CODEWITHSUNDEEP
puppet
Brian D
Brian D

Reputation: 2110

Puppet exec unless doesn't appear to work how I expect

I'm trying to clone a db with exec from mysql, but I don't want to clone it if it has already been cloned.

exec { "clone_from_${name}" :
  unless => "/usr/bin/mysql -u${user_to} -p${pwd_to} ${name_to} -e'select count(*) from $test_table_name;' | grep -c ' 0 '",
...

The logic looks a little confusing but basically, the way I understand unless is that if the command returns a 0, then the whole exec wont be run. But it when I try it, it is.

The db has already been created in the vm, and if it's already been cloned, the count returned from the query gives me something other than a ' 0 ', and the grep because it doesn't find the ' 0 ' returns a 0. Unless should make it run then, right?

The output even gives me "Unless: 0" and then "Executing

Thanks.

Upvotes: 1

Views: 3566

Answers (1)

Ger Apeldoorn
Ger Apeldoorn

Reputation: 1232

It's the exitcode that is important, not the number that is printed.

If you run this command manually and do an echo $? afterwards, you get the exitcode.

Also, you want to surpress the output from the command:

exec { "clone_from_${name}" :
  unless => "/usr/bin/mysql -u${user_to} -p${pwd_to} ${name_to} -e'select count(*) from $test_table_name;' | grep ' 0 ' > /dev/null 2>&1",
...

Upvotes: 4

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