// Load starts by running the MigrationRules and then
// takes the loading rules and returns a Config object based on following rules.
// if the ExplicitPath, return the unmerged explicit file
// Otherwise, return a merged config based on the Precedence slice
// A missing ExplicitPath file produces an error. Empty filenames or other missing files are ignored.
// Read errors or files with non-deserializable content produce errors.
// The first file to set a particular map key wins and map key's value is never changed.
// BUT, if you set a struct value that is NOT contained inside of map, the value WILL be changed.
// This results in some odd looking logic to merge in one direction, merge in the other, and then merge the two.
// It also means that if two files specify a "red-user", only values from the first file's red-user are used. Even
// non-conflicting entries from the second file's "red-user" are discarded.
// Relative paths inside of the .kubeconfig files are resolved against the .kubeconfig file's parent folder
// and only absolute file paths are returned.
func (rules *ClientConfigLoadingRules) Load() (*clientcmdapi.Config, error) {
if err := rules.Migrate(); err != nil {
return nil, err
}
errlist := []error{}
kubeConfigFiles := []string{}
// Make sure a file we were explicitly told to use exists
if len(rules.ExplicitPath) > 0 {
if _, err := os.Stat(rules.ExplicitPath); os.IsNotExist(err) {
return nil, err
}
kubeConfigFiles = append(kubeConfigFiles, rules.ExplicitPath)
} else {
kubeConfigFiles = append(kubeConfigFiles, rules.Precedence...)
}
// first merge all of our maps
mapConfig := clientcmdapi.NewConfig()
for _, file := range kubeConfigFiles {
if err := mergeConfigWithFile(mapConfig, file); err != nil {
errlist = append(errlist, err)
}
}
// merge all of the struct values in the reverse order so that priority is given correctly
// errors are not added to the list the second time
nonMapConfig := clientcmdapi.NewConfig()
for i := len(kubeConfigFiles) - 1; i >= 0; i-- {
file := kubeConfigFiles[i]
mergeConfigWithFile(nonMapConfig, file)
}
// since values are overwritten, but maps values are not, we can merge the non-map config on top of the map config and
// get the values we expect.
config := clientcmdapi.NewConfig()
mergo.Merge(config, mapConfig)
mergo.Merge(config, nonMapConfig)
if rules.ResolvePaths() {
if err := ResolveLocalPaths(config); err != nil {
errlist = append(errlist, err)
}
}
return config, errors.NewAggregate(errlist)
}
// Load takes a byte slice and deserializes the contents into Config object.
// Encapsulates deserialization without assuming the source is a file.
func Load(data []byte) (*clientcmdapi.Config, error) {
config := clientcmdapi.NewConfig()
// if there's no data in a file, return the default object instead of failing (DecodeInto reject empty input)
if len(data) == 0 {
return config, nil
}
if err := clientcmdlatest.Codec.DecodeInto(data, config); err != nil {
return nil, err
}
return config, nil
}
"github.com/CAP-ALL/kube2consul/Godeps/_workspace/src/k8s.io/kubernetes/pkg/api"
client "github.com/CAP-ALL/kube2consul/Godeps/_workspace/src/k8s.io/kubernetes/pkg/client/unversioned"
clientauth "github.com/CAP-ALL/kube2consul/Godeps/_workspace/src/k8s.io/kubernetes/pkg/client/unversioned/auth"
clientcmdapi "github.com/CAP-ALL/kube2consul/Godeps/_workspace/src/k8s.io/kubernetes/pkg/client/unversioned/clientcmd/api"
)
var (
// DefaultCluster is the cluster config used when no other config is specified
// TODO: eventually apiserver should start on 443 and be secure by default
DefaultCluster = clientcmdapi.Cluster{Server: "http://localhost:8080"}
// EnvVarCluster allows overriding the DefaultCluster using an envvar for the server name
EnvVarCluster = clientcmdapi.Cluster{Server: os.Getenv("KUBERNETES_MASTER")}
DefaultClientConfig = DirectClientConfig{*clientcmdapi.NewConfig(), "", &ConfigOverrides{}, nil}
)
// ClientConfig is used to make it easy to get an api server client
type ClientConfig interface {
// RawConfig returns the merged result of all overrides
RawConfig() (clientcmdapi.Config, error)
// ClientConfig returns a complete client config
ClientConfig() (*client.Config, error)
// Namespace returns the namespace resulting from the merged
// result of all overrides and a boolean indicating if it was
// overridden
Namespace() (string, bool, error)
}
// DirectClientConfig is a ClientConfig interface that is backed by a clientcmdapi.Config, options overrides, and an optional fallbackReader for auth information