route:
receiver: send_email
routes:
- receiver: send_email2
That route will only ever send to send_mail2. Why?
"routes" are child routes of this route. When processing a given routing
rule, alertmanager scans through all the child routes in turn, and the
first one which matches is used. Only if *none* of them match, does it fall
back to using the "receiver" at the top level of the routing rule.
In your case, there is one child rule, and it always matches (because it
has no conditions). It sends the mail to send_email2, and then terminates.
Nothing more happens, and the fallback "receiver" is never used.
If you want to send to both, then you would have two child routes:
route:
receiver: dontcare # you can omit this line entirely (it's never used)
routes:
- receiver: send_email
continue: true
- receiver: send_email2
"continue: true" is required so that after matching the first route, it
continues to the next one instead of giving up immediately.
You can write this in a more compact one-line form where [ ... ] is a list
and { ... } is an object:
route:
routes: [ { receiver: send_email, continue: true}, { receiver:
send_email2 } ]
...and that's what I showed before.
But if all your alerts need to go to both E-mail addresses, it would be
simpler to have a single "send_email" receiver with two E-mail addresses.
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