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Server

This directory contains all server code for the Strimzi UI - ie code which is responsible for the serving of and back channel logic to support the client code. A summary of contents can be found below:

  • api - module which proxies backend requests to the configured strimzi-admin server
  • client - handlers for returning built client code to a user's web browser.
  • config - module which serves UI configuration to the client.
  • core - the core express server logic. This document also covers how the core module interacts with the other modules.
  • log - module that handles client logging events.
  • mockapi - handlers for emulating a real instance of Strimzi-admin in dev and test scenarios. Also allows the configuration of the server to be changed to enable test scenarios.
  • test - common test code and helpers for the UI server.
  • logging.ts - logging handling module. Uses the logging configuration from the server's configuration to create the pino and pino-http loggers, and extends the Logger object with entry and exit tracing methods.
  • main.ts - the build entry point for the production UI server. It bootstraps the server, and owns the creation and management of a node http/https server (and binding express to it).
  • serverConfig.ts - configuration handling module. If an configPath envar is provided, the file specified is used for the server's configuration, else, server.config.json in the current working directory will be used. If neither exist, a default config defined in this module will be used.
  • types.ts - custom types and interfaces used in the server code base.
  • tsconfig.json - Typescript config for this codebase.
  • jest.config.js - Jest config for this codebase.

Configuration options

As described in the configuration approach, the UI server's configuration is provided via a file, which is then watched at runtime for modification. This configuration file is expected to be called server.config.json (available in the same directory as the node executable is run from), but this can be configured at runtime via environment variable configPath, dictating a different path and file name. The file must be either valid JSON or JS. The server also hosts configuration for discovery by the client via the config module. The configuration options for the server provided in the previously mentioned configuration file are as follows:

Configuration Required Default Purpose
authentication.strategy No none What authentication strategy to use to authenticate users. See the security section for details of the available options.
authentication.configuration No {} Any additional configuration required for the provided authentication strategy authentication.strategy . See the security section for details of the available options.
client.configOverrides No {} Overrides to send to the client. See client configuration for further details. These values will take precedence over any others provided.
client.publicDir No /dist/client The location of the built client to serve.
client.transport.cert No N/A - if one of client.transport.cert or client.transport.key are not provided, server will be HTTP PEM certificate presented to browsers on connecting to the UI server.
client.transport.key No N/A - if one of client.transport.cert or client.transport.key are not provided, server will be HTTP PEM certificate private key for the certificate provided in client.transport.cert.
client.transport.ciphers No default set from node's tls module TLS ciphers used/supported by the HTTPS server for client negotiation. Only applies if starting an HTTPS server.
client.transport.minTLS No TLSv1.2 Minimum TLS version supported by the server. Only applies if starting an HTTPS server. Set to TLSv1.2 for browser compatibility.
featureFlags No {} Feature flag overrides to set. The configuration is as per the format specified here. These values will take precedence over any others provided.
hostname No '0.0.0.0' The hostname the UI server will be bound to.
logging No TBD Logging configuration settings. Format to be defined in #24
modules No Object - enabled modules and configuration can be found here The modules which are either enabled or disabled.
port No 3000 The port the UI server will be bound to.
proxy.transport.cert No If not provided, SSL certificate validation of the upstream admin server is disabled CA certificate in PEM format of the backend admin server api requests are to be sent to.
proxy.hostname Yes N/A The hostname of the admin server to send api requests to.
proxy.port Yes N/A The port of the admin server to send api requests to.
session.name no strimzi-ui The name used to identify the session cookie