2.7 KiB
Ansible Privilege Escalation
Ansible can use existing privilege escalation systems to allow a user to execute tasks as another.
Topics
Become
Before 1.9 Ansible mostly allowed the use of sudo and a limited use of su to allow a login/remote user to become a different user and execute tasks, create resources with the 2nd user's permissions. As of 1.9 'become' supersedes the old sudo/su, while still being backwards compatible. This new system also makes it easier to add other privilege escalation tools like pbrun (Powerbroker), pfexec and others.
New directives
- become
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equivalent to adding sudo: or su: to a play or task, set to true/yes to activate privilege escalation
- become_user
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equivalent to adding sudo_user: or su_user: to a play or task
- become_method
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at play or task level overrides the default method set in ansible.cfg
New ansible variables
Each allows you to set an option per group and/or host
- ansible_become
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equivalent to ansible_sudo or ansible_su, allows to force privilege escalation
- ansible_become_method
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allows to set privilege escalation method
- ansible_become_user
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equivalent to ansible_sudo_user or ansible_su_user, allows to set the user you become through privilege escalation
- ansible_become_pass
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equivalent to ansible_sudo_pass or ansible_su_pass, allows you to set the privilege escalation password
New command line options -----------------------
- --ask-become-pass
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ask for privilege escalation password
- -b, --become
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run operations with become (no password implied)
- --become-method=BECOME_METHOD
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privilege escalation method to use (default=sudo), valid choices: [ sudo | su | pbrun | pfexec ]
- --become-user=BECOME_USER
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run operations as this user (default=root)
sudo and su still work!
Old playbooks will not need to be changed, even though they are deprecated, sudo and su directives will continue to work though it is recommended to move to become as they may be retired at one point. You cannot mix directives on the same object though, ansible will complain if you try to.
Become will default to using the old sudo/su configs and variables if they exist, but will override them if you specify any of the new ones.
Note
Privilege escalation methods must also be supported by the connection plugin used, most will warn if they do not, some will just ignore it as they always run as root (jail, chroot, etc).
- Mailing List
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Questions? Help? Ideas? Stop by the list on Google Groups
- irc.freenode.net
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#ansible IRC chat channel