Add support for repeat interval and emails to alertmanager type

type/__prometheus_alertmanager/files/alertmanager.yml.sh

@@ -28,10 +28,10 @@ route:
 
   # If an alert has successfully been sent, wait 'repeat_interval' to
   # resend them.
-  repeat_interval: 3h
+  repeat_interval: ${REPEAT_INTERVAL:?}
 
   # A default receiver
-  receiver: admin-mails
+  receiver: admins
 
   # All the above attributes are inherited by all child routes and can 
   # overwritten on each.
@@ -54,8 +54,20 @@ inhibit_rules:
 
 
 receivers:
-- name: 'admin-mails'
-  email_configs:
-  - to: '${RECEIVER_EMAIL:?}'
-
+- name: 'admins'
 EOF
+
+if [ -n "$RECEIVER_EMAIL" ]; then
+	cat << EOF
+  email_configs:
+  - to: '$RECEIVER_EMAIL'
+    send_resolved: true
+EOF
+fi
+
+if [ -n "$RECEIVER_WEBHOOK" ]; then
+	cat << EOF
+  webhook_configs:
+  - url: ${RECEIVER_WEBHOOK:?}
+EOF
+fi

type/__prometheus_alertmanager/manifest

@@ -25,8 +25,22 @@ SMTP_USER=$(cat "${__object:?}/parameter/smtp-user")
 SMTP_PASSWORD=$(cat "${__object:?}/parameter/smtp-password")
 export SMTP_SMARTHOST SMTP_USER SMTP_FROM SMTP_PASSWORD
 
-RECEIVER_EMAIL=$(cat "${__object:?}/parameter/receiver")
+if [ -f "${__object:?}/parameter/receiver-email" ]; then
+	RECEIVER_EMAIL=$(cat "${__object:?}/parameter/receiver-email")
 	export RECEIVER_EMAIL
+fi
+if [ -f "${__object:?}/parameter/receiver-webhook" ]; then
+	RECEIVER_WEBHOOK=$(cat "${__object:?}/parameter/receiver-webhook")
+	export RECEIVER_WEBHOOK
+fi
+
+if [ -z "$RECEIVER_EMAIL" ] && [ -z "$RECEIVER_WEBHOOK" ]; then
+	echo "At least one receiver must be configured." >&2
+	exit 1
+fi
+
+REPEAT_INTERVAL=$(cat "${__object:?}/parameter/repeat-interval")
+export REPEAT_INTERVAL
 
 # Install Alertmanager.
 __package "$package"

type/__prometheus_alertmanager/parameter/default/repeat-interval

@@ -0,0 +1 @@
+3h

type/__prometheus_alertmanager/parameter/optional

@@ -0,0 +1,3 @@
+repeat-interval
+receiver-webhook
+receiver-email

type/__prometheus_alertmanager/parameter/required

@@ -2,4 +2,3 @@ smtp-smarthost
 smtp-from
 smtp-user
 smtp-password
-receiver