Alertmanager to slack not working

[kiran]

Please help. I am trying to setup alertmanager with prometheus and alerts to be sent to slack.

But somehow I am not receiving anything in slack.

I have verified that alerts are firing by going to http://localhost:9090/alerts and I see alerts firing. I also checked separately if slack webhook is working using the CURL command provided by slack when I signed up for webhook and I am receiving messages. I also verified if YAML files are in valid format using yamllint.com as well.

I am attaching the config files(alertmanager section of prometheus.yml, alertmanager.yml, host.rules file).

[Brian Candler]

Your alertmanager config is broken.  "receivers" needs to be a list, as does slack_configs, and the settings need to be indented. I doubt you're even able to start alertmanager with that config.

You posted images rather than text, so I can't copy-paste your config to fix it, but here's a different one showing the required formatting:

receivers:

- name: brian

  email_configs:

  - to: br...@example.com

    send_resolved: true

[kiran]

Thank you, Brian.

I started from scratch and used the alertmanager.yml from this link:

https://awesome-prometheus-alerts.grep.to/alertmanager

I see its firing but not receiving on slack. Is there any log file for alert manager to debug?

I am attaching as text file my alertmanager.yml

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[Brian Candler]

It logs to stdout/stderr.  If you're running alertmanager under systemd then try "journalctl -eu alertmanager".  Or simply stop it, and then run it in the foreground in a terminal.