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kronosnet v1.14 released
by Fabio M. Di Nitto 31 Jan '20

31 Jan '20

All, We are pleased to announce the general availability of kronosnet v1.14 kronosnet (or knet for short) is the new underlying network protocol for Linux HA components (corosync), that features the ability to use multiple links between nodes, active/active and active/passive link failover policies, automatic link recovery, FIPS compliant encryption (nss and/or openssl), automatic PMTUd and in general better performance compared to the old network protocol. Highlights in this release: * [MAJOR] different fixes in managing UDP sockets due to recent kernel changes. * [MAJOR] SCTP partial rewrite to make it work with newer kernels and FreeBSD. FreeBSD users please read the updated README for new sysctl. The development team will be working to evaluate if it's possible to avoid this new sysctl. * Fix internal and external latency calculator to avoid underflows, incorrect values and be consistent. * Fix code to deal with mixed (UDP and SCTP) environments. * Fix common transport code to avoid spinning on EOF messages. * Minor build fixes (support gcc10, openssl, etc). Known issues in this release: * FreeBSD users with SCTP configured should add a new sysctl (see README) The source tarballs can be downloaded here: https://www.kronosnet.org/releases/ Upstream resources and contacts: https://kronosnet.org/ https://github.com/kronosnet/kronosnet/ https://ci.kronosnet.org/ https://trello.com/kronosnet (TODO list and activities tracking) https://goo.gl/9ZvkLS (google shared drive with presentations and diagrams) IRC: #kronosnet on Freenode https://lists.kronosnet.org/mailman/listinfo/users https://lists.kronosnet.org/mailman/listinfo/devel https://lists.kronosnet.org/mailman/listinfo/commits Cheers, The knet developer team

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kronosnet v1.13 released
by Fabio M. Di Nitto 16 Oct '19

16 Oct '19

All, We are pleased to announce the general availability of kronosnet v1.13 kronosnet (or knet for short) is the new underlying network protocol for Linux HA components (corosync), that features the ability to use multiple links between nodes, active/active and active/passive link failover policies, automatic link recovery, FIPS compliant encryption (nss and/or openssl), automatic PMTUd and in general better performances compared to the old network protocol. Highlights in this release: * IMPORTANT/URGENT: fix defrag buffer reclaim logic that could lead knet to deliver corrupted data to the application (corosync or alike). * IMPORTANT/URGENT: fix MTU boundary check on links with very high packet loss and avoid delivering corrupted (short) data to the application. * Optimize reassembly of defrag packets by avoid unnecessary memmoves. * Improvements to the test suite to deal with the above bugs and potentially reduce regressions in future. * Minor stability fixes to the test suite. Known issues in this release: *none The source tarballs can be downloaded here: https://www.kronosnet.org/releases/ Upstream resources and contacts: https://kronosnet.org/ https://github.com/kronosnet/kronosnet/ https://ci.kronosnet.org/ https://trello.com/kronosnet (TODO list and activities tracking) https://goo.gl/9ZvkLS (google shared drive with presentations and diagrams) IRC: #kronosnet on Freenode https://lists.kronosnet.org/mailman/listinfo/users https://lists.kronosnet.org/mailman/listinfo/devel https://lists.kronosnet.org/mailman/listinfo/commits Cheers, The knet developer team

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kronosnet v1.12 released
by Fabio M. Di Nitto 20 Sep '19

