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gerrit.openbmc.org / openbmc / bmcweb / cf9085acd78ed83bfbc075d3fa70babed49a8a9b
commitcf9085acd78ed83bfbc075d3fa70babed49a8a9b[log] [tgz]
authorrohitpai <ropai@nvidia.com>Mon Feb 24 12:33:59 2025 +0530
committerEd Tanous <ed@tanous.net>Mon Mar 17 18:54:15 2025 +0000
tree5862be267fcc33f8c4272881bfbd163d10145809
parent4d7b5ddb3a2b6cc42b7bbc0c710f297e6df4fd55 [diff]
Add support for systemd service watchdog

Systemd has support for enabling service level watchdog. The MR enables
this support for bmcweb daemon. Request for watchdog monitor from
systemd is added in bmcweb.service.in. From the event loop a timer is
registered to kick the watchdog periodically

The default watchdog timeout is set at 120 seconds and the timer is set
to kick it at a quarter of the interval (every 30 seconds).
This timeout is set somewhat arbitrarily based on the longest blocking
call that could occur and still give a valid HTTP response.  Suspect
lower values could work equally as well.

Benefits of Service Watchdog
- Bmcweb route handlers should not make any blocking IO calls which
block the event loop for considerable amount of time and slowdown the
response of other URI requests in the queue. Watchdog can help to detect
such issues.
- Watchdog can help restart the service if any route handler code has
uncaught bugs resulting from system API errors (this is in theory,
currently we don't have any use case).

Tested
1. UT is passing
2. Service validator is passing
3. Fw upgrade POST requests are working

Change-Id: If62397d8836c942fdcbc0618810fe82a8b248df8
Signed-off-by: rohitpai <ropai@nvidia.com>
Signed-off-by: Ed Tanous <etanous@nvidia.com>
5 files changed
tree: 5862be267fcc33f8c4272881bfbd163d10145809
  1. .github/
  2. config/
  3. http/
  4. include/
  5. redfish-core/
  6. scripts/
  7. src/
  8. static/
  9. subprojects/
  10. test/
  11. .clang-format
  12. .clang-tidy
  13. .codespell-ignore
  14. .dockerignore
  15. .eslintignore
  16. .gitignore
  17. .markdownlint.yaml
  18. .openbmc-enforce-gitlint
  19. .prettierignore
  20. .shellcheck
  21. AGGREGATION.md
  22. CLIENTS.md
  23. COMMON_ERRORS.md
  24. DBUS_USAGE.md
  25. DEVELOPING.md
  26. HEADERS.md
  27. LICENSE
  28. meson.build
  29. meson.options
  30. OEM_SCHEMAS.md
  31. OWNERS
  32. README.md
  33. Redfish.md
  34. REDFISH_CHECKLIST.md
  35. run-ci
  36. TESTING.md
README.md

OpenBMC webserver

This component attempts to be a "do everything" embedded webserver for OpenBMC.

Features

The webserver implements a few distinct interfaces:

  • DBus event websocket. Allows registering on changes to specific dbus paths, properties, and will send an event from the websocket if those filters match.
  • OpenBMC DBus REST api. Allows direct, low interference, high fidelity access to dbus and the objects it represents.
  • Serial: A serial websocket for interacting with the host serial console through websockets.
  • Redfish: A protocol compliant, DBus to Redfish translator.
  • KVM: A websocket based implementation of the RFB (VNC) frame buffer protocol intended to mate to webui-vue to provide a complete KVM implementation.

Protocols

bmcweb at a protocol level supports http and https. TLS is supported through OpenSSL.

AuthX

Authentication

Bmcweb supports multiple authentication protocols:

  • Basic authentication per RFC7617
  • Cookie based authentication for authenticating against webui-vue
  • Mutual TLS authentication based on OpenSSL
  • Session authentication through webui-vue
  • XToken based authentication conformant to Redfish DSP0266

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.

Authorization

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.

Configuration

bmcweb is configured per the meson build files. Available options are documented in meson_options.txt

Compile bmcweb with default options

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.

Use of persistent data

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.

TLS certificate generation

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.

Redfish Aggregation

bmcweb is capable of aggregating resources from satellite BMCs. Refer to AGGREGATION.md for more information on how to enable and use this feature.