{"id":11551,"date":"2019-03-14T12:10:31","date_gmt":"2019-03-14T12:10:31","guid":{"rendered":"http:\/\/www.appservgrid.com\/paw92\/?p=11551"},"modified":"2019-03-14T12:10:31","modified_gmt":"2019-03-14T12:10:31","slug":"how-to-install-and-configure-zabbix-agents-on-remote-linux-systems-part-3","status":"publish","type":"post","link":"https:\/\/www.appservgrid.com\/paw92\/index.php\/2019\/03\/14\/how-to-install-and-configure-zabbix-agents-on-remote-linux-systems-part-3\/","title":{"rendered":"How to Install and Configure Zabbix Agents on Remote Linux Systems \u2013 Part 3"},"content":{"rendered":"

Continuing\u00a0Zabbix series<\/b>, this tutorial will guide you on how you can install and configure Zabbix agents on\u00a0Linux<\/strong>\u00a0(Debian based systems and\u00a0CentOS<\/strong>) in order to actively monitor local resources on remote systems.<\/p>\n

\n

\"Add<\/a><\/p>\n

Add Remote Linux Host to Zabbix Server \u2013 Part 3<\/p>\n<\/div>\n

The main job of zabbix agents consists in gathering local information from the targets where they run and send the data to a central Zabbix server to be further processed and analyzed.<\/p>\n

Requirements<\/h4>\n

Install and Configure\u00a0Zabbix 2.4.5<\/strong>\u00a0on\u00a0Debian 8<\/strong>\u00a0and\u00a0RHEL<\/strong>\/CentOS 7<\/strong>.<\/p>\n

    \n
  1. Setting Up Zabbix Monitoring on Debian and CentOS based Systems<\/a><\/li>\n<\/ol>\n

    Step 1: Install Zabbix Agents in Linux Systems<\/h3>\n

    1.<\/strong>\u00a0Depending on the Linux distribution you are running, go to\u00a0Zabbix download<\/a>\u00a0page, grab the latest version of the available agents binary packages using a tool such as\u00a0wget<\/strong>\u00a0or\u00a0curl<\/strong>\u00a0and install it on your machine using the distribution specific package manager \u2013\u00a0Yum<\/a>,\u00a0Rpm<\/a>\u00a0or\u00a0Dpkg<\/a>.<\/p>\n

    On Debian based Systems<\/h4>\n

    For\u00a0Debian<\/strong>\u00a0systems (including latest release \u2013\u00a0Debian 8<\/strong>\u00a0Jessie) use the following steps to download and install Zabbbix Agent:<\/p>\n

