Cannot fix "Zabbix agent on server is unreachable for 4 hours" alert on two Ubuntu servers

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    • Type: Problem report
    • Resolution: Commercial support required
    • Priority: Trivial
    • None
    • Affects Version/s: None
    • Component/s: None
    • None
    • Environment:
      Two (2) Linux 6.5.0-1024-aws #24~22.04.1-Ubuntu SMP Thu Jul 18 10:43:12 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux AWS EC2 instances

      Steps to reproduce:

      1. Changes in configuration...
        1. We are receiving the "Zabbix agent on server is unreachable for 4 hours" but restarting the Zabbix agent nor reinstalling the Zabbix agent is clearing it.  (see attachment)
        2. Trying to connect to the agent from the Zabbix server returns the following:

      [damwilloughby@rxzabbix01 ~]$ zabbix_get -s demprxbuse1-01 -p 10052 -k agent.ping
      zabbix_get [2699786]: Get value error: cannot connect to [[demprxbuse1-01]:10052]: [111] Connection refused
      [damwilloughby@rxzabbix01 ~]$ zabbix_get -s demprxbuse1-01 -p 10051 -k agent.ping
      zabbix_get [2699787]: Get value error: cannot connect to [[demprxbuse1-01]:10051]: [111] Connection refused
      [damwilloughby@rxzabbix01 ~]$ zabbix_get -s demprxbuse1-01 -p 10050 -k agent.ping
      zabbix_get [2699789]: Get value error: cannot connect to [[demprxbuse1-01]:10050]: [111] Connection refused (see attachment)

        1. There is no enabled firewall on the Ubuntu servers. (see attachment)
        2. AWS security group has inbound TCP ports 10050, 10051 and 10052 open (see attachment).
        3. Attaching logs for both machines.

       

        1. DEMPRXBUSE1-01 Zabbix logs.rtf
          12 kB
          Todd Willoughby
        2. Screenshot 2024-09-11 at 1.11.13 PM.png
          34 kB
          Todd Willoughby
        3. Screenshot 2024-09-11 at 1.11.29 PM.png
          77 kB
          Todd Willoughby
        4. Screenshot 2024-09-11 at 1.15.53 PM.png
          124 kB
          Todd Willoughby
        5. drxbcomuse1-01 Zabbix logs.rtf
          12 kB
          Todd Willoughby
        6. Screenshot 2024-09-11 at 1.20.40 PM.png
          205 kB
          Todd Willoughby
        7. Screenshot 2024-09-11 at 1.20.51 PM.png
          212 kB
          Todd Willoughby

            Assignee:
            Unassigned
            Reporter:
            Todd Willoughby
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              Created:
              Updated:
              Resolved: