| commit | fca2cbeafc22a46875314309c147a55a9d1cee87 | [log] [tgz] |
|---|---|---|
| author | Ed Tanous <edtanous@google.com> | Thu Jan 28 14:49:59 2021 -0800 |
| committer | Ed Tanous <ed@tanous.net> | Wed Jun 28 17:46:05 2023 +0000 |
| tree | 1196b496a2830e6bc7de5fb3125081eb7df6c752 | |
| parent | ddceee0705182270d0643774d494df4a7f1d028f [diff] |
HTTP/2 support HTTP/2 gives a number of optimizations, while keeping support for the protocol. HTTP/2 support was recently added to the Redfish specification. The largest performance increase in bmc usage is likely header compression. Almost all requests reuse the same header values, so the hpack based compression scheme in HTTP/2 allows OpenBMC to be more efficient as a transport, and has the potential to significantly reduce the number of bytes we're sending on the wire. This commit adds HTTP2 support to bmcweb through nghttp2 library. When static linked into bmcweb, this support adds 53.4KB to the bmcweb binary size. nghttp2 is available in meta-oe already. Given the experimental nature of this option, it is added under the meson option "experimental-http2" and disabled by default. The hope is to enable it at some point in the future. To accomplish the above, there a new class, HTTP2Connection is created. This is intended to isolate HTTP/2 connections code from HttpConnection such that it is far less likely to cause bugs, although it does duplicate about 20 lines of code (async_read_some, async_write_some, buffers, etc). This seems worth it for the moment. In a similar way to Websockets, when an HTTP/2 connection is detected through ALPN, the HTTP2Connection class will be instantiated, and the socket object passed to it, thus allowing the Connection class to be destroyed, and the HTTP2Connection to take over for the user. Tested: Redfish service validator passes with option enabled With option disabled GET /redfish/v1 in curl shows ALPN non negotiation, and fallback to http1.1 With the option enable GET /redfish/v1 in curl shows ALPN negotiates to HTTP2 Change-Id: I7839e457e0ba918b0695e04babddd0925ed3383c Signed-off-by: Ed Tanous <edtanous@google.com>
This component attempts to be a "do everything" embedded webserver for OpenBMC.
The webserver implements a few distinct interfaces:
bmcweb at a protocol level supports http and https. TLS is supported through OpenSSL.
Bmcweb supports multiple authentication protocols:
Each of these types of authentication is able to be enabled or disabled both via runtime policy changes (through the relevant Redfish APIs) or via configure time options. All authentication mechanisms supporting username/password are routed to libpam, to allow for customization in authentication implementations.
All authorization in bmcweb is determined at routing time, and per route, and conform to the Redfish PrivilegeRegistry.
*Note: Non-Redfish functions are mapped to the closest equivalent Redfish privilege level.
bmcweb is configured per the meson build files. Available options are documented in meson_options.txt
meson setup builddir ninja -C builddir
If any of the dependencies are not found on the host system during configuration, meson will automatically download them via its wrap dependencies mentioned in bmcweb/subprojects.
bmcweb relies on some on-system data for storage of persistent data that is internal to the process. Details on the exact data stored and when it is read/written can seen from the persistent_data namespace.
When SSL support is enabled and a usable certificate is not found, bmcweb will generate a self-signed a certificate before launching the server. Please see the bmcweb source code for details on the parameters this certificate is built with.
bmcweb is capable of aggregating resources from satellite BMCs. Refer to AGGREGATION.md for more information on how to enable and use this feature.