{"id":7152,"date":"2016-02-22T14:12:15","date_gmt":"2016-02-22T13:12:15","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/always-on-monitoring-em-13c\/"},"modified":"2016-02-22T14:12:15","modified_gmt":"2016-02-22T13:12:15","slug":"always-on-monitoring-em-13c","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/always-on-monitoring-em-13c\/","title":{"rendered":"Always-on Monitoring EM 13C"},"content":{"rendered":"<p>As the Enterprise Manager Cloud 12c is configured for sending warnings and alerts if a target database is down, what&#8217;s happening\u00a0if the Enterprise Manager Repository database crashes? With Enterprise Manager Cloud Control 12c, a quite good solution is available: after an easy configuration, the management agent is able to run script to notify database administrators there is a problem with the repository. But what happens if the OMS itself is down? Enterprise Manager 13c offers a good solution wit ALWAYS-ON Monitoring.<\/p>\n<p>AOM (Always-on Monitoring) allows the Enterprise Manager Administrators to keep informed of the target\u2019s critical alerts even when the OMS is down.<\/p>\n<p>I installed it on the Enterprise Manager 13c repository for testing but it would obviously be better to create a dedicated database.<\/p>\n<p>Two pre-requisites are mandatory:<\/p>\n<p>Optimizer_adaptive_features = FALSE:<\/p>\n<p>SQL&gt; ALTER SYSTEM SET OPTIMIZER_ADAPTIVE_FEATURES=FALSE SCOPE=BOTH SID=&#8217;*&#8217;;<\/p>\n<pre class=\"brush: sql; gutter: false; first-line: 1\">System altered.<\/pre>\n<p>Chearcter Set AL32UTF8<\/p>\n<pre class=\"brush: sql; gutter: false; first-line: 1\">SQL&gt; SELECT * from nls_database_parameters where parameter='NLS_CHARACTERSET';\nPARAMETER\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0 VALUE\nNLS_CHARACTERSET\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 AL32UTF8\n\n<\/pre>\n<p>The emsca binaries are located in $MW_HOME\/sysman\/ems:<\/p>\n<pre class=\"brush: sql; gutter: false; first-line: 1\">oracle@cloud13c:\/opt\/oracle\/Middleware13c\/sysman\/ems\/ [oms13c] ls\nems_13.1.0.0.0.zip<\/pre>\n<p>We uncompress the binaries:<\/p>\n<pre class=\"brush: sql; gutter: false; first-line: 1\">oracle@cloud13c:\/opt\/oracle\/Middleware13c\/sysman\/ems\/ [oms13c] unzip ems_13.1.0.0.0.zip\nArchive: ems_13.1.0.0.0.zip\n\u00a0\u00a0 creating: ems\/\n\u00a0\u00a0 creating: ems\/lib\/\ninflating: ems\/lib\/com.bea.core.apache.commons.lang_1.0.0.0_2-6.jar\ninflating: ems\/lib\/com.oracle.http_client.http_client_12.1.3.jar\ninflating: ems\/lib\/jackson-core-asl-1.9.2.jar\n\u2026<\/pre>\n<p>We copy the Emkey in the repository:<\/p>\n<pre class=\"brush: sql; gutter: false; first-line: 1\">oracle@cloud13c:\/opt\/oracle\/Middleware13c\/sysman\/ems\/ems\/scripts\/ [oms13c] emctl config emkey -copy_to_repos\nOracle Enterprise Manager Cloud Control 13c Release 1\nCopyright (c) 1996, 2015 Oracle Corporation. All rights reserved.\nEnter Enterprise Manager Root (SYSMAN) Password :\nThe EMKey has been copied to the Management Repository. \nThis operation will cause the EMKey to become unsecure.\nAfter the required operation has been completed, secure the EMKey \nby running \"emctl config emkey -remove_from_repos\".\n\n<\/pre>\n<p>Then we run the emsca configuration script from \/opt\/oracle\/Middleware13c\/sysman\/ems\/ems\/scripts\/<\/p>\n<pre class=\"brush: sql; gutter: false; first-line: 1\">oracle@cloud13c:\/opt\/oracle\/Middleware13c\/sysman\/ems\/ems\/scripts\/ [oms13c] .\/emsca\nOracle Enterprise Manager Cloud Control 13c Release 1\nCopyright (c) 1996, 2015 Oracle Corporation. All rights reserved.\n---------------------------------------------------------------\nAlways-On Monitoring Repository Connection String : cloud13c:1521:EMREP13C\nCreate Always-On Monitoring Repository User [n] : y\nAlways-On Monitoring Repository SYSDBA Username : sys\nAlways-On Monitoring Repository SYSDBA Password :\nAlways-On Monitoring Repository Username [ems] : aom\nAlways-On Monitoring Repository Password [ems] :\nEnterprise Manager Repository Connection String : cloud13c:1521:EMREP13C\nEnterprise Manager Repository Username : sysman\nEnterprise Manager Repository Password :\nCreating Always-On Monitoring repository user aom\nEnter Enterprise Manager Middleware Home : \/opt\/oracle\/Middleware13c\/\nConnecting to Always-On Monitoring repository.\nCreating Always-On Monitoring repository schema\nCreating repository storage for Targets data.\nCreating repository storage for Alerts and Availability data.\nCreating repository storage for Notification Metadata data.