cb77bc295f
This adds defined anchor points for external modules to hook into the software install, config and service dependency chain. This allows external modules to manage software installation (virtualenv, containers, etc) and service management (pacemaker) without needing rely on resources that may change or be renamed. Change-Id: I0b524e354b095f2642fd38a2f88536d15bcdf855
64 lines
2.6 KiB
Puppet
64 lines
2.6 KiB
Puppet
# == Class: nova::deps
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#
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# Nova anchors and dependency management
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#
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class nova::deps {
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# Setup anchors for install, config and service phases of the module. These
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# anchors allow external modules to hook the begin and end of any of these
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# phases. Package or service management can also be replaced by ensuring the
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# package is absent or turning off service management and having the
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# replacement depend on the appropriate anchors. When applicable, end tags
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# should be notified so that subscribers can determine if installation,
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# config or service state changed and act on that if needed.
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anchor { 'nova::install::begin': }
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-> Package<| tag == 'nova-package'|>
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~> anchor { 'nova::install::end': }
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-> anchor { 'nova::config::begin': }
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-> Nova_config<||>
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~> anchor { 'nova::config::end': }
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-> anchor { 'nova::db::begin': }
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-> anchor { 'nova::db::end': }
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~> anchor { 'nova::dbsync::begin': }
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-> anchor { 'nova::dbsync::end': }
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~> anchor { 'nova::service::begin': }
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~> Service<| tag == 'nova-service' |>
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~> anchor { 'nova::service::end': }
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# paste-api.ini config shold occur in the config block also.
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Anchor['nova::config::begin']
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-> Nova_paste_api_ini<||>
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~> Anchor['nova::config::end']
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# Support packages need to be installed in the install phase, but we don't
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# put them in the chain above because we don't want any false dependencies
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# between packages with the nova-package tag and the nova-support-package
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# tag. Note: the package resources here will have a 'before' relationshop on
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# the nova::install::end anchor. The line between nova-support-package and
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# nova-package should be whether or not Nova services would need to be
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# restarted if the package state was changed.
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Anchor['nova::install::begin']
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-> Package<| tag == 'nova-support-package'|>
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-> Anchor['nova::install::end']
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# The following resourcs are managed by calling 'nova manage' and so the
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# database must be provisioned before they can be applied.
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Anchor['nova::dbsync::end']
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-> Nova_cells<||>
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Anchor['nova::dbsync::end']
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-> Nova_floating<||>
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Anchor['nova::dbsync::end']
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-> Nova_network<||>
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# Installation or config changes will always restart services.
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Anchor['nova::install::end'] ~> Anchor['nova::service::begin']
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Anchor['nova::config::end'] ~> Anchor['nova::service::begin']
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# This is here for backwards compatability for any external users of the
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# nova-start anchor. This should be considered deprecated and removed in the
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# N cycle
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anchor { 'nova-start':
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require => Anchor['nova::install::end'],
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before => Anchor['nova::config::begin'],
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}
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}
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