/bin/sh: 1: /_usr/bin/python: not found

ISSUE TYPE

Bug Report

container.yml

version: "2"
settings:
  conductor:
    base: alpine:latest
  wpdb:
    from: mariadb:latest
    roles:
      - { role: mysql, mysql: "{% raw %} {{ site.mysql }} {% endraw %}" }
    ports: 
      - "3306:3306"

OS / ENVIRONMENT

Ansible Container, version 0.9.2
Linux, 4.9.0-5-amd64, #1 SMP Debian 4.9.65-3+deb9u2 (2018-01-04), x86_64
2.7.13 (default, Nov 24 2017, 17:33:09)

SUMMARY

I can't provision mariadb (based on Debian Jessie) using Alpine as a connector.

STEPS TO REPRODUCE

mysql/tasks/main.yml

- name: Create mysql database
  mysql_db: name="{{ mysql.db }}" state=present

EXPECTED RESULTS

image built

ACTUAL RESULTS

ansible-playbook 2.5.0
  config file = None
  configured module search path = [u'/root/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/site-packages/ansible
  executable location = /usr/bin/ansible-playbook
  python version = 2.7.13 (default, Dec 22 2016, 09:22:15) [GCC 6.2.1 20160822]
[...]
<f1638292cd4472b0f0f719e024687d5ce1a9143674e4965b4f17568d27492f3f> EXEC ['/usr/local/bin/docker', 'exec', '-i', u'f1638292cd4472b0f0f719e024687d5ce1a9143674e4965b4f17568d27492f3f', u'/bin/sh', '-c', u'/bin/sh -c \'/usr/bin/python /root/.ansible/tmp/ansible-tmp-1520948786.2-72874583801818/setup.py; rm -rf "/root/.ansible/tmp/ansible-tmp-1520948786.2-72874583801818/" > /dev/null 2>&1 && sleep 0\'']
fatal: [wpdb]: FAILED! => {
    "changed": false,
    "failed": true,
    "module_stderr": "/bin/sh: 1: /_usr/bin/python: not found\n",
    "module_stdout": "",
    "msg": "MODULE FAILURE",
    "rc": 0
}

NOTE 1:

Running this raw task with gather_facts: no: - raw: "ls -l /_usr/bin/python*" shows that the executable actually exists:

<30d2d9db2593af00f6ebdc413a47890e6ce1b061b13bb88c1dfad1f4385417ee> EXEC ['/usr/local/bin/docker', 'exec', '-i', u'30d2d9db2593af00f6ebdc413a47890e6ce1b061b13bb88c1dfad1f4385417ee', u'/bin/sh', '-c', u'ls -l /_usr/bin/python*']
changed: [wpdb] => {
    "changed": true,
    "failed": false,
    "rc": 0,
    "stderr": "",
[...]
    "stdout_lines": [
        "lrwxrwxrwx 1 root root    7 Sep 16 10:56 /_usr/bin/python -> python2",
        "lrwxrwxrwx 1 root root   14 Sep 16 10:56 /_usr/bin/python-config -> python2-config",
        "lrwxrwxrwx 1 root root    9 Sep 16 10:56 /_usr/bin/python2 -> python2.7",
        "lrwxrwxrwx 1 root root   16 Sep 16 10:56 /_usr/bin/python2-config -> python2.7-config",
        "-rwxr-xr-x 1 root root 5808 Dec 22  2016 /_usr/bin/python2.7",
        "-rwxr-xr-x 1 root root 1681 Dec 22  2016 /_usr/bin/python2.7-config"
    ]
}

NOTE 2:

30d2d9db2593 being the container:

docker exec -ti  30d2d9db2593 /_usr/bin/python2.7 --help
OCI runtime exec failed: exec failed: container_linux.go:296: starting container process caused "no such file or directory": unknown

and the file actually exists in /_usr/bin, is an executable:

$ ls -l /_usr/bin/python2.7
-rwxr-xr-x 1 root root 5808 Dec 22  2016 /_usr/bin/python2.7
$ md5sum /_usr/bin/python2.7
ea4bf93fec727e9626f70554b7ff7005  /_usr/bin/python2.7
$ dd if=/usr/bin/python2.7 of=/dev/stdout bs=1 count=5 status=none
ELF

The same applies for all binaries not symlinked to /bin/busybox, ex:

/_usr/bin/ssh -V
bash: /_usr/bin/ssh: No such file or directory

WORKAROUND:

Install Python3 in the guest mariadb container, using: In container.yml - { role: mysql, gather_facts: no, ansible_python_interpreter: "/usr/bin/python3", mysql: "{% raw %} {{ site.mysql }} {% endraw %}" }

In mysql/tasks/main.yml - raw: "apt-get update && apt-get -y install python3-minimal"

Run with: ansible-container --debug --vars-files vars/main.yml build --use-local-python

ansible / ansible-container