packer-cn/builder/openstack/builder.go

148 lines
3.6 KiB
Go

// The openstack package contains a packer.Builder implementation that
// builds Images for openstack.
package openstack
import (
"fmt"
"github.com/mitchellh/multistep"
"github.com/mitchellh/packer/common"
"github.com/mitchellh/packer/packer"
"github.com/rackspace/gophercloud"
"log"
)
// The unique ID for this builder
const BuilderId = "mitchellh.openstack"
type config struct {
common.PackerConfig `mapstructure:",squash"`
AccessConfig `mapstructure:",squash"`
ImageConfig `mapstructure:",squash"`
RunConfig `mapstructure:",squash"`
tpl *packer.ConfigTemplate
}
type Builder struct {
config config
runner multistep.Runner
}
func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
md, err := common.DecodeConfig(&b.config, raws...)
if err != nil {
return nil, err
}
b.config.tpl, err = packer.NewConfigTemplate()
if err != nil {
return nil, err
}
b.config.tpl.UserVars = b.config.PackerUserVars
// Accumulate any errors
errs := common.CheckUnusedConfig(md)
errs = packer.MultiErrorAppend(errs, b.config.AccessConfig.Prepare(b.config.tpl)...)
errs = packer.MultiErrorAppend(errs, b.config.ImageConfig.Prepare(b.config.tpl)...)
errs = packer.MultiErrorAppend(errs, b.config.RunConfig.Prepare(b.config.tpl)...)
if errs != nil && len(errs.Errors) > 0 {
return nil, errs
}
log.Println(common.ScrubConfig(b.config, b.config.Password))
return nil, nil
}
func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packer.Artifact, error) {
auth, err := b.config.AccessConfig.Auth()
if err != nil {
return nil, err
}
//fetches the api requisites from gophercloud for the appropriate
//openstack variant
api, err := gophercloud.PopulateApi(b.config.RunConfig.OpenstackProvider)
if err != nil {
return nil, err
}
api.Region = b.config.AccessConfig.Region()
csp, err := gophercloud.ServersApi(auth, api)
if err != nil {
log.Printf("Region: %s", b.config.AccessConfig.Region())
return nil, err
}
// Setup the state bag and initial state for the steps
state := new(multistep.BasicStateBag)
state.Put("config", b.config)
state.Put("csp", csp)
state.Put("hook", hook)
state.Put("ui", ui)
// Build the steps
steps := []multistep.Step{
&StepKeyPair{
Debug: b.config.PackerDebug,
DebugKeyPath: fmt.Sprintf("os_%s.pem", b.config.PackerBuildName),
},
&StepRunSourceServer{
Name: b.config.ImageName,
Flavor: b.config.Flavor,
SourceImage: b.config.SourceImage,
SecurityGroups: b.config.SecurityGroups,
Networks: b.config.Networks,
},
&StepAllocateIp{
FloatingIpPool: b.config.FloatingIpPool,
FloatingIp: b.config.FloatingIp,
},
&common.StepConnectSSH{
SSHAddress: SSHAddress(csp, b.config.SSHPort),
SSHConfig: SSHConfig(b.config.SSHUsername),
SSHWaitTimeout: b.config.SSHTimeout(),
},
&common.StepProvision{},
&stepCreateImage{},
}
// Run!
if b.config.PackerDebug {
b.runner = &multistep.DebugRunner{
Steps: steps,
PauseFn: common.MultistepDebugFn(ui),
}
} else {
b.runner = &multistep.BasicRunner{Steps: steps}
}
b.runner.Run(state)
// If there was an error, return that
if rawErr, ok := state.GetOk("error"); ok {
return nil, rawErr.(error)
}
// If there are no images, then just return
if _, ok := state.GetOk("image"); !ok {
return nil, nil
}
// Build the artifact and return it
artifact := &Artifact{
ImageId: state.Get("image").(string),
BuilderIdValue: BuilderId,
Conn: csp,
}
return artifact, nil
}
func (b *Builder) Cancel() {
if b.runner != nil {
log.Println("Cancelling the step runner...")
b.runner.Cancel()
}
}