synchronize error: "msg": "Failed to find required executable \"rsync\" in paths: /usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"

[jforman]

SUMMARY

I am trying to run an rsync from db1 to backup1 of a directory. When I run the playbook containing this task, I get the error

 "msg": "Failed to find required executable \"rsync\" in paths: /usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"

ISSUE TYPE

• Bug Report

COMPONENT NAME

ansible.posix.synchronize

ANSIBLE VERSION

% ansible-playbook --version
ansible-playbook [core 2.13.5]
  config file = /home/ansible/ansible.cfg
  configured module search path = ['/home/ansible/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/local/lib/python3.10/site-packages/ansible
  ansible collection location = /home/ansible/.ansible/collections:/usr/share/ansible/collections
  executable location = /usr/local/bin/ansible-playbook
  python version = 3.10.7 (main, Sep 13 2022, 01:42:44) [GCC 10.2.1 20210110]
  jinja version = 3.1.2
  libyaml = True

I am running ansible-playbook out of an ansible container I built.

COLLECTION VERSION

% ansible-galaxy collection list ansible.posix

# /usr/local/lib/python3.10/site-packages/ansible_collections
Collection    Version
------------- -------
ansible.posix 1.4.0

CONFIGURATION

% ansible-config dump --only-changed
DEFAULT_PRIVATE_KEY_FILE(/home/ansible/ansible.cfg) = /home/ansible/.ssh/id_rsa
DEFAULT_REMOTE_USER(/home/ansible/ansible.cfg) = ubuntu
HOST_KEY_CHECKING(/home/ansible/ansible.cfg) = False

Playbook:

% cat playbooks/database_backup/playbook.yml
---
- hosts: all
  become: yes

  tasks:
    - name: manually backup postgres db dumps to backup server
      ansible.posix.synchronize:
        private_key: "/root/keys/fnetbackup/id_ssh_rsa"
        src: "/var/lib/postgresql/dumps/"
        dest: "rsync://backup1/backup/{{ ansible_host }}/postgres/"

OS / ENVIRONMENT

Ansible controller: pop_os 22.04 LTS Ansible hosts: Ubuntu 22.04.1 LTS

ansible container built from the following Dockerfile

% cat Dockerfile
FROM python:3-slim

RUN apt-get update && apt-get upgrade -y \
	&& apt-get install -y --no-install-recommends openssh-client sshpass sudo \
	&& pip install pip --upgrade \
	&& pip install ansible \
	&& useradd -g users -m ansible

USER ansible

RUN mkdir -p /home/ansible/.ssh \
	&& echo "UserKnownHostsFile=/dev/null" > /home/ansible/.ssh/config \
	&& echo "StrictHostKeyChecking=noknown_hosts" >> /home/ansible/.ssh/config

WORKDIR /home/ansible

STEPS TO REPRODUCE

% alias ansible-playbook
ansible-playbook='docker run --net=host --rm -it -e SSH_AUTH_SOCK=/ssh-agent -v /etc/resolv.conf:/etc/resolv.conf:ro -v ${SSH_AUTH_SOCK}:/ssh-agent -v $(pwd):/home/ansible -v ~/.ssh:/home/ansible/.ssh:ro jforman/ansible:latest ansible-playbook'

EXPECTED RESULTS

I expected the command to be run on db1, as root:

rsync -avz /var/lib/postgresql/dumps/ rsync://backup1/backup/db1/postgres/ 

ACTUAL RESULTS

The full traceback is:
  File "/tmp/ansible_ansible.posix.synchronize_payload_59vnefw9/ansible_ansible.posix.synchronize_payload.zip/ansible/module_utils/basic.py", line 1435, in get_bin_path
    bin_path = get_bin_path(arg=arg, opt_dirs=opt_dirs)
  File "/tmp/ansible_ansible.posix.synchronize_payload_59vnefw9/ansible_ansible.posix.synchronize_payload.zip/ansible/module_utils/common/process.py", line 42, in get_bin_path
    raise ValueError('Failed to find required executable "%s" in paths: %s' % (arg, os.pathsep.join(paths)))
fatal: [db1]: FAILED! => {
    "changed": false,
    "invocation": {
        "module_args": {
            "_local_rsync_password": null,
            "_local_rsync_path": "rsync",
            "_substitute_controller": false,
            "archive": true,
            "checksum": false,
            "compress": true,
            "copy_links": false,
            "delay_updates": true,
            "delete": false,
            "dest": "rsync://backup1/backup/db1/postgres/",
            "dest_port": null,
            "dirs": false,
            "existing_only": false,
            "group": null,
            "link_dest": null,
            "links": null,
            "mode": "push",
            "owner": null,
            "partial": false,
            "perms": null,
            "private_key": "/root/keys/fnetbackup/id_ssh_rsa",
            "recursive": null,
            "rsync_opts": [],
            "rsync_path": "sudo -u root rsync",
            "rsync_timeout": 0,
            "set_remote_user": true,
            "src": "/var/lib/postgresql/dumps/",
            "ssh_args": null,
            "ssh_connection_multiplexing": false,
            "times": null,
            "verify_host": false
        }
    },
    "msg": "Failed to find required executable \"rsync\" in paths: /usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
}

rsync is definitely installed:

ubuntu@db1:~$ which rsync
/usr/bin/rsync

[manero6]

Same here.

Tested with: rsync_path: "su -c rsync" or rsync_path: "/usr/bin/rsync" or without setting rsync_path.

which -a rsync

/usr/bin/rsync
/bin/rsync

Ubuntu 22.04.4 LTS