20 Sep '19

All, We are pleased to announce the general availability of kronosnet v1.12 (bug fix release) kronosnet (or knet for short) is the new underlying network protocol for Linux HA components (corosync), that features the ability to use multiple links between nodes, active/active and active/passive link failover policies, automatic link recovery, FIPS compliant encryption (nss and/or openssl), automatic PMTUd and in general better performances compared to the old network protocol. Highlights in this release: * IMPORTANT: any version prior to 1.12 has a memory corruption bug that could cause knet to crash or hung when the network is not stable for a long period of time. Please see https://github.com/kronosnet/kronosnet/issues/255 for details. If you are unable to upgrade to 1.12, please make sure to cherry pick https://github.com/kronosnet/kronosnet/commit/6a92361c7554c2aa7222d6f868e43… (stable branch) into your distribution as soon as possible. * Fixed all coverity scan errors for runtime code. * Fixed latency calculation in some corner cases that could cause internal latency values to spike too high with incorrect values. * Fixed some documentation. * Add support for musl libc Known issues in this release: * none The source tarballs can be downloaded here: https://www.kronosnet.org/releases/ Upstream resources and contacts: https://kronosnet.org/ https://github.com/kronosnet/kronosnet/ https://ci.kronosnet.org/ https://trello.com/kronosnet (TODO list and activities tracking) https://goo.gl/9ZvkLS (google shared drive with presentations and diagrams) IRC: #kronosnet on Freenode https://lists.kronosnet.org/mailman/listinfo/users https://lists.kronosnet.org/mailman/listinfo/devel https://lists.kronosnet.org/mailman/listinfo/commits Cheers, The knet developer team

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kronosnet v1.11 released
by Fabio M. Di Nitto 21 Aug '19

21 Aug '19

All, We are pleased to announce the general availability of kronosnet v1.11 kronosnet (or knet for short) is the new underlying network protocol for Linux HA components (corosync), that features the ability to use multiple links between nodes, active/active and active/passive link failover policies, automatic link recovery, FIPS compliant encryption (nss and/or openssl), automatic PMTUd and in general better performances compared to the old network protocol. Highlights in this release: * Major bug fixes in the PMTUd code. MTU was not calculated correctly when using crypto and PMTUd would fail due to timeouts when using crypto and systems are overloaded. Thanks to the proxmox community for reporting the issues and testing pre-fixes. * Allow TX and RX threads to flush queues during shutdown to avoid dropping outgoing packets. * Add a new API to allow manual override of PMTUd/MTU. Please use with caution. (NOTE to package maintainers, this also includes a minor soname bump) * Minor internal improvements and bug fixes. Known issues in this release: * none The source tarballs can be downloaded here: https://www.kronosnet.org/releases/ Upstream resources and contacts: https://kronosnet.org/ https://github.com/kronosnet/kronosnet/ https://ci.kronosnet.org/ https://trello.com/kronosnet (TODO list and activities tracking) https://goo.gl/9ZvkLS (google shared drive with presentations and diagrams) IRC: #kronosnet on Freenode https://lists.kronosnet.org/mailman/listinfo/users https://lists.kronosnet.org/mailman/listinfo/devel https://lists.kronosnet.org/mailman/listinfo/commits Cheers, The knet developer team

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kronosnet v1.10 released
by Fabio M. Di Nitto 13 Jun '19

13 Jun '19

All, We are pleased to announce the general availability of kronosnet v1.10 kronosnet (or knet for short) is the new underlying network protocol for Linux HA components (corosync), that features the ability to use multiple links between nodes, active/active and active/passive link failover policies, automatic link recovery, FIPS compliant encryption (nss and/or openssl), automatic PMTUd and in general better performances compared to the old network protocol. Highlights in this release: * Add support for IP based access lists to filter packets only from known or allowed sources (please be aware of the minor soname change!) * Add support for zstd compression * Update upstream spec file to build rpm * Fix ssl runtime reconfiguration code to be much more robust * Many minor bug fixes * Fixed license headers across the board to be more clear which license applies where Known issues in this release: * none The source tarballs can be downloaded here: https://www.kronosnet.org/releases/ Upstream resources and contacts: https://kronosnet.org/ https://github.com/kronosnet/kronosnet/ https://ci.kronosnet.org/ https://trello.com/kronosnet (TODO list and activities tracking) https://goo.gl/9ZvkLS (google shared drive with presentations and diagrams) IRC: #kronosnet on Freenode https://lists.kronosnet.org/mailman/listinfo/users https://lists.kronosnet.org/mailman/listinfo/devel https://lists.kronosnet.org/mailman/listinfo/commits Cheers, The knet developer team

