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nghttp2/doc/nghttpx.1.rst

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nghttpx(1)
==========
SYNOPSIS
--------
**nghttpx** [OPTIONS]... [<PRIVATE_KEY> <CERT>]
DESCRIPTION
-----------
A reverse proxy for HTTP/2, HTTP/1 and SPDY.
.. describe:: <PRIVATE_KEY>
Set path to server's private key. Required
unless :option:`-p`\, :option:`--client` or :option:`\--frontend-no-tls` are
given.
.. describe:: <CERT>
Set path to server's certificate. Required
unless :option:`-p`\, :option:`--client` or :option:`\--frontend-no-tls` are
given.
OPTIONS:
--------
The options are categorized into several groups.
Connections:
~~~~~~~~~~~~
.. option:: -b, --backend=<HOST,PORT>
Set backend host and port. For HTTP/1 backend,
multiple backend addresses are accepted by
repeating this option. HTTP/2 backend does not
support multiple backend addresses and the first
occurrence of this option is used.
Default: ``127.0.0.1,80``
.. option:: -f, --frontend=<HOST,PORT>
Set frontend host and port. If <HOST> is '\*', it
assumes all addresses including both IPv4 and
IPv6.
Default: ``*,3000``
.. option:: --backlog=<NUM>
Set listen backlog size. If :option:`-1` is given,
libevent will choose suitable value.
Default: ``128``
.. option:: --backend-ipv4
Resolve backend hostname to IPv4 address only.
.. option:: --backend-ipv6
Resolve backend hostname to IPv6 address only.
.. option:: --backend-http-proxy-uri=<URI>
Specify proxy URI in the form
http://[<USER>:<PASS>@]<PROXY>:<PORT>. If a
proxy requires authentication, specify <USER> and
<PASS>. Note that they must be properly
percent-encoded. This proxy is used when the
backend connection is HTTP/2. First, make a
CONNECT request to the proxy and it connects to
the backend on behalf of nghttpx. This forms
tunnel. After that, nghttpx performs SSL/TLS
handshake with the downstream through the tunnel.
The timeouts when connecting and making CONNECT
request can be specified by
:option:`--backend-read-timeout` and
:option:`--backend-write-timeout` options.
Performance:
~~~~~~~~~~~~
.. option:: -n, --workers=<CORES>
Set the number of worker threads.
Default: ``1``
.. option:: --read-rate=<RATE>
Set maximum average read rate on frontend
connection. Setting 0 to this option means read
rate is unlimited.
Default: ``0``
.. option:: --read-burst=<SIZE>
Set maximum read burst size on frontend
connection. Setting 0 to this option means read
burst size is unlimited.
Default: ``0``
.. option:: --write-rate=<RATE>
Set maximum average write rate on frontend
connection. Setting 0 to this option means write
rate is unlimited.
Default: ``0``
.. option:: --write-burst=<SIZE>
Set maximum write burst size on frontend
connection. Setting 0 to this option means write
burst size is unlimited.
Default: ``0``
.. option:: --worker-read-rate=<RATE>
Set maximum average read rate on frontend
connection per worker. Setting 0 to this option
means read rate is unlimited. Not implemented
yet.
Default: ``0``
.. option:: --worker-read-burst=<SIZE>
Set maximum read burst size on frontend
connection per worker. Setting 0 to this option
means read burst size is unlimited. Not
implemented yet.
Default: ``0``
.. option:: --worker-write-rate=<RATE>
Set maximum average write rate on frontend
connection per worker. Setting 0 to this option
means write rate is unlimited. Not implemented
yet.
Default: ``0``
.. option:: --worker-write-burst=<SIZE>
Set maximum write burst size on frontend
connection per worker. Setting 0 to this option
means write burst size is unlimited. Not
implemented yet.
Default: ``0``
.. option:: --worker-frontend-connections=<NUM>
Set maximum number of simultaneous connections
frontend accepts. Setting 0 means unlimited.
Default: ``0``
.. option:: --backend-http1-connections-per-host=<NUM>
Set maximum number of backend concurrent HTTP/1
connections per host. This option is meaningful
when :option:`-s` option is used. To limit the number of
connections per frontend for default mode, use
:option:`--backend-http1-connections-per-frontend`\.
Default: ``8``
.. option:: --backend-http1-connections-per-frontend=<NUM>
Set maximum number of backend concurrent HTTP/1
connections per frontend. This option is only
used for default mode. 0 means unlimited. To
limit the number of connections per host for
HTTP/2 or SPDY proxy mode (-s option), use
:option:`--backend-http1-connections-per-host`\.
