Cannot install crontab using shell provisioner on an EC2 instance

[Stan Svec]

I'm trying to install crontab on an AMI image using the shell provisioner like this:

{
  "type": "shell",
  "skip_clean": true,
  "inline": [
    "some commands above and here and then..",
    "(crontab -l 2> /dev/null; echo '0 03 * * * /home/ec2-user/cron/some-script.sh') | crontab -"
  ]
}

SSH username in the builder is set to ec2-user. The problem is that when I create an instance from the image and log in I cannot see any cron installed by checking with crontab -l. However when I keep the script on the image by setting skip_clean to true and execute the script again manually (as ec2-user) then the cron entry is set up. That seems strange to me, because all other commands in the inline sections execute just fine. Any thoughts please?

Thanks,

Stan

[Rickard von Essen]

Just drop your cronfile into /etc/cron.d/ see https://help.ubuntu.com/community/CronHowto#Two_Other_Types_of_Crontab

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[Stan Svec]

I'll do it as you suggest. Thanks.

On Thursday, 10 August 2017 20:15:13 UTC+1, Rickard von Essen wrote:

Just drop your cronfile into /etc/cron.d/ see https://help.ubuntu.com/community/CronHowto#Two_Other_Types_of_Crontab

On Aug 10, 2017 20:43, "Stan Svec" <stan....@gmail.com> wrote:

I'm trying to install crontab on an AMI image using the shell provisioner like this:

{
  "type": "shell",
  "skip_clean": true,
  "inline": [
    "some commands above and here and then..",
    "(crontab -l 2> /dev/null; echo '0 03 * * * /home/ec2-user/cron/some-script.sh') | crontab -"
  ]
}

SSH username in the builder is set to ec2-user. The problem is that when I create an instance from the image and log in I cannot see any cron installed by checking with crontab -l. However when I keep the script on the image by setting skip_clean to true and execute the script again manually (as ec2-user) then the cron entry is set up. That seems strange to me, because all other commands in the inline sections execute just fine. Any thoughts please?

Thanks,

Stan

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GitHub Issues: https://github.com/mitchellh/packer/issues
IRC: #packer-tool on Freenode
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