nghttpx: Update doc
This commit is contained in:
Tatsuhiro Tsujikawa
parent
2326337d32
commit
df6466cfbd
82
README.rst
82
README.rst
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@ -655,46 +655,38 @@ HTTP/2. ``nghttpx`` also offers the functionality to share session
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cache and ticket keys among multiple ``nghttpx`` instances via
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memcached.
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``nghttpx`` has several operational modes:
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``nghttpx`` has 2 operation modes:
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================== ============================ ============== =============
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================== ====================== =================== =============
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Mode option Frontend Backend Note
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================== ============================ ============== =============
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default mode HTTP/2, SPDY, HTTP/1.1 (TLS) HTTP/1.1 Reverse proxy
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``--http2-proxy`` HTTP/2, SPDY, HTTP/1.1 (TLS) HTTP/1.1 SPDY proxy
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``--http2-bridge`` HTTP/2, SPDY, HTTP/1.1 (TLS) HTTP/2 (TLS)
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``--client`` HTTP/2, HTTP/1.1 HTTP/2 (TLS)
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``--client-proxy`` HTTP/2, HTTP/1.1 HTTP/2 (TLS) Forward proxy
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================== ============================ ============== =============
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================== ====================== =================== =============
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default mode HTTP/2, SPDY, HTTP/1.1 HTTP/1.1, HTTP/2 Reverse proxy
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``--http2-proxy`` HTTP/2, SPDY, HTTP/1.1 HTTP/1.1, or HTTP/2 Forward proxy
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================== ====================== =================== =============
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The interesting mode at the moment is the default mode. It works like
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a reverse proxy and listens for HTTP/2, SPDY and HTTP/1.1 and can be
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deployed as a SSL/TLS terminator for existing web server.
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The default mode, ``--http2-proxy`` and ``--http2-bridge`` modes use
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SSL/TLS in the frontend connection by default. To disable SSL/TLS,
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use the ``--frontend-no-tls`` option. If that option is used, SPDY is
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disabled in the frontend and incoming HTTP/1.1 connections can be
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upgraded to HTTP/2 through HTTP Upgrade. In these modes, HTTP/1
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backend connections are cleartext by default. To enable TLS, use
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``--backend-http1-tls`` opiton.
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The ``--http2-bridge``, ``--client`` and ``--client-proxy`` modes use
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SSL/TLS in the backend connection by default. To disable SSL/TLS, use
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the ``--backend-no-tls`` option.
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In all modes, the frontend connections are encrypted by SSL/TLS by
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default. To disable encryption, use the ``--frontend-no-tls`` option.
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If encryption is disabled, SPDY is disabled in the frontend and
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incoming HTTP/1.1 connections can be upgraded to HTTP/2 through HTTP
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Upgrade. On the other hard, backend connections are not encrypted by
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default. To encrypt backend connections, use ``--backend-tls``
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option.
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``nghttpx`` supports a configuration file. See the ``--conf`` option and
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sample configuration file ``nghttpx.conf.sample``.
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In the default mode, (without any of ``--http2-proxy``,
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``--http2-bridge``, ``--client-proxy`` and ``--client`` options),
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``nghttpx`` works as reverse proxy to the backend server::
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In the default mode, ``nghttpx`` works as reverse proxy to the backend
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server::
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Client <-- (HTTP/2, SPDY, HTTP/1.1) --> nghttpx <-- (HTTP/1.1) --> Web Server
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Client <-- (HTTP/2, SPDY, HTTP/1.1) --> nghttpx <-- (HTTP/1.1, HTTP/2) --> Web Server
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[reverse proxy]
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With the ``--http2-proxy`` option, it works as a so called secure proxy (aka
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SPDY proxy)::
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With the ``--http2-proxy`` option, it works as forward proxy, and it
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is so called secure HTTP/2 proxy (aka SPDY proxy)::
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Client <-- (HTTP/2, SPDY, HTTP/1.1) --> nghttpx <-- (HTTP/1.1) --> Proxy
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[secure proxy] (e.g., Squid, ATS)
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@ -702,9 +694,9 @@ SPDY proxy)::
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The ``Client`` in the above example needs to be configured to use
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``nghttpx`` as secure proxy.