\nCreating repository storage for Target Metric Metadata data.\nRegistering Always-On Monitoring instance\nAlways-On Monitoring Upload URL: https:\/\/cloud13c:8081\/upload\nOracle PKI Tool : Version 12.1.3.0.0\nCopyright (c) 2004, 2014, Oracle and\/or its affiliates. All rights reserved.\nCertificate was added to keystore\n\n<\/pre>\n<p>We have to define downtime contacts in order AOM to be able to send notifications:<\/p>\n<pre class=\"brush: sql; gutter: false; first-line: 1\">oracle@cloud13c:\/opt\/oracle\/Middleware13c\/sysman\/ems\/ems\/scripts\/ [oms13c] emcli set_oms_property \n-property_name='oracle.sysman.core.events.ems.downtimeContact'\n -property_value='pierre.sicot@dbi-services.com'\nProperty \"oracle.sysman.core.events.ems.downtimeContact\" \nhas been successfully set to value \"pierre.sicot@dbi-services.com\" on all Management Servers.\nServer restart is not required for the property change to get reflected<\/pre>\n<p>&nbsp;<\/p>\n<p>You can also define downtime contact from the target property:<\/p>\n<pre class=\"brush: sql; gutter: false; first-line: 1\">oracle@cloud13c:\/opt\/oracle\/Middleware13c\/sysman\/ems\/ems\/scripts\/ [oms13c] emcli set_target_property_value \n-property_records=\"TESTDBA:oracle_database:Downtime Contact:pierre.sicot@dbi-services.com\"\nProperties updated successfully<\/pre>\n<p>&nbsp;<\/p>\n<p>Then we synchronize Always-on Monitoring with EM13c for the first time:<\/p>\n<pre class=\"brush: sql; gutter: false; first-line: 1\">oracle@cloud13c:\/opt\/oracle\/Middleware13c\/sysman\/ems\/ems\/scripts\/ [oms13c] .\/emsctl sync\nOracle Enterprise Manager Cloud Control 13c Release 1\nCopyright (c) 1996, 2015 Oracle Corporation. All rights reserved.\n------------------------------------------------------------------\nConnecting to Always-On Monitoring repository.\nStarting synchronization with EM.\nSynchronizing with EM repository: sysman@cloud13c:1521:EMREP13C\nSynchronizing Targets data.\nSynchronizing Alerts and Availability data.\nSynchronizing Notification Metadata data.\nSynchronizing Target Metric Metadata data.\nSynchronization complete at : Fri Feb 12 11:56:32 CET 2016<\/pre>\n<p>&nbsp;<\/p>\n<p>We configure EM to work with Always-on:<\/p>\n<pre class=\"brush: sql; gutter: false; first-line: 1\">oracle@cloud13c:\/opt\/oracle\/Middleware13c\/sysman\/ems\/ems\/scripts\/ [oms13c] emctl set property \n-name \"oracle.sysman.core.events.ems.emsURL\" -value \"https:\/\/cloud13c:8081\/upload\" -sysman_pwd manager1\nOracle Enterprise Manager Cloud Control 13c Release 1\nCopyright (c) 1996, 2015 Oracle Corporation. All rights reserved.\nProperty oracle.sysman.core.events.ems.emsURL has been set to value\nhttps:\/\/cloud13c:8081\/upload for all Management Servers\nOMS restart is not required to reflect the new property value\n\n<\/pre>\n<p>emsctl gives us the possibility to check the status:<\/p>\n<pre class=\"brush: sql; gutter: false; first-line: 1\">oracle@cloud13c:\/opt\/oracle\/Middleware13c\/sysman\/ems\/ems\/scripts\/ [oms13c] .\/emsctl status\nOracle Enterprise Manager Cloud Control 13c Release 1\nCopyright (c) 1996, 2015 Oracle Corporation. All rights reserved.\n------------------------------------------------------------------\nAlways-On Monitoring Version\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 : 13.1.0.0.0\nAlways-On Monitoring Home\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 : \/opt\/oracle\/Middleware13c\/sysman\/ems\/ems\nStarted At\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 : February 12, 2016 12:01:40 PM CET\nLast Repository Sync\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 : February 12, 2016 11:56:21 AM CET\nUpload URL\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 : https:\/\/cloud13c:8081\/upload\nAlways-On Monitoring Process ID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 : 20588\nAlways-On Monitoring Repository\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 : cloud13c:1521:EMREP13C\nEnterprise Manager Repository\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 : cloud13c:1521:EMREP13C\nNotifications Enabled\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 : false\nTotal Downtime Contacts Configured\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 : 1<\/pre>\n<p>&nbsp;<\/p>\n<p>We can check if the URL is present in the agent:<\/p>\n<pre class=\"brush: sql; gutter: false; first-line: 1\">oracle@cloud13c:\/opt\/oracle\/agent13c\/agent_inst\/sysman\/config\/ [agent13c] grep 8081 emd.properties\nEMS_URL=https:\/\/cloud13c:8081\/upload<\/pre>\n<p>&nbsp;<\/p>\n<p>It is also mandatory to enable the notifications (by default it is not \u2026), the enable notification command will automatically run an incremental sync:<\/p>\n<pre class=\"brush: sql; gutter: false; first-line: 1\">oracle@cloud13c:\/opt\/oracle\/Middleware13c\/sysman\/ems\/ems\/scripts\/ [oms13c] .