Finished backup-to-swappable draft

roles/independent_systemd-email/README.md

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+# server_native-systemd-mail
+
+# see
+- https://wiki.archlinux.org/index.php/Systemd/Timers#MAILTO
+- https://serverfault.com/questions/876233/how-to-send-an-email-if-a-systemd-service-is-restarted/876254
+- https://serverfault.com/questions/694818/get-notification-when-systemd-monitored-service-enters-failed-state

roles/independent_systemd-email/handlers/main.yml

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+- name: "restart systemd-email service"
+  systemd:
+    name: systemd-email.service
+    daemon_reload: yes

roles/independent_systemd-email/tasks/main.yml

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+- name: install smtp-forwarder
+  pacman: name=smtp-forwarder state=present
+
+- name: configure msmtprc.conf.j2
+  template: src=msmtprc.conf.j2 dest=/root/.msmtprc
+
+- name: "create {{systemd_email_folder}}"
+  file:
+    path: "{{systemd_email_folder}}"
+    state: directory
+    mode: 0755
+
+- name: configure systemd-email.sh
+  template: src=systemd-email.sh.j2 dest={{systemd_email_folder}}systemd-email.sh
+
+- name: configure systemd-email.service
+  template: src=systemd-email@.service.j2 dest=/etc/systemd/system/systemd-email@.service
+  notify: restart systemd-email service

roles/independent_systemd-email/templates/msmtprc.conf.j2

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+# Set default values for all following accounts.
+defaults
+auth           on
+tls            on
+tls_trust_file /etc/ssl/certs/ca-certificates.crt
+logfile        ~/.msmtp.log
+
+account        system_email
+host           {{system_email_host}}
+port           {{system_email_port}}
+from           {{system_email}}
+user           {{system_email_username}}
+password       {{system_email_password}}
+
+account default : system_email

roles/independent_systemd-email/templates/systemd-email.sh.j2

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+#!/bin/bash
+
+/usr/bin/sendmail -t <<ERRMAIL
+To: {{administrator_email}}
+From: systemd <{{system_email}}>
+Subject: $1
+Content-Transfer-Encoding: 8bit
+Content-Type: text/plain; charset=UTF-8
+
+$(systemctl status --full "$1")
+ERRMAIL

roles/independent_systemd-email/templates/systemd-email@.service.j2

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+[Unit]
+Description=status email for %i to user
+
+[Service]
+Type=oneshot
+ExecStart=/bin/bash {{systemd_email_folder}}systemd-email.sh %i
+User=root
+Group=systemd-journal

roles/independent_systemd-email/vars/main.yml

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+systemd_email_folder: "{{path_administrator_scripts}}systemd_email/"