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At the time of this writing, Chrome is the only browser which supports
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secure proxy. One way to configure Chrome to use a secure proxy is
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to create a proxy.pac script like this:
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At the time of this writing, both Chrome and Firefox support secure
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HTTP/2 proxy. One way to configure Chrome to use a secure proxy is to
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create a proxy.pac script like this:
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.. code-block:: javascript
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@ -720,37 +712,9 @@ Then run Chrome with the following arguments::
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$ google-chrome --proxy-pac-url=file:///path/to/proxy.pac --use-npn
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With ``--http2-bridge``, it accepts HTTP/2, SPDY and HTTP/1.1
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connections and communicates with the backend in HTTP/2::
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Client <-- (HTTP/2, SPDY, HTTP/1.1) --> nghttpx <-- (HTTP/2) --> Web or HTTP/2 Proxy etc
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(e.g., nghttpx -s)
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With ``--client-proxy``, it works as a forward proxy and expects
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that the backend is an HTTP/2 proxy::
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Client <-- (HTTP/2, HTTP/1.1) --> nghttpx <-- (HTTP/2) --> HTTP/2 Proxy
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[forward proxy] (e.g., nghttpx -s)
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The ``Client`` needs to be configured to use nghttpx as a forward
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proxy. The frontend HTTP/1.1 connection can be upgraded to HTTP/2
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through HTTP Upgrade. With the above configuration, one can use
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HTTP/1.1 client to access and test their HTTP/2 servers.
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With ``--client``, it works as a reverse proxy and expects that
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the backend is an HTTP/2 Web server::
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Client <-- (HTTP/2, HTTP/1.1) --> nghttpx <-- (HTTP/2) --> Web Server
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[reverse proxy]
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The frontend HTTP/1.1 connection can be upgraded to HTTP/2
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through HTTP Upgrade.
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For the operation modes which talk to the backend in HTTP/2 over
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SSL/TLS, the backend connections can be tunneled through an HTTP proxy.
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The backend HTTP/2 connections can be tunneled through an HTTP proxy.
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The proxy is specified using ``--backend-http-proxy-uri``. The
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following figure illustrates the example of the ``--http2-bridge`` and
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``--backend-http-proxy-uri`` options to talk to the outside HTTP/2
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following figure illustrates how nghttpx talks to the outside HTTP/2
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proxy through an HTTP proxy::
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Client <-- (HTTP/2, SPDY, HTTP/1.1) --> nghttpx <-- (HTTP/2) --
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@ -98,12 +98,12 @@ Currently, the following restriction is applied for server push:
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This limitation may be loosened in the future release.
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nghttpx also supports server push if both frontend and backend are
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HTTP/2 (which implies :option:`--http2-bridge` or :option:`--client`).
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In this case, in addition to server push via Link header field, server
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push from backend is relayed to frontend HTTP/2 session.
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HTTP/2 in default mode. In this case, in addition to server push via
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Link header field, server push from backend is forwarded to frontend
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HTTP/2 session.
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HTTP/2 server push will be disabled if :option:`--http2-proxy` or
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:option:`--client-proxy` is used.
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HTTP/2 server push will be disabled if :option:`--http2-proxy` is
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used.
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UNIX DOMAIN SOCKET
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------------------
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@ -12,37 +12,38 @@ use-cases. It also covers some useful options later.
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Default mode
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------------
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If nghttpx is invoked without any :option:`--http2-proxy`,
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:option:`--client`, and :option:`--client-proxy`, it operates in
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default mode. In this mode, nghttpx frontend listens for HTTP/2
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requests and translates them to HTTP/1 requests. Thus it works as
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reverse proxy (gateway) for HTTP/2 clients to HTTP/1 web server. This
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is also known as "HTTP/2 router". HTTP/1 requests are also supported
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in frontend as a fallback. If nghttpx is linked with spdylay library
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and frontend connection is SSL/TLS, the frontend also supports SPDY
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If nghttpx is invoked without :option:`--http2-proxy`, it operates in
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default mode. In this mode, it works as reverse proxy (gateway) for
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both HTTP/2 and HTTP/1 clients to backend servers. This is also known
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as "HTTP/2 router". If nghttpx is linked with spdylay library and
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frontend connection is SSL/TLS, the frontend also supports SPDY
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protocol.