\/emsctl enable_notification\nOracle Enterprise Manager Cloud Control 13c Release 1\nCopyright (c) 1996, 2015 Oracle Corporation. All rights reserved.\n------------------------------------------------------------------\nNotifications have been enabled. There are downtime contacts configured.\nConnecting to Always-On Monitoring repository.\nStarting synchronization with EM.\nSynchronizing with EM repository: sysman@cloud13c:1521:EMREP13C\nSynchronizing Targets data.\nSynchronizing Alerts and Availability data.\nSynchronizing Notification Metadata data.\nSynchronizing Target Metric Metadata data.\nSynchronization complete at : Fri Feb 12 13:31:40 CET 2016\n\n<\/pre>\n<p>We can easily check if AOM is running:<\/p>\n<pre class=\"brush: sql; gutter: false; first-line: 1\">oracle@cloud13c:\/opt\/oracle\/Middleware13c\/sysman\/ems\/ems\/scripts\/ [oms13c] .\/emsctl ping\nOracle Enterprise Manager Cloud Control 13c Release 1\nCopyright (c) 1996, 2015 Oracle Corporation. All rights reserved.\n------------------------------------------------------------------\nAlways-On Monitoring is running.<\/pre>\n<p>&nbsp;<\/p>\n<p>The logfiles are located in $OMS_HOME\/sysman\/ems\/ems\/log:<\/p>\n<pre class=\"brush: sql; gutter: false; first-line: 1\">oracle@cloud13c:\/opt\/oracle\/Middleware13c\/sysman\/ems\/ems\/log\/ [oms13c] ls\nemsca.err emsca.log.0 emsctl.err emsctl.log.0 ems.err ems.log.0 ems.log.0.lck ems.out<\/pre>\n<p>&nbsp;<\/p>\n<p>Finally we can test:<\/p>\n<p>We shutdown the OMS<\/p>\n<pre class=\"brush: sql; gutter: false; first-line: 1\">oracle@cloud13c:\/opt\/oracle\/Middleware13c\/sysman\/ems\/ems\/log\/ [oms13c] emctl stop oms -all\nOracle Enterprise Manager Cloud Control 13c Release 1\nCopyright (c) 1996, 2015 Oracle Corporation. All rights reserved.\nStopping Oracle Management Server...\nWebTier Successfully Stopped\nOracle Management Server Successfully Stopped\nOracle Management Server is Down\nJVMD Engine is Down\nBI Publisher is disabled, to enable BI Publisher on this host, use the 'emctl config oms -enable_bip' command\nStopping BI Publisher Server...\nBI Publisher Server Already Stopped\nBI Publisher is disabled, to enable BI Publisher on this host, use the 'emctl config oms -enable_bip' command\nAdminServer Successfully Stopped\nBI Publisher Server is Down\nBI Publisher is disabled, to enable BI Publisher on this host, use the 'emctl config oms -enable_bip' command<\/pre>\n<p>&nbsp;<\/p>\n<p>We stop our TESTDBA database, and we receive a mail telling us our database target is down:<\/p>\n<p><a href=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/aom1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-7177\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/aom1.png\" alt=\"aom1\" width=\"781\" height=\"173\" \/><\/a><\/p>\n<p>Conclusion:<\/p>\n<p>AOM is a nice feature allowing you to continue to receive critical alerts from your database targets when OMS is down or under maintenance.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>As the Enterprise Manager Cloud 12c is configured for sending warnings and alerts if a target database is down, what&#8217;s happening\u00a0if the Enterprise Manager Repository database crashes? With Enterprise Manager Cloud Control 12c, a quite good solution is available: after an easy configuration, the management agent is able to run script to notify database administrators [&hellip;]<\/p>\n","protected":false},"author":27,"featured_media":7154,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[229],"tags":[215],"type_dbi":[],"class_list":["post-7152","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-database-administration-monitoring","tag-oracle-enterprise-manager"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Always-on Monitoring EM 13C - dbi Blog<\/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.dbi-services.com\/blog\/always-on-monitoring-em-13c\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Always-on Monitoring EM 13C\" \/>\n<meta property=\"og:description\" content=\"As the Enterprise Manager Cloud 12c is configured for sending warnings and alerts if a target database is down, what&#8217;s happening\u00a0if the Enterprise Manager Repository database crashes? 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