{"id":26281,"date":"2023-06-27T12:07:13","date_gmt":"2023-06-27T10:07:13","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/?p=26281"},"modified":"2024-09-11T10:18:32","modified_gmt":"2024-09-11T08:18:32","slug":"zabbix-from-problem-to-remediation","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/","title":{"rendered":"Zabbix from Problem to Remediation"},"content":{"rendered":"\n

Until now, in my previous blog posts, we did not cover one of the main features of any monitoring platform: Alarming<\/strong>. In Zabbix, it is named triggers<\/strong>.<\/p>\n\n\n\n

Item and Trigger<\/h2>\n\n\n\n

Trigger is based on an item calculation. Thus, the first thing to do is to create an item.<\/p>\n\n\n\n

So, let’s create a simple check HTTPS port like the following:<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

As you can see, this is of type Simple Check<\/em>, and it tests if a service is running and accepting TCP connections. Note that this item was created in a template for easier setup.<\/p>\n\n\n\n

We can check the historical data of this status:<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Trigger Setup<\/h2>\n\n\n\n

Next step is to define a trigger on this item. In the same Web Service<\/em> template, I go into Triggers<\/em> tab and click Create trigger<\/em> button. <\/p>\n\n\n\n

I name the trigger and select severity. The interesting part is the expression:<\/p>\n\n\n