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By default, this mode's frontend connection is encrypted using
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SSL/TLS. So server's private key and certificate must be supplied to
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the command line (or through configuration file). In this case, the
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frontend protocol selection will be done via ALPN or NPN.
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By default, frontend connection is encrypted using SSL/TLS. So
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server's private key and certificate must be supplied to the command
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line (or through configuration file). In this case, the frontend
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protocol selection will be done via ALPN or NPN.
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With :option:`--frontend-no-tls` option, user can turn off SSL/TLS in
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frontend connection. In this case, SPDY protocol is not available
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even if spdylay library is liked to nghttpx. HTTP/2 and HTTP/1 are
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available on the frontend and a HTTP/1 connection can be upgraded to
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available on the frontend, and an HTTP/1 connection can be upgraded to
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HTTP/2 using HTTP Upgrade. Starting HTTP/2 connection by sending
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HTTP/2 connection preface is also supported.
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By default, backend HTTP/1 connections are not encrypted. To enable
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TLS on HTTP/1 backend connections, use :option:`--backend-http1-tls`
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option. This applies to all mode whose backend connections are
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HTTP/1.
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By default, backend connections are not encrypted. To enable TLS
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encryption on backend connections, use :option:`--backend-tls` option.
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Using patterns and ``proto`` keyword in :option:`--backend` option,
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backend application protocol can be specified per host/request path
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pattern. It means that you can use both HTTP/2 and HTTP/1 in backend
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connections at the same time. Note that default backend protocol is
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HTTP/1.1. To use HTTP/2 in backend, you have to specify ``h2`` in
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``proto`` keyword in :option:`--backend` explicitly.
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The backend is supposed to be HTTP/1 Web server. For example, to make
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The backend is supposed to be Web server. For example, to make
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nghttpx listen to encrypted HTTP/2 requests at port 8443, and a
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backend HTTP/1 web server is configured to listen to HTTP/1 request at
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port 8080 in the same host, run nghttpx command-line like this::
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backend Web server is configured to listen to HTTP request at port
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8080 in the same host, run nghttpx command-line like this::
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$ nghttpx -f0.0.0.0,8443 -b127.0.0.1,8080 /path/to/server.key /path/to/server.crt
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@ -58,8 +59,8 @@ If nghttpx is invoked with :option:`--http2-proxy` (or its shorthand
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:option:`-s`) option, it operates in HTTP/2 proxy mode. The supported
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protocols in frontend and backend connections are the same in `default
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mode`_. The difference is that this mode acts like forward proxy and
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assumes the backend is HTTP/1 proxy server (e.g., squid, traffic
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server). So HTTP/1 request must include absolute URI in request line.
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assumes the backend is HTTP proxy server (e.g., Squid, Apache Traffic
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Server). HTTP/1 request must include absolute URI in request line.
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By default, frontend connection is encrypted. So this mode is also
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called secure proxy. If nghttpx is linked with spdylay, it supports
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@ -68,16 +69,22 @@ SPDY protocols and it works as so called SPDY proxy.
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With :option:`--frontend-no-tls` option, SSL/TLS is turned off in
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frontend connection, so the connection gets insecure.
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The backend must be HTTP/1 proxy server. nghttpx supports multiple
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backend server addresses. It translates incoming requests to HTTP/1
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The backend must be HTTP proxy server. nghttpx supports multiple
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backend server addresses. It translates incoming requests to HTTP
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request to backend server. The backend server performs real proxy
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work for each request, for example, dispatching requests to the origin
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server and caching contents.
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The backend connection is not encrypted by default. To enable
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encryption, use :option:`--backend-tls` option. The default backend
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protocol is HTTP/1.1. To use HTTP/2 in backend connection, use
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:option:`--backend` option, and specify ``h2`` in ``proto`` keyword
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explicitly.
