// Bootstrap bootstraps the given environment. The supplied constraints are
// used to provision the instance, and are also set within the bootstrapped
// environment.
func Bootstrap(ctx environs.BootstrapContext, environ environs.Environ, args BootstrapParams) error {
if err := args.Validate(); err != nil {
return errors.Annotate(err, "validating bootstrap parameters")
}
cfg := environ.Config()
if authKeys := ssh.SplitAuthorisedKeys(cfg.AuthorizedKeys()); len(authKeys) == 0 {
// Apparently this can never happen, so it's not tested. But, one day,
// Config will act differently (it's pretty crazy that, AFAICT, the
// authorized-keys are optional config settings... but it's impossible
// to actually *create* a config without them)... and when it does,
// we'll be here to catch this problem early.
return errors.Errorf("model configuration has no authorized-keys")
}
_, supportsNetworking := environs.SupportsNetworking(environ)
logger.Debugf("model %q supports service/machine networks: %v", cfg.Name(), supportsNetworking)
disableNetworkManagement, _ := cfg.DisableNetworkManagement()
logger.Debugf("network management by juju enabled: %v", !disableNetworkManagement)
// Set default tools metadata source, add image metadata source,
// then verify constraints. Providers may rely on image metadata
// for constraint validation.
var customImageMetadata []*imagemetadata.ImageMetadata
if args.MetadataDir != "" {
var err error
customImageMetadata, err = setPrivateMetadataSources(args.MetadataDir)
if err != nil {
return err
}
}
var bootstrapSeries *string
if args.BootstrapSeries != "" {
bootstrapSeries = &args.BootstrapSeries
}
var bootstrapArchForImageSearch string
if args.BootstrapConstraints.Arch != nil {
bootstrapArchForImageSearch = *args.BootstrapConstraints.Arch
} else if args.ModelConstraints.Arch != nil {
bootstrapArchForImageSearch = *args.ModelConstraints.Arch
} else {
bootstrapArchForImageSearch = arch.HostArch()
// We no longer support i386.
if bootstrapArchForImageSearch == arch.I386 {
bootstrapArchForImageSearch = arch.AMD64
}
}
ctx.Verbosef("Loading image metadata")
imageMetadata, err := bootstrapImageMetadata(environ,
bootstrapSeries,
bootstrapArchForImageSearch,
args.BootstrapImage,
&customImageMetadata,
)
if err != nil {
return errors.Trace(err)
}
// We want to determine a list of valid architectures for which to pick tools and images.
// This includes architectures from custom and other available image metadata.
architectures := set.NewStrings()
if len(customImageMetadata) > 0 {
for _, customMetadata := range customImageMetadata {
architectures.Add(customMetadata.Arch)
}
}
if len(imageMetadata) > 0 {
for _, iMetadata := range imageMetadata {
architectures.Add(iMetadata.Arch)
}
}
constraintsValidator, err := environ.ConstraintsValidator()
if err != nil {
return err
}
constraintsValidator.UpdateVocabulary(constraints.Arch, architectures.SortedValues())
bootstrapConstraints, err := constraintsValidator.Merge(
args.ModelConstraints, args.BootstrapConstraints,
)
if err != nil {
return errors.Trace(err)
}
// The arch we use to find tools isn't the boostrapConstraints arch.
// We copy the constraints arch to a separate variable and
// update it from the host arch if not specified.
// (axw) This is still not quite right:
// For e.g. if there is a MAAS with only ARM64 machines,
// on an AMD64 client, we're going to look for only AMD64 tools,
// limiting what the provider can bootstrap anyway.
var bootstrapArch string
if bootstrapConstraints.Arch != nil {
bootstrapArch = *bootstrapConstraints.Arch
} else {
// If no arch is specified as a constraint, we'll bootstrap
// on the same arch as the client used to bootstrap.
bootstrapArch = arch.HostArch()
// We no longer support controllers on i386.
