931509ef44
Replace PlantUML descriptions with static pictures as PlantUML is not supported in gate. Remove all the related stuff from configs and scripts. Change-Id: I905153ef7d93a1248c76818048f58e24fc1d556d Implements: blueprints.launchpad.net/fuel/+spec/fuel-docs-migration
42 lines
1.8 KiB
ReStructuredText
42 lines
1.8 KiB
ReStructuredText
Sequence Diagrams
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=================
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OS Provisioning
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---------------
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.. image:: _images/uml/nodes_provisioning.png
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:width: 100%
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Networks Verification
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---------------------
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.. image:: _images/uml/network_verification.png
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:width: 100%
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Details on Cluster Provisioning & Deployment (via Facter extension)
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-------------------------------------------------------------------
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.. image:: _images/uml/cluster_deployment.png
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:width: 100%
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Once deploy and provisioning messages are accepted by Astute, provisioning
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method is called. Provisioning part creates system in Cobbler and
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calls reboot over Cobbler. Then Astute uses `MCollective direct addressing
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mode
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<http://www.devco.net/archives/2012/06/19/mcollective-direct-addressing-mode.ph
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p>`_
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to check if all required nodes are available, include puppet agent on them. If
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some nodes are not yet ready, Astute waits for a few seconds and tries to
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request again. When nodes are booted in target OS, Astute uses upload_file
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MCollective plugin to push data to a special file */etc/astute.yaml* on the
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target system.
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Data include role and all other variables needed for deployment. Then, Astute
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calls puppetd MCollective plugin to start deployment. Puppet is started on
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nodes.
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Accordingly, puppet agent starts its run. Modules contain facter extension,
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which runs before deployment. Extension reads data from */etc/astute.yaml*
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placed by mcollective, and extends Facter data with it as a single fact, which
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is then parsed by *parseyaml* function to create *$::fuel_settings* data
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structure. This structure contains all variables as a single hash and
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supports embedding of other rich structures such as nodes hash or arrays.
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Case structure in running class chooses appropriate class to import,
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based on *role* and *deployment_mode* variables found in */etc/astute.yaml*.
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