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For example, to make nghttpx listen to encrypted HTTP/2 requests at
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port 8443, and a backend HTTP/1 proxy server is configured to listen
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to HTTP/1 request at port 8080 in the same host, run nghttpx
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command-line like this::
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port 8443, and a backend HTTP proxy server is configured to listen to
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HTTP/1 request at port 8080 in the same host, run nghttpx command-line
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like this::
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$ nghttpx -s -f'*,8443' -b127.0.0.1,8080 /path/to/server.key /path/to/server.crt
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@ -122,126 +129,19 @@ Consult Traffic server `documentation
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to know how to configure traffic server as forward proxy and its
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security implications.
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Client mode
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-----------
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Disable frontend SSL/TLS
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------------------------
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If nghttpx is invoked with :option:`--client` option, it operates in
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client mode. In this mode, nghttpx listens for plain, unencrypted
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HTTP/2 and HTTP/1 requests and translates them to encrypted HTTP/2
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requests to the backend. User cannot enable SSL/TLS in frontend
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connection.
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The frontend connections are encrypted with SSL/TLS by default. To
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turn off SSL/TLS, use :option:`--frontend-no-tls` option. If this
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option is used, the private key and certificate are not required to
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run nghttpx.
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HTTP/1 frontend connection can be upgraded to HTTP/2 using HTTP
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Upgrade. To disable SSL/TLS in backend connection, use
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:option:`--backend-no-tls` option.
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Enable backend SSL/TLS
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----------------------
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A single HTTP/2 backend connection is shared among multiple frontend
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connections.
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The backend server is supporsed to be a HTTP/2 web server (e.g.,
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nghttpd). The one use-case of this mode is utilize existing HTTP/1
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clients to test HTTP/2 deployment. Suppose that HTTP/2 web server
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listens to port 80 without encryption. Then run nghttpx as client
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mode to access to that web server::
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$ nghttpx --client -f127.0.0.1,8080 -b127.0.0.1,80 --backend-no-tls
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.. note::
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You may need :option:`--insecure` (or its shorthand :option:`-k`)
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option if HTTP/2 server enables SSL/TLS and its certificate is
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self-signed. But please note that it is insecure, and you should
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know what you are doing.
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Then you can use curl to access HTTP/2 server via nghttpx::
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$ curl http://localhost:8080/
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Client proxy mode
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-----------------
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If nghttpx is invoked with :option:`--client-proxy` (or its shorthand
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:option:`-p`) option, it operates in client proxy mode. This mode
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behaves like `client mode`_, but it works like forward proxy. So
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HTTP/1 request must include absolute URI in request line.
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HTTP/1 frontend connection can be upgraded to HTTP/2 using HTTP
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Upgrade. To disable SSL/TLS in backend connection, use
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:option:`--backend-no-tls` option.
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A single HTTP/2 backend connection is shared among multiple frontend
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connections.
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The backend server must be a HTTP/2 proxy. You can use nghttpx in
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`HTTP/2 proxy mode`_ as backend server. The one use-case of this mode
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is utilize existing HTTP/1 clients to test HTTP/2 connections between
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2 proxies. The another use-case is use this mode to aggregate local
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HTTP/1 connections to one HTTP/2 backend encrypted connection. This
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makes HTTP/1 clients which does not support secure proxy can use
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secure HTTP/2 proxy via nghttpx client mode.
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Suppose that HTTP/2 proxy listens to port 8443, just like we saw in
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`HTTP/2 proxy mode`_. To run nghttpx in client proxy mode to access
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that server, invoke nghttpx like this::
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$ nghttpx -p -f127.0.0.1,8080 -b127.0.0.1,8443
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.. note::
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You may need :option:`--insecure` (or its shorthand :option:`-k`)
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option if HTTP/2 server's certificate is self-signed. But please
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note that it is insecure, and you should know what you are doing.
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Then you can use curl to issue HTTP request via HTTP/2 proxy::
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$ curl --http-proxy=http://localhost:8080 http://www.google.com/
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You can configure web browser to use localhost:8080 as forward
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proxy.
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HTTP/2 bridge mode
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------------------
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If nghttpx is invoked with :option:`--http2-bridge` option, it
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operates in HTTP/2 bridge mode. The supported protocols in frontend
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connections are the same in `default mode`_. The protocol in backend
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is HTTP/2 only.
