Graph definition
{
"nodes": {
"ping": {
"id": "ping",
"check": {
"id": "f2-ping",
"name": "",
"type": "icmp",
"target": "localhost",
"interval": 0,
"enabled": false,
"public": false
}
},
"smtp": {
"id": "smtp",
"check": {
"id": "f2-smtp",
"name": "",
"type": "tcp",
"target": "localhost:587",
"interval": 0,
"enabled": false,
"public": false
}
}
},
"edges": [
{
"from": "smtp",
"when": "DOWN",
"to": "ping"
},
{
"from": "ping",
"when": "UP",
"alert": "SMTP DOWN, server UP — restart Exim/Postfix; check mail queue"
},
{
"from": "ping",
"when": "DOWN",
"alert": "Server OFFLINE — mail outage is a host/network issue"
}
]
}