Good afternoon,
Our Centreon has been installed on AlmaLinux 9.8.
Every control is working but the ones directed to the IBM i.
We are using an external plug-in (M81’s Control4i).
The control is working just fine and giving feedback when executed from the Linux VM.
But when the controls are set up on the Centreon GUI, the commands do not give any output “(Execute command fail)”.
Also, in the /var/log/centreon-engine/centengine.log file, there are messages that indicate that the connection between Centreon and the target IBM i is not done, while it works perfectly when launched from the VM.
Here are the messages :
- In the beginning (occurring 17 times on a row) :
[2026-08-28T15:14:49.453+02:00] [otl] [error] [204282] fail to force check : No agent that checks service xx of host 1 connected
- and then (occurring n times) :
[2026-08-28T15:14:55.757+02:00] [otl] [error] [204282] 0x3a61820 reverse_client fail read from xxx.xxx.xxx.xxx:4317
[2026-08-28T15:14:55.757+02:00] [otl] [error] [204282] 0x3a61820 client::OnDone(failed to connect to all addresses; last error: UNKNOWN: ipv4:xxx.xxx.xxx.xxx:4317: Failed to connect to remote host: Connection refused)
Why is it working on the VM but not on the GUI ?
Could you please help me understand what is not working ?
Thank you in advance !
