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server.feature-flags option

Description

server-wide feature control for selected features (since 1.4.56)

server.feature-flags = ( "..." => "..." )

Example:
server.feature-flags = ( "server.h2proto" => "enable", "server.h2c" => "enable" )

Options

option description notes
"server.h2proto" => "enable" HTTP/2 support (default: enable (since 1.4.59)) (since 1.4.56)
"server.h2c" => "enable" HTTP/2 cleartext support (Upgrade: h2c) (default: enable (since 1.4.59))
(requires "server.h2proto" => "enable" to enable)
(since 1.4.56)
"server.graceful-shutdown-timeout" => 15 max num of secs to wait for existing requests to complete during graceful restart (default: infinite)
(slow requests are aborted after timeout to allow graceful restart to proceed)
(since 1.4.56)
"server.graceful-restart-bg" => "enable" immediate graceful restart while existing requests complete in background process (default: disable)
(experimental) Recommended: server.systemd-socket-activation = "enable"
(since 1.4.56)
"server.clock-jump-restart" => 1800 trigger graceful restart if clock jumps more than defined threshold (default: 1800 (30 min))
(if triggered, "server.graceful-shutdown-timeout" forced to 5 sec)
(since 1.4.60)
"server.errorlog-high-precision" => "disable" high-precision timestamps in errorlog trace (default: disable) (since 1.4.60)

behavior change; compatibility flags

"server.h2-discard-backend-1xx" => "disable" discard 1xx responses from backend (other than 101) when client is HTTP/2 (default: disable)
default: relay 1xx from backend when client is HTTP/2, e.g. 103 Early Hints
(since 1.4.56)
"server.h1-discard-backend-1xx" => "disable" discard 1xx responses from backend (other than 101) when client is HTTP/1.x (default: disable)
default: relay 1xx from backend when client is HTTP/1.1, e.g. 103 Early Hints
(since 1.4.56)
"server.absolute-dir-redirect" => "disable" use fully qualified URI in automatic redirect to directory (default: disable)
default: use relative url-path (better abstraction) in automatic redirect to directory
(since 1.4.56)
"proxy.force-http10" => "disable" force proxy requests to backend to use HTTP/1.0 (default: disable)
default: send requests to backend using HTTP/1.1
(since 1.4.56)
"ssl.session-cache" => "disable" server-side TLS session id cache (default: disable)
default: use TLS session tickets (stateless on server-side)
(since 1.4.56)
"cgi.tempfile-accum" => "enable" accumulate request body in single temporary file if not streaming request body to backend (default: enable)
default: temporary file is passed as CGI stdin when request body > 64k
(can be disabled if backend immediately reads request body into another temporary file,
doubling disk space use on a filesystem with limited size)
(since 1.4.60)
"chunkqueue.splice" => "enable" splice() data into temporary files (Linux) (default: enable) (since 1.4.60)

Updated by gstrauss about 1 month ago · 9 revisions