{"id":538,"date":"2020-10-24T20:27:44","date_gmt":"2020-10-24T19:27:44","guid":{"rendered":"http:\/\/thomas-kopton.de\/vblog\/?p=538"},"modified":"2020-10-25T13:24:21","modified_gmt":"2020-10-25T12:24:21","slug":"checking-ssl-tls-certificate-validity-period-using-vrealize-operations-application-monitoring-agents","status":"publish","type":"post","link":"https:\/\/thomas-kopton.de\/vblog\/?p=538","title":{"rendered":"Checking SSL\/TLS Certificate Validity Period using vRealize Operations Application Monitoring Agents"},"content":{"rendered":"\n<p>In my 2019 article &#8220;Checking SSL\/TLS Certificate Validity Period using vRealize Operations and End Point Operations Agent&#8221; on VMware Cloud Management Blog <a href=\"https:\/\/blogs.vmware.com\/management\/2019\/05\/checking-ssl-tls-certificate-validity-period-using-vrealize-operations-and-end-point-operations-agent.html\">(https:\/\/blogs.vmware.com\/management\/2019\/05\/checking-ssl-tls-certificate-validity-period-using-vrealize-operations-and-end-point-operations-agent.html<\/a>) I have described how to check the remaining validity of SSL\/TLS certificates.<\/p>\n\n\n\n<p>The method back then was to utilize the End<strong> <\/strong>Point Operations Agents.<\/p>\n\n\n\n<p>Since <strong><span style=\"color:#0f6d96\" class=\"has-inline-color\">vRealize Operations<\/span><\/strong> 7.5 new <strong><span style=\"color:#0f6d96\" class=\"has-inline-color\">Application Monitoring<\/span><\/strong> capabilities have been introduced including a new <span style=\"color:#0f6d96\" class=\"has-inline-color\"><strong>Telegraf-based agent<\/strong>.<\/span><\/p>\n\n\n\n<p>In this blog post I will describe how to use the new agent to implement an easy solution to continuously check the validity of SSL\/TLS certificates. The remaining days until expiration will be displayed as a simple dashboards in vROps.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Application Monitoring  &#8211; Agent Configuration<\/h4>\n\n\n\n<p>After deploying the <strong><span style=\"color:#0f6d96\" class=\"has-inline-color\">Application Remote Collector<\/span><\/strong> (ARC) vRealize Operations is ready to install agents on monitored virtual machines.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/install-agent-01.png\"><img loading=\"lazy\" decoding=\"async\" width=\"2106\" height=\"806\" src=\"https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/install-agent-01.png\" alt=\"\" class=\"wp-image-544\" srcset=\"https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/install-agent-01.png 2106w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/install-agent-01-300x115.png 300w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/install-agent-01-1024x392.png 1024w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/install-agent-01-768x294.png 768w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/install-agent-01-1536x588.png 1536w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/install-agent-01-2048x784.png 2048w\" sizes=\"auto, (max-width: 2106px) 100vw, 2106px\" \/><\/a><figcaption><em>Figure 1: Installing Application Monitoring agent<\/em><\/figcaption><\/figure>\n\n\n\n<p>Once the agent has been installed and is running, the actual configuration of the agent becomes available.<\/p>\n\n\n\n<p>The agent is basically doing two jobs. The agent:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>discovers supported <strong><span style=\"color:#0f6d96\" class=\"has-inline-color\">applications<\/span><\/strong> and can be configured to monitor those applications<\/li><li>provide the ability to run <span style=\"color:#0f6d96\" class=\"has-inline-color\"><strong>remote check<\/strong>,<\/span> like ICMP or TCP tests<\/li><li>provide the ability to <strong><span style=\"color:#0f6d96\" class=\"has-inline-color\">run custom scripts<\/span><\/strong> locally<\/li><\/ul>\n\n\n\n<p>The ability to run scripts and report the integer output as metric back to vROps is exactly what we need to run certificate checks.<\/p>\n\n\n\n<p>The actual script is fairly easy and available, together with the vROps dashboard, via VMware Code:<\/p>\n\n\n\n<p><a href=\"https:\/\/code.vmware.com\/samples?id=7464\">https:\/\/code.vmware.com\/samples?id=7464<\/a><\/p>\n\n\n\n<p>To let the agent run the script and provide a metric, we configure the agent with few options.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-script-01.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"290\" src=\"https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-script-01-1024x290.png\" alt=\"\" class=\"wp-image-548\" srcset=\"https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-script-01-1024x290.png 1024w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-script-01-300x85.png 300w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-script-01-768x217.png 768w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-script-01-1536x435.png 1536w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-script-01-2048x580.png 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption><em>Figure 2: Configure Custom Script<\/em><\/figcaption><\/figure>\n\n\n\n<p>The script itself expects two parameters, the endpoint to check and the port number.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-script-02.