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125 lines
3.9 KiB
Plaintext
125 lines
3.9 KiB
Plaintext
Medium-long term roadmap - 2014/06/19
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Legend: '+' = done, '-' = todo, '*' = done except doc
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1.6 or later :
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- POST parameter extraction and size/speed measurement to use in ACLs
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- return-html code xxx [ file "xxx" | text "xxx" ] if <acl>
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- return-raw [ file "xxx" | text "xxx" ] if <acl>
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- avg connect time, response time, connect errors, response errors in stats
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- add the ability to only dump response errors to more easily detect
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anomalies without being polluted with attacks in requests.
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- have multi-criteria analysers which subscribe to req flags, rsp flags, and
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stream interface changes. This would result in a single analyser to wait
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for the end of data transfer in HTTP.
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- implement support for "connection freeze" after accept. A list of frozen
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connections should be maintained so that it is possible to recycle them
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when new file descriptors are required.
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- support for time-ordered priority queues with ability to add an offset
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based on request matching. Each session will have one ebtree node to be
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attached to whatever queue the session is waiting in.
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- add a flag in logs to indicate keep-alive requests ?
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- make it possible to condition a timeout on an ACL (dynamic timeouts)
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- forwardfor/originalto except with IPv6
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- remove lots of remaining Alert() calls or ensure that they forward to
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send_log() after the fork.
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- tcp-request session
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- tcp-request session expect-proxy {L4|L5} if ...
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- http-request track-sc* to avoid having the ugly "if !HTTP" in tcp-request
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- wait on resource (time, mem, CPU, socket, buffers, server's conn, server's rate, ...)
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- bandwidth limits
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- create internal services and make stats, CLI, etc... part of that.
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- buddy servers to build defined lists of failovers. Detect loops during
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the config check.
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server XXX buddy YYY
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server YYY # may replace XXX when XXX fails
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- spare servers : servers which are used in LB only when a minimum farm
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weight threshold is not satisfied anymore. Useful for inter-site LB with
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local pref by default.
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- add support for event-triggered epoll, and maybe change all events handling
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to pass through an event cache to handle temporarily disabled events.
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- evaluate the changes required for multi-process+shared mem or multi-thread
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+thread-local+fast locking.
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- ability to decide whether to drain or kill sessions when putting a server
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to maintenance mode => requires a per-server session list and the change
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above.
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Old, maybe obsolete points :
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- clarify licence by adding a 'MODULE_LICENCE("GPL")' or something equivalent.
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- 3 memory models : failsafe (prealloc), normal (current), optimal (alloc on
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demand)
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- implement support for event-triggerred epoll()
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- verify if it would be worth implementing an epoll_ctl_batch() for Linux
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- option minservers XXX : activates some spare servers when active servers
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are insufficient
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- new keyword 'check' : check http xxx, check smtp xxx, check ssl-hello
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- initcwnd parameter for bind sockets : needed in kernel first
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- have a callback function which would be called after a server is selected,
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for header post-processing. That would be mainly used to remove then add
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the server's name or cookie in a header so that the server knows it.
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Unsorted :
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- outgoing log load-balancing (round-robin or hash among multiple servers)
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- internal socket for "server XXX frontend:name"
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- HTTP/2.0
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- DNS requests on health checks
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- XML inspection (content-switching for SOAP requests)
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- sync all stick-tables data, not just serverid.
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- request, session and user variables
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- random cookie generator
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- external checker
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- fastcgi to servers
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- hot config reload
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- RAM-based cache for small files
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- RHI - BGP
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- telnet/SSH cli
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- dynamic memory allocation
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- dynamic weights based on check response headers and traffic response time
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- various kernel-level acceleration (multi-accept, ssplice, epoll2...)
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