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create.go
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create.go
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package bootkube
import (
"fmt"
"strings"
"time"
"github.com/golang/glog"
"k8s.io/kubernetes/pkg/api"
apierrors "k8s.io/kubernetes/pkg/api/errors"
clientset "k8s.io/kubernetes/pkg/client/clientset_generated/release_1_5"
"k8s.io/kubernetes/pkg/client/restclient"
"k8s.io/kubernetes/pkg/client/unversioned/clientcmd"
clientcmdapi "k8s.io/kubernetes/pkg/client/unversioned/clientcmd/api"
cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
"k8s.io/kubernetes/pkg/kubectl/resource"
"k8s.io/kubernetes/pkg/util/wait"
"github.com/kubernetes-incubator/bootkube/pkg/util"
)
func CreateAssets(manifestDir string, timeout time.Duration) error {
upFn := func() (bool, error) {
if err := apiTest(); err != nil {
glog.Warningf("Unable to determine api-server version: %v", err)
return false, nil
}
return true, nil
}
createFn := func() (bool, error) {
err := createAssets(manifestDir)
if err != nil {
glog.Errorf("Error creating assets: %v", err)
// If error is "system namespace not found" we should retry
if apierrors.IsNotFound(err) {
details := err.(*apierrors.StatusError).Status().Details
if details.Name == api.NamespaceSystem && details.Kind == "namespaces" {
return false, nil // retry
}
}
UserOutput("\nError creating assets: %v\n", err)
UserOutput("\nNOTE: Bootkube failed to create some cluster assets. It is important that manifest errors are resolved and resubmitted to the apiserver.\n")
UserOutput("For example, after resolving issues: kubectl create -f <failed-manifest>\n\n")
}
return true, nil
}
UserOutput("Waiting for api-server...\n")
start := time.Now()
if err := wait.Poll(5*time.Second, timeout, upFn); err != nil {
return fmt.Errorf("API Server unavailable: %v", err)
}
UserOutput("Creating self-hosted assets...\n")
timeout = timeout - time.Since(start)
if err := wait.Poll(5*time.Second, timeout, createFn); err != nil {
return fmt.Errorf("Failed to create assets: %v", err)
}
return nil
}
func createAssets(manifestDir string) error {
config := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(
&clientcmd.ClientConfigLoadingRules{},
&clientcmd.ConfigOverrides{ClusterInfo: clientcmdapi.Cluster{Server: insecureAPIAddr}},
)
f := cmdutil.NewFactory(config)
shouldValidate := true
schema, err := f.Validator(shouldValidate, fmt.Sprintf("~/%s/%s", clientcmd.RecommendedHomeDir, clientcmd.RecommendedSchemaName))
if err != nil {
return err
}
cmdNamespace, enforceNamespace, err := f.DefaultNamespace()
if err != nil {
return err
}
mapper, typer := f.Object()
filenameOpts := &resource.FilenameOptions{
Filenames: []string{manifestDir},
Recursive: false,
}
r := resource.NewBuilder(mapper, typer, resource.ClientMapperFunc(f.ClientForMapping), f.Decoder(true)).
Schema(schema).
ContinueOnError().
NamespaceParam(cmdNamespace).DefaultNamespace().
FilenameParam(enforceNamespace, filenameOpts).
Flatten().
Do()
err = r.Err()
if err != nil {
return err
}
count := 0
err = r.Visit(func(info *resource.Info, err error) error {
if err != nil {
return err
}
obj, err := resource.NewHelper(info.Client, info.Mapping).Create(info.Namespace, true, info.Object)
if err != nil {
if apierrors.IsAlreadyExists(err) {
return nil
}
return cmdutil.AddSourceToErr("creating", info.Source, err)
}
info.Refresh(obj, true)
count++
shortOutput := false
if !shortOutput {
f.PrintObjectSpecificMessage(info.Object, util.GlogWriter{})
}
cmdutil.PrintSuccess(mapper, shortOutput, util.GlogWriter{}, info.Mapping.Resource, info.Name, false, "created")
UserOutput("\tcreated %23s %s\n", info.Name, strings.TrimSuffix(info.Mapping.Resource, "s"))
return nil
})
if err != nil {
return err
}
if count == 0 {
return fmt.Errorf("no objects passed to create")
}
return nil
}
func apiTest() error {
client, err := clientset.NewForConfig(&restclient.Config{Host: insecureAPIAddr})
if err != nil {
return err
}
_, err = client.Discovery().ServerVersion()
return err
}