I want to create a cron job to run a ruby script. this is what i have put in the crontab.
2 * * * * ruby /home/mark/project/script.rb >> /home/mark/cronOutput.txt
But its not running. I think there's some problem with the environment getting loaded up when the cron runs as root.
Please help.
If your ruby is in non standard paths then personally I like to wrap my ruby calls in a shell script, thereby ensuring that all the paths etc. my ruby program needs are set correctly, and schedule the script in crontab. Do something like
2 * * * * /home/mark/project/ruby_wrapper_sh >> /home/mark/cronOutput.txt 2>&1
and your /home/mark/project/ruby_wrapper_sh should read something like
#!/bin/bash
. ~mark/.bash_profile
`ruby /home/mark/project/script.rb`
If you are using RVM, you can simply do:
rvm cron setup
Reference:
https://coderwall.com/p/vhv8aw/getting-ruby-scripts-working-with-bundler-rvm-and-cron
Check whenever(https://github.com/javan/whenever) gem to use cron jobs in Rails
working on centos
in your terminal execute
# which ruby which is find your ruby path
example output
/usr/bin/ruby
Then you can edit your cronjob, using crontab -e
* * * * * /usr/bin/ruby /home/mark/project/script.rb
and save, this simply working on my centos server.
You can test the code first using this command before you edit your cronjob
#/usr/bin/ruby /home/mark/project/script.rb
it should be working first, then you can put on your crontab
Thanks for #saihgala for his solution, but I'm little modified this way.
I add #!/usr/bin/env ruby sting to the beginning of my ruby executable file.
Add permissions for this file, launch crontab file edit crontab -e.
Add */1 * * * 0-5 /path/to/executable.rb>>/path/to/output.txt and then it works for me.
Related
I'd like to start gem elasticsearch if it's not running in my Rails app. I don't want to use any other gems to do it.
So I created file start.sh:
if pgrep -u sth java; then
/home/sth/sth/attractions/elasticsearch-1.6.0/bin/elasticsearch
fi
and I placed it in crontab:
* * * * * /home/sth/sth/attractions/start.sh
The script is not working and I don't know why.
Cron is not the way to do this under Linux, the init system can help you here :
https://www.elastic.co/guide/en/elasticsearch/reference/current/setup-service.html
I'm trying to execute the following shell script using crontab:
#!/bin/sh
cd /mnt/voylla-production/current
bundle exec rake maintenance:last_2_days_orders
bundle exec rake maintenance:send_last_2_days_payment_dropouts
The crontab entry is
0 16 * * * /mnt/voylla-production/releases/20131031003111/voylla_scripts/cj_4pm.sh
I'm getting the following error message in the mail:
/mnt/voylla-staging/current/voylla_scripts/cj_4pm.sh: line 3: bundle: command not found
/mnt/voylla-staging/current/voylla_scripts/cj_4pm.sh: line 4: bundle: command not found
I dont get the error when I run the commands manually. Not sure what's going on here. Could someone please point out.
Thanks
A nice trick to get all environment properly set up in crontab is to use /bin/bash -l :
0 16 * * * /bin/bash -l -c '/mnt/voylla-production/releases/20131031003111/voylla_scripts/cj_4pm.sh'
The -l option will invoke a full login shell, thus reading your bashrc file and any path / rvm setting it performs.
If you want to simplify your crontab management and use this trick - as well as others - without having to think about them, you can use the Whenever gem. It also play very nice with capistrano, if you use it, regenerating crontab on deploy.
The user used by cron does not have the correct environment.
You can tell cron which user to use. For a bash script, you can so something like:
#!/bin/bash --login
source /home/user/.bashrc
rvm use 2.0.0#gemset #if you use rvm
cd /path/to/project && bundle exec xyz
We need set right path to our bundle:
#!/bin/sh
cd /mnt/voylla-production/current
/home/youruser/.rbenv/shims/bundle exec rake maintenance:last_2_days_orders
I am trying to run a RAKE file from a bash script fired by a crontab:
my crontab looks like this:
* * * * * /bin/bash ~/sites/www/tweeet/get_tweeet.sh
my bash script (get_tweeet.sh) looks like this:
1 #!/bin/bash
2 set -x
3 cd /var/www/tweeet/
4 export RAILS_ENV=development
5 rake get_tweeet >> /var/www/tweeet/test.log
6 echo "$(date): cron job run " >> /var/www/tweeet/test.log
What happens is that line 6 outputs into the test.log but line 5 does now - the rake does not run.
BUT if i call the script using the exact line from the crontab
/bin/bash /var/www/tweeet/get_tweeet.sh
then it works - i'm baffled by this!
Your direct execution of the script runs because it has your full environment available. A cronjob does not, even if it belongs to the same user. So one solution is to launch it from within a full login shell. In your crontab:
bash --login -c '/var/www/tweeet/get_tweeet.sh'
I remember seeing some post about this potentially having some subtle side effects that I don't recall, but it's been working for me.
