Release 2020_002 (2020-01-21)

Impact

• [NixOS 19.03] VMs will be rebooted during individual maintenance windows.

NixOS 19.03 platform

• Add loghost, graylog (3.x) and elasticsearch (5.x, 6.x) roles (#119556).

• Logging from 19.03 hosts to Graylog works now (#120805).

• Use BFQ for I/O scheduling to reduce system load during OS garbage collection (#119463, #115735).

• Update kernel to 4.19.94 (#122779).

• Prometheus/statshost: fix missing data after upgrade from 15.09 (#115483).

Gentoo platform

• Increase warning/critical limits for dovecot [hotfix] (#122785).

• Fix error on puppet certificate renewal (#122712).