A new ReloadConfig function has been added to the Server in server.go which reloads server configurations and updates the Server's conf field as well as the configured Ruleset. Changes have also been made to the handling of the SIGHUP signal in main.go, using this new function to reload configurations and updating the logs accordingly.
Changed the processing of log messages to run in a separate go routine, improving the performance of the server. This update ensures efficient log processing by allowing multiple log messages to be processed concurrently. The function has also been refactored to not return an error as any issues should be contained within the routine call itself.
Added a new function to process log messages and match them against the ruleset. This function will also handle action execution when a match is found. Additionally, added error handling and a layer of fault tolerance within the action configuration process. As a result, if an error arises while configuring an action, the error is logged and skipped, allowing for the rest of the actions to execute.
Updated the action configuration process in server.go to skip an action if its configuration results in an error. This ensures that the remaining actions can still execute, even if one fails during the configuration stage. File action plugin specifically has been updated to support this skip on error logic.
Refactored the Action interface in the plugins package to separate the configuration step from the process method. The new Config method accepts a configuration map and returns an error. The modified server.go uses this Config method to apply configurations before calling Process. File action plugin specifically has been updated to support this new interface where configurations are now updated via Config method before invoking Process.
Introduced an Actions interface for plugins in 'action.go' and implemented a corresponding registry in 'registry.go'. Additionally, adjusted rule related behavior in 'Server' to account for actions, with relevant new fields in Ruleset and Rule. This enables multiple actions on a log message based on defined rules and further modularises the codebase, paving the path for addition of more plugin actions.
The Ruleset struct has been updated to include a 'HostMatch' field. A corresponding conditional block to handle 'HostMatch' was added in the 'Server' object's ruleset cycle. This allows the rules to include host-specific matches and debug information about matches found. Further expansion of this functionality can enable detailed rule application based on the target host.
An unnecessary line break in the server.go file was removed, which was situated between connection error handling and the read loop. Such spacing did not contribute to readability or function, hence impacting the overall code cleanliness.
Added a Ruleset configuration to the logranger application, along with associated error handling. The code now loads a ruleset file from configuration, checks for duplicate rules, and logs each rule as it is found. The ruleset is also integrated within the server setup. The PIDFile now includes a default RuleFile reference in config.go.
The processing deadline handling was moved from the connection-level anonymous go-routine to the HandleConnection method. This refactor allows the reading from the connection to be looped, improving the handling of timeouts and parsing failure cases.
This update upgrades the go-parsesyslog dependency version to v0.2.2. It also enhances the server's connection handling. This is done by expanding the `HandleConnection` method to handle network errors and EOF scenarios more thoroughly, adjusting processing time measurements, and handling deadlines for connection processing. Furthermore, the initialization of the syslog parser has now been moved to the `NewServer` function for efficiency.
Introduced a new Connection struct and related functions in `connection.go` to facilitate network connections. Incorporated the `go-parsesyslog` package to parse incoming network data. Implemented functions in `server.go` to accept and handle incoming network connections, bolstering the application's network interaction functionality.
The documentation for some methods in the server-related files (config.go, server.go, and listener.go) has been updated to provide more accurate and descriptive explanations of their functionality. Additionally, the New methods for Config and Server objects have been changed to reflect that they create instances of these objects. Some method functionalities like 'setLogLevel' in server.go have been extended for more accurate operation based on the config log level.
All source code files as well as README.md, .gitignore, and various configuration files have been updated with an SPDX license identifier, changing license from CC0-1.0 to MIT. The copyright year has been updated to 2023, and the copyright holder's email address has been corrected from 'winni@neessen.dev' to 'wn@neessen.dev'. An MIT license text file has been additionally added.
This commit introduces the creation of the core server and its components: config loading mechanism, listener setup, and error handling. The provided configuration allows the server to run different types of listeners. Additionally, it includes robust log-level settings to facilitate debugging and operational transparency.
