I have an AWS EC2 instance and in this instance, I have some cron jobs.
This cron jobs looks like:
0 5 * * mon curl -Ssi -X POST http://example.com
And I have some manual outputs like:
echo "output: hello..."
I want to store these actions on a log file in EC2 ubuntu or linux instance. Is it possible? Any suggestion?
Expected output:
[2021-10-10 ...] - POST http://example.com
[2021-10-11 ...] - output: hello...
Write the following script ~/bin/site-detector
#!/bin/bash
source ~/.bash_profile
log_file=/tmp/site-detector.log
curl -Ssi -X POST http://example.com >> $log_file
echo "Detected # $(date)" >> $log_file
echo " " >> $log_file
Make your script executable:
chmod a+x ~/bin/site-detector
Update your crontab script:
0 5 * * mon ~/bin/site-detector
Related
I want to create a code with chef which it test the size of log file if it exceeds 30mb for example it will delete it in cron job.
Can you help me in it please?
this is my solution but it's not what i want:
execute "echo '/srv/#{app['shortname']}/current/app/log/*.log {
rotate 1
missingok
copytruncate
sharedscripts
postrotate
/bin/rm -rf /srv/#{app['shortname']}/current/app/log/*.log*
endscript
}' >> /etc/logrotate.d/#{app['name']}-app-log-rotation" do
ignore_failure true
end
You can always create a file with the shell script to delete the file and call that file via chef cron resource
file '/tmp/foo.sh' do
content "if (wc -c < /tmp/y.txt) > 3072000; then rm -f /tmp/y.txt; fi"
mode 755
end
cron 'name_of_cron_entry' do
minute '3'
command 'sh -x /tmp/foo.sh > /tmp/backup 2>&1'
end
This will create a cron entry for you with that script.
You can try something like
file '/tmp/y.txt' do
only_if { ::File.size('/tmp/y.txt').to_f / 1024000 > 30 }
action :delete
end
Not an expert on AWS and trying to fool around with Cron jobs. For testing, I had a sample script send me emails every minute. Now, I want to change it to once every 10 minutes (*/10 * * * *) These are the container commands I tried and none of them seems to work.
I am using a config file and a txt file to define the crons.
Config file contents (with various ideas I read from online sources)
container_commands:
00_remove_old_cron_jobs0:
command: "rm -fr /etc/cron.d/cron_job"
01_remove_old_cron_jobs1:
command: "sudo sed -i 's/empty stuff//g' /etc/cron.d/cron_job"
02_remove_old_cron_jobs2:
command: "crontab -r || exit 0"
03_cron_job:
command: "cat .ebextensions/cron_job.txt > /etc/cron.d/cron_job && chmod 644 /etc/cron.d/cron_job"
leader_only: true
cron_job.txt file contents.
# The newline at the end of this file is extremely important. Cron won't run without it.
0 * * * * ec2-user /usr/bin/php -q /var/www/html/cron1.php > /dev/null
0 * * * * ec2-user /usr/bin/php -q /var/www/html/html/cron2.php > /dev/null
*/10 * * * * ec2-user /usr/bin/php -q /var/www/html/cronTestEmailer.php > /dev/null
The test emailer script keeps firing every minute instead of every 10 mins and I dont know how I can make sure cron updates are reflected correctly.
You can achieve the same with the follow ebextensions config file.
files:
"/etc/cron.d/mycron":
mode: "000644"
owner: root
group: root
content: |
* * * * * root /usr/local/bin/myscript.sh
"/usr/local/bin/myscript.sh":
mode: "000755"
owner: root
group: root
content: |
#!/bin/bash
date > /tmp/date
# Your actual script content
exit 0
commands:
remove_old_cron:
command: "rm -f /etc/cron.d/*.bak"
More Details about the config file below:
files: Creates a Cron job and a file with the name myscript.sh. If a file with the same name exists already, first it moves the old file .bak and creates the file with new contents.
commands: deletes the all .bak files
Relatively new to running cron jobs in Centos6, I can't seem to get this Python script to execute properly. I would like this script to execute and then email me the output. I have been receiving emails, but they're empty.
