knot-dns-users September 2020

knot-dns-users@lists.nic.cz

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dynamic updates (DDNS)

by Thomas

Hi! Is it safe to mix dynamic updates and manual editing of a zone? Thanks! Thomas

5 years

Debugging high CPU / Load - normal?

by Jonathan Hewlett

Hi, We run around 50 knot servers around the world, with great success - thanks for the software! We are just a little curious about seemingly high CPU usage, and how best to interpret the results, if someone could advise? Specifically, we are seeing the majority of the cpu time in 'system' and not 'user', what would that suggest is happening perhaps? Any tuning help gratefully received! Our platform (sample) 24 Core CPU E5-2440 0 @ 2.40 64Gb RAM SSD knot-2.9.5, running on Centos 8.2 Currently receiving around 4k pps Server is authoritative for a 278 zones, the largest zone file being around 600Mb Output of top top - 20:50:38 up 6 days, 4:49, 2 users, load average: 13.47, 12.34, 11.83 Tasks: 321 total, 2 running, 318 sleeping, 0 stopped, 1 zombie %Cpu0 : 4.0 us, 34.1 sy, 0.0 ni, 60.3 id, 0.3 wa, 0.7 hi, 0.7 si, 0.0 st %Cpu1 : 4.3 us, 19.4 sy, 0.0 ni, 75.3 id, 0.0 wa, 0.3 hi, 0.7 si, 0.0 st %Cpu2 : 4.3 us, 33.8 sy, 0.0 ni, 60.9 id, 0.0 wa, 0.7 hi, 0.3 si, 0.0 st %Cpu3 : 5.0 us, 21.2 sy, 0.0 ni, 73.2 id, 0.0 wa, 0.3 hi, 0.3 si, 0.0 st %Cpu4 : 3.3 us, 34.9 sy, 0.0 ni, 61.5 id, 0.0 wa, 0.3 hi, 0.0 si, 0.0 st %Cpu5 : 3.0 us, 20.2 sy, 0.0 ni, 76.2 id, 0.0 wa, 0.3 hi, 0.3 si, 0.0 st %Cpu6 : 4.0 us, 35.2 sy, 0.0 ni, 60.4 id, 0.0 wa, 0.3 hi, 0.0 si, 0.0 st %Cpu7 : 5.0 us, 18.7 sy, 0.0 ni, 76.0 id, 0.0 wa, 0.3 hi, 0.0 si, 0.0 st %Cpu8 : 2.0 us, 35.0 sy, 0.0 ni, 62.3 id, 0.0 wa, 0.7 hi, 0.0 si, 0.0 st %Cpu9 : 2.0 us, 20.0 sy, 0.0 ni, 77.7 id, 0.0 wa, 0.3 hi, 0.0 si, 0.0 st %Cpu10 : 3.7 us, 34.4 sy, 0.0 ni, 61.2 id, 0.0 wa, 0.7 hi, 0.0 si, 0.0 st %Cpu11 : 3.3 us, 20.7 sy, 0.0 ni, 75.7 id, 0.0 wa, 0.3 hi, 0.0 si, 0.0 st %Cpu12 : 2.3 us, 34.6 sy, 0.0 ni, 62.1 id, 0.0 wa, 0.7 hi, 0.3 si, 0.0 st %Cpu13 : 3.3 us, 20.7 sy, 0.0 ni, 75.7 id, 0.0 wa, 0.3 hi, 0.0 si, 0.0 st %Cpu14 : 2.3 us, 33.6 sy, 0.0 ni, 59.7 id, 0.0 wa, 0.7 hi, 3.7 si, 0.0 st %Cpu15 : 3.3 us, 19.7 sy, 0.0 ni, 76.3 id, 0.0 wa, 0.3 hi, 0.3 si, 0.0 st %Cpu16 : 2.3 us, 34.0 sy, 0.0 ni, 58.7 id, 0.0 wa, 1.0 hi, 4.0 si, 0.0 st %Cpu17 : 2.3 us, 21.5 sy, 0.0 ni, 75.8 id, 0.0 wa, 0.3 hi, 0.0 si, 0.0 st %Cpu18 : 3.3 us, 34.8 sy, 0.0 ni, 57.2 id, 0.0 wa, 0.7 hi, 4.0 si, 0.0 st %Cpu19 : 5.0 us, 19.3 sy, 0.0 ni, 75.1 id, 0.0 wa, 0.3 hi, 0.3 si, 0.0 st %Cpu20 : 2.7 us, 35.3 sy, 0.0 ni, 60.0 id, 0.0 wa, 0.7 hi, 1.3 si, 0.0 st %Cpu21 : 1.7 us, 20.5 sy, 0.0 ni, 77.2 id, 0.0 wa, 0.3 hi, 0.3 si, 0.0 st %Cpu22 : 4.7 us, 32.4 sy, 0.0 ni, 58.5 id, 0.0 wa, 0.7 hi, 3.7 si, 0.0 st %Cpu23 : 2.3 us, 19.0 sy, 0.0 ni, 78.3 id, 0.0 wa, 0.3 hi, 0.0 si, 0.0 st MiB Mem : 64107.4 total, 46764.9 free, 11733.6 used, 5608.8 buff/cache MiB Swap: 32248.0 total, 32248.0 free, 0.0 used. 51670.0 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 213370 knot 20 0 34.0g 9.6g 41784 S 644.9 15.3 1319:12 /usr/sbin/knotd Thanks again for this great product. Jonathan

5 years, 1 month

copy key from one instance to another

by Ulrich Wisser

Hi! For a special project I need to sign the same zone on two servers with the same key. How can I create a key and import it in both instances? Or export an automatically generated key from one instance and import in the other instance? Kind regards from Stockholm /Ulrich

5 years, 2 months

termination of obsolete Knot DNS OBS repos

by Jakub Ružička

Following obsolete OBS package repositories will be terminated without mercy on Friday 18th September 2020: * [knot-dns](https://build.opensuse.org/project/show/home:CZ-NIC:knot-dns) * [knot-dns-latest](https://build.opensuse.org/package/show/home:CZ-NIC:knot-d… If you are using these repos, please refer to [Knot DNS download page](https://www.knot-dns.cz/download/) for links to current package repos for your favourite distribution. Jakub Ružička CZ.NIC packager

5 years, 2 months

Knot DNS 3.0.0 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.0.0! This version introduces lots of new features. You can read more about them on this blog post https://en.blog.nic.cz/2020/09/09/knot-dns-3-0-news/ Don't forget to check the updated benchmarks https://www.knot-dns.cz/benchmark/ Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.0.0/NEWS Migration: https://www.knot-dns.cz/docs/3.0/html/migration.html#upgrade-2-9-x-to-3-0-x Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/docs/3.0/html Support and sponsorship: https://www.knot-dns.cz/support Regards, Daniel

5 years, 2 months

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knot-dns-users September 2020