{"id":28374,"date":"2023-09-28T17:22:02","date_gmt":"2023-09-28T15:22:02","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/?p=28374"},"modified":"2024-09-11T10:16:09","modified_gmt":"2024-09-11T08:16:09","slug":"modifying-a-zabbix-template-for-wildfly-jvm-monitoring","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/modifying-a-zabbix-template-for-wildfly-jvm-monitoring\/","title":{"rendered":"Modifying a Zabbix Template for WildFly JVM Monitoring"},"content":{"rendered":"\n<p>Zabbix provides templates easy to setup which do not require any external scripts. As an example, you can check one of my previous <a href=\"https:\/\/www.dbi-services.com\/blog\/wildfly-monitoring-in-zabbix\/\" target=\"_blank\" rel=\"noreferrer noopener\">blog post<\/a> on the subject where I monitored a WildFly server. These one includes many items and several discovery rules, but one part is not covered by it: Java Virtual Machine.<\/p>\n\n\n\n<p>One can argue that you can use the <a href=\"https:\/\/www.zabbix.com\/integrations\/jmx\" target=\"_blank\" rel=\"noreferrer noopener\">Generic Java JMX <\/a>template, but unfortunately, it cannot be used as is for two reasons:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Item conflict between the two templates: <code>jmx[\"java.lang:type=Runtime\",\"Uptime\"]<\/code><\/li>\n\n\n\n<li>The requirement to enable an extra JMX interface<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-conflict\">Conflict<\/h2>\n\n\n\n<p>If you try to link the Generic Java JMX template on a host already having WildFly Server by JMX, the following error will be raised:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Cannot inherit item with key \"jmx&#091;\"java.lang:type=Runtime\",\"Uptime\"]\" of template \"Generic Java JMX\" to host \"srv-linux-1\", because an item with the same key is already inherited from template \"WildFly Server by JMX\".<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-clone\">Clone<\/h2>\n\n\n\n<p>Before doing any modification of the template, it is better to clone it and work on the clone.<\/p>\n\n\n\n<p>First, open the template by going into Data collection, Templates and going into Generic Java JMX. From there, you will see the <strong>Full clone<\/strong> button. You can customize the name, tags, macros and value mapping. For me, I will name it Generic Java WildFly and click <strong>Add<\/strong> button.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-resolving-the-conflict\">Resolving the Conflict<\/h2>\n\n\n\n<p>To avoid the conflict, we should remove the key from one of the two template. In the cloned template, look for an item named &#8220;Runtime: JVM uptime&#8221; and remove it. Now, you should be able to link the cloned template to the host without error.<\/p>\n\n\n\n<p>Good, but we are not done yet, I want to use the existing RMI protocol and not open a new RMI port.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-jmx-endpoint\">JMX Endpoint<\/h2>\n\n\n\n<p>Each items and item prototypes has a JMS endpoint URL like that:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>service:jmx:rmi:\/\/\/jndi\/rmi:\/\/{HOST.CONN}:{HOST.PORT}\/jmxrmi<\/code><\/pre>\n\n\n\n<p>As you can see protocol (rmi:\/\/\/jndi\/rmi) is hard-coded, in other words &#8220;not using a macro&#8221;, as WildFly template does with macro <code>{$WILDFLY.JMX.PROTOCOL}<\/code>.<\/p>\n\n\n\n<p>Let&#8217;s update that!<\/p>\n\n\n\n<p>In the list of items, select all items and click <strong>Mass update<\/strong> button. Tick the JMX endpoint box and paste the following text:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>service:jmx:{$WILDFLY.JMX.PROTOCOL}:\/\/{HOST.CONN}:{HOST.PORT}<\/code><\/pre>\n\n\n\n<p>We will update two other fields in the same occasion. Actually, Generic Java JMX template defines <code>{$JMX.USER}<\/code> and <code>{$JMX.PASSWORD}<\/code>. We don&#8217;t need them or, to be more precise, we can use the same macros as in WildFly template (ie. <code>{$WILDFLY.USER}<\/code> and <code>{$WILDFLY.PASSWORD}<\/code>).<\/p>\n\n\n\n<p>Mass update windows look like that, now:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"580\" src=\"http:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2023\/09\/2023-09-28-17_05_15-zabbix_-Configuration-of-items-\u2014-Mozilla-Firefox.png\" alt=\"\" class=\"wp-image-28388\" srcset=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2023\/09\/2023-09-28-17_05_15-zabbix_-Configuration-of-items-\u2014-Mozilla-Firefox.png 700w, https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2023\/09\/2023-09-28-17_05_15-zabbix_-Configuration-of-items-\u2014-Mozilla-Firefox-300x249.png 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/figure>\n\n\n\n<p>Finally, click <strong>Update <\/strong>button. Are we done? No, we have to do the same twice for the item prototype of the discover rules:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"86\" src=\"http:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2023\/09\/2023-09-28-17_07_51-zabbix_-Configuration-of-discovery-rules-\u2014-Mozilla-Firefox.png\" alt=\"\" class=\"wp-image-28389\" srcset=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2023\/09\/2023-09-28-17_07_51-zabbix_-Configuration-of-discovery-rules-\u2014-Mozilla-Firefox.png 720w, https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2023\/09\/2023-09-28-17_07_51-zabbix_-Configuration-of-discovery-rules-\u2014-Mozilla-Firefox-300x36.png 300w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/figure>\n\n\n\n<p>Another more brutal approach to this is to export file in YAML, replace strings in it and re-import it in Zabbix.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-next\">What Next?