Esempio n. 1
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// constructImageConstraint returns model-specific criteria used to look for image metadata.
func (p *ProvisionerAPI) constructImageConstraint(m *state.Machine) (*imagemetadata.ImageConstraint, environs.Environ, error) {
	// If we can determine current region,
	// we want only metadata specific to this region.
	cloud, env, err := p.obtainEnvCloudConfig()
	if err != nil {
		return nil, nil, errors.Trace(err)
	}

	lookup := simplestreams.LookupParams{
		Series: []string{m.Series()},
		Stream: env.Config().ImageStream(),
	}

	mcons, err := m.Constraints()
	if err != nil {
		return nil, nil, errors.Annotatef(err, "cannot get machine constraints for machine %v", m.MachineTag().Id())
	}

	if mcons.Arch != nil {
		lookup.Arches = []string{*mcons.Arch}
	}
	if cloud != nil {
		lookup.CloudSpec = *cloud
	}

	return imagemetadata.NewImageConstraint(lookup), env, nil
}
Esempio n. 2
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func NewImageConstraint(params simplestreams.LookupParams) *ImageConstraint {
	if len(params.Series) == 0 {
		params.Series = series.SupportedSeries()
	}
	if len(params.Arches) == 0 {
		params.Arches = arch.AllSupportedArches
	}
	return &ImageConstraint{LookupParams: params}
}