Send a dummy alert to Alertmanager. Based on https://gist.github.com/cherti/61ec48deaaab7d288c9fcf17e700853a by @cherti

dummyalert.sh

#!/usr/bin/env bash

name=fooAlert-$RANDOM
url='http://localhost:9093/api/v1/alerts'
bold=$(tput bold)
normal=$(tput sgr0)

generate_post_data() {
  cat <<EOF
[{
  "status": "$1",
  "labels": {
    "alertname": "${name}",
    "service": "my-service",
    "severity":"warning",
    "instance": "${name}.example.net",
    "namespace": "foo-bar",
    "label_costcentre": "FOO"
  },
  "annotations": {
    "summary": "High latency is high!"
  },
  "generatorURL": "http://local-example-alert/$name"
  $2
  $3
}]
EOF
}

echo "${bold}Firing alert ${name} ${normal}"
printf -v startsAt ',"startsAt" : "%s"' $(date --rfc-3339=seconds | sed 's/ /T/')
POSTDATA=$(generate_post_data 'firing' "${startsAt}")
curl $url --data "$POSTDATA" --trace-ascii /dev/stdout
echo -e "\n"

echo "${bold}Press enter to resolve alert ${name} ${normal}"
read

echo "${bold}Sending resolved ${normal}"
printf -v endsAt ',"endsAt" : "%s"' $(date --rfc-3339=seconds | sed 's/ /T/')
POSTDATA=$(generate_post_data 'firing' "${startsAt}" "${endsAt}")
curl $url --data "$POSTDATA" --trace-ascii /dev/stdout
echo -e "\n"

My five cents https://github.com/alexanderfefelov/docker-backpack/blob/master/prometheus/alertmanager/utils/emit-alerts.sh

very useful - thank you!

extremely useful, thanks!