This is a small program to forward systemd failure notifications to PagerDuty.

PAGERDUTY_ROUTING_KEY is a required variable and must be set to PagerDuty Event API v2 Routing Key.
HTTP_PROXY is an optional variable and should be set to the HTTP Proxy URL.

Install systemd-failure-pagerduty to /bin or your preferred directory.

Create a systemd unit /etc/systemd/system/[email protected] for this program.

[Unit]
Description=notify systemd failure to PagerDuty
After=network.target

[Service]
Type=simple
ExecStart=/bin/systemd-failure-pagerduty %i
EnvironmentFile=/etc/default/systemd-failure-pagerduty

Write the necessary environment variables in /etc/default/systemd-failure-pagerduty.

PAGERDUTY_ROUTING_KEY=...
HTTP_PROXY=...
SUMMARY_TEMPLATE="[{{.HostName}}] systemd failed {{.UnitName}}"

Set systemd-failure-pagerduty@%n to the OnFailure hook of the service for which you want to be notified of failures.