alertmanager not sending emails

[Shandude]

Hi Team

i have issues alertmanager sending emails..below is my sample configs that checks status of "cadvisor" container

prometheus.yml

rule_files:

  - "/opt/alertmanager-0.15.0-rc.1.linux-amd64/rules.yml"

/opt/alertmanager-0.15.0-rc.1.linux-amd64/rules.yml:

ALERT cadvisor_check

  IF up{instance="localhost:8080"}==0

  FOR 5s

  LABELS {

    severity="critical"

  }

  ANNOTATIONS {

  SUMMARY= "Instance {{$labels.instance}} down",

  DESCRIPTION= "Instance= {{$labels.instance}}, Service/Job ={{$labels.job}} is down for more than 5 sec."

  }

alertmanager.yml

global:

  smtp_smarthost: 'localhost:25'

  smtp_from: 'promethe...@abc.com'

templates:

- '/etc/alertmanager/template/*.tmpl'

route:

  group_by: ['job', 'alertname', 'cluster', 'service']

  group_wait: 30s

  # When the first notification was sent, wait 'group_interval' to send a batch

  # of new alerts that started firing for that group.

  group_interval: 5m

  # If an alert has successfully been sent, wait 'repeat_interval' to

  # resend them.

  repeat_interval: 3h

  # A default receiver

  receiver: my-email

  # All the above attributes are inherited by all child routes and can

  # overwritten on each.

  # The child route trees.

  routes:

  # This routes performs a regular expression match on alert labels to

  # catch alerts that are related to a list of services.

  - match:

      severity: critical

    receiver: my-email

    

inhibit_rules:

- source_match:

    severity: 'critical'

  target_match:

    severity: 'warning'

  # Apply inhibition if the alertname is the same.

  equal: ['alertname', 'cluster', 'service']

receivers:

- name: 'my-email'

  email_configs:

  - to: 'my-e...@abc.com'

    require_tls: false

====

when container goes down., i see in the alert manager logs that the alert is becoming "active" and when i start the container it going to state "resolved"

but the problem is i am not getting any emails.,when the alert becomes active

anything wrong with the configurations ? ..pls assist

[Simon Pasquier]

I would run AlertManager with --log.level=debug and dig into the logs.

Please check the logs of the mail server too.

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