{"id":1822,"date":"2023-06-15T12:30:00","date_gmt":"2023-06-15T17:30:00","guid":{"rendered":"https:\/\/www.linuxcloudvps.com\/blog\/?p=1822"},"modified":"2023-08-29T07:08:54","modified_gmt":"2023-08-29T12:08:54","slug":"how-to-install-opennms-on-debian-11","status":"publish","type":"post","link":"https:\/\/www.linuxcloudvps.com\/blog\/how-to-install-opennms-on-debian-11\/","title":{"rendered":"How To Install OpenNMS on Debian 11"},"content":{"rendered":"\n<p>In this tutorial, we are going to explain to you in step-by-step detail how to install <a href=\"https:\/\/www.rosehosting.com\/debian-hosting\/\" title=\"\">OpenNMS on Debian<\/a> 11 OS.<\/p>\n\n\n\n<p>OpenNMS is a free and open-source network monitoring platform written in Java language. It is developed by a group of developers, users, and the OpenNMS community, which makes the software compatible with multiple operating systems such as Linux, Windows, macOS and etc. There are many features offered by this software, such as service assurance, service monitors, grafana support, easy integration, etc.<\/p>\n\n\n\n<!--more-->\n\n\n\n<p>Installing OpenNMS on Debian 11 is straightforward, which may take up to 20 minutes. Let&#8217;s get started!<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A server with Debian 11 as OS<\/li>\n\n\n\n<li>User privileges: root or non-root user with <a href=\"https:\/\/www.linuxcloudvps.com\/blog\/sudo-command-example\/\" title=\"\">sudo privileges<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Step 1. Update the System<\/h2>\n\n\n\n<p>Before we start with the installation, we need to update the system packages to their latest version available:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">sudo apt-get update -y &amp;&amp; sudo apt-get upgrade -y<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Step 2. Install Java<\/h2>\n\n\n\n<p>Since Tomcat is written in Java, we need to install it with the following command:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">sudo apt-get install default-jdk -y<\/pre>\n\n\n\n<p>To verify the installed version, execute the following command:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">java --version<\/pre>\n\n\n\n<p>You should get output similar to this:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">root@host:~#  java --version\nopenjdk 11.0.18 2023-01-17\nOpenJDK Runtime Environment (build 11.0.18+10-post-Debian-1deb11u1)\nOpenJDK 64-Bit Server VM (build 11.0.18+10-post-Debian-1deb11u1, mixed mode, sharing)\n<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Step 3. Install OpenNMS<\/h2>\n\n\n\n<p>First of all, we need to install some dependencies:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">apt-get install curl gnupg2 wget -y<\/pre>\n\n\n\n<p>First, we need to add the OpenNMS repository and GPG key because they are not added in the Debian 11 repository by default. To do that, create the following file:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">touch \/etc\/apt\/sources.list.d\/opennms.list<\/pre>\n\n\n\n<p>Once the file is created, open it with your favorite browser and enter the following lines:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">deb https:\/\/debian.opennms.org stable main\ndeb-src https:\/\/debian.opennms.org stable main\n<\/pre>\n\n\n\n<p>Save the file and close it. Next, to import the GPG key execute the following command:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">wget -O - https:\/\/debian.opennms.org\/OPENNMS-GPG-KEY | apt-key add -<\/pre>\n\n\n\n<p>Update the system and install OpenNMS:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">sudo apt update -y\n\nsudo apt upgrade -y\n\nsudo apt install opennms -y\n<\/pre>\n\n\n\n<p>During the installation of OpenNMS PostgreSQL is installed and starting as well. Once the OpenNMS is installed, you can check the status of the PostgreSQL with the following command:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">systemctl status postgresql<\/pre>\n\n\n\n<p>If everything is OK, you should get the following output:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">root@test:~# systemctl status postgresql\n\u25cf postgresql.service - PostgreSQL RDBMS\n     Loaded: loaded (\/lib\/systemd\/system\/postgresql.service; enabled; vendor preset: enabled)\n     Active: active (exited) since Tue 2023-05-16 02:27:51 CDT; 5min ago\n   Main PID: 51877 (code=exited, status=0\/SUCCESS)\n      Tasks: 0 (limit: 4661)\n     Memory: 0B\n        CPU: 0\n     CGroup: \/system.slice\/postgresql.service\n\nMay 16 02:27:51 test.vps systemd[1]: Starting PostgreSQL RDBMS...