I'm having a rough time executing script/runner with a cron and RVM. I believe the issues lie with the rvm environment not being set before the runner is executed.
currently im throwing the error
/bin/sh: 1.sql: command not found
which is more than i've gotten earlier, so i guess that's good.
I've read this thread Need to set up rvm environment prior to every cron job but im still not really getting it. Part of the problem i think is the error reporting.
this is my runner thus far.
*/1 * * * * * /bin/bash -l -c 'rvm use 1.8.7-p352#2310; cd development/app/my_app2310 && script/runner -e development "Mailer.find_customer"'
as per the above link, i tried making a rvm_cron_runner.
i created a file and placed this in it:
#!/bin/sh
source "/Users/dude/.rvm/scripts/rvm"
exec $1
then i updated my crontab to this.
*/1 * * * * * /bin/bash -l -c '/Users/dude/development/app/my_app2310/rvm_cron_runner; rvm use 1.8.7-p352#2310; cd development/app/my_app2310 && script/runner -e development "Mailer.find_customer"'
This also has made no difference. i get no error. nothing.
Can anyone see what i'm doing incorrectly?
P.S i hope my code formatting worked.
Could you try to place the code you want to run in a separate script, and then use the rvm_cron_runner ?
So place your actions in a file called /path/cron_job
rvm use 1.8.7-p352#2310
cd development/app/my_app2310 && script/runner -e development "Mailer.find_customer"
and then in your crontab write
1 2 * * * /path/rvm_cron_runner /path/cron_job
The differences:
this does not start a separate shell
use the parameter of the rvm_cron_runner
If you would use an .rvmrc file, you could even drop the rvm use ... line, I think.
You don't need to write a second cron runner (following that logic, you might as well write a third cron runner runner). Please keep things simple. All you need to do is configure your cron job to launch a bash shell, and make that bash shell load your environment.
The shebang line in your script should not refer directly to a ruby executable, but to rvm's ruby:
#!/usr/bin/env ruby
This instructs the script to load the environment and run ruby as we would on the command line with rvm loaded.
On many UNIX derived systems, crontabs can have a configuration section before the actual lines that define the jobs to be run. If this is the case, you would then specify:
SHELL=/path/to/bash
This will ensure that the cron job will be spawned from bash. Still, your environment is missing, so to instruct bash to load your environment, you will want to add to the configuration section the following:
BASH_ENV=/path/to/environment (typically .bash_profile or .bashrc)
HOME is automatically derived from the /etc/passwd line of the crontab owner, but you can override it.
HOME=/path/to/home
After this, a cron job might look like this:
15 14 1 * * $HOME/rvm_script.rb
What if your crontab doesn't support the configuration section. Well, you will have to give all the environment directives in one line, with the job itself. For example,
15 14 1 * * export BASH_ENV=/path/to/environment && /full/path/to/bash -c '/full/path/to/rvm_script.rb'
Full blog post on the subject
You can use rvm wrappers:
/home/deploy/.rvm/wrappers/ruby-2.2.4/ruby
Source: https://rvm.io/deployment/cron#direct
I'm trying to get a rails job running with CRON. All the examples I find direct me to other rails tools, plugins, gems, etc, which is good, but I really just want to use CRON, regardless. I can run my job ok with the following, but when I've tried cron I haven't had any luck (just doesn't seem to do anything). I want to run it every 3 minutes (for testing).
/usr/bin/env ruby ~/Dropbox/98_2011/webs/apps238/swapper/script/runner /home/durrantm/Dropbox/98_2011/webs/apps238/swapper/app/controllers/scheduled_emails_controller.rb
I'm on Linux Ubuntu.
My PATH has:
/var/lib/gems/1.8/bin:/home/durrantm/.rvm/gems/ruby-1.8.7-p302/bin:/home/durrantm/.rvm/gems/ruby-1.8.7-p302#global/bin:/home/durrantm/.rvm/rubies/ruby-1.8.7-p302/bin:/home/durrantm/.rvm/bin:/home/durrantm/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/pgsql/bin
Cron jobs don't load the user's environment. Try adding RAILS_ENV=production before your command within crontab, or whichever environment you need.
Example:
RAILS_ENV=production
*/3 * * * * /your/command/here
OR, if you want to make sure you have your user's full environment, execute the command within a login shell:
*/3 * * * * bash --login -c '/your/command/here'
Get rid of the home dir expansion character (replace ~ with /home/user/etc/etc) and you should be in good shape (quite likely cron's expansion of ~ doesn't match your users).
If the other parts of the syntax are bothersome there's an easy gui.
http://gnome-schedule.sourceforge.net/
sudo apt-get install gnome-schedule
You'll still have to have the path to your rb file fixed up though.
1- you might not have permissions. try running crontab -e as root
2- why don't you write to a log file to debug the issue:
*/3 * * * * /your/command/here >> /path/to/logfile