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With :option:`--frontend-no-tls` option, SSL/TLS is turned off in
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frontend connection, so the connection gets insecure. To disable
|
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SSL/TLS in backend connection, use :option:`--backend-no-tls` option.
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A single HTTP/2 backend connection is shared among multiple frontend
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connections.
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The backend server is supporsed to be a HTTP/2 web server or HTTP/2
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proxy. If backend server is HTTP/2 proxy, use
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:option:`--no-location-rewrite` option to disable rewriting
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``Location`` header field.
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The use-case of this mode is aggregate the incoming connections to one
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HTTP/2 connection. One backend HTTP/2 connection is created per
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worker (thread).
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Disable SSL/TLS
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---------------
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In `default mode`_, `HTTP/2 proxy mode`_ and `HTTP/2 bridge mode`_,
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frontend connections are encrypted with SSL/TLS by default. To turn
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off SSL/TLS, use :option:`--frontend-no-tls` option. If this option
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is used, the private key and certificate are not required to run
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nghttpx.
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In `client mode`_, `client proxy mode`_ and `HTTP/2 bridge mode`_,
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backend connections are encrypted with SSL/TLS by default. To turn
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off SSL/TLS, use :option:`--backend-no-tls` option.
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Enable SSL/TLS on HTTP/1 backend
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--------------------------------
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In all modes which use HTTP/1 as backend protocol, backend HTTP/1
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connection is not encrypted by default. To enable encryption, use
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:option:`--backend-http1-tls` option.
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The backend connections are not encrypted by default. To enable
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SSL/TLS encryption, :option:`--backend-tls` option.
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Enable SSL/TLS on memcached connection
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--------------------------------------
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@ -380,3 +280,38 @@ servers ``serv1:3000`` and ``serv2:3000`` for request host
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backend=serv1,3000;example.com/myservice
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backend=serv2,3000;example.com/myservice
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You can also specify backend application protocol in
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:option:`--backend` option using ``proto`` keyword after pattern.
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Utilizing this allows ngttpx to route certain request to HTTP/2, other
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requests to HTTP/1. For example, to route requests to ``/ws/`` in
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backend HTTP/1.1 connection, and use backend HTTP/2 for other
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requests, do this:
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.. code-block:: text
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backend=serv1,3000;/;proto=h2
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backend=serv1,3000;/ws/;proto=http/1.1
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Note that the backends share the same pattern must have the same
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backend protocol. The default backend protocol is HTTP/1.1.
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Deprecated modes
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----------------
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As of nghttpx 1.9.0, ``--http2-bridge``, ``--client`` and
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``--client-proxy`` options were removed. These functionality can be
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used using combinations of options.
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* ``--http2-bridge``: Use
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:option:`--backend`\='-b<ADDR>,<PORT>;;proto=h2', and
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:option:`--backend-tls`.
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* ``--client``: Use :option:`--frontend-no-tls`,
|
||||
:option:`--backend`\='-b<ADDR>,<PORT>;;proto=h2', and
|
||||
:option:`--backend-tls`.
|
||||
|
||||
* ``--client-proxy``: Use :option:`--http2-proxy`,
|
||||
:option:`--frontend-no-tls`,
|
||||
:option:`--backend`\='-b<ADDR>,<PORT>;;proto=h2', and
|
||||
:option:`--backend-tls`.
|
||||
|
|
|
|||
|
|
@ -1672,10 +1672,10 @@ HTTP/2 and SPDY:
|
|||
Disable HTTP/2 server push. Server push is supported by
|
||||
default mode and HTTP/2 frontend via Link header field.
|
||||
It is also supported if both frontend and backend are
|
||||
HTTP/2. In this case, server push from backend session
|
||||
is relayed to frontend, and server push via Link header
|
||||
field is also supported. SPDY frontend does not support
|
||||
server push.
|
||||
HTTP/2 in default mode. In this case, server push from
|
||||
backend session is relayed to frontend, and server push
|
||||
via Link header field is also supported. SPDY frontend
|
||||
does not support server push.
|
||||
|
||||
Mode:
|
||||
(default mode)
|
||||
|
|
|
|||
Loading…
Reference in New Issue