Custom Subject For AlertManager email notification-CodePudding

i am struggling to create a custom subject when receiving alerts from my AlertManager, i am doing it with manifest file:

apiVersion: monitoring.coreos.com/v1alpha1
kind: AlertmanagerConfig
metadata:
  name: my-name
  labels:
    alertmanagerConfig: email
    alertconfig: email-config
spec:
  route:
    groupBy:
      - node
    groupWait: 30s
    groupInterval: 5m
    repeatInterval: 12h
    receiver: 'myReceiver'
  receivers:
  - name: 'Name'
    emailConfigs:
      - to: [email protected]

i have read that i need to add headers under the emailConfigs tab, but when i do like follows:

apiVersion: monitoring.coreos.com/v1alpha1
kind: AlertmanagerConfig
metadata:
  name: my-name
  labels:
    alertmanagerConfig: email
    alertconfig: email-config
spec:
  route:
    groupBy:
      - node
    groupWait: 30s
    groupInterval: 5m
    repeatInterval: 12h
    receiver: 'myReceiver'
  receivers:
  - name: 'Name'
    emailConfigs:
      - to: [email protected]
        headers:
          - subject: "MyTestSubject"

apiVersion: monitoring.coreos.com/v1alpha1
kind: AlertmanagerConfig
metadata:
  name: my-name
  labels:
    alertmanagerConfig: email
    alertconfig: email-config
spec:
  route:
    groupBy:
      - node
    groupWait: 30s
    groupInterval: 5m
    repeatInterval: 12h
    receiver: 'myReceiver'
  receivers:
  - name: 'Name'
    emailConfigs:
      - to: [email protected]
        headers:
          subject: "MyTestSubject"

I receive following errors:

either:

com.coreos.monitoring.v1alpha1.AlertmanagerConfig.spec.receivers.emailConfigs.headers, ValidationError(AlertmanagerConfig.spec.receivers[0].emailConfigs[0].headers[0]): missing required field "key" in com.coreos.monitoring.v1alpha1.AlertmanagerConfig.spec.receivers.emailConfigs.headers, ValidationError(AlertmanagerConfig.spec.receivers[0].emailConfigs[0].headers[0]): missing required field "value" in com.coreos.monitoring.v1alpha1.AlertmanagerConfig.spec.receivers.emailConfigs.headers];

error: error validating "alert-config.yaml": error validating data: ValidationError(AlertmanagerConfig.spec.receivers[0].emailConfigs[0].headers): invalid type for com.coreos.monitoring.v1alpha1.AlertmanagerConfig.spec.receivers.emailConfigs.headers: got "map", expected "array"

am i doing something wrong or? Please can you help me, i read this in official alertmangger documentation, from there i saw the headers map i need, i have checked other solutions and everyone is doing it like headers: subject: mySubject
but for some reason to me, it doesn't work

CodePudding user response：

Hi @Blackcat from this example I found that you might need to use Catipal 'S' for the subject under headers looks like we need to use first letter capital for the keys under headers like mentioned below.

apiVersion: monitoring.coreos.com/v1alpha1
kind: AlertmanagerConfig
metadata:
  name: my-name
  labels:
    alertmanagerConfig: email
    alertconfig: email-config
spec:
  route:
    groupBy:
      - node
    groupWait: 30s
    groupInterval: 5m
    repeatInterval: 12h
    receiver: 'myReceiver'
  receivers:
  - name: 'Name'
    emailConfigs:
      - to: [email protected]
        headers:
          Subject: "MyTestSubject"
          From: Me
          To: You

For more detailed information check this link

CodePudding user response：

I managed to get it working:

    emailConfigs:
      - to: myreceiver@mail
        headers:
          - key: subject
            value: "Custom subject goes here"

cheers :)