Date: Tue, 07 Jun 2016 07:29:32 -0600 From: Ian Lepore <ian@freebsd.org> To: krad <kraduk@gmail.com>, Slawa Olhovchenkov <slw@zxy.spb.ru> Cc: "stable@freebsd.org" <stable@freebsd.org> Subject: Re: unbound and ntp issuse Message-ID: <1465306172.1188.24.camel@freebsd.org> In-Reply-To: <CALfReydbzgrVYNRHvtzYufJhFg9xosDP6LEfb4u-Q271MDcvTg@mail.gmail.com> References: <20160602122727.GB75625@zxy.spb.ru> <44lh2mi0k5.fsf@lowell-desk.lan> <20160603191523.GE75630@zxy.spb.ru> <44y46ie92p.fsf@lowell-desk.lan> <20160606135018.GL75630@zxy.spb.ru> <CALfReye2A8XBcjSg%2BB0Z7_j4HJsF9h7EAEjAW4Li2F5c=846YA@mail.gmail.com> <20160607084733.GM75630@zxy.spb.ru> <CALfReyc1GtDnfvVaso5h_sKqP19GZftL7-5SmGqBWEjmOE7XpA@mail.gmail.com> <20160607104335.GN75630@zxy.spb.ru> <CALfReyfX=dNMbqJ%2BUNTUUqHHZEpMUMWpjoyiurKPRF3Ncn5%2BOA@mail.gmail.com> <CALfReydbzgrVYNRHvtzYufJhFg9xosDP6LEfb4u-Q271MDcvTg@mail.gmail.com>
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On Tue, 2016-06-07 at 12:10 +0100, krad wrote: > whops that should be > > ntpdate_hosts not servers > These suggestions are essentially insane because they're ignoring the basic fact that the freebsd installer creates a non-working system. If unbound requires DNSSEC, and DNSSEC requires good time, and good time requires hostname resolution, then that circular dependency is a problem that the freebsd project needs to fix, not something to be hacked around by each individual sysadmin. It is a bit disturbing to me that the project members who created this situation have been silent in the face of *months* of reporting of it by several different users. -- Ian > > On 7 June 2016 at 12:09, krad <kraduk@gmail.com> wrote: > > > something as simple as this thrown in /etc/periodic/daily/ would > > probably > > do it. > > > > #!/bin/sh > > ip=`dig pool.ntp.org +short | head -1' > > cp /etc/hosts /etc/hosts.old && > > sed -e "s/.*ntp-server/$ip ntp-server/" /etc/hosts.old > > > /etc/hosts > > > > > > with these lines in rc.conf > > ntpdate_enable=yes > > ntpdate_servers="ntp-server" > > > > > > > > > > > > On 7 June 2016 at 11:43, Slawa Olhovchenkov <slw@zxy.spb.ru> wrote: > > > > > On Tue, Jun 07, 2016 at 11:35:59AM +0100, krad wrote: > > > > > > > Like i said you could configure ntpdate as well as ntpd, but > > > > give it a > > > > known good ip. It will only run once at boot, and ntpd will > > > > start after > > > so > > > > that can use the nice pool names. > > > > > > > > A slightly better way maybe to give ntpdate a server hostname > > > > like > > > > ntp-server and populated the hosts file with one of the ips > > > > from > > > > pool.ntp.org. You could then have a periodic script to check > > > > and > > > update the > > > > ip in the hosts every day, so it works over a reboot. The ip > > > > would > > > > obviously have to have an initial seed value, but you could > > > > work this > > > out > > > > progmatically at system configuration time with tools like > > > > ansible. > > > > > > What purpose don't do it by standart scripts from base systems? > > > Enforcing DNSSEC must be prevent this strange works on all > > > systems > > > lack CMOS time. > > > > > > I am not expert in sh scripting for this automation. > > > > > > > On 7 June 2016 at 09:47, Slawa Olhovchenkov <slw@zxy.spb.ru> > > > > wrote: > > > > > > > > > On Tue, Jun 07, 2016 at 09:00:29AM +0100, krad wrote: > > > > > > > > > > > Well there is a deadlock situation there so you have to > > > > > > relax one > > > of the > > > > > > conditions, for