Modify host-ip for k8s not to rely on component name

Author: simonkotwicz

README.md

@@ -41,10 +41,9 @@ The appender supports custom layouts, the default layout function used is:
 
 ```
 let layout = (logEvent) => {
-    let component = process.env.log4js_logmet_component || config.component;
-    let instanceId = process.env.CF_INSTANCE_INDEX || require('os').hostname().replace(new RegExp(`(-|\\.)?${ component }(-|\\.)?`, 'gi'), '');
+    let instanceId = process.env.CF_INSTANCE_INDEX || require('os').hostname().replace(/^.*-([a-zA-Z0-9]+-[a-zA-Z0-9]+)$/g,'$1');
     let logmetEvent = {
-        'component': component,
+        'component': process.env.log4js_logmet_component || config.component,
         'host-ip': process.env.CF_INSTANCE_IP,
         'instance-id': instanceId,
         'loglevel': logEvent.level.levelStr,

index.js

@@ -46,10 +46,9 @@ function configure(config, layouts) {
     }
 
     let layout = (logEvent) => {
-        let component = process.env.log4js_logmet_component || config.component;
-        let instanceId = process.env.CF_INSTANCE_INDEX || require('os').hostname().replace(new RegExp(`(-|\\.)?${ component }(-|\\.)?`, 'gi'), '');
+        let instanceId = process.env.CF_INSTANCE_INDEX || require('os').hostname().replace(/^.*-([a-zA-Z0-9]+-[a-zA-Z0-9]+)$/g,'$1');
         let logmetEvent = {
-            'component': component,
+            'component': process.env.log4js_logmet_component || config.component,
             'host-ip': process.env.CF_INSTANCE_IP,
             'instance-id': instanceId,
             'loglevel': logEvent.level.levelStr,

package.json

@@ -1,6 +1,6 @@
 {
     "name": "log4js-logmet-appender",
-    "version": "1.1.0",
+    "version": "1.1.1",
     "description": "Logmet appender for node-log4js",
     "author": "Herman Singh Badwal <hermanba@ca.ibm.com>",
     "license": "MIT",