Code Snippets

# Create a random crontab

Within drone it is not possible to create a cronjob for a repository in a random manner. If you select 

*@weeky* or *@daily* these jobs will be all started on midnight on the specific date. If you only 

have so much computing power available (for example in a kubernetes cluster) this can create some 

serious problems. To overcome this problem, the following script creates a cronjob at a random time 

and random day (in case of a weekly crontab).

**Requirements:**

- installed and configured drone cli tool

- linux

- bash

`

#!/bin/bash

OCCURANCE=$1

REPO=$2

BRANCH=$3

CNAME=$4

if [ -z $CNAME ]; then

echo "Usage: droneCreateRandomCron.sh <occurance> <repository> <branch> <crontab name>"

echo -e "\t occurance = 1 = Daily  | 0 = Weekly"

exit 1

fi

HOUR=$(($RANDOM % 24))

if [ $1 -eq 1 ]; then

DAY='*' 

else

DAY=$(($RANDOM % 6))

fi

CRONTAB="0 0 ${HOUR} * * ${DAY}"

echo "Crontab: ${CRONTAB}"

drone cron add --branch $BRANCH $REPO $CNAME "${CRONTAB}"

`