\nMay 16 02:27:51 test.vps systemd[1]: Finished PostgreSQL RDBMS.\n<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Step 4. Create OpenNMS Database and User<\/h2>\n\n\n\n<p>To create an OpenNMS user and database, login to the PostgreSQL command line and execute these lines of code:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">su - postgres\ncreateuser opennms\npsql -c \"ALTER USER opennms WITH PASSWORD 'opennms';\"\ncreatedb -O opennms opennms\npsql -c \"ALTER USER postgres WITH PASSWORD 'YourStrongPasswordHere';\"\n<\/pre>\n\n\n\n<p>Once the database and database user are created, open the following file and set the credentials you set above:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">sudo nano \/usr\/share\/opennms\/etc\/opennms-datasources.xml<\/pre>\n\n\n\n<p>The file should look like this:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">  \n\n  &amp;lt;datasource-configuration xmlns:this=\"http:\/\/xmlns.opennms.org\/xsd\/config\/opennms-datasources\"\n  xmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\"\n  xsi:schemaLocation=\"http:\/\/xmlns.opennms.org\/xsd\/config\/opennms-datasources\n  http:\/\/www.opennms.org\/xsd\/config\/opennms-datasources.xsd \"&amp;gt;\n\n  &amp;lt;connection-pool factory=\"org.opennms.core.db.HikariCPConnectionFactory\"\n    idleTimeout=\"600\"\n    loginTimeout=\"3\"\n    minPool=\"50\"\n    maxPool=\"50\"\n    maxSize=\"50\" \/&amp;gt;\n\n  &amp;lt;jdbc-data-source name=\"opennms\"\n                    database-name=\"opennms\"\n                    class-name=\"org.postgresql.Driver\"\n                    url=\"jdbc:postgresql:\/\/localhost:5432\/opennms\"\n                  &lt;strong&gt; user-name=\"opennms\"\n                    password=\"opennms\"&lt;\/strong&gt; \/&amp;gt;\n\n  &amp;lt;jdbc-data-source name=\"opennms-admin\"\n                    database-name=\"template1\"\n                    class-name=\"org.postgresql.Driver\"\n                    url=\"jdbc:postgresql:\/\/localhost:5432\/template1\"\n                    &lt;strong&gt;user-name=\"postgres\"\n                    password=\"YourStrongPasswordHere\"&lt;\/strong&gt; \/&amp;gt;\n&amp;lt;\/datasource-configuration&amp;gt;\n\n<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Step 5. Finish OpenNMS Installation<\/h2>\n\n\n\n<p>Now, when the database configuration is set, we can finish the installation. First, execute the following command to detect of Java environment:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">sudo -u opennms \/usr\/share\/opennms\/bin\/runjava -s<\/pre>\n\n\n\n<p>Next, run the following command to complete the OpenNMS setup:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">sudo -u opennms \/usr\/share\/opennms\/bin\/install -dis<\/pre>\n\n\n\n<p>After executing this command, you should get the following output:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">Finished in 0 seconds\n\nProcessing RemotePollerServiceConfigMigratorOffline: Remove deprecated RemotePoller service entry from service-configuration.xml, see NMS-12684\n- Running pre-execution phase\n  Creating backup of \/usr\/share\/opennms\/etc\/service-configuration.xml\n    Zipping \/usr\/share\/opennms\/etc\/service-configuration.xml\n- Running execution phase\n  Current configuration: 32 services.\n  A service entry named 'OpenNMS:Name=PerspectivePoller' already exists.\n  Final configuration: 32 services.\n- Saving the execution state\n- Running post-execution phase\n  Removing backup \/usr\/share\/opennms\/etc\/service-configuration.xml.zip\n\nFinished in 0 seconds\n\nProcessing SystemIDMigratorOffline: Updates OpenNMS system ID to a random UUID.\n- Running pre-execution phase\n- Running execution phase\n- Saving the execution state\n- Running post-execution phase\n\nFinished in 0 seconds\n\n\nUpgrade completed successfully!<\/pre>\n\n\n\n<p>After successfull setup, start and enable the <strong>opennms<\/strong> service.