IPv6 address wanted but IPv6 is disabled!

[Vitaly Solntsev]

Hello, Team

I have Bareos server installed on Oracle Linux v9.6 (Red Hat based) with the disabled IPv6 stack. Since Bareos 21.0.0 release (2021-12-21) Bareos now listens on IPv4 and IPv6 by default. If you currently use [DIR|SD|FD] Address or [DIR|SD|FD] Address, you may need to update your configuration to get the same behaviour as before. PR #882  https://github.com/bareos/bareos/pull/882  Due to the disabled IPv6 on the server all bareos daemons trigger warnings: 07-Nov 18:05 bareos-fd: Warning: Cannot open IPv6 stream socket. ERR=Address family not supported by protocol 07-Nov 18:05 bareos-fd: Warning: Can't add default IPv6 address (IPv6 address wanted but IPv6 is disabled!) 07-Nov 18:04 bareos-sd: Warning: Cannot open IPv6 stream socket. ERR=Address family not supported by protocol 07-Nov 18:04 bareos-sd: Warning: Can't add default IPv6 address (IPv6 address wanted but IPv6 is disabled!) 07-Nov 18:04 bareos-sd: Warning: Can't add default IPv6 address (IPv6 address wanted but IPv6 is disabled!) 07-Nov 17:56 bareos-dir: Warning: Cannot open IPv6 stream socket. ERR=Address family not supported by protocol 07-Nov 17:56 bareos-dir: Warning: Can't add default IPv6 address (IPv6 address wanted but IPv6 is disabled!) Tried to add only IPv4 usage to the configuration files as described at  https://docs.bareos.org/Configuration/CustomizingTheConfiguration.html#datatype-addresses but the warnings are still occuring. /etc/bareos/bareos-dir.d/director/bareos-dir.conf DirAddresses  = {   ipv4 = { addr = 0.0.0.0 } } or Dir Address = 0.0.0.0 /etc/bareos/bareos-fd.d/client/myself.conf FdAddresses = { ip = { addr =  0.0.0.0 ; port = 9102 } }  or FD Address =  0.0.0.0 How can we get rid of these warnings? Thanks

[Bruno Friedmann (bruno-at-bareos)]

My system can use both, and usually I only run Bareos on ipv6

sudo ss -tanp | grep :910
LISTEN     0      50                                    0.0.0.0:9102                                0.0.0.0:*     users:(("bareos-fd",pid=14857,fd=3))

sudo cat /etc/bareos/bareos-fd.d/client/myself.conf
#
# "Global" File daemon configuration specifications
#
FileDaemon {                          # this is me
  Name = bareos-fd
  FDAddresses  = {
#    ipv6 = { addr = :: ; port = 9102 }
    ipv4 = { addr = 0.0.0.0 ; port = 9102}
  }
  WorkingDirectory = /var/lib/bareos
  # remove comment in next line to load plugins from specified directory
  Plugin Directory = /usr/lib64/bareos/plugins
}

I didn't remember but I guess the ipv6 stack on the kernel shouldn't be completely disabled (who want that in 21st century anyways :-) )

So the stack should be present, but it can be not used.

Maybe you can forward a bit more information about what is disabled and how.

Regards

[Vitaly Solntsev]

Hi Bruno

The mentioned above settings still generate 

10-Nov 15:22 bareos-fd: Warning: Cannot open IPv6 stream socket. ERR=Address family not supported by protocol
10-Nov 15:22 bareos-fd: Warning: Can't add default IPv6 address (IPv6 address wanted but IPv6 is disabled!)

which broke all automations.

> I didn't remember but I guess the ipv6 stack on the kernel shouldn't be completely disabled (who want that in 21st century anyways :-) )

> So the stack should be present, but it can be not used.

I see /etc/default/grub

GRUB_CMDLINE_LINUX=".... ipv6.disable=1 ............."

and /proc/cmdline ends with ipv6.disable=1 as well.

That means IPv6 is globally disabled at the kernel level.

I have to use this OS image and can't get the IPv6 stack back.

Can I have the possibility to completely disable ipv6 usage in bareos to avoid these warnings?

Thanks

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[Bruno Friedmann (bruno-at-bareos)]

Did you ever try to boot without that  `ipv6.disable=1` that mean ipv6 will be present just not used.