I am having an error while checking the alert manager status

[chinelo Ufondu]

× alertmanager.service - AlertManager
     Loaded: loaded (/lib/systemd/system/alertmanager.service; enabled; vendor preset: enabled)
     Active: failed (Result: exit-code) since Wed 2024-08-28 15:43:10 UTC; 2s ago
    Process: 1691244 ExecStart=/usr/bin/alertmanager --config.file /etc/alertmanager/alertmanager.yml (code=exited, status=1/FAIL>
   Main PID: 1691244 (code=exited, status=1/FAILURE)
        CPU: 29ms

Aug 28 15:43:10 localhost systemd[1]: Started AlertManager.
Aug 28 15:43:10 localhost alertmanager[1691244]: ts=2024-08-28T15:43:10.392Z caller=main.go:181 level=info msg="Starting Alertman>
Aug 28 15:43:10 localhost alertmanager[1691244]: ts=2024-08-28T15:43:10.392Z caller=main.go:182 level=info build_context="(go=go1>
Aug 28 15:43:10 localhost alertmanager[1691244]: ts=2024-08-28T15:43:10.392Z caller=main.go:193 level=error msg="Unable to create>
Aug 28 15:43:10 localhost systemd[1]: alertmanager.service: Main process exited, code=exited, status=1/FAILURE
Aug 28 15:43:10 localhost systemd[1]: alertmanager.service: Failed with result 'exit-code'.
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[Brian Candler]

The important error message has been truncated ("Unable to create..."). You can use left/right arrows to scroll sideways, but it would be better to use these commands:

systemctl status alertmanager -l --no-pager

journalctl -u alertmanager -n100 --no-pager

[chinelo Ufondu]

I just had to uninstall alert manager, its stressing me out
Please i need a good guide on installing alertmanager, i want to start afresh
The guide i have seen so far is just complicating

[Brian Candler]

You're not taking a very helpful approach to debugging. If you had shown the full error message, as I suggested, then your issue could probably have been fixed.

You didn't say what guide you're following. The official documentation is IMO clear and detailed:

https://prometheus.io/docs/alerting/latest/overview/

https://github.com/prometheus/alertmanager

As for installation, it's just a binary that you download and run, but the above documents don't tell you how to configure systemd to run it (ultimately it's assumed that you know how to administer a Linux system).

You can find some step-by-step instructions here, which may or may not help:

https://nsrc.org/workshops/2022/rwnog/nmm/netmgmt/en/prometheus/ex-alertmanager.html

[Ben Kochie]

Try https://prometheus-community.github.io/ansible/branch/main/

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[Chinelo Ufondu]

I have been able to resolve the issue, the problem was my config file, it wasn't properly indented and it had some syntax errors

I tried running alertmanager again and i came across another issue, here is the error

ts=2024-09-01T17:35:52.421Z caller=main.go:181 level=info msg="Starting Alertmanager" version="(version=0.27.0, branch=HEAD, revision=0aa3c2aad14cff039931923ab16b26b7481783b5)"
ts=2024-09-01T17:35:52.421Z caller=main.go:182 level=info build_context="(go=go1.21.7, platform=linux/amd64, user=root@22cd11f671e9, date=20240228-11:51:20, tags=netgo)"
ts=2024-09-01T17:35:52.440Z caller=cluster.go:186 level=info component=cluster msg="setting advertise address explicitly" addr=192.168.101.2 port=9094
ts=2024-09-01T17:35:52.441Z caller=main.go:221 level=error msg="unable to initialize gossip mesh" err="create memberlist: Could not set up network transport: failed to obtain an address: Failed to start TCP listener on \"0.0.0.0\" port 9094: listen tcp 0.0.0.0:9094: bind: address already in use"

I have tried all i can to stop the processes that is currently running  on alert manager, but it didn't work out, i also tried adding an external command to run alertmanager --web.listen-address=localhost:9095 --config.file=alertmanager.yml, but it still isn't picking the new port number i would appreciate further assistance from you guys please, Thank you.

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[Brian Candler]

Show your config file?