Hi,
we have the following settings and those work fine for us (Kamailio 4
and later):
# Do SRV-Loadbalancing:
dns_srv_lb=yes
# Always prefer IPv6:
dns_try_ipv6=yes
# DNS-Based failover
use_dns_failover=yes
# Query NAPTR-Records as well (we use NAPTR, so the client can detect
the outbound Proxy (P-CSCF), but internally we only use only
SRV-records)
dns_try_naptr=no
Sounds to me, like a DNS problem, not a Kamailio problem.
In our DNS Zone, we have the following, for example:
wt 1D IN A 84.46.93.82
wt 1D IN A 84.46.93.84
wt-1 1D IN A 84.46.93.82
wt-2 1D IN A 84.46.93.84
wt 1D IN NAPTR 10 10 "s" "SIP+D2U" ""
_sip._udp.wt
_sip._udp.wt 1D SRV 10 1 5060 wt-1
_sip._udp.wt 1D SRV 20 1 5060 wt-2
On Debian/Ubuntu, you can verify this with Sofia-SIP (apt-get install
sofia-sip-bin):
carsten@carsten-HP-EliteBook-840-G3:~$ sip-dig
wt.ng-voice.com
1 1.000 udp 5060 84.46.93.82
2 1.000 udp 5060 84.46.93.84
Thanks,
Carsten
2017-01-19 22:58 GMT+01:00 Jeremy Gadd <jeremygadd(a)gmail.com>om>:
Hello, everyone!
I'm trying to enable dns_srv_lb but I'm stuck just before I can get there.
If I don't enable use_dns_failover, lookups work and calls route but always
to the first host. We need to load balance, so that doesn't work very well.
If I enable use_dns_failover, the lookups stop working completely and we get
a dns lookup failure like so:
ERROR: tm [ut.h:296]: uri2dst2(): ERROR: uri2dst: failed to resolve
"redacted.hostname.here.com" :unresolvable A or AAAA request (-7)
This works:
use_dns_cache=on
dns_use_search_list=no
dns_try_naptr=on
# use_dns_failover=on
This breaks it:
use_dns_cache=on
dns_use_search_list=no
dns_try_naptr=on
use_dns_failover=on
I have checked to see that use_dns_failover is compiled in:
version: kamailio 4.4.2 (x86_64/linux)
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS,
DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC,
Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX,
FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR,
USE_DST_BLACKLIST, HAVE_RESOLV_RES
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16,
MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: unknown
compiled with gcc 4.9.2
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