supervisor 配置文件，指定consul-template 配置文件路径：
[program:consul_template]
command=/md0/consul_template/consul-template -config /md0/consul_template/config.json
directory=/md0/consul_template/
user=root
autorestart = true
redirect_stderr = true
stdout_logfile = /var/log/consul_template.log
stderr_logfile = /var/log/consul_template_error.log
consul-template 版本：
./consul-template -v
consul-template v0.19.4 (68b1da2)
cat config.json 指定模板为consul界面内容，指定目标文件为/md0/prometheus-2.2.1.linux-amd64/prometheus.yml, 并指定代理服务器地址
consul {
address = "127.0.0.1:8500"
ssl {
enabled = false
verify = false
}
}
pid_file = "/var/run/consul-template.pid"
log_level = "DEBUG"
template {
source = "./prometheus.ctmpl"
destination = "/md0/prometheus-2.2.1.linux-amd64/prometheus.yml"
command = "curl -X POST http://localhost:9090/-/reload"
}
关联 consul kv 界面内容：
{{key "prometheus"}}