Default: ``0``
.. option:: --rlimit-nofile=<N>
Set maximum number of open files (RLIMIT_NOFILE)
to <N>. If 0 is given, nghttpx does not set the
limit.
Default: ``0``
Timeout:
~~~~~~~~
.. option:: --frontend-http2-read-timeout=<SEC>
Specify read timeout for HTTP/2 and SPDY frontend
connection.
Default: ``180``
.. option:: --frontend-read-timeout=<SEC>
Specify read timeout for HTTP/1.1 frontend
connection.
Default: ``180``
.. option:: --frontend-write-timeout=<SEC>
Specify write timeout for all frontend
connections.
Default: ``30``
.. option:: --stream-read-timeout=<SEC>
Specify read timeout for HTTP/2 and SPDY streams.
0 means no timeout.
Default: ``0``
.. option:: --stream-write-timeout=<SEC>
Specify write timeout for HTTP/2 and SPDY
streams. 0 means no timeout.
Default: ``0``
.. option:: --backend-read-timeout=<SEC>
Specify read timeout for backend connection.
Default: ``180``
.. option:: --backend-write-timeout=<SEC>
Specify write timeout for backend connection.
Default: ``30``
.. option:: --backend-keep-alive-timeout=<SEC>
Specify keep-alive timeout for backend
connection.
Default: ``600``
.. option:: --listener-disable-timeout=<SEC>
After accepting connection failed, connection
listener is disabled for a given time in seconds.
Specifying 0 disables this feature.
Default: ``0``
SSL/TLS:
~~~~~~~~
.. option:: --ciphers=<SUITE>
Set allowed cipher list. The format of the
string is described in OpenSSL ciphers(1).
.. option:: -k, --insecure
Don't verify backend server's certificate if :option:`-p`\,
:option:`--client` or :option:`\--http2-bridge` are given and
:option:`--backend-no-tls` is not given.
.. option:: --cacert=<PATH>
Set path to trusted CA certificate file if :option:`-p`\,
:option:`--client` or :option:`\--http2-bridge` are given and
:option:`--backend-no-tls` is not given. The file must be
in PEM format. It can contain multiple
certificates. If the linked OpenSSL is
configured to load system wide certificates, they
are loaded at startup regardless of this option.
.. option:: --private-key-passwd-file=<FILEPATH>
Path to file that contains password for the
server's private key. If none is given and the
private key is password protected it'll be
requested interactively.
.. option:: --subcert=<KEYPATH>:<CERTPATH>
Specify additional certificate and private key
file. nghttpx will choose certificates based on
the hostname indicated by client using TLS SNI
extension. This option can be used multiple
times.
.. option:: --backend-tls-sni-field=<HOST>
Explicitly set the content of the TLS SNI
extension. This will default to the backend HOST
name.
.. option:: --dh-param-file=<PATH>
Path to file that contains DH parameters in PEM
format. Without this option, DHE cipher suites
are not available.
.. option:: --npn-list=<LIST>
Comma delimited list of ALPN protocol identifier
sorted in the order of preference. That means
most desirable protocol comes first. This is
used in both ALPN and NPN. The parameter must be
delimited by a single comma only and any white
spaces are treated as a part of protocol string.
Default: ``h2-16,h2-14,spdy/3.1,http/1.1``
.. option:: --verify-client
Require and verify client certificate.
.. option:: --verify-client-cacert=<PATH>
Path to file that contains CA certificates to
verify client certificate. The file must be in
PEM format. It can contain multiple
certificates.
.. option:: --client-private-key-file=<PATH>
Path to file that contains client private key
used in backend client authentication.
.. option:: --client-cert-file=<PATH>
Path to file that contains client certificate
used in backend client authentication.
.. option:: --tls-proto-list=<LIST>
Comma delimited list of SSL/TLS protocol to be
enabled. The following protocols are available:
TLSv1.2, TLSv1.1 and TLSv1.0. The name matching
is done in case-insensitive manner. The
parameter must be delimited by a single comma
only and any white spaces are treated as a part
of protocol string.