one time at least. > > > > > > > > > > > > Your best bet is to do a manual ntpdate against a fixed ip > > > > > > of known > > > > > > goodness. If you have a lot of machines you need to do this > > > > > > on, use > > > > > ansible > > > > > > or similar to do the heavy lifting for you. Ansible is best > > > > > > in my > > > opinion > > > > > > if you dont have anything setup as its quick to get going. > > > > > > It does > > > > > require > > > > > > python on the target machines so you would need to install > > > > > > that > > > first. > > > > > > Something like the following should get it working (as you > > > > > > dont > > > have dns > > > > > on > > > > > > the target machine, package fetches wont work, so i would > > > > > > tunnel a > > > squid > > > > > > proxy and let that handle all the internet stuff. > > > > > > > > > > > > add something like the following to your ssh_config > > > > > > > > > > > > Host * > > > > > > RemoteForward 31280 squid_server:3128 > > > > > > > > > > > > then run some stuff like this (after installing ansible on > > > > > > your > > > > > > desktop/bastion host) > > > > > > > > > > > > ansible -b -m raw -a '/usr/bin/env ASSUME_ALWAYS_YES=1 > > > > > > http_proxy= > > > > > > http://127.0.0.1:31280 /usr/sbin/pkg bootstrap -f' -u root > > > > > > -i > > > > > > <host_list_file> -kS --ask-su-pass > > > > > > > > > > > > ansible -b -m raw -a 'env ASSUME_ALWAYS_YES=YES > > > > > > http_proxy= > > > > > > http://127.0.0.1:31280 pkg install python' -u root -i > > > <host_list_file> > > > > > > -kS --ask-su-pass > > > > > > > > > > > > ansible -m shell -a "ntpdate <good_ntp_server_ip>" -kS > > > --ask-su-pass -i > > > > > > <host_list_file> > > > > > > > > > > > > from here on you should be able to start unbound and then > > > > > > ntpd eg > > > > > > > > > > > > ansible -m service -a "name=local_unbound state=restarted" > > > > > > -kS --ask-su-pass -i <host_list_file> > > > > > > ansible -m service -a "name=ntpd state=restarted" -kS > > > --ask-su-pass -i > > > > > > <host_list_file > > > > > > > > > > > > Alternatively you could just relax your dnssec rules on > > > > > > first boot > > > to > > > > > give > > > > > > ntp a chance. Probably much easier 8) > > > > > > > > > > How I am do it? I am don't touch dnssec rules and don't know > > > > > unbound. > > > > > May be this is posible by startup scripts? > > > > > Also, some platforms lack of CMOS time, RPi, for example. > > > > > > > > > > > Also make sure you are using the '-g' flag on ntpd > > > > > > > > > > Yes, I am add `ntpd_sync_on_start=yes` to rc.conf. > > > > > I am suggest do it by checkbox in bsdinstall. > > > > > > > > > > > > > > > > On 6 June 2016 at 14:50, Slawa Olhovchenkov <slw@zxy.spb.ru > > > > > > > wrote: > > > > > > > > > > > > > On Mon, Jun 06, 2016 at 09:33:02AM -0400, Lowell Gilbert > > > > > > > wrote: > > > > > > > > > > > > > > > Slawa Olhovchenkov <slw@zxy.spb.ru> writes: > > > > > > > > > > > > > > > > > On Fri, Jun 03, 2016 at 02:34:18PM -0400, Lowell > > > > > > > > > Gilbert > > > wrote: > > > > > > > > > > > > > > > > > > > Slawa Olhovchenkov <slw@zxy.spb.ru> writes: > > > > > > > > > > > > > > > > > > > > > Default install with local_unbound and ntpd can't > > > > > > > > > > > be > > > functional > > > > > with > > > > > > > > > > > incorrect date/time in BIOS: > > > > > > > > > > > > > > > > > > > > > > Unbound requred correct time for DNSSEC check and > > > > > > > > > > > refuseing > > > > > queries > > > > > > > > > > > ("Jul 1 20:17:29 yellowrat unbound: [3444:0] > > > > > > > > > > > info: failed > > > to > > > > > prime > > > > > > > > > > > trust anchor -- DNSKEY rrset is not secure . > > > > > > > > > > > DNSKEY IN") > > > > > > > > > > > > > > > > > > > > > > ntpd don't have any numeric IP of ntp servers in > > > > > > > > > > > ntp.conf > > > -- > > > > > only > > > > > > > > > > > symbolic names like 0.freebsd.pool.ntp.org, as > > > > > > > > > > > result -- > > > can't > > > > > > > > > > > resolve (see above, about DNSKEY). > > > > > > > > > > > > > > > > > > > > I can't see how this would happen. DNSSEC doesn't > > > > > > > > > > seem to be > > > > > required > > > > > > > in > > > > > > > > > > a regular install as far as I can see. Certainly I > > > > > > > > > > don't > > > have any > > > > > > > > > > > > > > > > > > I don't know reasson for enforcing DNSSEC in regular > > > > > > > > > install. > > > > > > > > > I am just select `local_unbound` at setup time and > > > > > > > > > enter > > > > > `127.0.0.1` as > > > > > > > > > nameserver address. > > > > > > > > > > > > > > > > That's not enough to configure unbound as a fully > > > > > > > > recursive DNS > > > > > > > > server. > > > > > > > > > > > > > > What I am missing? > > > > > > > Need to fix unbound setup scripts? bsdinstall scripts? > > > > > > > As I see unbound setup scripts detects 127.0.0.1 in > > > > > > > resolv.conf > > > and > > > > > > > configured unbound as fully recursive DNS server. > > > > > > > > > > > > > > > If your system gets its address through DHCP, it is > > > > > > > > probably > > > > > > > > getting DNS server addresses as well, and would work > > > > > > > > fine > > > *without* > > > > > your > > > > > > > > configuring any of the DNS state. > > > > > > > > > > > > > > I am have static address and don't getting DNS server > > > > > > > address. > > > > > > > > > > > > > > > > > problem on any of my systems, and I've never > > > > > > > > > > configured an > > > anchor > > > > > on > > > > > > > the > > > > > > > > > > internal systems. > > > > > > > > > > > > > > > > > > > > > IMHO, ntp.conf need to include some numeric IP of > > > > > > > > > > > public > > > ntp > > > > > > > servers. > > > > > > > > > > > > > > > > > > > > Ouch; that's a terrible idea, for several different > > > > > > > > > > reasons. > > > > > > > > > > > > > > > > > > What else? > > > > > > > > > > > > > > > > All the normal reasons that hard-coding IP addresses is > > > > > > > > a bad > > > idea; > > > > > they > > > > > > > > can change, you're encouraging a lot of people to use > > > > > > > > the same > > > ones, > > > > > etc. > > > > > > > > > > > > > > And how to resolve this issuse: > > > > > > > > > > > > > > - default install with unbound as recursive DNS server > > > > > > > (by default > > > > > > > enforcing DNSSEC) > > > > > > > - ntp time synchronisation > > > > > > > - stale CMOS time (2008 year) > > > > > > > _______________________________________________ > > > > > > > freebsd-stable@freebsd.org mailing list > > > > > > > https://lists.freebsd.org/mailman/listinfo/freebsd-stable > > > > > > > To unsubscribe, send any mail to " > > > > > freebsd-stable-unsubscribe@freebsd.org" > > > > > > > > > > > > > > > > > > > > _______________________________________________ > freebsd-stable@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to " > freebsd-stable-unsubscribe@freebsd.org"
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