Public bug reported: Haproxy can work correctly with wight 256, the node with weight 256 either takes all the traffic or takes none traffic:
1-1 weight: web1:256, web2:1, web3:1 (incorrect case.) (1024 accesses * 3 times to vip) result 1 web1: 1024 web2: 0 web3: 0 result 2 web1: 1024 web2: 0 web3: 0 result 3 web1 counted: 1024 web2 counted: 0 web3 counted: 0 1-2 weight: web1:255, web2:1, web3:1 (correct case.) (1024 accesses * 3 times to vip) result 1 web1 counted: 1017 web2 counted: 4 web3 counted: 3 result 2 web1 counted: 1016 web2 counted: 4 web3 counted: 4 result 3 web1 counted: 1016 web2 counted: 4 web3 counted: 4 2-1 web1:256, web2:128, web3:128 (incorrect case.) (256 accesses * 3 times to vip) result 1 web1 counted: 1 web2 counted: 128 web3 counted: 127 result 2 web1 counted: 0 web2 counted: 128 web3 counted: 128 result 3 web1 counted: 0 web2 counted: 128 web3 counted: 128 2-2 web1:255, web2:128, web3:128(correct case.) (256 accesses * 3 times to vip) result 1 web1 counted: 128 web2 counted: 64 web3 counted: 64 result 2 web1 counted: 128 web2 counted: 64 web3 counted: 64 result 3 web1 counted: 128 web2 counted: 64 web3 counted: 64 >From the haproxy aspect, they have fixed a bug of "Roundrobin can not work well when a server's weight is 256" , make sure that below patch has been used on above environment. Mail of "Roundrobin can not work well when a server's weight is 256" https://www.mail-archive.com/haproxy@formilux.org/msg10613.html Patch: https://dev.openwrt.org/browser/packages/net/haproxy/patches/0005-BUG-MEDIUM-server-set-the-macro-for-server-s-max-wei.patch ** Affects: haproxy (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1308314 Title: incorrect balancing in weight value 256 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/haproxy/+bug/1308314/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