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"864\" src=\"https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-script-02-1024x864.png\" alt=\"\" class=\"wp-image-550\" srcset=\"https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-script-02-1024x864.png 1024w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-script-02-300x253.png 300w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-script-02-768x648.png 768w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-script-02-1536x1296.png 1536w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-script-02.png 1882w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption><em>Figure 3: Custom Script options<\/em><\/figcaption><\/figure>\n\n\n\n<p>One agent can run multiple instances of the same script with different options or completely different scripts.<\/p>\n\n\n\n<p>All scripts need to be placed in <code>\/opt\/vmware<\/code> and the <code>arcuser<\/code> (as per default configuration) needs the execute permissions.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Dashboard<\/h4>\n\n\n\n<p>The running custom scripts provide a metric per script. The values can be used to populate dashboards or views or serve as metrics for symptoms and alert definitions.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/script-metrics.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"435\" src=\"https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/script-metrics-1024x435.png\" alt=\"\" class=\"wp-image-554\" srcset=\"https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/script-metrics-1024x435.png 1024w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/script-metrics-300x127.png 300w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/script-metrics-768x326.png 768w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/script-metrics-1536x653.png 1536w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/script-metrics-2048x870.png 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption><em>Figure 4: Custom Scripts as metrics<\/em><\/figcaption><\/figure>\n\n\n\n<p>The dashboard showing is very simple but with the color coding if the widget it is easy to spot endpoints with expiring SSL\/TLS certificates and take appropriate actions.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/dashboard-01.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"642\" src=\"https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/dashboard-01-1024x642.png\" alt=\"\" class=\"wp-image-541\" srcset=\"https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/dashboard-01-1024x642.png 1024w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/dashboard-01-300x188.png 300w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/dashboard-01-768x482.png 768w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/dashboard-01-1536x963.png 1536w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/dashboard-01.png 1958w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption><em>Figure 5: SSL\/TLS Certificate Validity dashboard<\/em><\/figcaption><\/figure>\n\n\n\n<p>You will need to adjust the widget settings to include your metrics.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-dashboard.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"624\" src=\"https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-dashboard-1024x624.png\" alt=\"\" class=\"wp-image-560\" srcset=\"https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-dashboard-1024x624.png 1024w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-dashboard-300x183.png 300w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-dashboard-768x468.png 768w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-dashboard-1536x936.png 1536w, https:\/\/thomas-kopton.de\/vblog\/wp-content\/uploads\/2020\/10\/configure-dashboard-2048x1249.png 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption><em>Figure 6: Widget configuration<\/em><\/figcaption><\/figure>\n\n\n\n<p><strong>Stay safe.<\/strong><\/p>\n\n\n\n<p>Thomas \u2013&nbsp;<a href=\"https:\/\/twitter.com\/ThomasKopton\">https:\/\/twitter.com\/ThomasKopton<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In my 2019 article &#8220;Checking SSL\/TLS Certificate Validity Period using vRealize Operations and End Point Operations Agent&#8221; on VMware Cloud Management Blog (https:\/\/blogs.vmware.com\/management\/2019\/05\/checking-ssl-tls-certificate-validity-period-using-vrealize-operations-and-end-point-operations-agent.html) I have described how to check the remaining validity of SSL\/TLS certificates. The method back then was to utilize the End Point Operations Agents. Since vRealize Operations 7.5 new Application Monitoring capabilities &#8230;<\/p>\n","protected":false},"author":1,"featured_media":541,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13,34,2],"tags":[17,43,3],"class_list":["post-538","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dashboard","category-vrealize-operations","category-vrops","tag-dashboard","tag-telegraf","tag-vrops"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Checking SSL\/TLS Certificate Validity Period using vRealize Operations Application Monitoring Agents - TOMsOps<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/thomas-kopton.de\/vblog\/?p=538\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Checking SSL\/TLS Certificate Validity Period using vRealize Operations Application Monitoring Agents - TOMsOps\" \/>\n<meta property=\"og:description\" content=\"In my 2019 article &#8220;Checking SSL\/TLS Certificate Validity Period using vRealize Operations and End Point Operations Agent&#8221; on VMware Cloud Management Blog (https:\/\/blogs.vmware.com\/management\/2019\/05\/checking-ssl-tls-certificate-validity-period-using-vrealize-operations-and-end-point-operations-agent.html) I have described how to check the remaining validity of SSL\/TLS certificates. 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