{"id":774,"date":"2013-03-30T11:50:07","date_gmt":"2013-03-30T10:50:07","guid":{"rendered":"http:\/\/www.streppone.it\/cosimo\/blog\/?p=774"},"modified":"2013-03-30T11:53:37","modified_gmt":"2013-03-30T10:53:37","slug":"logging-nagios-remote-commands","status":"publish","type":"post","link":"https:\/\/www.streppone.it\/cosimo\/blog\/2013\/03\/logging-nagios-remote-commands\/","title":{"rendered":"Logging nagios remote commands"},"content":{"rendered":"

Quick trick, I needed it to debug execution of remote nagios<\/strong> commands.<\/p>\n

Just drop this file into \/var\/nagios\/.bashrc<\/code>, assuming your local nagios<\/code> user is configured to use the \/bin\/bash<\/code> shell:<\/p>\n

\r\n#!\/bin\/bash\r\n#\r\n# Log every command run by the nagios user\r\n# into \/var\/log\/auth.log (at least on Debian and derivatives)\r\n#\r\ntrap 'logger -p auth.info -t nagios \"Running $BASH_COMMAND\"' DEBUG\r\n<\/pre>\n
The trap<\/code> function executes a given command or list of commands when the list of signals specified as arguments are raised,
\nas in:<\/p>\n
trap [COMMAND] [SIGNALS]<\/pre>\n
The DEBUG<\/code> signal is special: it will fire every time a command is executed. Using logger<\/code> ensures that whatever command the nagios user is trying to execute will be logged.<\/p>\n
Last bit, how do you get the command text? It’s available in the $BASH_COMMAND<\/code> variable.<\/p>\n
Here’s an extract of the resulting log information:<\/p>\n
\r\nMar 30 10:48:05 big1 nagios: Running \/usr\/lib\/nagios\/plugins\/check_cpu -i 5 -w 90 -c 98\r\nMar 30 10:49:42 big1 nagios: Running \/usr\/lib\/nagios\/plugins\/check_tcp -p 3306\r\nMar 30 10:49:42 big1 nagios: Running \/var\/nagios\/libexec\/check_load -w40,40,40 -c50,50,50\r\nMar 30 10:50:26 big1 nagios: Running \/usr\/lib\/nagios\/plugins\/check_procs -w 1:1 -c 1:1 -a \/usr\/sbin\/cron\r\nMar 30 10:50:44 big1 nagios: Running \/usr\/lib\/nagios\/plugins\/check_disk -w 20 -c 10 -r \"^\/(ssd|store[1-3])?$\"\r\n...\r\n<\/pre>\n
To learn more about traps, here’s a web search on “bash traps”<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"
Quick trick, I needed it to debug execution of remote nagios commands. Just drop this file into \/var\/nagios\/.bashrc, assuming your local nagios user is configured to use the \/bin\/bash shell: #!\/bin\/bash # # Log every command run by the nagios user # into \/var\/log\/auth.log (at least on Debian and derivatives) # trap ‘logger -p auth.info […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[512],"tags":[520,254,248,519,521,61],"yoast_head":"\nLogging nagios remote commands - Random hacking<\/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:\/\/www.streppone.it\/cosimo\/blog\/2013\/03\/logging-nagios-remote-commands\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Logging nagios remote commands - Random hacking\" \/>\n<meta property=\"og:description\" content=\"Quick trick, I needed it to debug execution of remote nagios commands. Just drop this file into \/var\/nagios\/.bashrc, assuming your local nagios user is configured to use the \/bin\/bash shell: #!\/bin\/bash # # Log every command run by the nagios user # into \/var\/log\/auth.log (at least on Debian and derivatives) # trap 'logger -p auth.info […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.streppone.it\/cosimo\/blog\/2013\/03\/logging-nagios-remote-commands\/\" \/>\n<meta property=\"og:site_name\" content=\"Random hacking\" \/>\n<meta property=\"article:published_time\" content=\"2013-03-30T10:50:07+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2013-03-30T10:53:37+00:00\" \/>\n<meta name=\"author\" content=\"cosimo\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"cosimo\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.streppone.it\/cosimo\/blog\/2013\/03\/logging-nagios-remote-commands\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.streppone.it\/cosimo\/blog\/2013\/03\/logging-nagios-remote-commands\/\"},\"author\":{\"name\":\"cosimo\",\"@id\":\"https:\/\/www.streppone.it\/cosimo\/blog\/#\/schema\/person\/c443bedbf6ecf99550d6395620801df1\"},\"headline\":\"Logging nagios remote commands\",\"datePublished\":\"2013-03-30T10:50:07+00:00\",\"dateModified\":\"2013-03-30T10:53:37+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.streppone.it\/cosimo\/blog\/2013\/03\/logging-nagios-remote-commands\/\"},\"wordCount\":118,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.streppone.it\/cosimo\/blog\/#\/schema\/person\/c443bedbf6ecf99550d6395620801df1\"},\"keywords\":[\".bashrc\",\"bash\",\"debian\",\"nagios\",\"trap\",\"webops\"],\"articleSection\":[\"Operations\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.streppone.it\/cosimo\/blog\/2013\/03\/logging-nagios-remote-commands\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.streppone.it\/cosimo\/blog\/2013\/03\/logging-nagios-remote-commands\/\",\"url\":\"https:\/\/www.streppone.it\/cosimo\/blog\/2013\/03\/logging-nagios-remote-commands\/\",\"name\":\"Logging nagios remote commands - Random hacking\",\"isPartOf\":{\"@id\":\"https:\/\/www.streppone.it\/cosimo\/blog\/#website\"},\"datePublished\":\"2013-03-30T10:50:07+00:00\",\"dateModified\":\"2013-03-30T10:53:37+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.streppone.it\/cosimo\/blog\/2013\/03\/logging-nagios-remote-commands\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.streppone.it\/cosimo\/blog\/2013\/03\/logging-nagios-remote-commands\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.streppone.it\/cosimo\/blog\/2013\/03\/logging-nagios-remote-commands\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.streppone.it\/cosimo\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Logging nagios remote commands\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.streppone.it\/cosimo\/blog\/#website\",\"url\":\"https:\/\/www.streppone.it\/cosimo\/blog\/\",\"name\":\"Random hacking\",\"description\":\"Assume nothing. 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