788b49f554
This patch: - renames all the RST files in the ops-guide folder to use a hyphen instead of underscore; - adds redirects to the renamed files to .htacces; - removes /([a-z-]+) from Admin Guide redirects in .htacces. Change-Id: I4c35a4c89ae9900a2e9bfe1a7a3bcb94ab72454b Implements: blueprint consistency-file-rename
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2.9 KiB
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65 lines
2.9 KiB
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=====================
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Working with Hardware
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=====================
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As for your initial deployment, you should ensure that all hardware is
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appropriately burned in before adding it to production. Run software
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that uses the hardware to its limits—maxing out RAM, CPU, disk, and
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network. Many options are available, and normally double as benchmark
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software, so you also get a good idea of the performance of your
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system.
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Adding a Compute Node
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~~~~~~~~~~~~~~~~~~~~~
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If you find that you have reached or are reaching the capacity limit of
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your computing resources, you should plan to add additional compute
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nodes. Adding more nodes is quite easy. The process for adding compute
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nodes is the same as when the initial compute nodes were deployed to
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your cloud: use an automated deployment system to bootstrap the
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bare-metal server with the operating system and then have a
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configuration-management system install and configure OpenStack Compute.
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Once the Compute service has been installed and configured in the same
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way as the other compute nodes, it automatically attaches itself to the
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cloud. The cloud controller notices the new node(s) and begins
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scheduling instances to launch there.
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If your OpenStack Block Storage nodes are separate from your compute
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nodes, the same procedure still applies because the same queuing and
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polling system is used in both services.
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We recommend that you use the same hardware for new compute and block
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storage nodes. At the very least, ensure that the CPUs are similar in
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the compute nodes to not break live migration.
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Adding an Object Storage Node
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Adding a new object storage node is different from adding compute or
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block storage nodes. You still want to initially configure the server by
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using your automated deployment and configuration-management systems.
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After that is done, you need to add the local disks of the object
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storage node into the object storage ring. The exact command to do this
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is the same command that was used to add the initial disks to the ring.
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Simply rerun this command on the object storage proxy server for all
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disks on the new object storage node. Once this has been done, rebalance
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the ring and copy the resulting ring files to the other storage nodes.
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.. note::
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If your new object storage node has a different number of disks than
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the original nodes have, the command to add the new node is
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different from the original commands. These parameters vary from
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environment to environment.
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Replacing Components
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~~~~~~~~~~~~~~~~~~~~
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Failures of hardware are common in large-scale deployments such as an
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infrastructure cloud. Consider your processes and balance time saving
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against availability. For example, an Object Storage cluster can easily
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live with dead disks in it for some period of time if it has sufficient
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capacity. Or, if your compute installation is not full, you could
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consider live migrating instances off a host with a RAM failure until
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you have time to deal with the problem.
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