Stub resolver should reload /etc/resolv.conf

[mnordhoff]

• Program: Authoritative
• Issue type: Bug report

Short description

When "resolver" isn't set, auth's stub resolver reads /etc/resolv.conf once at startup to determine what nameservers to use.

It uses them forever, even if /etc/resolv.conf is later changed.

Environment

• Operating system: Ubuntu 16.04 (x86-64)
• Software version: 4.1.0-1pdns.xenial
• Software source: PowerDNS repository

Steps to reproduce

1. Start PowerDNS.
2. Change /etc/resolv.conf to use different nameservers.
3. Wait for PowerDNS to do a secpoll query.

Expected behaviour

PowerDNS querying one of the nameservers currently in /etc/resolv.conf.

Actual behaviour

PowerDNS querying the nameserver that was in /etc/resolv.conf when it started.

Other information

I use resolvconf. Last time I rebooted, it changed /run/resolvconf/resolv.conf from a nameserver I don't like to a nameserver I do like 1 second after PowerDNS was started. Sad face.

It's not a problem for me, it just makes me unhappy.

I don't often change /etc/resolv.conf.