We are pleased to present Apache 3.4.0 with exciting new features and performance improvements.

This release provides a new plugin loki-logger to forward logs to Grafana Loki, and allows for mTLS connection on the route level. In addition, the release also includes many other updates to continuously enhance the user experience of .

New Features​

Support integration with Grafana Loki using the loki-logger plugin​

The loki-logger plugin is used to forward logs to Grafana Loki for analysis and storage.

When the plugin is enabled, serializes the request context information to log entries in JSON and submits it to the batch queue. When the maximum batch size is reached, the data in the queue is pushed to Loki.

For example, you can enable the loki-logger plugin on a specific route:

curl http://127.0.0.1:9180//admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '{    "plugins": {        "loki-logger": {            "endpoint_addrs" : ["http://127.0.0.1:3100"]        }    },    "upstream": {       "nodes": {           "127.0.0.1:1980": 1       },       "type": "roundrobin"    },    "uri": "/hello"}'

If successful, logs should be forwarded to Loki running at http://127.0.0.1:3100.

For more information about the plugin, see loki-logger plugin doc.

PR for this feature could be found here #9399.

Support route-level mTLS​

Support configuring mTLS on the route level. The Admin API SSL object now has a new configuration option, client.skip_mtls_uri_regex. Users can specify a list of URIs (RegEx supported) in this option, for which the verification of the client certificate should be skipped.

For example, you can configure a route-level mTLS such as the following:

curl http://127.0.0.1:9180//admin/routes/1 \-H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '{    "uri": "/*",    "upstream": {        "nodes": {            "httpbin.org": 1        }    }}'

curl http://127.0.0.1:9180//admin/ssls/1 \-H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '{    "cert": "'"$(path/to/certs/mtls_server.crt)"'",    "key": "'"$(path/to/certs/mtls_server.key)"'",    "snis": [        "*..dev"    ],    "client": {        "ca": "'"$(path/to/certs/mtls_ca.crt)"'",        "depth": 10,        "skip_mtls_uri_regex": [            "/anything.*"        ]    }}'

If the URI of a request is in the skip_mtls_uri_regex list, then the client certificate will not be checked. Note that other URIs of the associated SNI will get HTTP 400 response instead of an alert error in the SSL handshake phase, if the client certificate is missing or invalid.

For a detailed example, see Tutorial: mTLS bypass based on regular expression matching against URI.

PR for this feature could be found here #9322.

Other Updates​

• Support the use of one HTTP connection to watch the prefix for all etcd resources. This reduces the resource consumption and improved watch performance to be on par with gRPC connections (PR #9456)
• Support multiple RegEx patterns in the proxy_rewrite plugin (PR #9194)
• Allow users to configure DEFAULT_BUCKETS in the prometheus plugin (PR #9673)

Changelog​

For a complete list of new features and bug fixes included in this release, please see CHANGELOG.