d87b4f63a2
Restructured the documenation to 1. Add reference at the top 2. Updated the title formatting 3. Updated the heading formatting 4. Updated the links formatting Change-Id: Ie3786e92fee674da1fa39cf07f1bf0a3badd5b92
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1.5 KiB
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38 lines
1.5 KiB
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.. nova-fake-driver:
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================
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Nova Fake Driver
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================
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One common question from OpenStack operators is that "how does the control plane
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(e.g., database, messaging queue, nova-scheduler ) scales?". To answer this
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question, operators setup Rally to drive workload to the OpenStack cloud.
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However, without a large number of nova-compute nodes, it becomes difficult to
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exercise the control performance.
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Given the built-in feature of Docker container, Kolla enables standing up many
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many of nova-compute nodes with nova fake driver on a single host. For example,
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we can create 100 nova-compute containers on a real host to simulate the
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100-hypervisor workload to the nova-conductor and the messaging queue.
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Use nova-fake driver
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====================
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Nova fake driver can not work with all-in-one deployment. This is because the
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fake neutron-openvswitch-agent for the fake nova-compute container conflicts
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with neutron-openvswitch-agent on the compute nodes. Therefore, in the inventory
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the network node must be different than the compute node.
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By default, Kolla uses libvirt driver on the compute node. To use nova-fake
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driver, edit the following parameters in ansible/group_vars or in the
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command line options.
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::
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enable_nova_fake: "yes"
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num_nova_fake_per_node: 5
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Each compute nodes will run 5 nova-compute containers and 5
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neutron-plugin-agent containers. When booting instance, there will be no
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real instances created. But "nova list" shows the fake instances.
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