Invalid data passed to 'loop', it requires a list

[Twansparant]

Hi there,

We've been using your excellent backup role for all of our production servers and it works great!
In my latest project using these versions:

1. Ansible 2.13.3 (system 2.10.17)
2. Trellis 1.16.0
3. backup 2.1.7
4. lafranceinsoumise.backup 5.5.0

I am suddenly getting an ansible error while re-provisioning:

TASK [lafranceinsoumise.backup : Install backup profile dependencies] **********
System info:
  Ansible 2.13.3; Darwin
  Trellis 1.16.0: July 18th, 2022
---------------------------------------------------
Invalid data passed to 'loop', it requires a list, got this instead:
[{'name': 'example.com_uploads', 'schedule': '0 4 * * *', 'source':
'/srv/www/example.com/shared/uploads', 'target':
's3://ams3.digitaloceanspaces.com/backups/example.com//uploads',
'target_user': False, 'target_pass': False, 'max_age': '3M', 'full_max_age':
'1M', 'max_full_backups': '3', 'params': ['export S3_USE_SIGV4="True"'],
'action': 'purge_backup --force'}] + [{'name': 'example.com_database',
'schedule': '0 4 * * *', 'source': 'mysql://example.com_production', 'target':
's3://ams3.digitaloceanspaces.com/backups/example.com//database',
'target_user': False, 'target_pass': False, 'max_age': '3M', 'full_max_age':
'1M', 'max_full_backups': '3', 'params': ['export S3_USE_SIGV4="True"'],
'action': 'purge_backup --force'}]. Hint: If you passed a list/dict of just
one element, try adding wantlist=True to your lookup invocation or use
q/query instead of lookup.
fatal: [159.223.217.50]: FAILED! => {}

I'm using the exact same variables as in my other projects which provisioned without any errors?
In my wordpress_sites.yml:

    backup:
      enabled: true
      auto: true
      target: s3://ams3.digitaloceanspaces.com/backups/example.com/
      schedule: '0 4 * * *'
      purge: true
      max_age: 3M
      full_max_age: 1M
      max_full_backups: 3
      params:
        - 'export S3_USE_SIGV4="True"'

In my vault.yml:

backup_env:
  AWS_ACCESS_KEY_ID: XXXXXXXX
  AWS_SECRET_ACCESS_KEY: XXXXXXXX

I can see the {{ backup_profiles }} variable being constructed here as:

[{...}] + [{...}]

But the error states this is not a valid ansible list syntax?
I'm guessing this has to do with my project's ansible version since the other projects run fine?

Anyone else bumped into this?
Thanks!

[rutger1140]

Did you try older versions of Ansible? This looks like a syntax error with newer versions.
We’ve been running this role with 2.9. Could try 2.9?

[Twansparant]

Hi @rutger1140, thanks for your reply!
The weird thing is, Trellis has had a minimum Ansible version of 2.10 since december 2021 and I have setup loads of new trellis projects after that with your role without any problems?

When I change the ansible version in requirements.txt to:

ansible>=2.10.0,<2.12

And run

trellis exec ansible --version 

It will use ansible 2.10.17 and re-provisioning runs fine!
So it must be a change in 2.11 or 2.12.

[jakobmeusburger]

Is there any update on this? How did you fix it?

[Twansparant]

Is there any update on this? How did you fix it?

Put this in requirements.txt:
ansible>=2.10.0,<2.12

And run:
rm -rf .trellis && trellis init

[E-VANCE]

Ran into the same error using ansible core 2.15.1 and adjusting the requirements does the trick – thanks!

But I would still like to know how to get this to work with the newer Ansible versions by adjusting the syntax 😉 If anyone manages to do so please post the solution here 🙏

[rutger1140]

@E-VANCE the role has multiple external dependencies that need to be upgraded as well. This trellis role is actually pretty minimal.

It would be nice to have a more recent version of Ansible supported. Feel free to issue a pull request and check Ansible version support of the other roles.