Ignore errors in systemd

closes #1022

scripts/post-install.sh

@@ -12,7 +12,7 @@ function install_init {
 
 function install_systemd {
     cp -f $SCRIPT_DIR/telegraf.service /lib/systemd/system/telegraf.service
-    systemctl enable telegraf
+    systemctl enable telegraf || true
     systemctl daemon-reload || true
 }
 
@@ -53,29 +53,29 @@ if [[ -f /etc/redhat-release ]]; then
     # RHEL-variant logic
     which systemctl &>/dev/null
     if [[ $? -eq 0 ]]; then
-	install_systemd
+	    install_systemd
     else
-	# Assuming sysv
-	install_init
-	install_chkconfig
+	    # Assuming sysv
+	    install_init
+	    install_chkconfig
     fi
 elif [[ -f /etc/debian_version ]]; then
     # Debian/Ubuntu logic
     which systemctl &>/dev/null
     if [[ $? -eq 0 ]]; then
-	install_systemd
-	systemctl restart telegraf
+	    install_systemd
+	    systemctl restart telegraf || echo "WARNING: systemd not running."
     else
-	# Assuming sysv
-	install_init
-	install_update_rcd
-	invoke-rc.d telegraf restart
+	    # Assuming sysv
+	    install_init
+	    install_update_rcd
+	    invoke-rc.d telegraf restart
     fi
 elif [[ -f /etc/os-release ]]; then
     source /etc/os-release
     if [[ $ID = "amzn" ]]; then
-	# Amazon Linux logic
-	install_init
-	install_chkconfig
+	    # Amazon Linux logic
+	    install_init
+	    install_chkconfig
     fi
 fi