Default: ``TLSv1.2,TLSv1.1``
.. option:: --tls-ticket-key-file=<FILE>
Path to file that contains 48 bytes random data
to construct TLS session ticket parameters. This
options can be used repeatedly to specify
multiple ticket parameters. If several files are
given, only the first key is used to encrypt TLS
session tickets. Other keys are accepted but
server will issue new session ticket with first
key. This allows session key rotation. Please
note that key rotation does not occur
automatically. User should rearrange files or
change options values and restart nghttpx
gracefully. If opening or reading given file
fails, all loaded keys are discarded and it is
treated as if none of this option is given. If
this option is not given or an error occurred
while opening or reading a file, key is generated
automatically and renewed every 12hrs. At most 2
keys are stored in memory.
HTTP/2 and SPDY:
~~~~~~~~~~~~~~~~
.. option:: -c, --http2-max-concurrent-streams=<NUM>
Set the maximum number of the concurrent streams
in one HTTP/2 and SPDY session.
Default: ``100``
.. option:: --frontend-http2-window-bits=<N>
Sets the per-stream initial window size of HTTP/2
SPDY frontend connection. For HTTP/2, the size
is 2**<N>-1. For SPDY, the size is 2\*\*<N>.
Default: ``16``
.. option:: --frontend-http2-connection-window-bits=<N>
Sets the per-connection window size of HTTP/2 and
SPDY frontend connection. For HTTP/2, the size
is 2**<N>-1. For SPDY, the size is 2\*\*<N>.
Default: ``16``
.. option:: --frontend-no-tls
Disable SSL/TLS on frontend connections.
.. option:: --backend-http2-window-bits=<N>
Sets the initial window size of HTTP/2 backend
connection to 2**<N>-1.
Default: ``16``
.. option:: --backend-http2-connection-window-bits=<N>
Sets the per-connection window size of HTTP/2
backend connection to 2\*\*<N>-1.
Default: ``16``
.. option:: --backend-no-tls
Disable SSL/TLS on backend connections.
.. option:: --http2-no-cookie-crumbling
Don't crumble cookie header field.
.. option:: --padding=<N>
Add at most <N> bytes to a HTTP/2 frame payload
as padding. Specify 0 to disable padding. This
option is meant for debugging purpose and not
intended to enhance protocol security.
Mode:
~~~~~
.. describe:: (default mode)
Accept HTTP/2, SPDY and HTTP/1.1 over SSL/TLS.
If :option:`--frontend-no-tls` is used, accept HTTP/2 and
HTTP/1.1. The incoming HTTP/1.1 connection can
be upgraded to HTTP/2 through HTTP Upgrade. The
protocol to the backend is HTTP/1.1.
.. option:: -s, --http2-proxy
Like default mode, but enable secure proxy mode.
.. option:: --http2-bridge
Like default mode, but communicate with the
backend in HTTP/2 over SSL/TLS. Thus the
incoming all connections are converted to HTTP/2
connection and relayed to the backend. See
:option:`--backend-http-proxy-uri` option if you are behind
the proxy and want to connect to the outside
HTTP/2 proxy.
.. option:: --client
Accept HTTP/2 and HTTP/1.1 without SSL/TLS. The
incoming HTTP/1.1 connection can be upgraded to
HTTP/2 connection through HTTP Upgrade. The
protocol to the backend is HTTP/2. To use
nghttpx as a forward proxy, use :option:`-p` option
instead.
.. option:: -p, --client-proxy
Like :option:`--client` option, but it also requires the
request path from frontend must be an absolute
URI, suitable for use as a forward proxy.
Logging:
~~~~~~~~
.. option:: -L, --log-level=<LEVEL>
Set the severity level of log output. <LEVEL>
must be one of INFO, NOTICE, WARN, ERROR and
FATAL.
Default: ``NOTICE``
.. option:: --accesslog-file=<PATH>
Set path to write access log. To reopen file,
send USR1 signal to nghttpx.
.. option:: --accesslog-syslog
Send access log to syslog. If this option is
used, :option:`--accesslog-file` option is ignored.
.. option:: --accesslog-format=<FORMAT>
Specify format string for access log. The
default format is combined format. The following
variables are available:
* $remote_addr: client IP address.
* $time_local: local time in Common Log format.
* $time_iso8601: local time in ISO 8601 format.
* $request: HTTP request line.
* $status: HTTP response status code.
* $body_bytes_sent: the number of bytes sent to
client as response body.
* $http_<VAR>: value of HTTP request header <VAR>
where '_' in <VAR> is replaced with '-'.
* $remote_port: client port.
* $server_port: server port.
* $request_time: request processing time in
seconds with milliseconds resolution.
* $pid: PID of the running process.
