Haproxy 1.6-dev2 正式發布，Web 負載均衡
HAProxy提供高可用性、負載均衡以及基于TCP和HTTP應用的代理，支持虛擬主機， 它是免費、快速并且可靠的一種解決方案。HAProxy特別適用于那些負載特大的web站點， 這些站點通常又需要會話保持或七層處理。HAProxy運行在當前的硬件上，完全可以支持數以萬計的并發連接。并且它的運行模式使得它可以很簡單安全的整 合進您當前的架構中， 同時可以保護你的web服務器不被暴露到網絡上。
下圖是HAProxy的架構：
- DNS-based server name resolution : haproxy is now able to periodically ask a set of resolvers for the IP address of some servers and to update them without restarting. This will make life much easier for people running in AWS where IP address change randomly. Some more stuff was planned for this such as marking the server as unresolvable if resolving fails, but we found that people would probably like to have a configurable behaviour. Feedback on this is desired and will drive the next steps.- peers protocol v2 : haproxy 1.6 and 1.5 will not be able to synchronize their stick tables but on the other hand the new protocol is much better and more extensible. First it uses a single connection regardless of the number of tables to synchronize. Second it will support synchronizing much more than just stick tables. For now it replicates all stick-tables contents (including gpc, etc...). This allows reloads to keep entries, rates, etc... as well as to pass them to a backup node in case of a switchover. It's very likely that during 1.7 development we'll further extend the amount of information that can be exchanged.</pre>更多內容請查看 更新日志。
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