// If we are bootstrapping from an i386 client,
// we'll look for amd64 tools.
if bootstrapArch == arch.I386 {
bootstrapArch = arch.AMD64
}
}
var availableTools coretools.List
if !args.BuildAgent {
ctx.Infof("Looking for packaged Juju agent version %s for %s", args.AgentVersion, bootstrapArch)
availableTools, err = findPackagedTools(environ, args.AgentVersion, &bootstrapArch, bootstrapSeries)
if err != nil && !errors.IsNotFound(err) {
return err
}
}
// If there are no prepackaged tools and a specific version has not been
// requested, look for or build a local binary.
var builtTools *sync.BuiltAgent
if len(availableTools) == 0 && (args.AgentVersion == nil || isCompatibleVersion(*args.AgentVersion, jujuversion.Current)) {
if args.BuildAgentTarball == nil {
return errors.New("cannot build agent binary to upload")
}
if err := validateUploadAllowed(environ, &bootstrapArch, bootstrapSeries, constraintsValidator); err != nil {
return err
}
if args.BuildAgent {
ctx.Infof("Building local Juju agent binary version %s for %s", args.AgentVersion, bootstrapArch)
} else {
ctx.Infof("No packaged binary found, preparing local Juju agent binary")
}
var forceVersion version.Number
availableTools, forceVersion = locallyBuildableTools(bootstrapSeries)
builtTools, err = args.BuildAgentTarball(args.BuildAgent, &forceVersion, cfg.AgentStream())
if err != nil {
return errors.Annotate(err, "cannot package bootstrap agent binary")
}
defer os.RemoveAll(builtTools.Dir)
for i, tool := range availableTools {
if tool.URL != "" {
continue
}
filename := filepath.Join(builtTools.Dir, builtTools.StorageName)
tool.URL = fmt.Sprintf("file://%s", filename)
tool.Size = builtTools.Size
tool.SHA256 = builtTools.Sha256Hash
availableTools[i] = tool
}
}
if len(availableTools) == 0 {
return errors.New(noToolsMessage)
}
// If we're uploading, we must override agent-version;
// if we're not uploading, we want to ensure we have an
// agent-version set anyway, to appease FinishInstanceConfig.
// In the latter case, setBootstrapTools will later set
// agent-version to the correct thing.
agentVersion := jujuversion.Current
if args.AgentVersion != nil {
agentVersion = *args.AgentVersion
}
if cfg, err = cfg.Apply(map[string]interface{}{
"agent-version": agentVersion.String(),
}); err != nil {
return err
}
if err = environ.SetConfig(cfg); err != nil {
return err
}
ctx.Verbosef("Starting new instance for initial controller")
result, err := environ.Bootstrap(ctx, environs.BootstrapParams{
CloudName: args.CloudName,
CloudRegion: args.CloudRegion,
ControllerConfig: args.ControllerConfig,
ModelConstraints: args.ModelConstraints,
BootstrapConstraints: bootstrapConstraints,
BootstrapSeries: args.BootstrapSeries,
Placement: args.Placement,
AvailableTools: availableTools,
ImageMetadata: imageMetadata,
})
if err != nil {
return err
}
matchingTools, err := availableTools.Match(coretools.Filter{
Arch: result.Arch,
Series: result.Series,
})
if err != nil {
return err
}
selectedToolsList, err := getBootstrapToolsVersion(matchingTools)
if err != nil {
return err
}
// We set agent-version to the newest version, so the agent will immediately upgrade itself.
// Note that this only is relevant if a specific agent version has not been requested, since
// in that case the specific version will be the only version available.
newestVersion, _ := matchingTools.Newest()
if err := setBootstrapToolsVersion(environ, newestVersion); err != nil {
return err
}
logger.Infof("Installing Juju agent on bootstrap instance")
publicKey, err := userPublicSigningKey()
if err != nil {
return err
}
instanceConfig, err := instancecfg.NewBootstrapInstanceConfig(
args.ControllerConfig,
bootstrapConstraints,
args.ModelConstraints,
result.Series,
publicKey,
)
if err != nil {
return err
}
if err := instanceConfig.SetTools(selectedToolsList); err != nil {
return errors.Trace(err)
}
// Make sure we have the most recent environ config as the specified
// tools version has been updated there.
cfg = environ.Config()
if err := finalizeInstanceBootstrapConfig(ctx, instanceConfig, args, cfg, customImageMetadata); err != nil {
return errors.Annotate(err, "finalizing bootstrap instance config")
}
if err := result.Finalize(ctx, instanceConfig, args.DialOpts); err != nil {
return err
}
ctx.Infof("Bootstrap agent now started")
return nil
}