<\/h2>\n\n\n\n<p>While looking at the gathered data, I was not able to find any discovered items. To figure out what is happening, I ran a test on the Garbage collector discovery rule and received that data:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: jscript; title: ; notranslate\" title=\"\">\n{\n    &quot;data&quot;: &#x5B;{\n            &quot;{#JMXDOMAIN}&quot;: &quot;java.lang&quot;,\n            &quot;{#JMXTYPE}&quot;: &quot;GarbageCollector&quot;,\n            &quot;{#JMXOBJ}&quot;: &quot;java.lang:name=G1 Young Generation,type=GarbageCollector&quot;,\n            &quot;{#JMXNAME}&quot;: &quot;G1 Young Generation&quot;\n        }, {\n            &quot;{#JMXDOMAIN}&quot;: &quot;java.lang&quot;,\n            &quot;{#JMXTYPE}&quot;: &quot;GarbageCollector&quot;,\n            &quot;{#JMXOBJ}&quot;: &quot;java.lang:name=G1 Old Generation,type=GarbageCollector&quot;,\n            &quot;{#JMXNAME}&quot;: &quot;G1 Old Generation&quot;\n        }\n    ]\n}\n<\/pre><\/div>\n\n\n<p>It looks fine, but why Zabbix does not create the associated items? It does not expect to have the data encapsulated in a data array (line 2). The idea here is to add a preprocessing rule to remove that envelop:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"125\" src=\"http:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2023\/09\/2023-09-28-17_14_38-zabbix_-Configuration-of-discovery-rules-\u2014-Mozilla-Firefox.png\" alt=\"\" class=\"wp-image-28391\" srcset=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2023\/09\/2023-09-28-17_14_38-zabbix_-Configuration-of-discovery-rules-\u2014-Mozilla-Firefox.png 900w, https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2023\/09\/2023-09-28-17_14_38-zabbix_-Configuration-of-discovery-rules-\u2014-Mozilla-Firefox-300x42.png 300w, https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2023\/09\/2023-09-28-17_14_38-zabbix_-Configuration-of-discovery-rules-\u2014-Mozilla-Firefox-768x107.png 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/figure>\n\n\n\n<p>And now, I can see the item created:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2023\/09\/2023-09-28-17_15_44-zabbix_-Latest-data-\u2014-Mozilla-Firefox-1024x122.png\" alt=\"\" class=\"wp-image-28392\" style=\"width:840px;height:100px\" width=\"840\" height=\"100\" srcset=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2023\/09\/2023-09-28-17_15_44-zabbix_-Latest-data-\u2014-Mozilla-Firefox-1024x122.png 1024w, https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2023\/09\/2023-09-28-17_15_44-zabbix_-Latest-data-\u2014-Mozilla-Firefox-300x36.png 300w, https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2023\/09\/2023-09-28-17_15_44-zabbix_-Latest-data-\u2014-Mozilla-Firefox-768x92.png 768w, https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2023\/09\/2023-09-28-17_15_44-zabbix_-Latest-data-\u2014-Mozilla-Firefox-1536x184.png 1536w, https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2023\/09\/2023-09-28-17_15_44-zabbix_-Latest-data-\u2014-Mozilla-Firefox-2048x245.png 2048w\" sizes=\"auto, (max-width: 840px) 100vw, 840px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Zabbix provides templates easy to setup which do not require any external scripts. As an example, you can check one of my previous blog post on the subject where I monitored a WildFly server. These one includes many items and several discovery rules, but one part is not covered by it: Java Virtual Machine. One [&hellip;]<\/p>\n","protected":false},"author":40,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[197],"tags":[355,1217,1100,2430],"type_dbi":[],"class_list":["post-28374","post","type-post","status-publish","format-standard","hentry","category-application-integration-middleware","tag-java-virtual-machine","tag-jvm","tag-wildfly","tag-zabbix"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Modifying a Zabbix Template for WildFly JVM Monitoring - dbi Blog<\/title>\n<meta name=\"description\" content=\"How and why modifying a Zabbix template?\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dbi-services.com\/blog\/modifying-a-zabbix-template-for-wildfly-jvm-monitoring\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Modifying a Zabbix Template for WildFly JVM Monitoring\" \/>\n<meta property=\"og:description\" content=\"How and why modifying a Zabbix template?\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.dbi-services.com\/blog\/modifying-a-zabbix-template-for-wildfly-jvm-monitoring\/\" \/>\n<meta property=\"og:site_name\" content=\"dbi Blog\" \/>\n<meta property=\"article:published_time\" content=\"2023-09-28T15:22:02+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-09-11T08:16:09+00:00\" \/>\n<meta name=\"author\" content=\"Middleware Team\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Middleware Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/modifying-a-zabbix-template-for-wildfly-jvm-monitoring\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/modifying-a-zabbix-template-for-wildfly-jvm-monitoring\/\"},\"author\":{\"name\":\"Middleware Team\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/#\/schema\/person\/8d8563acfc6e604cce6507f45bac0ea1\"},\"headline\":\"Modifying a Zabbix Template for WildFly JVM Monitoring\",\"datePublished\":\"2023-09-28T15:22:02+00:00\",\"dateModified\":\"2024-09-11T08:16:09+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/modifying-a-zabbix-template-for-wildfly-jvm-monitoring\/\"},\"wordCount\":500,\"commentCount\":1,\"keywords\":[\"Java Virtual Machine\",\"jvm\",\"WildFly\",\"Zabbix\"],\"articleSection\":[\"Application integration &amp; 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