Best solution for dynamically updating upstream by watching consul service

huabin.zheng · 2016-11-30T14:56:30+00:00

Ahh yes, that would definitely make sense. I'll look into this further. Thanks very much for your reply!On 4 December 2016 at 01:04, DeJiang Zhu &lt...

Best solution for dynamically updating upstream by watching consul service

huabin.zheng

Hi,

I have upstream servers register their host:port in consul with service name, e.g. foo. The registries changes will be notified if I watch on the consul agent, by calling http://consul_agent_addr/foo. So I am looking for a solution that watches consul by sending http request to consul agent and blocks until some registry changed, then replaces upstream backends with latest registries.

lua-resty-http and lua-upstream-nginx-module are nearly the solution but I am not clear about:

1) where is the right place to send http request, in infinitely loop. As i have to always watch consul to receive registry changed event

2) it seems that lua-upstream-nginx-module upstream module has no ‘replace' api

moonbingbing

you can look into this project: https://github.com/upyun/slardar

2016-11-30 14:56 GMT+08:00 Huabin Zheng <huabi...@gmail.com>:

Hi,

I have upstream servers register their host:port in consul with service name, e.g. foo. The registries changes will be notified if I watch on the consul agent, by calling http://consul_agent_addr/foo. So I am looking for a solution that watches consul by sending http request to consul agent and blocks until some registry changed, then replaces upstream backends with latest registries.

lua-resty-http and lua-upstream-nginx-module are nearly the solution but I am not clear about:
1) where is the right place to send http request, in infinitely loop. As i have to always watch consul to receive registry changed event
2) it seems that lua-upstream-nginx-module upstream module has no ‘replace' api

.

huabin.zheng

Thanks.

I will try loop in init_worker_by_lua_file.

On Wednesday, November 30, 2016 at 6:30:25 PM UTC+8, WenMing wrote:

you can look into this project: https://github.com/upyun/slardar

2016-11-30 14:56 GMT+08:00 Huabin Zheng <huabin...@gmail.com>:
Hi,

I have upstream servers register their host:port in consul with service name, e.g. foo. The registries changes will be notified if I watch on the consul agent, by calling http://consul_agent_addr/foo. So I am looking for a solution that watches consul by sending http request to consul agent and blocks until some registry changed, then replaces upstream backends with latest registries.

lua-resty-http and lua-upstream-nginx-module are nearly the solution but I am not clear about:
1) where is the right place to send http request, in infinitely loop. As i have to always watch consul to receive registry changed event
2) it seems that lua-upstream-nginx-module upstream module has no ‘replace' api

.

anand.nadar

Does slardar support dynamic configuration of nginx upstreams? Its seems updating, deleting servers are to be managed via its REST endpoints. Please let me know if there is a way to do this.

On Wednesday, 30 November 2016 05:30:25 UTC-5, WenMing wrote:

you can look into this project: https://github.com/upyun/slardar

2016-11-30 14:56 GMT+08:00 Huabin Zheng <huabin...@gmail.com>:
Hi,

I have upstream servers register their host:port in consul with service name, e.g. foo. The registries changes will be notified if I watch on the consul agent, by calling http://consul_agent_addr/foo. So I am looking for a solution that watches consul by sending http request to consul agent and blocks until some registry changed, then replaces upstream backends with latest registries.

lua-resty-http and lua-upstream-nginx-module are nearly the solution but I am not clear about:
1) where is the right place to send http request, in infinitely loop. As i have to always watch consul to receive registry changed event
2) it seems that lua-upstream-nginx-module upstream module has no ‘replace' api

.