So far, in Crontab I've tried entering:
*/10 * * * * cd /home/local/MYCOMPANY/purrone/MyPythonScripts_Dev1 && /usr/bin/python ParserScript_CampusInsiders.py > /var/log/cron`date +\%Y-\%m-\%d-\%H:\%M:\%S`-cron.log 2>&1 ; mailx -s "Feedparser Output" my#email.com
and
*/10 * * * * /home/local/MYCOMPANY/purrone/MyPythonScripts_Dev1/ParserScript_CampusInsiders.py > /var/log/cron`date +\%Y-\%m-\%d-\%H:\%M:\%S`-cron.log 2>&1 ; mailx -s "Feedparser Output" my#email.com
I have run chmod +x on the python script to make the script executable and the Python script has #!/usr/bin/env python at the header. What am I doing wrong here?
The other problem might be that I shouldn't be using the log file? All I see at /var/log/cron when I open with cat cron is entires like this, for example (no actual output from the script):
Jul 23 13:20:01 ent-mocdvsmg01 CROND[24681]: (root) CMD (/usr/lib64/sa/sa1 1 1)
Jul 23 13:20:01 ent-mocdvsmg01 CROND[24684]: (MYJOB\purrone) CMD (/home/local/MYCOMPANY/purrone/MyPythonScripts_Dev1/ParserScript_CampusInsiders.py > /var/log/cron`date +\%Y-\%m-\%d-\%H:\%M:\%S`-cron.log 2>&1 ; mailx -s "Feedparser Output" my#email.com)
There is nothing going into your mailx input; it expects the message on stdin. Try running it outside of crontab as a test until it sends a valid email. You could test with:
% echo hello |mailx -s test my#email.com
Note that cron can email you the output of its run. You just need to add a line to the top of crontab like:
MAILTO = you#email.com
Solution was to omit the redirect > and instead edit the Crontab thusly:
*/15 * * * * /home/local/COMPANY/malvin/SilverChalice_CampusInsiders/SilverChalice_Parser.py | tee /home/local/COMPANY/malvin/SilverChalice_CampusInsiders`date +\%Y-\%m-\%d-\%H:\%M:\%S`-cron.log | mailx -s "SilverChalice CampusInsiders" my#email.com
Running:
knife bootstrap ec2-54-221-16-158.compute-1.amazonaws.com --sudo -x chef -P chef -N server --run-list 'role[inicial]'
My recipes/default.rb:
script "teste de script" do
interpreter "bash"
cwd "/home/ubuntu"
code <<-EOH
as-create-launch-config LcTiagoN --image-id ami-0521316c --instance-type t1.micro --key tiagov
EOH
end
My roles/inicial.rb:
name "inicial"
run_list "recipe[my_cookbook]"
The following error occurs below:
ShellOut::ShellCommandFailed←[
0m
------------------------------------←[
0m
Expected process to exit with [0], but
received '127'
---- Begin output of "bash" "/tmp/che
f-script20140501-8463-12uvvvl" ----
STDOUT:
STDERR: /tmp/chef-script20140501-8463-
12uvvvl: line 1: as-create-launch-config: command not found
---- End output of "bash" "/tmp/chef-
script20140501-8463-12uvvvl" ----
However when I run the same command (as-create-launch-config LcTiagoN --image-id ami-0521316c --instance-type t1.micro --key tiagov) directly logged in the Amazon instance, the command is executed successfully.
Any suggestions?
Sounds like a problem with the PATH environment. Did you login as "chef" when running the as-create-launch-config command manually?
Best advice I can offer is to include the full path to the command in the bash script. For example:
script "teste de script" do
..
code <<-EOH
/path/to/this/cmd/as-create-launch-config ...
EOH
end
i am using sos job scheduler which support many language.i accept the shell script to write jobs but i am not a shell script writer.i want to implement a following points in job scheduler:
execute a shell script A. script A return "success" if time is between 6:00AM and 3PM.else it return "fail".
on "success" execute a shell script C or on "Fail" it execute shell script B.
Script B and Script C send email with“Success” or “Failure” in subject line.
please help me to sortout the above discuss problem.
Thanks
There are two command line utilities that are helpful in this case:
date: Displays the current time/date in a specified format.
mail: Sends e-mail from the command line.
Since we only need the full hour for our logic I use the date format "+%H" (hour from 0-23). This gives the following script basis:
#!/bin/sh
hour=$(date +%H)
if [ $hour -gt 6 -a $hour -lt 15 ]; then
echo "message body" | mail -s Success <your e-mail address>
else
echo "message body" | mail -s Failure <your e-mail address>
fi
#!/bin/bash
hour=$(date +%H)
recipient="root"
case "$hour" in
[6-9]|1[0-5])
subject="success"
body="message"
;;
*)
subject="failure"
body="message"
;;
esac
echo $body | mailx -s "$subject" "$recipient"