How to execute ansible playbook from crontab?

You can use cron jobs to run your playbooks.
Ansible calls ssh with -tt switch to force TTY, so it should work nice.
Just check the following:

job user has access to ssh private keys
job environment is correct (PYTHONPATH, etc...)
there is no package mixture on the host (e.g. ansible installed via pip and apt at the same time)

Also check this handy comment about quiet option absence in ansible:

There's a trick for crontab: run ansible-playbook as follows:

*/15 * * * *    if ! out=`ansible-playbook yourplaybook.yaml`; then echo $out; fi

This way you get complete output, but only if ansible exited with a non-zero status.

It will also work, I am using this to check an agent status and starting it if it is stopped.

*/5 * * * * ansible-playbook -i /root/playbooks/agent /root/playbooks/agent.yml

We can run as konstantin-suvorov's answer as well as

type

# whereis ansible-playbook
  /usr/bin/ansible-playbook

and run with the path displayed in the output

we can run with this in crontab

#crontab -e


*/15 * * * * /usr/bin/ansible-playbook /home/user1/yourplaybook.yml

It worked like charm

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