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kronosnet v1.9 released
by Fabio M. Di Nitto 09 May '19

09 May '19

All, We are pleased to announce the general availability of kronosnet v1.9 kronosnet (or knet for short) is the new underlying network protocol for Linux HA components (corosync), that features ability to use multiple links between nodes, active/active and active/passive link failover policies, automatic link recovery, FIPS compliant encryption (nss and/or openssl), automatic PMTUd and in general better performances compared to the old network protocol. Highlights in this release: * Reduce minimum crypto key size requirement to 1024bit * Drop libnss 3des support * Lots of man pages improvements and cleanup * Improved UDP error reporting from ICMP error messages Known issues in this release: * none The source tarballs can be downloaded here: https://www.kronosnet.org/releases/ Upstream resources and contacts: https://kronosnet.org/ https://github.com/kronosnet/kronosnet/ https://ci.kronosnet.org/ https://trello.com/kronosnet (TODO list and activities tracking) https://goo.gl/9ZvkLS (google shared drive with presentations and diagrams) IRC: #kronosnet on Freenode https://lists.kronosnet.org/mailman/listinfo/users https://lists.kronosnet.org/mailman/listinfo/devel https://lists.kronosnet.org/mailman/listinfo/commits Cheers, The knet developer team

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kronosnet v1.8 released
by Fabio M. Di Nitto 27 Mar '19

27 Mar '19

All, We are pleased to announce the general availability of kronosnet v1.8 kronosnet (or knet for short) is the new underlying network protocol for Linux HA components (corosync), that features ability to use multiple links between nodes, active/active and active/passive link failover policies, automatic link recovery, FIPS compliant encryption (nss and/or openssl), automatic PMTUd and in general better performances compared to the old network protocol. Highlights in this release: * Fixed SCTP transport on FreeBSD. * Fixed a potential use-after-free that could lead to a crash when unconfiguring links at runtime. * Fixed a link configuration error that would allow a user to configure, for example, an IPv4 source address and an IPv6 causing knet to spin at 100% of the CPU. * Minor man pages fixes and improvements. * Minor build and test suite fixes. * Minor logging events fixes. Known issues in this release: * none. The source tarballs can be downloaded here: https://www.kronosnet.org/releases/ Upstream resources and contacts: https://kronosnet.org/ https://github.com/kronosnet/kronosnet/ https://ci.kronosnet.org/ https://trello.com/kronosnet (TODO list and activities tracking) https://goo.gl/9ZvkLS (google shared drive with presentations and diagrams) IRC: #kronosnet on Freenode https://lists.kronosnet.org/mailman/listinfo/users https://lists.kronosnet.org/mailman/listinfo/devel https://lists.kronosnet.org/mailman/listinfo/commits Cheers, The knet developer team

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kronosnet v1.7 released
by Fabio M. Di Nitto 30 Jan '19

30 Jan '19

All, We are pleased to announce the general availability of kronosnet v1.7 kronosnet (or knet for short) is the new underlying network protocol for Linux HA components (corosync), that features ability to use multiple links between nodes, active/active and active/passive link failover policies, automatic link recovery, FIPS compliant encryption (nss and/or openssl), automatic PMTUd and in general better performances compared to the old network protocol. Highlights in this release: * Fix minor issues with libnozzle man pages * SCTP: support more kernel versions * Better debugging information of internal threads status * Fix build with gcc9 * [developers] expose API version in libknet.h and enable all compiler warnings at build time Known issues in this release: * libnozzle needs better porting to FreeBSD (even tho it works as-is). The source tarballs can be downloaded here: https://www.kronosnet.org/releases/ Upstream resources and contacts: https://kronosnet.org/ https://github.com/kronosnet/kronosnet/ https://ci.kronosnet.org/ https://trello.com/kronosnet (TODO list and activities tracking) https://goo.gl/9ZvkLS (google shared drive with presentations and diagrams) IRC: #kronosnet on Freenode https://lists.kronosnet.org/mailman/listinfo/users https://lists.kronosnet.org/mailman/listinfo/devel https://lists.kronosnet.org/mailman/listinfo/commits Cheers, The knet developer team