\nlast(\/Web Service\/net.tcp.service[https,,8443],#1)=0\n<\/pre><\/div>\n\n\n
Let’s try to understand that formula by decomposing it:<\/p>\n\n\n\n
    \n
  • last<\/code>: Takes the last available value of the item<\/li>\n\n\n\n
  • \/Web Service\/net.tcp.service[https,,8443]<\/code>: The template name followed by the check<\/li>\n\n\n\n
  • #1<\/code>: Is the latest value available. You can go further by looking at N# most recent value<\/li>\n\n\n\n
  • =0<\/code>: To indicate that trigger is raised when result of last evaluation is 0, meaning port is not reachable<\/li>\n<\/ul>\n\n\n\n
    This is a first try in an attempt of auto-recovery as this test does not really check that application is responding. Only TCP connectivity is tested (TCP might be OK, when web application is not).<\/p>\n\n\n\n
    Action and Script<\/h2>\n\n\n\n
    What follows is the creation of a script that will run when the trigger change to problem state. Go in Alerts and scripts. Scripts command are as follow:<\/p>\n\n\n
    \nsudo -u mdw_user jcmd `pgrep java` Thread.print > \/tmp\/java_stack_`pgrep java`.txt\nsudo systemctl restart mdw_user_WildFly.service\n<\/pre><\/div>\n\n\n
    Before doing the restart, I am getting a stack trace:<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    Then, we must create a trigger action. In Alerts, Actions, click trigger actions and click Create action<\/em> button. Name the action and add conditions which are filters to better target the hosts where action could be triggered. In my case, I only filter on host group but you have many filtering possibilities:<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    In the operations <\/em>tab, you set what you want the action to do. I am adding an operation that is calling the script:<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    Once completed, Operations <\/em>tab will look like that:<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    Testing<\/h2>\n\n\n\n
    It is time to test our setup. For that, I will simply stop the service. Of course, thread dump will be empty in that case.<\/p>\n\n\n\n
    As soon as service is stopped, a high<\/strong><\/mark> severity problem is raised:<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    After one minute, problem resolve itself:<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    In Actions column, I can click to get more information on what happened (most recent event on top):<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    Not only you can see the remote command but also Slack notification I previously setup and tested.<\/p>\n\n\n\n
    Improvements<\/h2>\n\n\n\n
    One possible improvement is to use Web scenario instead of simple TCP test as, in some situations, server keep port available, but application itself is not responding HTTP 200 code.<\/p>\n\n\n\n
    I will create a Web scenario with only one step as my web application is a simple Hello World application. I filled first scenario tab like that:<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    And first, and only step:<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    For step to be considered successful, it requires two conditions:<\/p>\n\n\n\n
      \n
    • Returned content must contain “Congrats” string<\/li>\n\n\n\n
    • Status code must be 200<\/li>\n<\/ul>\n\n\n\n
      As this scenario is in a template, URL must be generic, thus I used {HOST.HOST} built-in macro.<\/p>\n\n\n\n
      Another advantage of scenario is that it automatically creates few items on performance:<\/p>\n\n\n\n
      \"\"<\/figure>\n\n\n\n
      Finally, we can create a trigger as before with a different Expression:<\/p>\n\n\n
      \nlast(\/Web Service\/web.test.fail[Check HTTP Status])&lt;&gt;0\n<\/pre><\/div>\n\n\n
      When any step of the scenario is failed, meaning web.test.fail will be different from 0, then a problem will be raised and automatically resolved.<\/p>\n\n\n\n
      \"\"<\/figure>\n\n\n\n
      Et voil\u00e0 !<\/p>\n\n\n\n
      Conclusion<\/h2>\n\n\n\n
      I am not a fan of auto-recovery if nothing is really done to prevent issues from happening, but how this trigger has been defined, it will automatically gather logs and recover just after. That I like very much!<\/p>\n","protected":false},"excerpt":{"rendered":"
      Until now, in my previous blog posts, we did not cover one of the main features of any monitoring platform: Alarming. In Zabbix, it is named triggers. Item and Trigger Trigger is based on an item calculation. Thus, the first thing to do is to create an item. So, let’s create a simple check HTTPS […]<\/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":[143,2430],"type_dbi":[],"class_list":["post-26281","post","type-post","status-publish","format-standard","hentry","category-application-integration-middleware","tag-monitoring","tag-zabbix"],"acf":[],"yoast_head":"\nZabbix from Problem to Remediation - dbi Blog<\/title>\n<meta name=\"description\" content=\"What is the procedure to setup alarms and automatic remediation in Zabbix.\" \/>\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\/zabbix-from-problem-to-remediation\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Zabbix from Problem to Remediation\" \/>\n<meta property=\"og:description\" content=\"What is the procedure to setup alarms and automatic remediation in Zabbix.