openstack-manuals/doc/install-guide/source/environment-etcd-ubuntu.rst

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===============
Etcd for Ubuntu
===============
OpenStack services may use Etcd, a distributed reliable key-value store
for distributed key locking, storing configuration, keeping track of service
live-ness and other scenarios.
Install and configure components
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#. Install the ``etcd`` package:
.. code-block:: console
# apt install etcd
#. Edit the ``/etc/default/etcd`` file and set the ``ETCD_INITIAL_CLUSTER``,
``ETCD_INITIAL_ADVERTISE_PEER_URLS``, ``ETCD_ADVERTISE_CLIENT_URLS``,
``ETCD_LISTEN_CLIENT_URLS`` to the management IP address of the
controller node to enable access by other nodes via the management
network:
.. code-block:: none
ETCD_NAME="controller"
ETCD_DATA_DIR="/var/lib/etcd"
ETCD_INITIAL_CLUSTER_STATE="new"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster-01"
ETCD_INITIAL_CLUSTER="controller=http://10.0.0.11:2380"
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://10.0.0.11:2380"
ETCD_ADVERTISE_CLIENT_URLS="http://10.0.0.11:2379"
ETCD_LISTEN_PEER_URLS="http://0.0.0.0:2380"
ETCD_LISTEN_CLIENT_URLS="http://10.0.0.11:2379"
Finalize installation
~~~~~~~~~~~~~~~~~~~~~
#. Enable and start the etcd service:
.. code-block:: console
# systemctl enable etcd
# systemctl start etcd