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How does kronosnet relate to/compare with Transparent Inter Process Communication (TIPC)
by Jan Pokorný 28 Dec '18

28 Dec '18

Hello list, sometimes, usually when surfing semi-randomly, I get to know about things that either resemble deja vu to me, or make me feel that I must have lived in an utter ignorance/tunnel so far. Now, both thing combined: https://en.wikipedia.org/wiki/Transparent_Inter-process_Communication Especially now that I checked the kernel module and userspace utility lurk on my Linux machine without ever being asked :-) $ { eval modinfo\ {-F\ description\ ,-F\ version\ ,-F\ license\ }tipc\; echo; tipc -h; } > TIPC: Transparent Inter Process Communication > 2.0.0 > Dual BSD/GPL > > Transparent Inter-Process Communication Protocol > Usage: tipc [OPTIONS] COMMAND [ARGS] ... > > Options: > -h, --help Print help for last given command > > Commands: > bearer - Show or modify bearers > link - Show or modify links > media - Show or modify media > nametable - Show nametable > node - Show or modify node related parameters > peer - Peer related operations > socket - Show sockets Naturally, I am curious how much of an overlap is there, wether there have been any comparisons/benchmarks conducted, all the these sort of things incl. whether the was an a priori knowledge, perhaps inspirational, about this other project. Kronosnet looks to me more on the pragmatically usable and simple side, buying also better portability and avoiding complexities (I take the plugins more like a "look what we can offload from your application layer" demonstration, yet encryption/auth/integrity protection makes a great deal of sense there) beyond UDP (which fully suffices when combined with corosync), something that TIPC covers as well while providing a lot of other abstractions incl. peer discovery, bells and unicorns (which might be heavy overkill for that use case). Any inputs welcome. -- Jan (Poki)

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kronosnet v1.6 released
by Fabio M. Di Nitto 19 Dec '18

19 Dec '18

All, We are pleased to announce the general availability of kronosnet v1.6 kronosnet (or knet for short) is the new underlying network protocol for Linux HA components (corosync), that features ability to use multiple links between nodes, active/active and active/passive link failover policies, automatic link recovery, FIPS compliant encryption (nss and/or openssl), automatic PMTUd and in general better performances compared to the old network protocol. Highlights in this release: * [IMPORTANT] Fix a PMTUd packet size issue when using crypto communications * Fix build with older versions of openssl * Fix a CPU spinning issue when iptables are set incorrectly * Fix a SCTP kernel <-> userland compatibility issue * Minor other fixes across the code and build infrastructure * libnozzle hits the first GA release. There are currently NO supported apps/users for this library but soon(´ish) corosync will add support for it. As this is the first release please be gentle :) Known issues in this release: * libnozzle needs better porting to FreeBSD (even tho it works as-is). The source tarballs can be downloaded here: https://www.kronosnet.org/releases/ Upstream resources and contacts: https://kronosnet.org/ https://github.com/kronosnet/kronosnet/ https://ci.kronosnet.org/ https://trello.com/kronosnet (TODO list and activities tracking) https://goo.gl/9ZvkLS (google shared drive with presentations and diagrams) IRC: #kronosnet on Freenode https://lists.kronosnet.org/mailman/listinfo/users https://lists.kronosnet.org/mailman/listinfo/devel https://lists.kronosnet.org/mailman/listinfo/commits Cheers, The knet developer team

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