Problems with kprop and incremental propagation
Jeremy Hunt
jeremyh at optimation.com.au
Wed Nov 10 17:48:49 EST 2010
Hi Matej,
Try setting default_realm = KRB.MY.DOMAIN as a global parameter at the top of your krb5.conf file. That should fix problem one.
Secondly, you only need iprop_enable and iprop_port to get the incremental propagation going.
Your other two settings are nice to have tuning parameters. Until you get incremental proagation working you don't really know what they should be set to. I am guessing they are set too low and the propagation mechanism is spinning out trying to catch up.
How incremental propagation works is that it compares the log files on all servers and propagates updates as it can while it can keep the two logs in a synchronised state. You appear to have your log size set too low and so I suspect you are truncating your driver file which sets the flag for full propagation. I am surprised you say that full propagation takes too long, but if so then it probably attempts a full propagation while it is busy. Because it is busy it fails the full propagation and throws away the replica's updates. Then it tries again next cycle. I bet it can do a full propagation in a quiet period.
All of my iprop settings are in my kdc.conf file, but obviously your incremental propagation is attempting to work, so I learned something.
Apart from that your configuration appears okay.
After changing your configuration files, restart all you kerberos daemons.
If kprop is still not picking up your domain, run strace or truss on it and see if it is reading the correct file.
I hope that helps,
Jeremy
On 10/11/2010 9:04 PM, Matej Zagiba wrote:
> [safeTgram (safetgram-in) receive status: NOT encrypted, NOT signed.]
>
>
> Hello,
>
> I have two problems with kprop/kpropd. At out site we are using (tying to use) two KDCs both version are 1.8.3 (1.8.3-dfsg-2 from debian repositories). One of them is production server with over 85k proncipals, second shoud be slave server.
> I followed install manualhttp://web.mit.edu/kerberos/krb5-1.8/krb5-1.8.3/doc/krb5-install.html#Install%20the%20Slave%20KDCs.
> Exact configuration details areat the end of post.
>
>
> First problem with kprop is, it=s not recognize defaut realm:
>
> root at kdc1:~# /usr/sbin/kprop -f /var/lib/krb5kdc/slave_datatrans kdc2.my.domain
> /usr/sbin/kprop: Cannot resolve network address for KDC in requested realm while getting initial ticket
>
> if I force realm with -r option, everything goes as expected:
>
> root at kdc1:~# time /usr/sbin/kdb5_util dump /var/lib/krb5kdc/slave_datatrans
> real 0m11.119s
> user 0m10.685s
> sys 0m0.404s
> root at kdc1:~# /usr/sbin/kprop.orig -r KRB.MY.DOMAIN -f /var/lib/krb5kdc/slave_datatrans kdc2.my.domain
> Database propagation to kdc2.my.domain: SUCCEEDED
>
> While in usual cron synchronization it is not a big deal, in incremental propagation it means that full resync never
> succeed. I wrote a little wrapper aroun kprobe, so full resync now works, but I wonder, if there is anything wrong in my configuration, or if it is bug.
>
>
> Second problem is that kpropd allways asks for full resync. In kadmin logs it looks like this:
> === start of kpropd on slave ===
> Nov 10 10:43:34 kdc1 kadmind[9394](Notice): Request: iprop_get_updates_1, UPDATE_BUSY; Incoming SerialNo=0; Outgoing SerialNo=N/A, success, client=kiprop/kdc2.my.domain at KRB.MY.DOMAIN,service=kiprop/kdc1.my.domain at KRB.MY.DOMAIN, addr=kdc2_ip
> Nov 10 10:43:38 kdc1 kadmind[9394](Notice): Request: iprop_get_updates_1, UPDATE_BUSY; Incoming SerialNo=0; Outgoing SerialNo=N/A, success, client=kiprop/kdc2.my.domain at KRB.MY.DOMAIN,service=kiprop/kdc1.my.domain at KRB.MY.DOMAIN, addr=kdc2_ip
> Nov 10 10:43:46 kdc1 kadmind[9394](Notice): Request: iprop_get_updates_1, UPDATE_FULL_RESYNC_NEEDED; Incoming SerialNo=0; Outgoing SerialNo=N/A, success, client=kiprop/kdc2.my.domain at KRB.MY.DOMAIN,service=kiprop/kdc1.my.domain at KRB.MY.DOMAIN, addr=kdc2_ip
> Nov 10 10:43:46 kdc1 kadmind[9394](Notice): Request: iprop_full_resync_1, spawned resync process 14944, client=kiprop/kdc2.my.domain at KRB.MY.DOMAIN, service=kiprop/kdc1.my.domain at KRB.MY.DOMAIN, addr=kdc2_ip
