while checking one of the servers running debian jessie i’ve noticed that logs are full of:
Nov 1 06:26:43 xxxrtr named[32117]: error (network unreachable) resolving 'ns1.linode.com/A/IN': 2400:cb00:2049:1::a29f:1b48#53 Nov 1 06:26:43 xxxrtr named[32117]: error (network unreachable) resolving 'ns4.linode.com/A/IN': 2400:cb00:2049:1::a29f:1819#53 Nov 1 06:26:43 xxxrtr named[32117]: error (network unreachable) resolving 'ns5.linode.com/A/IN': 2400:cb00:2049:1::a29f:1819#53 Nov 1 06:26:43 xxxrtr named[32117]: error (network unreachable) resolving 'ns4.linode.com/AAAA/IN': 2400:cb00:2049:1::a29f:1b48#53 Nov 1 06:26:43 xxxrtr named[32117]: error (network unreachable) resolving 'ns5.linode.com/A/IN': 2400:cb00:2049:1::a29f:1b48#53 Nov 1 06:26:43 xxxrtr named[32117]: error (network unreachable) resolving 'ns4.linode.com/A/IN': 2400:cb00:2049:1::a29f:1b48#53 Nov 1 06:26:47 xxxrtr named[32117]: error (network unreachable) resolving 'glb3.glbdns2.microsoft.com/A/IN': 2001:503:ba3e::2:30#53 Nov 1 06:26:47 xxxrtr named[32117]: error (network unreachable) resolving 'glb4.glbdns2.microsoft.com/A/IN': 2001:503:ba3e::2:30#53 Nov 1 06:26:47 xxxrtr named[32117]: error (network unreachable) resolving 'glb3.glbdns2.microsoft.com/AAAA/IN': 2001:503:ba3e::2:30#53 Nov 1 06:26:47 xxxrtr named[32117]: error (network unreachable) resolving 'glb4.glbdns2.microsoft.com/AAAA/IN': 2001:503:ba3e::2:30#53 Nov 1 06:26:47 xxxrtr named[32117]: error (network unreachable) resolving 'glb3.glbdns2.microsoft.com/A/IN': 2001:500:2d::d#53 Nov 1 06:26:47 xxxrtr named[32117]: error (network unreachable) resolving 'glb4.glbdns2.microsoft.com/A/IN': 2001:500:2d::d#53 Nov 1 06:26:47 xxxrtr named[32117]: error (network unreachable) resolving 'glb3.glbdns2.microsoft.com/AAAA/IN': 2001:500:2d::d#53 Nov 1 06:26:47 xxxrtr named[32117]: error (network unreachable) resolving 'glb4.glbdns2.microsoft.com/AAAA/IN': 2001:500:2d::d#53 Nov 1 06:26:47 xxxrtr named[32117]: error (network unreachable) resolving 'glb3.glbdns2.microsoft.com/A/IN': 2001:500:2f::f#53 Nov 1 06:26:47 xxxrtr named[32117]: error (network unreachable) resolving 'glb4.glbdns2.microsoft.com/A/IN': 2001:500:2f::f#53 Nov 1 06:26:47 xxxrtr named[32117]: error (network unreachable) resolving 'glb3.glbdns2.microsoft.com/AAAA/IN': 2001:500:2f::f#53 Nov 1 06:26:47 xxxrtr named[32117]: error (network unreachable) resolving 'glb4.glbdns2.microsoft.com/AAAA/IN': 2001:500:2f::f#53
strange… didn’t i put “-4” in the /etc/default/bind9 ages ago?
# run resolvconf? RESOLVCONF=no # startup options for the server OPTIONS="-f -4 -u bind"
apparently i did but ps shows that it was ignored:
bind 14931 0.1 0.9 404948 37100 ? Ssl 11:58 0:00 /usr/sbin/named -4 -f -u bind
a bit of googling told me it’s a known problem with systemd [sic!] – the /etc/default/bind9 is ignored.
workaround?
mkdir /etc/systemd/system/bind9.service.d/ echo -e "[Service]\nExecStart=\nExecStart=/usr/sbin/named -4 -f -u bind\n" > /etc/systemd/system/bind9.service.d/local.conf systemctl reenable bind9.service service bind9 restart
now things look better on ps:
bind 14931 0.1 0.9 404948 37100 ? Ssl 11:58 0:00 /usr/sbin/named -4 -f -u bind