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">sudo systemctl start opennms &amp;&amp; sudo systemctl enable opennms<\/pre>\n\n\n\n<p>To check the status of the OpenNMS service<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">sudo systemctl status opennms<\/pre>\n\n\n\n<pre class=\"wp-block-preformatted\">root@host:~# sudo systemctl status opennms\n\u25cf opennms.service - OpenNMS server\n     Loaded: loaded (\/lib\/systemd\/system\/opennms.service; enabled; vendor preset: enabled)\n     Active: active (running) since Tue 2023-05-16 05:19:18 CDT; 29min ago\n   Main PID: 10324 (java)\n      Tasks: 480 (limit: 4661)\n     Memory: 2.2G\n        CPU: 8min 40.534s\n     CGroup: \/system.slice\/opennms.service\n             \u251c\u250010323 bash \/usr\/share\/opennms\/bin\/opennms -s start\n             \u2514\u250010324 \/usr\/lib\/jvm\/java-11-openjdk-amd64\/bin\/java --add-modules=java.base,java.compiler,java.datatransfer,java.desktop,java.instrument,java.logging,java\n<\/pre>\n\n\n\n<p>Now, you can access the OpenNMS installation at <strong>http:\/\/YourServerIPAddress:8980\/opennms\/<\/strong> using the <strong>admin<\/strong> as username and password.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"900\" height=\"290\" src=\"https:\/\/www.linuxcloudvps.com\/blog\/wp-content\/uploads\/2023\/05\/opennms-installation.webp\" alt=\"\" class=\"wp-image-1829\" srcset=\"https:\/\/www.linuxcloudvps.com\/blog\/wp-content\/uploads\/2023\/05\/opennms-installation.webp 900w, https:\/\/www.linuxcloudvps.com\/blog\/wp-content\/uploads\/2023\/05\/opennms-installation-470x151.webp 470w, https:\/\/www.linuxcloudvps.com\/blog\/wp-content\/uploads\/2023\/05\/opennms-installation-768x247.webp 768w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><\/figure>\n\n\n\n<p>Once logged in, immediately change the admin password:<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"246\" height=\"246\" src=\"https:\/\/www.linuxcloudvps.com\/blog\/wp-content\/uploads\/2023\/05\/opennms-change-admin-password.webp\" alt=\"\" class=\"wp-image-1830\"\/><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"478\" height=\"414\" src=\"https:\/\/www.linuxcloudvps.com\/blog\/wp-content\/uploads\/2023\/05\/opennms-confirm-new-password.webp\" alt=\"\" class=\"wp-image-1831\" srcset=\"https:\/\/www.linuxcloudvps.com\/blog\/wp-content\/uploads\/2023\/05\/opennms-confirm-new-password.webp 478w, https:\/\/www.linuxcloudvps.com\/blog\/wp-content\/uploads\/2023\/05\/opennms-confirm-new-password-346x300.webp 346w\" sizes=\"(max-width: 478px) 100vw, 478px\" \/><\/figure>\n<\/div>\n\n\n<p>Our intention with this post was to make installing OpenNMS on Debian 11 a breeze for you. Now, we&#8217;re passing the baton to you:<\/p>\n\n\n\n<p>Do you feel there&#8217;s something critical we missed, or is there a step that you&#8217;re still unclear about? What other detailed instructional tutorials would you appreciate seeing on our blog?<\/p>\n\n\n\n<p>Your feedback is valuable to us, so please leave a comment below.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this tutorial, we are going to explain to you in step-by-step detail how to install OpenNMS on Debian 11 OS. OpenNMS is a free and open-source network monitoring platform written in Java language. It is developed by a group of developers, users, and the OpenNMS community, which makes the software compatible with multiple operating &#8230; <a title=\"How To Install OpenNMS on Debian 11\" class=\"read-more\" href=\"https:\/\/www.linuxcloudvps.com\/blog\/how-to-install-opennms-on-debian-11\/\" aria-label=\"More on How To Install OpenNMS on Debian 11\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":1834,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[207,274,13,208],"tags":[110,168,276],"class_list":["post-1822","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guide","category-open-source","category-tutorials","category-ubuntu","tag-debian","tag-how-to-install","tag-opennms"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How To Install OpenNMS on Debian 11 | LinuxCloudVPS Blog<\/title>\n<meta name=\"description\" content=\"In this tutorial, we are going to explain to you in step-by-step detail how to install OpenNMS on Debian 11 OS. 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