Expand mod_cluster manager console to output JSON data about worker nodes ------------------------------------------------------------------------- Key: MODCLUSTER-565 URL: https://issues.jboss.org/browse/MODCLUSTER-565 Project: mod_cluster Issue Type: Feature Request Components: Native (httpd modules) Affects Versions: 2.0.0.Alpha1 Reporter: Michal Karm Assignee: Jean-Frederic Clere Priority: Major mod_proxy_cluster needs a module that would provide a comprehensive command & control visualization of events going on within the balancer and with worker nodes. The visualization would also serve as a demonstration for presentation purposes (to replace current SWING app from ~2009-ish). The new module would most likely work with https://d3js.org/ and generate an SVG/JS page on a new added httpd handler. For this new module to work, we need JSON data from mod_cluster manager (currently spits out only HTML/text/XML). h3. Task one: mod_cluster manager JSON data [~bsikora] researched suitable JavaScript libraries and he would like to have the JSON output resemble the following: {quote} I find the Wildfly style of Undertow mod_cluster proxy filter CLI output the most suitable: {code} "balancer" => {"mycluster" => { "max-attempts" => 1, "sticky-session" => true, "sticky-session-cookie" => "JSESSIONID", "sticky-session-force" => false, "sticky-session-path" => undefined, "sticky-session-remove" => false, "wait-worker" => 0, "load-balancing-group" => undefined, "node" => { "jboss-eap-7.1-1" => { "aliases" => [ "default-host", "localhost" ], "cache-connections" => 40, "elected" => 0, "flush-packets" => false, "load" => 0, "load-balancing-group" => undefined, "max-connections" => 40, "open-connections" => 0, "ping" => 10, "queue-new-requests" => true, "read" => 0L, "request-queue-size" => 1000, "status" => "NODE_HOT_STANDBY", "timeout" => 0, "ttl" => 60L, "uri" => "ajp://192.168.122.88:8009/?#", "written" => 0L, "context" => {"/clusterbench" => { "requests" => 0, "status" => "enabled" }} }, {code} So, the JSON for my JavaScript renderer could look like: {code} { "balancers": [{ "name": "mycluster", "max-attempts": 1, "sticky-session": true, "sticky-session-cookie": "JSESSIONID", "sticky-session-force": false, "sticky-session-remove": false, "wait-worker": 0, "workers": [ { "name": "jboss-eap-7.1-1", "aliases": ["default-host", "localhost"], "cache-connections": 40, "elected": 0, "flush-packets": false, "load": 0, "requests": 350 }, { "name": "jboss-eap-7.1-2", "aliases": ["default-host", "localhost"], "cache-connections": 40, "elected": 0, "flush-packets": false, "load": 0, "requests": 350 } ] }] } {code} {quote} h3. Task two: mod_cluster gui console Write a separate module that could be optionally loaded alongside with mod_manager to provide the gui JavaScript/SVG gui console and/or consider deploying the console as a web page into the httpd's web serving directory.