How to use GCE SQL Proxy as service in Ubuntu 15.10 images

cloudsqlproxy.service

[Unit]
Description=Google Cloud Compute Engine SQL Proxy
After=cloud-config.target
Wants=cloud-config.target

[Service]
Type=simple
ExecStartPre=/bin/mkdir -p /run/cloudsqlproxy

#Optional steps if you wanna link default mysqld socket to an instance
ExecStartPre=/bin/mkdir -p /run/mysqld
ExecStartPre=/bin/ln -s /run/cloudsqlproxy/<<YOUR-PROJECT>>:<<REGION>>:<<SQL-INSTANCE>> /run/mysqld/mysqld.sock

ExecStart=/usr/bin/daemon -n cloudsqlproxy
ExecReload=/usr/bin/daemon -n cloudsqlproxy --restart
ExecStop=/usr/bin/daemon -n cloudsqlproxy --stop

[Install]
WantedBy=multi-user.target

daemon.conf

# /etc/daemon.conf: system-wide daemon(1) configuration.
# See daemon(1) for full documentation.

# Format: <name|"*"> <option(","option)*>

cloudsqlproxy  output=local0.debug,respawn,command=cloudsqlproxy -fuse -dir=/run/cloudsqlproxy

install-tools.sh

#!/bin/bash
wget -O /usr/local/bin/cloudsqlproxy https://dl.google.com/cloudsql/cloud_sql_proxy.linux.amd64
apt-get install daemon