> Nov 10 10:44:51 kdc1 kadmind[9394](Notice): Request: iprop_get_updates_1, UPDATE_NIL; Incoming SerialNo=208; Outgoing SerialNo=N/A, success, client=kiprop/kdc2.my.domain at KRB.MY.DOMAIN,service=kiprop/kdc1.my.domain at KRB.MY.DOMAIN, addr=kdc2_ip
> Nov 10 10:45:21 kdc1 kadmind[9394](Notice): Request: iprop_get_updates_1, UPDATE_OK; Incoming SerialNo=208; Outgoing SerialNo=209, success, client=kiprop/kdc2.my.domain at KRB.MY.DOMAIN,service=kiprop/kdc1.my.domain at KRB.MY.DOMAIN, addr=kdc2_ip
> Nov 10 10:45:51 kdc1 kadmind[9394](Notice): Request: iprop_get_updates_1, UPDATE_FULL_RESYNC_NEEDED; Incoming SerialNo=0; Outgoing SerialNo=N/A, success, client=kiprop/kdc2.my.domain at KRB.MY.DOMAIN,service=kiprop/kdc1.my.domain at KRB.MY.DOMAIN, addr=kdc2_ip
> Nov 10 10:45:51 kdc1 kadmind[9394](Notice): Request: iprop_full_resync_1, spawned resync process 14968, client=kiprop/kdc2.my.domain at KRB.MY.DOMAIN, service=kiprop/kdc1.my.domain at KRB.MY.DOMAIN, addr=kdc2_ip
> Nov 10 10:46:57 kdc1 kadmind[9394](Notice): Request: iprop_get_updates_1, UPDATE_NIL; Incoming SerialNo=210; Outgoing SerialNo=N/A, success, client=kiprop/kdc2.my.domain at KRB.MY.DOMAIN,service=kiprop/kdc1.my.domain at KRB.MY.DOMAIN, addr=kdc2_ip
> Nov 10 10:47:27 kdc1 kadmind[9394](Notice): Request: iprop_get_updates_1, UPDATE_NIL; Incoming SerialNo=210; Outgoing SerialNo=N/A, success, client=kiprop/kdc2.my.domain at KRB.MY.DOMAIN,service=kiprop/kdc1.my.domain at KRB.MY.DOMAIN, addr=kdc2_ip
> Nov 10 10:47:57 kdc1 kadmind[9394](Notice): Request: iprop_get_updates_1, UPDATE_NIL; Incoming SerialNo=210; Outgoing SerialNo=N/A, success, client=kiprop/kdc2.my.domain at KRB.MY.DOMAIN,service=kiprop/kdc1.my.domain at KRB.MY.DOMAIN, addr=kdc2_ip
> Nov 10 10:48:27 kdc1 kadmind[9394](Notice): Request: iprop_get_updates_1, UPDATE_NIL; Incoming SerialNo=210; Outgoing SerialNo=N/A, success, client=kiprop/kdc2.my.domain at KRB.MY.DOMAIN,service=kiprop/kdc1.my.domain at KRB.MY.DOMAIN, addr=kdc2_ip
> Nov 10 10:48:57 kdc1 kadmind[9394](Notice): Request: iprop_get_updates_1, UPDATE_BUSY; Incoming SerialNo=210; Outgoing SerialNo=N/A, success, client=kiprop/kdc2.my.domain at KRB.MY.DOMAIN,service=kiprop/kdc1.my.domain at KRB.MY.DOMAIN, addr=kdc2_ip
> Nov 10 10:49:01 kdc1 kadmind[9394](Notice): Request: iprop_get_updates_1, UPDATE_BUSY; Incoming SerialNo=210; Outgoing SerialNo=N/A, success, client=kiprop/kdc2.my.domain at KRB.MY.DOMAIN,service=kiprop/kdc1.my.domain at KRB.MY.DOMAIN, addr=kdc2_ip
> Nov 10 10:49:09 kdc1 kadmind[9394](Notice): Request: iprop_get_updates_1, UPDATE_OK; Incoming SerialNo=210; Outgoing SerialNo=212, success, client=kiprop/kdc2.my.domain at KRB.MY.DOMAIN,service=kiprop/kdc1.my.domain at KRB.MY.DOMAIN, addr=kdc2_ip
> Nov 10 10:49:39 kdc1 kadmind[9394](Notice): Request: iprop_get_updates_1, UPDATE_FULL_RESYNC_NEEDED; Incoming SerialNo=0; Outgoing SerialNo=N/A, success, client=kiprop/kdc2.my.domain at KRB.MY.DOMAIN,service=kiprop/kdc1.my.domain at KRB.MY.DOMAIN, addr=kdc2_ip
> Nov 10 10:49:39 kdc1 kadmind[9394](Notice): Request: iprop_full_resync_1, spawned resync process 15002, client=kiprop/kdc2.my.domain at KRB.MY.DOMAIN, service=kiprop/kdc1.my.domain at KRB.MY.DOMAIN, addr=kdc2_ip
> Nov 10 10:50:45 kdc1 kadmind[9394](Notice): Request: iprop_get_updates_1, UPDATE_OK; Incoming SerialNo=213; Outgoing SerialNo=214, success, client=kiprop/kdc2.my.domain at KRB.MY.DOMAIN,service=kiprop/kdc1.my.domain at KRB.MY.DOMAIN, addr=kdc2_ip
>
>
> Please help me solve this problem, because this way incrementall propagation has no meaning, and conventional use of kprop take too long.
>
> thanks
>
> Matej Zagiba
>
>
> configuration:
> /etc/krb5.conf (both master and slave):
>
> [libdefaults]
> default_realm = KRB.MY.DOMAIN
> kdc_timesync = 1
> ccache_type = 4
> forwardable = true
> proxiable = true
>
>
> [realms]
> KRB.MY.DOMAIN = {
> kdc = kdc1.my.domain
> kdc = kdc2.my.domain
> admin_server = kdc1.my.domain
> iprop_enable = true
> iprop_master_ulogsize = 2048
> iprop_slave_poll = 30
> iprop_port = 755
> }
>
> [domain_realm]
> .my.domain. = KRB.MY.DOMAIN
> my.domain. = KRB.MY.DOMAIN
>
> [logging]
> kdc = FILE:/var/log/kdc5.log
> admin_server = FILE:/var/log/kadm5.log
> default = FILE:/var/log/krb5.log
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