KrakenD EE v2.9 released: Redis Cluster Support, LRU, WebSockets Upgrades & More!

We’re excited to announce the release of KrakenD Enterprise Edition (EE) 2.9, packed with powerful new features and enhancements across a lot of components. This release brings greater flexibility, caching improvements, Redis Cluster support, enhanced WebSockets, and more. See below the most relevant changes.

More data on the sequential proxy

The sequential proxy was limited to passing previous calls’ data to the next call’s URL. Now you can propagate parameters or the entire body response of previous calls, allowing more flexibility when passing data from one backend to the other. The limitation of passing data only on the url_pattern is now history. See an example of passing a previous body to the next call.

The sequential has also been reworked to improve its performance.

Automatically generate boilerplate for Go plugins

Developers writing custom plugins will be delighted with the new krakend plugin init command that generates the necessary source code to work with custom plugins, accelerating development and customization. It produces the .go and Makefile of the steps needed to stop worrying about plugin compilation. The generated source code implements every possible interface and includes examples and comments to accelerate your adoption.

See the new Plugin generator

Redis cluster support for rate limiting

The Redis configuration extends its connection options to onboard Redis Clusters, making it easier to distribute rate limits across multiple Redis nodes. You can add clusters in addition to the existing connection_pools declaration.

See the Redis cluster configuration

Enhanced LRU Caching Mechanism

A new LRU Cache is now available, providing better memory management and control. When you add the two attributes below, you control the amount of content you allow the system to cache, and it also enables the LRU algorithm (Least Recently Used) to rotate items once the capacity is full.

• max_size: Defines the maximum cache size.
• max_items: Limits the number of stored items.

Offline linter support

The KrakenD linter can now work without an internet connection using the --lint-no-network flag. The new flag accelerates the execution in CI/CD pipelines and allows customers in air-gapped environments to lint the configurations offline.

Replace krakend check --lint by --lint-no-network.

From plugin to native component

We are continuing to migrate the few pending Enterprise plugins to convert them to native components. In this release:

• content-replacer: Now implemented as modifier/response-body, offering expanded features.
• minimum-response: Replaced by validation/response-json-schema for response validation.

WebSockets enhancements

The WebSockets and gRPC components have received enhancements, like enabling header propagation in direct connections, supporting binary communication transparently, or adding custom subprotocols to integrate technologies like Streamlit.

The release contains more changes, which you can see below. Ready to upgrade?