Wrapper script for ansible-playbook to apply a role to a host without playbook or hosts file.

ansible-adhoc.sh

#!/bin/bash
#
# Originally by Konstantin Suvorov, see for more info:
# https://stackoverflow.com/questions/38350674/ansible-can-i-execute-role-from-command-line
#
# With modifications by Steve Molin

# Number (vs lexical) comparison

if [[ $# -lt 2 ]]; then
  cat <<HELP
Wrapper script for ansible-playbook to apply a role to a host without playbook or hosts file.

Usage: $0 <host-pattern> <role-name> [ansible-playbook options]

Examples:
  $0 dest_host my_role
  $0 custom_host my_role -i 'custom_host,' -vv --check
HELP
  exit
fi

HOST_PATTERN=$1
shift
ROLE=$1
shift

# Use a temp file so that the --step flag (which requires stdin) works

temp_file=$(mktemp)
cat > $temp_file <<END
---
- hosts: $HOST_PATTERN
  become: true
  roles:
    - $ROLE
END

echo "Trying to apply role \"$ROLE\" to host/group \"$HOST_PATTERN\"..."

export ANSIBLE_ROLES_PATH="ansible/roles"
export ANSIBLE_RETRY_FILES_ENABLED="False"

set -x
ansible-playbook $temp_file -i "${HOST_PATTERN}," "$@"
set +x

/bin/rm temp_file