# Run an action every 30 seconds **URL:** \ **Category:** NGINX\ **Created:** [February 8, 2011, 11:38am UTC](https://www.ruby-forum.com/t/run-an-action-every-30-seconds/202884 "2011-02-08T11:38:57Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![dubstep](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/cdc98d/32.png) [@dubstep](https://www.ruby-forum.com/u/dubstep)\ **Post date:** [February 8, 2011, 11:38am UTC](https://www.ruby-forum.com/t/run-an-action-every-30-seconds/202884/1 "2011-02-08T11:38:57Z")
Hello, I would like my Nginx server to run every 30 seconds a service job. This job will just send a message to another server that the nginx is running and OK. Does anybody know how to do it? I have just one idea - to write a module that will send the OK message to another server. Then cron will run each 1 minute (unfortunately 30 seconds is not possible) a script that will send a request to the module. Thanks in advance for your ideas, Michal Posted at Nginx Forum: > **[run an action every 30 seconds](https://forum.nginx.org/read.php?2,173142,173142#msg-173142)** > > Hello, I would like my Nginx server to run every 30 seconds a service job. This job will just send a message to another server that the nginx is running and OK. Does anybody know how to do it? I have just one idea - to write a module that will send... ---
**Author:** ![michalkraus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/aeb1de/32.png) [@michalkraus](https://www.ruby-forum.com/u/michalkraus)\ **Post date:** [February 8, 2011, 11:59am UTC](https://www.ruby-forum.com/t/run-an-action-every-30-seconds/202884/2 "2011-02-08T11:59:43Z")
how about linux crond?i think it will be much easier than moudle. 在 2011-2-8 下午6:37，“michalkraus” [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)写道： > Michal > > Posted at Nginx Forum: > [http://forum.nginx.org/read.php?2,173142,173142#msg-173142](http://forum.nginx.org/read.php?2,173142,173142#msg-173142) ---
**Author:** ![michalkraus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/aeb1de/32.png) [@michalkraus](https://www.ruby-forum.com/u/michalkraus)\ **Post date:** [February 8, 2011, 12:07pm UTC](https://www.ruby-forum.com/t/run-an-action-every-30-seconds/202884/3 "2011-02-08T12:07:54Z")
Two options: 1. Use cron if you can accept minimum 1 minute between every launch. 2. Use a a script with a sleep() instruction and verify that the script is always running. 3. Use a heartbeat solution - [http://linux-ha.org/wiki/Main\_Page](http://linux-ha.org/wiki/Main_Page) - Gregory 2011/2/8 baalchina [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ---
**Author:** ![michalkraus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/aeb1de/32.png) [@michalkraus](https://www.ruby-forum.com/u/michalkraus)\ **Post date:** [February 8, 2011, 12:08pm UTC](https://www.ruby-forum.com/t/run-an-action-every-30-seconds/202884/4 "2011-02-08T12:08:31Z")
Three options: 1. Cron if you can wait 1 minute. 2. Script always running with sleep() instruction and check that the script is always running. 3. HA/Heartbeat - [http://linux-ha.org/wiki/Main\_Page](http://linux-ha.org/wiki/Main_Page) - Gregory 2011/2/8 baalchina [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ---
**Author:** ![michalkraus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/aeb1de/32.png) [@michalkraus](https://www.ruby-forum.com/u/michalkraus)\ **Post date:** [February 8, 2011, 12:12pm UTC](https://www.ruby-forum.com/t/run-an-action-every-30-seconds/202884/5 "2011-02-08T12:12:16Z")
On 08/02/11 11:05, Gregory Agerba wrote: > Two options: > > 1. Use cron if you can accept minimum 1 minute between every launch. > 2. Use a a script with a sleep() instruction and verify that the script is > always running. > 3. Use a heartbeat solution - [http://linux-ha.org/wiki/Main\_Page](http://linux-ha.org/wiki/Main_Page) 1. Use cron to start a script which does the test, sleeps for 30s, then does the test again, then dies (to be restarted by cron at the next minute) – Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) @ 13 Clarke Rd, Milton Keynes, MK1 1LG ---
**Author:** ![michalkraus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/aeb1de/32.png) [@michalkraus](https://www.ruby-forum.com/u/michalkraus)\ **Post date:** [February 8, 2011, 12:36pm UTC](https://www.ruby-forum.com/t/run-an-action-every-30-seconds/202884/6 "2011-02-08T12:36:44Z")
Thanks for your options > 1. Use a heartbeat solution - [http://linux-ha.org/wiki/Main\_Page](http://linux-ha.org/wiki/Main_Page) I have API between the Nginx and the second (control) server. I use RPC interface. I need just send a RPC request (with status infrmation) to the control server. I think that heartbeat is too robust. > 1. Use cron to start a script which does the test, sleeps for 30s, > then does > the test again, then dies (to be restarted by cron > at the next minute) This option seems to be the best but is any possibility the nginx to do it in its own? Posted at Nginx Forum: [http://forum.nginx.org/read.php?2,173142,173166#msg-173166](http://forum.nginx.org/read.php?2,173142,173166#msg-173166) ---
**Author:** ![michalkraus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/aeb1de/32.png) [@michalkraus](https://www.ruby-forum.com/u/michalkraus)\ **Post date:** [February 8, 2011, 12:26pm UTC](https://www.ruby-forum.com/t/run-an-action-every-30-seconds/202884/7 "2011-02-08T12:26:06Z")
On 8 Fev 2011 10h37 WET, [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Hello, I would like my Nginx server to run every 30 seconds a > service job. This job will just send a message to another server > that the nginx is running and OK. Does anybody know how to do it? I > have just one idea - to write a module that will send the OK message > to another server. Then cron will run each 1 minute (unfortunately > 30 seconds is not possible) a script that will send a request to the > module. Use the [GitHub - nginxinc/nginx-wiki: ARCHIVED -- Source for the now archived NGINX Wiki section of https://www.nginx.com · GitHub](http://wiki.nginx.org/HttpEchoModule) and a cron job that checks a certain location and posts the message you wnat using curl to the other server. Just an idea — appa ---
**Author:** ![michalkraus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/aeb1de/32.png) [@michalkraus](https://www.ruby-forum.com/u/michalkraus)\ **Post date:** [February 8, 2011, 1:04pm UTC](https://www.ruby-forum.com/t/run-an-action-every-30-seconds/202884/8 "2011-02-08T13:04:26Z")
server { listen 8082; server\_name localhost; ``` location = /a-help2 { content_by_lua 'ngx.say(ngx.time())'; } location = /a-help { proxy_pass http://127.0.0.1:8082/a-help2; } location = /a { echo_location /a-help; echo_sleep 2; echo_location /a-help; } } ``` start a cron job to curl localhost:8082/a just a sample conf. require nginx-echo module( [GitHub - openresty/echo-nginx-module: An Nginx module for bringing the power of "echo", "sleep", "time" and more to Nginx's config file · GitHub](https://github.com/agentzh/echo-nginx-module) ) On Tue, Feb 8, 2011 at 7:35 PM, michalkraus [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > the test again, then dies (to be restarted by cron > > [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) > > [mailman.nginx.org archive](http://nginx.org/mailman/listinfo/nginx) – Regards, 林青(Kindy Lin)