Multiple network interfaces
I am currently running Tango 9.2.5 from Debian Repos.
I encountered some issues which might be linked to the fact, that I do have multiple network interfaces at my Tango Host machine.
One of these issues might be this: https://github.com/sardana-org/sardana/issues/1417
I also had problems with Tango-Accesscontrol and Tango-Starter
Before going too much into details about my actual issues, I was wondering if anyone could share with me a proper setup of a multi-network-interface Tango Host?
I already adjusted the /etc/init.d/tango-db file and set the omniORB endpoint to the FQDN of the machine in the correct network.
Then I encountered issues with my host configuration that I made in my /etc/hosts file and I think also with my mysql-server config which does only allow access from 127.0.0.1
I really encourage you to upgrade.
All the event issues when having multiple network interfaces should be solved in latest versions of JTango and cppTango.
You can try the brand new 9.3.4 Tango Source Distribution (https://github.com/tango-controls/TangoSourceDistribution/releases)
If you are encountering issues which are not related to events, then I think you will need to give us more details about your issues.
Rosenberg's Law: Software is easy to make, except when you want it to do something new.
Corollary: The only software that's worth making is software that does something new.
thank you very much for your prompt reply.
Indeed I will upgrade to the latest Tango Version to cope with the Event problems.
I will now go a bit more into details about my other problems:
I was playing with the Tango Starter and added the TangoTest DS to the Starter without any error.
However, even after a restart TangoTest DS was automatically started and working, but it was not shown in Astor and I could not stop/start the TangoTest DS via Astor.
I was wondering if this might be linked to the issue with the multiple network interfaces.
Because usually the DS which I also run on my Tango Host machine show a hostname/IP of the external network and the hostname/IP of the actual internal/Tango network only as alternative host and then there are even virtual network interfaces from Docker shown as alternative hosts.
To that end, I wanted to tell Tango to only run on the internal network, so I changed the endpoint in the /etc/init.d/tango-db to
My hostname in the local network in which I use Tango is ampere.sxr.lab but I have the following configuration in my /etc/hosts file
Due to that the host of all TangoDS which run on the Tango Host machine is:
This leads the to problems of clients on other hosts, which want to connect to TangoDS or even the TangoDB since they can of course not access 127.0.1.1.
If I use e.g. always IP address instead of Hostnames I also receive errors, when accessing the TangoDB and I fear this is because I set the bind-address of my mysql-server to 127.0.0.1.
So you see everything is quite a mess and I would appreciate any working configuration of TangoDB/hosts/mysql to run smoothly with multiple network cards.
After all this back and forth I can revert all changes to get jive and Sardana back to work, but not Astor which throws now the following error:
So astor has now obviously also problems to determine the correct hostname, right?
I checked the Mysql DB and indeed some the devices have now the internal hostname as host and some have the hostname from the external network (how it was all the time before)
Many thanks in advance!
Hi Daniel, perhaps this topic will help you https://www.tango-controls.org/community/forum/c/general/installation/accessing-devices-running-on-a-two-server-interfaces/ ?
thanks for the link.
Now the database is working correctly on my internal network
host: ampere.sxr.lab (192.168.1.100)
Server PID: 6033
And I can access it from the Tango Host and all clients.
I changed the /etc/hosts file to
and changed to tango-db startup to
But still I the above mentioned error from astor.
Anso also the Event error from Sardana is still there (but I will upgrade to Tango 9.3.5 as I said earlier)
Astor now also works, after I have deleted an entry of the tango Starter with the wrong hostname.
After I changed the /etc/init.d/tango-db file it seems, that it does not take these changes into account after a reboot and I manually need to restart the tango-db and tango-accesscontrol services using systemctl.
Can I avoid that step and do I somehow have to convert the init.d script to a system unit file?
I read that the linux is doing it by itself.