All, Starting at around 10:30 AM PDT (1730 UTC), all three of our DNS servers stopped responding to DNS requests. We temporarily recovered the services starting at 10:53 AM PDT (1753 UTC). Initial investigated work suggests we ran into this problem [1] due to the release of CentOS 7.7 today which updated the version of bind. When our configuration management tool ran, it automatically upgraded bind which caused this problem. For now we've disabled our configuration management on the nodes pending a more permanent solution. We'll try to minimize the outage impacts when we deploy the permanent solution.
Apologies for the issues. [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=820056 -- Lance Albertson Director Oregon State University | Open Source Lab
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