Merge "Fix incorrect RST markups"
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@ -81,12 +81,10 @@ The follow figure depicts the solution designed to have both a
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centralized set of core data centers for OpenStack services and paired edge
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data centers.
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**Multi-site architecture example**
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**Multi-site architecture example**
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.. figure:: ../figures/Multi-Site_Customer_Edge.png
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Geo-redundant load balancing example
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------------------------------------
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@ -166,13 +164,10 @@ An external load balancing service was used and not the LBaaS in
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OpenStack because the solution in OpenStack is not redundant and does
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not have any awareness of geo location.
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.. _ms-geo-redundant:
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**Multi-site geo-redundant architecture**
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**Multi-site geo-redundant architecture**
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.. figure:: ../figures/Multi-site_Geo_Redundant_LB.png
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Location-local service example
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------------------------------
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@ -192,15 +187,13 @@ number of network hops for end users. Despite these differences, the
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storage replication configuration has significant overlap with that of a
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geo-redundant load balancing use case.
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In :ref:`ms-shared-keystone`, the application utilizing this multi-site
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In the below architecture, the application utilizing this multi-site
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OpenStack install that is location-aware would launch web server or content
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serving instances on the compute cluster in each site. Requests from clients
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are first sent to a global services load balancer that determines the location
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of the client, then routes the request to the closest OpenStack site where the
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application completes the request.
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.. _ms-shared-keystone:
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**Multi-site shared keystone architecture**
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.. figure:: ../figures/Multi-Site_shared_keystone1.png
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**Multi-site shared keystone architecture**
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@ -33,7 +33,7 @@ Galera Cluster requires that you open four ports to network traffic:
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This can be achieved through the use of either the ``iptables``
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command such as:
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.. code-block:: console
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.. code-block:: console
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# iptables --append INPUT --in-interface eth0 \
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--protocol tcp --match tcp --dport ${PORT} \
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@ -49,7 +49,7 @@ Alternatively you may be able to make modifications using the
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``firewall-cmd`` utility for FirewallD that is available on many Linux
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distributions:
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.. code-block:: console
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.. code-block:: console
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# firewall-cmd --add-service=mysql --permanent
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# firewall-cmd --add-port=3306/tcp --permanent
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@ -67,7 +67,7 @@ To configure SELinux to permit Galera Cluster to operate, you may need
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to use the ``semanage`` utility to open the ports it uses, for
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example:
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.. code-block:: console
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.. code-block:: console
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# semanage port -a -t mysqld_port_t -p tcp 3306
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@ -75,7 +75,7 @@ Older versions of some distributions, which do not have an up-to-date
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policy for securing Galera, may also require SELinux to be more
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relaxed about database access and actions:
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.. code-block:: console
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.. code-block:: console
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# semanage permissive -a mysqld_t
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