bad9d9157c
The index page for our install tutorial should point back to the top level OpenStack installation tutorial to give the user information on how to set up the base OpenStack environment before starting installation. This patch adds the link and notes that the setup in there is a prerequisite to executing the Cinder Install Tutorial. Change-Id: I42418b30b3978bac24a856c22342ce5db3e42282
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7.0 KiB
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273 lines
7.0 KiB
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Install and configure a storage node
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Prerequisites
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-------------
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Before you install and configure the Block Storage service on the
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storage node, you must prepare the storage device.
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.. note::
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Perform these steps on the storage node.
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#. Install the supporting utility packages.
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#. Install the LVM packages:
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.. code-block:: console
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# zypper install lvm2
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#. (Optional) If you intend to use non-raw image types such as QCOW2
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and VMDK, install the QEMU package:
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.. code-block:: console
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# zypper install qemu
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.. end
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.. note::
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Some distributions include LVM by default.
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#. Create the LVM physical volume ``/dev/sdb``:
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.. code-block:: console
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# pvcreate /dev/sdb
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Physical volume "/dev/sdb" successfully created
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#. Create the LVM volume group ``cinder-volumes``:
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.. code-block:: console
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# vgcreate cinder-volumes /dev/sdb
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Volume group "cinder-volumes" successfully created
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The Block Storage service creates logical volumes in this volume group.
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#. Only instances can access Block Storage volumes. However, the
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underlying operating system manages the devices associated with
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the volumes. By default, the LVM volume scanning tool scans the
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``/dev`` directory for block storage devices that
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contain volumes. If projects use LVM on their volumes, the scanning
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tool detects these volumes and attempts to cache them which can cause
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a variety of problems with both the underlying operating system
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and project volumes. You must reconfigure LVM to scan only the devices
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that contain the ``cinder-volumes`` volume group. Edit the
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``/etc/lvm/lvm.conf`` file and complete the following actions:
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* In the ``devices`` section, add a filter that accepts the
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``/dev/sdb`` device and rejects all other devices:
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.. path /etc/lvm/lvm.conf
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.. code-block:: bash
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devices {
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...
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filter = [ "a/sdb/", "r/.*/"]
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.. end
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Each item in the filter array begins with ``a`` for **accept** or
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``r`` for **reject** and includes a regular expression for the
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device name. The array must end with ``r/.*/`` to reject any
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remaining devices. You can use the :command:`vgs -vvvv` command
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to test filters.
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.. warning::
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If your storage nodes use LVM on the operating system disk, you
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must also add the associated device to the filter. For example,
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if the ``/dev/sda`` device contains the operating system:
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.. ignore_path /etc/lvm/lvm.conf
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.. code-block:: ini
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filter = [ "a/sda/", "a/sdb/", "r/.*/"]
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.. end
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Similarly, if your compute nodes use LVM on the operating
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system disk, you must also modify the filter in the
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``/etc/lvm/lvm.conf`` file on those nodes to include only
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the operating system disk. For example, if the ``/dev/sda``
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device contains the operating system:
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.. path /etc/openstack-dashboard/local_settings.py
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.. code-block:: ini
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filter = [ "a/sda/", "r/.*/"]
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.. end
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Install and configure components
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--------------------------------
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#. Install the packages:
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.. code-block:: console
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# zypper install openstack-cinder-volume tgt
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#. Edit the ``/etc/cinder/cinder.conf`` file
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and complete the following actions:
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* In the ``[database]`` section, configure database access:
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.. path /etc/cinder/cinder.conf
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.. code-block:: ini
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[database]
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# ...
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connection = mysql+pymysql://cinder:CINDER_DBPASS@controller/cinder
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.. end
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Replace ``CINDER_DBPASS`` with the password you chose for
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the Block Storage database.
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* In the ``[DEFAULT]`` section, configure ``RabbitMQ``
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message queue access:
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.. path /etc/cinder/cinder.conf
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.. code-block:: ini
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[DEFAULT]
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# ...
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transport_url = rabbit://openstack:RABBIT_PASS@controller
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.. end
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Replace ``RABBIT_PASS`` with the password you chose for
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the ``openstack`` account in ``RabbitMQ``.
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* In the ``[DEFAULT]`` and ``[keystone_authtoken]`` sections,
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configure Identity service access:
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.. path /etc/cinder/cinder.conf
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.. code-block:: ini
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[DEFAULT]
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# ...
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auth_strategy = keystone
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[keystone_authtoken]
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# ...
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auth_uri = http://controller:5000
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auth_url = http://controller:35357
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memcached_servers = controller:11211
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auth_type = password
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project_domain_name = default
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user_domain_name = default
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project_name = service
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username = cinder
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password = CINDER_PASS
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.. end
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Replace ``CINDER_PASS`` with the password you chose for the
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``cinder`` user in the Identity service.
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.. note::
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Comment out or remove any other options in the
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``[keystone_authtoken]`` section.
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* In the ``[DEFAULT]`` section, configure the ``my_ip`` option:
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.. path /etc/cinder/cinder.conf
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.. code-block:: ini
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[DEFAULT]
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# ...
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my_ip = MANAGEMENT_INTERFACE_IP_ADDRESS
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.. end
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Replace ``MANAGEMENT_INTERFACE_IP_ADDRESS`` with the IP address
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of the management network interface on your storage node,
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typically 10.0.0.41 for the first node in the
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`example architecture <https://docs.openstack.org/install-guide/overview.html#example-architecture>`_.
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* In the ``[lvm]`` section, configure the LVM back end with the
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LVM driver, ``cinder-volumes`` volume group, iSCSI protocol,
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and appropriate iSCSI service:
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.. path /etc/cinder/cinder.conf
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.. code-block:: ini
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[lvm]
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# ...
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volume_driver = cinder.volume.drivers.lvm.LVMVolumeDriver
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volume_group = cinder-volumes
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iscsi_protocol = iscsi
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iscsi_helper = tgtadm
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.. end
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* In the ``[DEFAULT]`` section, enable the LVM back end:
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.. path /etc/cinder/cinder.conf
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.. code-block:: ini
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[DEFAULT]
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# ...
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enabled_backends = lvm
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.. end
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.. note::
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Back-end names are arbitrary. As an example, this guide
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uses the name of the driver as the name of the back end.
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* In the ``[DEFAULT]`` section, configure the location of the
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Image service API:
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.. path /etc/cinder/cinder.conf
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.. code-block:: ini
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[DEFAULT]
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# ...
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glance_api_servers = http://controller:9292
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.. end
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* In the ``[oslo_concurrency]`` section, configure the lock path:
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.. path /etc/cinder/cinder.conf
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.. code-block:: ini
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[oslo_concurrency]
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# ...
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lock_path = /var/lib/cinder/tmp
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.. end
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#. Create the ``/etc/tgt/conf.d/cinder.conf`` file
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with the following data:
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.. code-block:: shell
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include /var/lib/cinder/volumes/*
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.. end
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Finalize installation
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---------------------
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#. Start the Block Storage volume service including its dependencies
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and configure them to start when the system boots:
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.. code-block:: console
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# systemctl enable openstack-cinder-volume.service tgtd.service
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# systemctl start openstack-cinder-volume.service tgtd.service
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