    $ wget http:\/\/repo.zabbix.com\/zabbix\/2.4\/debian\/pool\/main\/z\/zabbix\/zabbix-agent_2.4.0-1+wheezy_amd64.deb  \r\n$ sudo dpkg -i zabbix-agent_2.4.0-1+wheezy_amd64.deb\r\n<\/pre>\n
    On CentOS based Systems<\/h4>\n
    For\u00a0CentOS<\/strong>\u00a0alike systems, download the\u00a0.rpm<\/strong>\u00a0packaged for the distribution specific release number, using the same page as above, and install it using rpm package manager.<\/p>\n
    In order to automatically manage missing dependency issues and install the agent using one shot use the\u00a0yum<\/strong>command followed by the binary package download link, as in the example below used for installing the agent on CentOS 7:<\/p>\n
    # rpm -Uvh http:\/\/repo.zabbix.com\/zabbix\/2.4\/rhel\/7\/x86_64\/zabbix-agent-2.4.1-2.el7.x86_64.rpm\r\n<\/pre>\n
    \n
    \"Install<\/a><\/p>\n
    Install Zabbix Agent on CentOS 7<\/p>\n<\/div>\n
    Step 2: Configure and Test Zabbix Agent in Linux<\/h3>\n
    2.<\/strong>\u00a0The next logical step after installing the packages on the system is to open\u00a0Zabbix<\/strong>\u00a0agent configuration file located in\u00a0\/etc\/zabbix\/<\/strong>\u00a0system path on both major distributions and instruct the program to send all the collected information to Zabbix server in order to be analyzed and processed.<\/p>\n
    Therefore, open\u00a0zabbix_agentd.conf<\/strong>\u00a0file with your favorite text editor, find the below lines (use the screenshots as a guide), uncomment them and make the following changes:<\/p>\n
    # nano \/etc\/zabbix\/zabbix_agentd.conf\r\n<\/pre>\n
    add zabbix server IP address and hostname as shown below.<\/p>\n
    Configure Zabbix Agent \u2013 zabbix_agentd.conf<\/div>\n
    Server=IP of Zabbix Server\r\nServerActive=IP of Zabbix Server\r\nHostname=use the FQDN of the node where the agent runs\r\n<\/pre>\n
    \n
    \"Add<\/a><\/p>\n
    Add Zabbix Server IP Address<\/p>\n<\/div>\n
    \n
    \"Add<\/a><\/p>\n
    Add Zabbix Server Active IP Address<\/p>\n<\/div>\n
    \n
    \"Add<\/a><\/p>\n
    Add Zabbix Agent Hostname<\/p>\n<\/div>\n
    3.<\/strong>\u00a0Once you\u2019ve finished editing the Zabbix agent configuration file with the required values, restart the daemon using the following command, then use\u00a0netstat command<\/a>\u00a0to verify if the daemon has been started and operates on the specific port \u2013\u00a010050\/tcp<\/strong>:<\/p>\n
    $ sudo systemctl restart zabbix-agent\r\n$ sudo netstat -tulpn|grep zabbix\r\n<\/pre>\n
    For older distributions use the service command to manage zabbix agent daemon:<\/p>\n
    $ sudo service zabbix-agent restart\r\n$ sudo netstat -tulpn|grep zabbix\r\n<\/pre>\n
    \n
    \"Start<\/a><\/p>\n
    Start Zabbix Agent<\/p>\n<\/div>\n
    4.<\/strong>\u00a0If your system is behind a firewall then you need to open\u00a010050\/tcp<\/strong>\u00a0port on the system in order to reach through Zabbix server.<\/p>\n
    For\u00a0Debian<\/strong>\u00a0based systems, including\u00a0Ubuntu<\/strong>, you can use\u00a0ufw tool<\/a>\u00a0to open the port and on\u00a0CentOS 7<\/strong>\u00a0you can use\u00a0Firewalld utility<\/a>\u00a0to manage the firewall rules as the below examples:<\/p>\n
    $ sudo ufw allow 10050\/tcp  [On Debian<\/strong> based systems]\r\n<\/pre>\n
    $ sudo firewall-cmd --add-port=10050\/tcp                [For centOS 7<\/strong> on-fly rule]\r\n$ sudo firewall-cmd --add-port=10050\/tcp --permanent    [For centOS 7<\/strong> permanent rule]\r\n<\/pre>\n
    For older distributions such as\u00a0centOS 6<\/strong>\u00a0or unmanaged firewalls through specific utilities use the powerful\u00a0iptables<\/strong>\u00a0command to open ports:<\/p>\n
    # iptables -A INPUT -p tcp -m tcp --dport 10050 -j ACCEPT\r\n<\/pre>\n
    5. Finally, in order to test if you can reach Zabbix Agent from Zabbix Server, use\u00a0Telnet<\/strong>\u00a0command from Zabbix server machine to the IP addresses of the machines that run the agents, as illustrated below (don\u2019t worry about the thrown error from agents):<\/p>\n
    # telnet zabbix_agent_IP 10050\r\n<\/pre>\n
    \n
    \"Check<\/a><\/p>\n
