[mythtv-users] Python3 interface: Could not find setting 'BackendServerAddr' on host '192.168.1.10' [work-around]
Ross Boylan
rossboylan at stanfordalumni.org
Thu Feb 27 23:21:28 UTC 2020
So the fact that host-ipN: results are all hostnames, not IP's, is OK?
Ross
On Thu, Feb 27, 2020 at 1:23 PM Roland Ernst <rcrernst at gmail.com> wrote:
> On Thu, Feb 27, 2020 at 8:23 PM Ross Boylan
> <rossboylan at stanfordalumni.org> wrote:
> >
> > I change the entry in settings, installed the patch and verified that
> the modified version of the python library was loaded. I was concerned
> because sys.path shows
> > ['', '/usr/lib/python37.zip', '/usr/lib/python3.7',
> '/usr/lib/python3.7/lib-dynload',
> '/home/ross/.local/lib/python3.7/site-packages',
> '/usr/local/lib/python3.7/dist-packages', '/usr/lib/python3/dist-packages'],
> > even when I set PYTHONPATH to
> /home/ross/.local/lib/python3.7/site-packages (which is where the new
> version lies). This looks to me as if some system versions are preferred
> to my local ones, which seems weird. But the __file__ attribute of the
> imported module refers to my local copy.
> >
> > $ date; python3 test_canonical_address.py
> > Thu 27 Feb 2020 11:14:58 AM PST
> > host : barley
> > Master-Backend IP: myth.betterworld.us
> > Hash1 : 95de2b5593481b1d
> > Hash2 : 95de2b5593481b1d
> > host-ip1 : myth.betterworld.us
> > BackendServerPort1 : 6543
> > host-ip2 : myth.betterworld.us
> > BackendServerPort2 : 6543
> > host-ip3 : myth.betterworld.us
> > BackendServerPort3 : 6543
> >
> > Does that look right?
> > Ross
> >
> > On Wed, Feb 26, 2020 at 2:07 PM Roland Ernst <rcrernst at gmail.com> wrote:
> >>
> >> On Mon, Feb 24, 2020 at 10:33 PM Ross Boylan
> >> <rossboylan at stanfordalumni.org> wrote:
> >> >
> >> >
> >> >
> >> > On Mon, Feb 24, 2020 at 12:20 PM Peter Bennett <pb.mythtv at gmail.com>
> wrote:
> >> >>
> >> >>
> >> >>
> >> >> On 2/24/20 3:01 PM, Ross Boylan wrote:
> >> >>
> >> >> The workaround is to add an entry to the settings table in the form
> the program wants.
> >> >>
> >> >> I'm not sure if the lack of the appropriate entry originally
> indicates
> >> >> 1. I misconfigured my setup
> >> >> 2. the code has a bug
> >> >> 3. the code is correct for the v31 schema but not for v30.
> >> >> 4. something else
> >> >>
> >> >> From settings table:
> >> >> | value | data | hostname |
> >> >> +-------------------+---------------------+----------+
> >> >> | AllowConnFromAll | 0 | barley |
> >> >> | BackendServerAddr | myth.betterworld.us | barley |
> >> >> | BackendServerAddr | 192.168.1.10 | barley |
> >> >> | ListenOnAllIps | 1 | barley |
> >> >> | MasterServerIP | 192.168.1.10 | NULL |
> >> >> | MasterServerName | barley | NULL |
> >> >> +-------------------+---------------------+----------+
> >> >>
> >> >> The entry for BackendServerAddr | 192.168.1.10 is one I added
> recently; with that I am able to get past the error I reported.
> >> >> I initially used myth.betterworld.us as the hostname, but that
> didn't match my existing entry for BackendServerPort.
> >> >> myth.betterworld.us, barley, and 192.168.1.10 are all the same
> machine, the one on which I'm running.
> >> >>
> >> >>
> >> >>
> >> >> BackendServerAddr and MasterServerName replaced MasterServerIP in
> V30, but if you have not done any update since V29 it may not have been set
> up. I believe the code will still use MasterServerIp if BackendServerAddr
> and MasterServerName are not set up..
> >> >>
> >> >> You can set it up by running mythtv-setup -> General -> Host Address
> Backend Setup on the machine in question. The entry for "Primary IP
> Address/DNS Name" is what is used for BackendServerAddr.
> >> >>
> >> >> I don't know what happens if you have two entries for the same
> hostname. That should not be allowed.
> >> >>
> >> >
> >> > Thanks for the tip about double entries; since it's apparently not
> supposed to be, it seemed safest to fix it the same way I created it, using
> SQL directly.
> >> > I deleted the old entry with the hostname as the data field, and left
> the new one with the IP address.
> >> >
> >> > I recall during setup some uncertainty about whether I should be
> using a name or an IP at various points. Having a hard-coded IP seems a
> bit problematic if the host has a dynamic IP (not currently an issue for
> me, though if I stick the BE in a VM it might be).
> >> >
> >> > Ross
> >>
> >>
> >> Ross,
> >> Thank You for your report about canonical addressing in the Python
> Bindings.
> >>
> >> I created ticket #13593 upon your finding at
> >> https://code.mythtv.org/trac/ticket/13593
> >>
> >> Could you please apply the proposed patch in this ticket and
> >> restore the database to the canonical IP addressing scheme, like
> >>
> >> | BackendServerAddr | myth.betterworld.us | barley |
> >>
> >> and run the attached test file?
> >>
> >> The attached test file does not alter yourt MythTv system in any way.
> >>
> >> The file should report instead of an IP address '10.0.0.XXX'
> >> the canonical address of your MythTV system
> >> and report something like
> >>
> >> $ python3 test_canonical_address.py
> >> host : myserver
> >> Master-Backend IP: 10.0.0.XXX
> >> Hash1 : f78f3ddee497d3e8
> >> Hash2 : f78f3ddee497d3e8
> >> host-ip1 : 10.0.0.XXX
> >> BackendServerPort1 : 6543
> >> host-ip2 : 10.0.0.XXX
> >> BackendServerPort2 : 6543
> >> host-ip3 : 10.0.0.XXX
> >> BackendServerPort3 : 6543
> >>
> >> Roland
> >> _______________________________________________
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> >
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>
> Ross,
> Thank you for verification of this ticket: Yes, your test results looks
> right.
> All connections supported by the MythTV's Python Bindings use now the
> setting of 'BackendServerAddr' instead of 'MasterServerIP'.
>
>
> > This looks to me as if some system versions are preferred to my local
> ones, which seems weird. But the __file__ attribute of the imported module
> refers to my local copy.
> I believe the sys.path modifications belong to the python virtual
> environment framework.
> This should not harm.
>
> Thank You for testing,
> kind regards
> Roland
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