "Connecting to" messages for the hostname in question. > > I do see: > > 2020-07-20 09:18:19 [6053] [0] ERROR: MYSQL: Can't connect to MySQL server on > 'server.example.com' (111 "Connection refused") > > 2020-07-20 09:18:19 [6053] [0] PANIC: SQLBOX: MySQL: database pool has no > connections! > > 2020-07-20 09:18:19 [6143] [0] ERROR: MYSQL: can not connect to database! > > Now, the "connection refused" part puzzled me - it looked like kannel was > connecting to MySQL but MySQL was saying "go away", so I set up tshark to > capture packets to/from port 3306, and what I see is that an *IPv6* > connection > *is being made* between the two servers, there's a login request, an 'OK' > response and then the connection gets closed. > > I'm going to investigate this a bit more to see exactly what query and > response are being exchanged, once I can spend a bt of time with a broken > system again. > > > Thanks for the assistance, > > > Antony. > > -- > A few words to be cautious of between American and English: > - momentarily > - suspenders > - chips > - pants > - jelly > - pavement > - vest > - pint (and gallon) > - pissed > > > Please reply to the list; > please *don't* CC me. >
