My goal is to trigger a report every first weekday of the month at 7AM (7/1/15,8/3/15,9/1/15, etc.)
I am using the following cron expression: H 7 1-3/3 * 1-5
It runs on July 1, but it is not scheduled next to run on August 3, but on September 1. How can I get it to run on the first weekday of every month?
I am using the following help guide:
MINUTE Minutes within the hour (0–59)
HOUR The hour of the day (0–23)
DOM The day of the month (1–31)
MONTH The month (1–12)
DOW The day of the week (0–7) where 0 and 7 are Sunday.
To specify multiple values for one field, the following operators are available. In the order of precedence,
The * specifies all valid values
M-N specifies a range of values
M-N/X or */X steps by intervals of X through the specified range or whole valid range
A,B,...,Z enumerates multiple values
To allow periodically scheduled tasks to produce even load on the system, the symbol H (for “hash”) should be used wherever possible.
First weekday of the month rules:
If today is a Monday, then the job should be run if today is also the 1st, 2nd, or 3rd of the month
If today is a Tuesday, Wednesday, Thursday, or Friday, then the job should be run if today is also the 1st of the month
The following cron expressions should do the job:
H 7 1-3 * 1
H 7 1 * 2
H 7 1 * 3
H 7 1 * 4
H 7 1 * 5
# Would last have run at Wednesday, July 1, 2015 7:00:02 AM EEST; would next run at Monday, August 3, 2015 7:00:02 AM EEST.
Beware, because of this article, you can't just use:
H 7 1-3 * 1
H 7 1 * 2-5
The above doesn't work! Instead, the job is run on every weekday, twice on the 1st of the month, and maybe twice on the 2nd and 3rd of the month!
But I was not able to reproduce it.
This should work just fine:
H 7 1-3 * 1
H 7 1 * 2-5
The article to which the accepted answer is referred to is about crontab expressions. Jenkins cron expressions actually use AND for DOM and DOW (otherwise the solution from the accepted answer wouldn't work either)
Here is the answer to your question, seems it can work
http://www.switchplane.com/blog/how-to-run-a-cron-job-on-the-first-weekday-of-the-month/
All the best
I want to schedule a job in a far future. I seen tools like delayed_job can do some tasks asynchronously but it seems to be used for tasks scheduled in 5 minutes. Another solution can be to do a cron but it's not very efficient.
Is there a better way? I want to be sure than, if I reboot the server, tasks scheduled are not deleted.
You can use the rufus-scheduler. The example taken from the documentation shows how to do it:
require 'rufus-scheduler'
scheduler = Rufus::Scheduler.new
scheduler.at '2030/12/12 23:30:00' do
# do something at a given point in time
end
It also allows you to schedule in diferent ways:
scheduler.in '10d' do
# do something in 10 days
end
scheduler.every '3h' do
# do something every 3 hours
end
scheduler.cron '5 0 * * *' do
# do something every day, five minutes after midnight
# (see "man 5 crontab" in your terminal)
end
take a look at whenever gem
Seems like using
every '0 0 23 12 *' do
...
end
would work for this. It can take cron syntax so minute hour day month day-of-week. So this will run every December 23rd at 12:00am regardless of what day of the week that is.
We are using whenever gem on our rails project and there is one task that need to be run every hour but only on the day of the sunday.
I understand that i can schedule tasks on hourly basis , by something like this:
every 1.hour do
# do something
end
and i also understand that i can schedule it for a particular time on sunday:
every :sunday, :at => "11:00pm" do
#do something
end
what i am looking for is some syntax to schedule this task for every hour on sunday.
You could do something like that
every '0 * * * 7' do
#...
end
The '0 * * * 7' part is cron syntax:
0 - minutes
first asterisk - every hour
second asterisk - every day
third asterisk - every month
7 - on sundays (7th day of the week)
EDIT - For more detailed information regarding cron tasks syntax, a very clear article can be found here: http://www.thesitewizard.com/general/set-cron-job.shtml
I've set up a Jenkins job and set the poll interval at 1 minute (I used this syntax 0 * * * *).
Looking in the Polling log I can see its reported that a poll call was made as soon as I saved the changes to the job.
But not over 10 minutes later it hasn't made any other polls.
Any suggestions how I can proceed determining the problem?
You're looking for "* * * * *".
Jenkins gives a warning since every minute can be a bit excessive, but your version control server shouldn't have any problems handling the load.
Your cron syntax is set to poll once per hour, at zero minutes past the hour. From the Jenkins help text:
This field follows the syntax of cron (with minor differences). Specifically, each line consists of 5 fields separated by TAB or whitespace:
MINUTE HOUR DOM MONTH DOW
MINUTE Minutes within the hour (0-59)
HOUR The hour of the day (0-23)
DOM The day of the month (1-31)
MONTH The month (1-12)
DOW The day of the week (0-7) where 0 and 7 are Sunday.
I added a new job in Jenkins, which I want to schedule periodically.
From Configure job, I am checking the "Build Periodically" checkbox and in the Schedule text field added the expression:
15 13 * * *
But it does not run at the scheduled time.
Is it the correct procedure to schedule a job?
The job should run at 4:20 AM, but it is not running.
By setting the schedule period to 15 13 * * * you tell Jenkins to schedule the build every day of every month of every year at the 15th minute of the 13th hour of the day.