    Check Zabbix Agent Connection<\/p>\n<\/div>\n
    Step 3: Add Zabbix Agent Monitored Host to Zabbix Server<\/h3>\n
    6.<\/strong>\u00a0On the next step it\u2019s time to move to Zabbix server web console and start adding the hosts which run zabbix agent in order to be monitored by the server.<\/p>\n
    Go to\u00a0Configuration<\/strong>\u00a0->\u00a0Hosts<\/strong>\u00a0->\u00a0Create Host<\/strong>\u00a0->\u00a0Host<\/strong>\u00a0tab and fill the\u00a0Host name<\/strong>\u00a0field with the FQDN of the monitored zabbix agent machine, use the same value as above for Visible name field.<\/p>\n
    Next, add this host to a group of monitored servers and use the IP Address of the monitored machine at Agent interfaces field \u2013 alternatively you can also use DNS resolution if it\u2019s the case. Use the below screenshots as a guide.<\/p>\n
    \n
    \"Add<\/a><\/p>\n
    Add Linux Host to Zabbix Monitoring<\/p>\n<\/div>\n
    \n
    \"Add<\/a><\/p>\n
    Add Linux Host to Zabbix Host Group<\/p>\n<\/div>\n
    7.<\/strong>\u00a0Next, move to\u00a0Templates<\/strong>\u00a0tab and hit\u00a0Select<\/strong>. A new window with templates should open. Choose\u00a0Template OS Linux<\/strong>\u00a0then scroll down and hit on Select button to add it and automatically close the window.<\/p>\n
    \n
    \"Add<\/a><\/p>\n
    Add Zabbix Linux OS Template<\/p>\n<\/div>\n
    \n
    \"Select<\/a><\/p>\n
    Select Linux OS Template<\/p>\n<\/div>\n
    8.<\/strong>\u00a0Once the template appears to\u00a0Link new template<\/strong>\u00a0box, hit on\u00a0Add<\/strong>\u00a0text to link it to zabbix server, then hit on the lower\u00a0Add<\/strong>\u00a0button to finish the process and completely add the monitored host. The visible name of the monitored host should now appear hosts window.<\/p>\n
    \n
    \"Link<\/a><\/p>\n
    Link New Linux OS Template<\/p>\n<\/div>\n
    \n
    \"Add<\/a><\/p>\n
    Add Linux OS Template<\/p>\n<\/div>\n
    \n
    \"Added<\/a><\/p>\n
    Added Linux Host to Zabbix<\/p>\n<\/div>\n
    That\u2019s all! Just assure that the host\u00a0Status<\/strong>\u00a0is set to\u00a0Enabled<\/strong>\u00a0and wait a few minutes in order for Zabbix server to contact the agent, process the received data and inform or eventually alert you if something goes bad on the monitored target.<\/p>\n
    Source<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
    Continuing\u00a0Zabbix series, this tutorial will guide you on how you can install and configure Zabbix agents on\u00a0Linux\u00a0(Debian based systems and\u00a0CentOS) in order to actively monitor local resources on remote systems. Add Remote Linux Host to Zabbix Server \u2013 Part 3 The main job of zabbix agents consists in gathering local information from the targets where … <\/p>\n
    Continue reading “How to Install and Configure Zabbix Agents on Remote Linux Systems \u2013 Part 3”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-11551","post","type-post","status-publish","format-standard","hentry","category-linux"],"_links":{"self":[{"href":"https:\/\/www.appservgrid.com\/paw92\/index.php\/wp-json\/wp\/v2\/posts\/11551","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appservgrid.com\/paw92\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appservgrid.com\/paw92\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appservgrid.com\/paw92\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appservgrid.com\/paw92\/index.php\/wp-json\/wp\/v2\/comments?post=11551"}],"version-history":[{"count":1,"href":"https:\/\/www.appservgrid.com\/paw92\/index.php\/wp-json\/wp\/v2\/posts\/11551\/revisions"}],"predecessor-version":[{"id":11552,"href":"https:\/\/www.appservgrid.com\/paw92\/index.php\/wp-json\/wp\/v2\/posts\/11551\/revisions\/11552"}],"wp:attachment":[{"href":"https:\/\/www.appservgrid.com\/paw92\/index.php\/wp-json\/wp\/v2\/media?parent=11551"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appservgrid.com\/paw92\/index.php\/wp-json\/wp\/v2\/categories?post=11551"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appservgrid.com\/paw92\/index.php\/wp-json\/wp\/v2\/tags?post=11551"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}