* $alpn: ALPN identifier of the protocol which
generates the response. For HTTP/1, ALPN is
always http/1.1, regardless of minor version.
Default: ``$remote_addr - - [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent"``
.. option:: --errorlog-file=<PATH>
Set path to write error log. To reopen file,
send USR1 signal to nghttpx.
Default: ``/dev/stderr``
.. option:: --errorlog-syslog
Send error log to syslog. If this option is
used, :option:`--errorlog-file` option is ignored.
.. option:: --syslog-facility=<FACILITY>
Set syslog facility to <FACILITY>.
Default: ``daemon``
Misc:
~~~~~
.. option:: --add-x-forwarded-for
Append X-Forwarded-For header field to the
downstream request.
.. option:: --strip-incoming-x-forwarded-for
Strip X-Forwarded-For header field from inbound
client requests.
.. option:: --no-via
Don't append to Via header field. If Via header
field is received, it is left unaltered.
.. option:: --no-location-rewrite
Don't rewrite location header field on
:option:`--http2-bridge`\, :option:`--client` and default mode. For
:option:`--http2-proxy` and :option:`\--client-proxy` mode, location
header field will not be altered regardless of
this option.
.. option:: --altsvc=<PROTOID,PORT[,HOST,[ORIGIN]]>
Specify protocol ID, port, host and origin of
alternative service. <HOST> and <ORIGIN> are
optional. They are advertised in alt-svc header
field or HTTP/2 ALTSVC frame. This option can be
used multiple times to specify multiple
alternative services. Example: :option:`--altsvc`\=h2,443
.. option:: --add-response-header=<HEADER>
Specify additional header field to add to
response header set. This option just appends
header field and won't replace anything already
set. This option can be used several times to
specify multiple header fields.
Example: :option:`--add-response-header`\="foo: bar"
.. option:: --frontend-http2-dump-request-header=<PATH>
Dumps request headers received by HTTP/2 frontend
to the file denoted in <PATH>. The output is
done in HTTP/1 header field format and each
header block is followed by an empty line. This
option is not thread safe and MUST NOT be used
with option :option:`-n`\<N>, where <N> >= 2.
.. option:: --frontend-http2-dump-response-header=<PATH>
Dumps response headers sent from HTTP/2 frontend
to the file denoted in <PATH>. The output is
done in HTTP/1 header field format and each
header block is followed by an empty line. This
option is not thread safe and MUST NOT be used
with option :option:`-n`\<N>, where <N> >= 2.
.. option:: -o, --frontend-frame-debug
Print HTTP/2 frames in frontend to stderr. This
option is not thread safe and MUST NOT be used
with option :option:`-n`\=N, where N >= 2.
.. option:: -D, --daemon
Run in a background. If :option:`-D` is used, the current
working directory is changed to '*/*'.
.. option:: --pid-file=<PATH>
Set path to save PID of this program.
.. option:: --user=<USER>
Run this program as <USER>. This option is
intended to be used to drop root privileges.
.. option:: --conf=<PATH>
Load configuration from <PATH>.
Default: ``/etc/nghttpx/nghttpx.conf``
.. option:: -v, --version
Print version and exit.
.. option:: -h, --help
Print this help and exit.
FILES
-----
*/etc/nghttpx/nghttpx.conf*
The default configuration file path nghttpx searches at startup.
The configuration file path can be changed using :option:`--conf`
option.
Those lines which are staring ``#`` are treated as comment.
The option name in the configuration file is the long command-line
option name with leading ``--`` stripped (e.g., ``frontend``). Put
``=`` between option name and value. Don't put extra leading or
trailing spaces.
The options which do not take argument in the command-line *take*
argument in the configuration file. Specify ``yes`` as an argument
(e.g., ``http2-proxy=yes``). If other string is given, it is
ignored.
To specify private key and certificate file which are given as
positional arguments in commnad-line, use ``private-key-file`` and
``certificate-file``.
:option:`--conf` option cannot be used in the configuration file and
will be ignored if specified.
SIGNALS
-------
SIGQUIT
Shutdown gracefully. First accept pending connections and stop
accepting connection. After all connections are handled, nghttpx
exits.
SIGUSR1
Reopen log files.
SIGUSR2
Fork and execute nghttpx. It will execute the binary in the same
path with same command-line arguments and environment variables.
After new process comes up, sending SIGQUIT to the original process
to perform hot swapping.
SEE ALSO
--------
:manpage:`nghttp(1)`, :manpage:`nghttpd(1)`, :manpage:`h2load(1)`
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