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/\" \/>\n<meta property=\"og:site_name\" content=\"dbi Blog\" \/>\n<meta property=\"article:published_time\" content=\"2023-06-27T10:07:13+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-09-11T08:18:32+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=\"6 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\/zabbix-from-problem-to-remediation\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/\"},\"author\":{\"name\":\"Middleware Team\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/#\/schema\/person\/8d8563acfc6e604cce6507f45bac0ea1\"},\"headline\":\"Zabbix from Problem to Remediation\",\"datePublished\":\"2023-06-27T10:07:13+00:00\",\"dateModified\":\"2024-09-11T08:18:32+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/\"},\"wordCount\":636,\"commentCount\":0,\"keywords\":[\"Monitoring\",\"Zabbix\"],\"articleSection\":[\"Application integration & Middleware\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/\",\"url\":\"https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/\",\"name\":\"Zabbix from Problem to Remediation - dbi Blog\",\"isPartOf\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/#website\"},\"datePublished\":\"2023-06-27T10:07:13+00:00\",\"dateModified\":\"2024-09-11T08:18:32+00:00\",\"author\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/#\/schema\/person\/8d8563acfc6e604cce6507f45bac0ea1\"},\"description\":\"What is the procedure to setup alarms and automatic remediation in Zabbix.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\/\/www.dbi-services.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Zabbix from Problem to Remediation\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/#website\",\"url\":\"https:\/\/www.dbi-services.com\/blog\/\",\"name\":\"dbi Blog\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.dbi-services.com\/blog\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/#\/schema\/person\/8d8563acfc6e604cce6507f45bac0ea1\",\"name\":\"Middleware Team\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/secure.gravatar.com\/avatar\/ddcae7ba0f9d1a0e7ae707f0e689e4a9c95bb48ec49c8e6d9cc86d43f4121cb6?s=96&d=mm&r=g\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/ddcae7ba0f9d1a0e7ae707f0e689e4a9c95bb48ec49c8e6d9cc86d43f4121cb6?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/ddcae7ba0f9d1a0e7ae707f0e689e4a9c95bb48ec49c8e6d9cc86d43f4121cb6?s=96&d=mm&r=g\",\"caption\":\"Middleware Team\"},\"url\":\"https:\/\/www.dbi-services.com\/blog\/author\/middleware-team\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Zabbix from Problem to Remediation - dbi Blog","description":"What is the procedure to setup alarms and automatic remediation in Zabbix.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/","og_locale":"en_US","og_type":"article","og_title":"Zabbix from Problem to Remediation","og_description":"What is the procedure to setup alarms and automatic remediation in Zabbix.","og_url":"https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/","og_site_name":"dbi Blog","article_published_time":"2023-06-27T10:07:13+00:00","article_modified_time":"2024-09-11T08:18:32+00:00","author":"Middleware Team","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Middleware Team","Est. reading time":"6 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/#article","isPartOf":{"@id":"https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/"},"author":{"name":"Middleware Team","@id":"https:\/\/www.dbi-services.com\/blog\/#\/schema\/person\/8d8563acfc6e604cce6507f45bac0ea1"},"headline":"Zabbix from Problem to Remediation","datePublished":"2023-06-27T10:07:13+00:00","dateModified":"2024-09-11T08:18:32+00:00","mainEntityOfPage":{"@id":"https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/"},"wordCount":636,"commentCount":0,"keywords":["Monitoring","Zabbix"],"articleSection":["Application integration & Middleware"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/","url":"https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/","name":"Zabbix from Problem to Remediation - dbi Blog","isPartOf":{"@id":"https:\/\/www.dbi-services.com\/blog\/#website"},"datePublished":"2023-06-27T10:07:13+00:00","dateModified":"2024-09-11T08:18:32+00:00","author":{"@id":"https:\/\/www.dbi-services.com\/blog\/#\/schema\/person\/8d8563acfc6e604cce6507f45bac0ea1"},"description":"What is the procedure to setup alarms and automatic remediation in Zabbix.","breadcrumb":{"@id":"https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.dbi-services.com\/blog\/zabbix-from-problem-to-remediation\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Accueil","item":"https:\/\/www.dbi-services.com\/blog\/"},{"@type":"ListItem","position":2,"name":"Zabbix from Problem to Remediation"}]},{"@type":"WebSite","@id":"https:\/\/www.dbi-services.com\/blog\/#website","url":"https:\/\/www.dbi-services.com\/blog\/","name":"dbi Blog","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.dbi-services.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/www.dbi-services.com\/blog\/#\/schema\/person\/8d8563acfc6e604cce6507f45bac0ea1","name":"Middleware Team","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/ddcae7ba0f9d1a0e7ae707f0e689e4a9c95bb48ec49c8e6d9cc86d43f4121cb6?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/ddcae7ba0f9d1a0e7ae707f0e689e4a9c95bb48ec49c8e6d9cc86d43f4121cb6?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/ddcae7ba0f9d1a0e7ae707f0e689e4a9c95bb48ec49c8e6d9cc86d43f4121cb6?s=96&d=mm&r=g","caption":"Middleware Team"},"url":"https:\/\/www.dbi-services.com\/blog\/author\/middleware-team\/"}]}},"_links":{"self":[{"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/posts\/26281","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/users\/40"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/comments?post=26281"}],"version-history":[{"count":8,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/posts\/26281\/revisions"}],"predecessor-version":[{"id":26353,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/posts\/26281\/revisions\/26353"}],"wp:attachment":[{"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/media?parent=26281"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/categories?post=26281"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/tags?post=26281"},{"taxonomy":"type","embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/type_dbi?post=26281"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}