[Pdns-users] Problems with PowerDNS

[Peter van Dijk]

Hello Nadir,

based on the logs, it looks like your powerdns has trouble reaching the 
Internet at all. Are you on a slow or congested link? Note that in 
general your machine looks quite busy!

Kind regards,
-- 
Peter van Dijk
PowerDNS.COM BV - https://www.powerdns.com/

On 10 Nov 2015, at 13:01, Nadir M. Aliyev wrote:

> Hi everyone!
>
>
>
> I have problems with some domains
>
>
>
> For ex. When I do google.com sometimes I get ns records but sometimes 
> I get
> SERFVAIL also it happens basically with google. When I restrart pdns 
> it
> works normally for 5 minutes. Then again SERVFAIL.
>
>
>
> Strange, some domains works some not works.. Even if cache hits.
>
> I increased cache ttls not helped.
>
>
>
> Server details: 8 core cpu, 8 GB of Ram.
>
> Load: pdns 100%, mysql 120%, pdns-recursor 30%, network 40 mbps.
>
>
>
>
>
> Some logs:
>
> Nov 10 15:33:08 ns01 pdns_recursor[15237]: Sending SERVFAIL to 
> 127.0.0.1
> during resolve of 'gm-realm.net.' because: Too much time waiting for
> gm-realm.net.|A, timeouts: 5, throttles: 1, queries: 6, 7578msec
>
> Nov 10 15:33:09 ns01 pdns_recursor[15237]: Sending SERVFAIL to 
> 127.0.0.1
> during resolve of 'gm-realm.net.' because: Too much time waiting for
> gm-realm.net.|A, timeouts: 5, throttles: 2, queries: 6, 7504msec
>
> Nov 10 15:33:12 ns01 pdns_recursor[15237]: Sending SERVFAIL to 
> 127.0.0.1
> during resolve of 'gm-realm.net.' because: Too much time waiting for
> gm-realm.net.|A, timeouts: 5, throttles: 3, queries: 6, 7502msec
>
> Nov 10 15:33:13 ns01 pdns_recursor[15237]: Sending SERVFAIL to 
> 127.0.0.1
> during resolve of 'us.micardapi.micloud.xiaomi.net.' because: Too much 
> time
> waiting for us.api.micloud.mi.com.|A, timeouts: 5, throttles: 0, 
> queries: 7,
> 7709msec
>
> Nov 10 15:33:18 ns01 pdns_recursor[15237]: Sending SERVFAIL to 
> 127.0.0.1
> during resolve of 'www.coocent.net.' because: Too much time waiting 
> for
> s-149179.abc188.com.|A, timeouts: 5, throttles: 0, queries: 8, 
> 8093msec
>
> Nov 10 15:33:18 ns01 pdns_recursor[15237]: Sending SERVFAIL to 
> 127.0.0.1
> during resolve of 'www.6ud1.com.' because: Too much time waiting for
> www.6ud1.com.|A, timeouts: 5, throttles: 0, queries: 6, 7502msec
>
> Nov 10 15:42:52 ns01 pdns_recursor[15237]: stats: 1787915 questions, 
> 497334
> cache entries, 86066 negative entries, 11% cache hits
>
> Nov 10 15:42:52 ns01 pdns_recursor[15237]: stats: throttle map: 6856, 
> ns
> speeds: 29645
>
> Nov 10 15:42:52 ns01 pdns_recursor[15237]: stats: outpacket/query 
> ratio 49%,
> 11% throttled, 0 no-delegation drops
>
> Nov 10 15:42:52 ns01 pdns_recursor[15237]: stats: 211 outgoing tcp
> connections, 1 queries running, 50712 outgoing timeouts
>
> Nov 10 15:42:52 ns01 pdns_recursor[15237]: stats: 322566 packet cache
> entries, 61% packet cache hits
>
> Nov 10 15:42:52 ns01 pdns_recursor[15237]: stats: 926 qps (average 
> over 1930
> seconds)
>
>
>
> Config:
>
>
>
> I have one master server which replicates db to the four slave server.
>
>
>
> # cat recursor.conf
>
> ..
>
> hint-file=/etc/pdns/named.root
>
> allow-from=127.0.0.0/8
>
> local-address=127.0.0.1
>
> local-port=5353
>
> version-string=Bind Recursor
>
> ..
>
>
>
> # cat /etc/pdns/pdns.conf
>
> ..
>
> launch=gmysql
>
> gmysql-host=127.0.0.1
>
> gmysql-port=3306
>
> gmysql-user=p_owerdns
>
> gmysql-password=verysecretpassword
>
> gmysql-dbname=p_ owerdns
>
> gmysql-dnssec="yes"
>
>
>
> #allow to customers
>
> allow-recursion=127.0.0.1/8, 172.16.0.0/16, 10.0.0.0/8, 
> xxx.xxx.xxx.xxx/16
>
>
>
> #master
>
> #allow-axfr-ips=172.16.6.30
>
>
>
> local-address=0.0.0.0
>
> local-port=53
>
>
>
> control-console=no
>
>
>
> query-cache-ttl=18600
>
> cache-ttl=18600
>
> default-ttl=7200
>
> soa-expire-default=18600
>
> soa-minimum-ttl=3600
>
> soa-refresh-default=10800
>
> soa-retry-default=3600
>
>
>
> daemon=yes
>
>
>
> default-soa-name=ns.master.mydomain.net
>
>
>
> distributor-threads=18
>
>
>
> guardian=yes
>
>
>
> #lazy-recursion=yes
>
>
>
> master=no
>
> slave=yes
>
> slave-cycle-interval=600
>
>
>
> max-tcp-connections=100
>
> max-queue-length=50000
>
>
>
> recursor=127.0.0.1:5353
>
>
>
> out-of-zone-additional-processing=yes
>
>
>
> webserver=yes
>
> webserver-address=172.16.6.34
>
> webserver-password=adminadminadmin
>
> webserver-port=8081
>
> webserver-print-arguments=yes
>
>
>
> #loglevel=9
>
> #log-dns-details=yes
>
> #log-dns-queries=yes
>
> #query-logging=yes
>
>
>
> version-string=Bind Resolver
>
> ..
>
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