62 lines
2.2 KiB
ReStructuredText
62 lines
2.2 KiB
ReStructuredText
.. _admin-password-injection:
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====================================
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Injecting the administrator password
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====================================
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Compute can generate a random administrator (root) password and inject
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that password into an instance. If this feature is enabled, users can
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run :command:`ssh` to an instance without an :command:`ssh` keypair.
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The random password appears in the output of the :command:`nova boot` command.
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You can also view and set the admin password from the dashboard.
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**Password injection using the dashboard**
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By default, the dashboard will display the ``admin`` password and allow
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the user to modify it.
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If you do not want to support password injection, disable the password
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fields by editing the dashboard's ``local_settings.py`` file.
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.. code-block:: none
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OPENSTACK_HYPERVISOR_FEATURES = {
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...
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'can_set_password': False,
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}
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**Password injection on libvirt-based hypervisors**
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For hypervisors that use the libvirt back end (such as KVM, QEMU, and
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LXC), admin password injection is disabled by default. To enable it, set
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this option in ``/etc/nova/nova.conf``:
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.. code-block:: ini
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[libvirt]
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inject_password=true
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When enabled, Compute will modify the password of the admin account by
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editing the ``/etc/shadow`` file inside the virtual machine instance.
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.. note::
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Users can only use :command:`ssh` to access the instance by using the admin
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password if the virtual machine image is a Linux distribution, and it has
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been configured to allow users to use :command:`ssh` as the root user. This
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is not the case for `Ubuntu cloud images <http://uec-images.ubuntu.com>`_
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which, by default, does not allow users to use :command:`ssh` to access the
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root account.
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**Password injection and XenAPI (XenServer/XCP)**
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When using the XenAPI hypervisor back end, Compute uses the XenAPI agent
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to inject passwords into guests. The virtual machine image must be
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configured with the agent for password injection to work.
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**Password injection and Windows images (all hypervisors)**
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For Windows virtual machines, configure the Windows image to retrieve
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the admin password on boot by installing an agent such as
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`cloudbase-init <https://cloudbase.it/cloudbase-init>`_.
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