prometheus_version: latest => failed to get sha256sums.txt

[Poil]

Hi,

A little error :)

FAILED! => {"msg": "An unhandled exception occurred while running the lookup plugin 'url'. Error was a <class 'ansible.errors.AnsibleError'>, original message: Received HTTP error for https://github.com/prometheus/prometheus/releases/download/vlatest/sha256sums.txt : HTTP Error 404: Not Found"}

Best regards

[paulfantom]

What was the status of Get latest release task in run with prometheus_version: latest? Did you run playbook with some tags specified, if so with which ones?

[Poil]

Hi,

It looks like the version is set but not taken into account in the checksum download task

TASK [cloudalchemy.prometheus : Get latest release] is OK (very long json)

And after

TASK [cloudalchemy.prometheus : Set prometheus version to 2.12.0] 

task path: /home/bdupuis/git/vpnssl/ansible/roles/cloudalchemy.prometheus/tasks/preflight.yml:91
Monday 23 September 2019  10:36:53 +0200 (0:00:02.941)       0:00:07.842 ****** 

ok: [vpnssl-d01-mon] => {
    "ansible_facts": {
        "prometheus_version": "2.12.0"
    }, 
    "changed": false
}

I tried to look in preflight.yml but I don't understand why it's not working. (ansible 2.8.4)

[paulfantom]

It looks like for some reason prometheus_version is not passed to next tasks. All this is happening in https://github.com/cloudalchemy/ansible-prometheus/blob/master/tasks/preflight.yml#L75-L101. It is strange that there is any error here as we are constantly checking the validity of that piece of code with molecule playbook at https://github.com/cloudalchemy/ansible-prometheus/blob/master/molecule/latest/playbook.yml

Which ansible version are you using?

[Poil]

ansible 2.8.4
  config file = /home/xxxx/git/vpnssl/ansible/ansible.cfg
  configured module search path = [u'/home/xxxx/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/dist-packages/ansible
  executable location = /usr/bin/ansible
  python version = 2.7.16 (default, Jul  9 2019, 16:43:02) [GCC 8.3.0]

[paulfantom]

PR #239 can act as a workaround for this issue.

[x25]

got the same error on MacOS Mojave

TASK [cloudalchemy.prometheus : Get checksum for amd64 architecture] *****************************************************************************************
objc[4197]: +[NSValue initialize] may have been in progress in another thread when fork() was called.
objc[4197]: +[NSValue initialize] may have been in progress in another thread when fork() was called. We cannot safely call it or ignore it in the fork() child process. Crashing instead. Set a breakpoint on objc_initializeAfterForkError to debug.

this error could be temporary resolved by exporting OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES

[paulfantom]

@x25 this is an ansible problem and not something we can fix here.

[KevinGimbel]

In case anyone is looking for a workaround: ansible/ansible#62244 (comment)

The following works on MacOS (10.14.6).

$ OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES ansible-playbook site.yml

Another workaround for MacOS Catalina: ansible/ansible#65108 (comment)

Edit: Just realized the above comment also mentions the env variable 🤦‍♂; Anyway links to ansible bug tracker are relevant IMO

[paulfantom]

This is a general python issue on macOS and I do not treat it as an issue with ansible role itself. I am closing this as good workarounds are provided in #230 (comment)

[zachcheung]

$ cat playbook.yml
---
- name: Run role
  hosts: all
  any_errors_fatal: true
  roles:
    - cloudalchemy.prometheus
  vars:
    prometheus_version: latest

When you run ansible-playbook -v playbook.yml, it will be OK, but if you pass prometheus_version=latest in cmd ansible-playbook -v playbook.yml -e prometheus_version=latest it'll fail:

  msg: 'An unhandled exception occurred while running the lookup plugin ''url''. Error was a <class ''ansible.errors.AnsibleError''>, original message: Received HTTP error for https://github.com/prometheus/prometheus/releases/download/vlatest/sha256sums.txt : HTTP Error 404: Not Found'

$ cat playbook.yml
---
- name: Run role
  hosts: all
  any_errors_fatal: true
  tasks:
    - include_role:
        name: cloudalchemy.prometheus
      vars:
        prometheus_version: latest

If you use in include_role along with vars, it'll also fail to run ansible-playbook -v playbook.yml.

It's all because of variable precedence, vars from -e or vars in include_role has higher priority than set_fact in preflight.yml.