fix(Makefile): add install target

.editorconfig

@@ -0,0 +1,15 @@
+# EditorConfig is awesome: https://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = false
+
+[Makefile]
+indent_style = tab

Makefile

@@ -1,3 +1,7 @@
+DESTDIR?=
+PREFIX?=/usr/local
+EXECUTABLE?=fail2ban_exporter
+
 # List make commands
 .PHONY: ls
 ls:
@@ -47,10 +51,21 @@ build:
 	-X main.builtBy=manual \
 	" \
 	-trimpath \
-	-o fail2ban_exporter \
+	-o ${EXECUTABLE} \
 	exporter.go
 
 # Build project docker container
 .PHONY: build/docker
 build/docker: build
-	docker build -t fail2ban-prometheus-exporter .
+	docker build -t ${EXECUTABLE} .
+
+.PHONY: install
+install: build
+	install -D --mode 0644 systemd/systemd.service ${DESTDIR}/usr/lib/systemd/system/${EXECUTABLE}.service
+
+	install -D --mode 0755 --target-directory ${DESTDIR}${PREFIX}/bin/${EXECUTABLE} ${EXECUTABLE}
+
+# NOTE: Set restrict file permissions by default to protect optional basic auth credentials
+	install -D --mode 0600 --target-directory ${DESTDIR}/etc/conf.d ${EXECUTABLE}
+
+	install -D --mode 0755 --target-directory ${DESTDIR}${PREFIX}/share/licenses/LICENSE LICENSE

prometheus-fail2ban-exporter

@@ -0,0 +1,6 @@
+# F2B_COLLECTOR_SOCKET=""
+# F2B_COLLECTOR_TEXT_PATH=""
+# F2B_WEB_LISTEN_ADDRESS=""
+# F2B_WEB_BASICAUTH_USER=""
+# F2B_WEB_BASICAUTH_PASS=""
+# F2B_EXIT_ON_SOCKET_CONN_ERROR=""

systemd/systemd.service

@@ -0,0 +1,22 @@
+[Unit]
+Description=Prometheus exporter for fail2ban metrics
+Requires=network-online.target
+After=network-online.target
+
+[Service]
+EnvironmentFile=/etc/conf.d/prometheus-fail2ban-exporter
+ExecStart=/usr/bin/prometheus-fail2ban-exporter
+ExecReload=/bin/kill -HUP $MAINPID
+Restart=on-failure
+RestartSec=5s
+
+NoNewPrivileges=true
+
+# NOTE: Would be great to create and use a dedicated user/group via
+# sysusers.conf to access the fail2ban socket, but currently it is no possible
+# without manual configuration of the fail2ban daemon.
+User=root
+Group=root
+
+[Install]
+WantedBy=multi-user.target