Jenkins used a cron expression, and the different fields are:
MINUTES Minutes in one hour (0-59)
HOURS Hours in one day (0-23)
DAYMONTH Day in a month (1-31)
MONTH Month in a year (1-12)
DAYWEEK Day of the week (0-7) where 0 and 7 are sunday
If you want to schedule your build every 5 minutes, this will do the job : */5 * * * *
If you want to schedule your build every day at 8h00, this will do the job : 0 8 * * *
For the past few versions (2014), Jenkins have a new parameter, H (extract from the Jenkins code documentation):
To allow periodically scheduled tasks to produce even load on the system, the symbol H (for “hash”) should be used wherever possible.
For example, using 0 0 * * * for a dozen daily jobs will cause a large spike at midnight. In contrast, using H H * * * would still execute each job once a day, but not all at the same time, better using limited resources.
Note also that:
The H symbol can be thought of as a random value over a range, but it actually is a hash of the job name, not a random function, so that the value remains stable for any given project.
More example of using 'H'
The format is as follows:
MINUTE (0-59), HOUR (0-23), DAY (1-31), MONTH (1-12), DAY OF THE WEEK (0-6)
The letter H, representing the word Hash can be inserted instead of any of the values. It will calculate the parameter based on the hash code of you project name.
This is so that if you are building several projects on your build machine at the same time, let’s say midnight each day, they do not all start their build execution at the same time. Each project starts its execution at a different minute depending on its hash code.
You can also specify the value to be between numbers, i.e. H(0,30) will return the hash code of the project where the possible hashes are 0-30.
Examples:
Start build daily at 08:30 in the morning, Monday - Friday: 30 08 * * 1-5
Weekday daily build twice a day, at lunchtime 12:00 and midnight 00:00, Sunday to Thursday: 00 0,12 * * 0-4
Start build daily in the late afternoon between 4:00 p.m. - 4:59 p.m. or 16:00 -16:59 depending on the projects hash: H 16 * * 1-5
Start build at midnight: #midnight or start build at midnight, every Saturday: 59 23 * * 6
Every first of every month between 2:00 a.m. - 02:30 a.m.: H(0,30) 02 01 * *
Jenkins lets you set up multiple times, separated by line breaks.
If you need it to build daily at 7 am, along with every Sunday at 4 pm, the below works well.
H 7 * * *
H 16 * * 0
*/5 * * * * means every 5 minutes
5 * * * * means the 5th minute of every hour
The steps for scheduling jobs in Jenkins:
click on "Configure" of the job requirement
scroll down to "Build Triggers" - subtitle
Click on the checkBox of Build periodically
Add time schedule in the Schedule field, for example: #midnight
Note: under the schedule field, can see the last and the next date-time run.
Jenkins also supports predefined aliases to schedule build:
#hourly, #daily, #weekly, #monthly, #midnight
#hourly --> Build every hour at the beginning of the hour --> 0 * * * *
#daily, #midnight --> Build every day at midnight --> 0 0 * * *
#weekly --> Build every week at midnight on Sunday morning --> 0 0 * * 0
#monthly --> Build every month at midnight of the first day of the month --> 0 0 1 * *
Another example, How to run only on a specific day of the week:
# Every Sunday at 19:00
0 19 * * 0
The number at the end is the day of the week according to the following list:
0 = Sunday
1 = Monday
2 = Tuesday
3 = Wednesday
4 = Thursday
5 = Friday
6 = Saturday
If you are interested in how many days a week you can add a comma like this:
# Monday, Wednesday and Friday:
0 19 * * 1,3,5
Jenkins Job Scheduling Syntax
First, let’s look at the Jenkins job scheduling configuration. It looks a lot like Linux’s cron syntax, but you don’t have to be familiar with command line Linux to figure it out.
A scheduling entry consists of five whitespace-separated fields. You can schedule a job for more than one time by adding more than one entry.
Screenshot
Each field can contain an exact value or use a set of special expressions:
The familiar asterisk * indicates all valid values. So, a job that runs every day has a * in the third field.
A dash separates ranges of values. For example, a job that runs every hour from 9:00 a.m. to 5:00 p.m. would have 9-17 in the second field.
Intervals are specified with a slash /. A job that runs every 15 minutes has H/15 in the first field. Note that the H in the first field has a special meaning. If you wanted a job to run every 15 minutes, you could configure it as 0/15, which would make it run at the start of every hour. However, if you configure too many jobs this way, you can overload your Jenkins controller. Ultimately, the H tells Jenkins to pick a minute based on a hash of the job name.
Finally, you can specify multiple values with a comma. So, a job that runs Monday, Wednesday, and Friday would have 1,3,5 in the fifth field.
Jenkins provides a few examples in their help section for scheduling.
Every fifteen minutes (perhaps at :07, :22, :37, :52):
H/15 * * * *
Every ten minutes in the first half of every hour (three times,
perhaps at :04, :14, :24):
H(0-29)/10 * * * *
Once every two hours at 45 minutes past the hour starting at 9:45 AM
and finishing at 3:45 PM every weekday:
45 9-16/2 * * 1-5
Once in every two hour slot between 8 AM and 4 PM every weekday
(perhaps at 9:38 AM, 11:38 AM, 1:38 PM, 3:38 PM):
H H(8-15)/2 * * 1-5
Once a day on the 1st and 15th of every month except December:
H H 1,15 1-11 *
Jenkins also has a set of aliases that makes using common intervals easier.
Screenshot of table
To schedule a cron job every 5 minutes, you need to define the cron settings like this:
*/5 * * * *
Try this.
20 4 * * *
Check the below Screenshot
Referred URL - https://www.lenar.io/jenkins-schedule-build-periodically/
Try using 0 8 * * *. It should work
Jenkins uses Cron format on scheduling.
You can refer this link for more detailhttps://en.wikipedia.org/wiki/Cron.
One more thing, Jenkins provide us a very useful preview. Please take a look on the screenshot.
I hope this help. Thanks