List tasks and hosts dry

Preview execution plan: every task and resolved target host, without connecting

ansible-playbook site.yml --list-tasks --list-hosts -i prod
tool
ansible56 commands
tags
ansibledebugtroubleshooting

More ansible commands

  • Per-task timing profile
    ANSIBLE_CALLBACKS_ENABLED=profile_tasks ansible-playbook site.yml

    Rank tasks by wall-clock time to find the slow steps; profile_roles is the per-role variant

  • Keep remote temp files
    ANSIBLE_KEEP_REMOTE_FILES=1 ansible-playbook site.yml -vvvv --limit <host>

    Preserve pushed module scripts under ~/.ansible/tmp to debug a failing module by hand

  • Run a playbook
    ansible-playbook -i inventory/prod playbook.yml --diff

    Run playbook with diff output to see what changes

  • Limit to specific host
    ansible-playbook -i inventory playbook.yml --limit host1,host2

    Run only against specific hosts from inventory

  • Run specific tag
    ansible-playbook -i inventory playbook.yml --tags install,configure

    Execute only tasks matching these tags

all 56 ansible commands