airshipctl/pkg/k8s/utils/utils.go
Ruslan Aliev 0c4d8b80bf Allow to configure timeout for k8s client
It would be helpful to have a possibility to configure Timeout
field, as well as others allowed.

Change-Id: I1e0e895b7ca6a17e86a6ad36f405e2538775cbbb
Closes: #553
Signed-off-by: Ruslan Aliev <raliev@mirantis.com>
2021-05-28 00:28:30 -05:00

118 lines
3.5 KiB
Go

/*
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
https://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package utils
import (
"bytes"
"io"
"os"
"k8s.io/apimachinery/pkg/api/meta"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/cli-runtime/pkg/genericclioptions"
cmdutil "k8s.io/kubectl/pkg/cmd/util"
"sigs.k8s.io/cli-utils/pkg/manifestreader"
"sigs.k8s.io/cli-utils/pkg/util/factory"
"opendev.org/airship/airshipctl/pkg/document"
)
// ClientOption is a function that allows to modify ConfigFlags object which is used to create Client
type ClientOption func(*genericclioptions.ConfigFlags)
// SetTimeout sets Timeout option in ConfigFlags object
func SetTimeout(timeout string) ClientOption {
return func(co *genericclioptions.ConfigFlags) {
*co.Timeout = timeout
}
}
// FactoryFromKubeConfig returns a factory with the
// default Kubernetes resources for the given kube config path and context
func FactoryFromKubeConfig(path, context string, opts ...ClientOption) cmdutil.Factory {
kf := genericclioptions.NewConfigFlags(false)
kf.KubeConfig = &path
kf.Context = &context
for _, o := range opts {
o(kf)
}
return cmdutil.NewFactory(cmdutil.NewMatchVersionFlags(&factory.CachingRESTClientGetter{
Delegate: kf,
}))
}
// Streams returns default IO streams object, like stdout, stdin, stderr
func Streams() genericclioptions.IOStreams {
return genericclioptions.IOStreams{
In: os.Stdin,
Out: os.Stdout,
ErrOut: os.Stderr,
}
}
// ManifestReaderFactory factory function for manifestreader.ManifestReader
type ManifestReaderFactory func(
validate bool,
bundle document.Bundle,
mapper meta.RESTMapper) manifestreader.ManifestReader
// DefaultManifestReaderFactory default factory function for manifestreader.ManifestReader
var DefaultManifestReaderFactory ManifestReaderFactory = func(
validate bool,
bundle document.Bundle,
mapper meta.RESTMapper) manifestreader.ManifestReader {
return NewManifestBundleReader(validate, bundle, mapper)
}
// NewManifestBundleReader returns implementation of manifestreader interface
func NewManifestBundleReader(
validate bool,
bundle document.Bundle,
mapper meta.RESTMapper) *ManifestBundleReader {
opts := manifestreader.ReaderOptions{
Mapper: mapper,
Validate: validate,
Namespace: metav1.NamespaceDefault,
}
buffer := bytes.NewBuffer([]byte{})
return &ManifestBundleReader{
Bundle: bundle,
writer: buffer,
StreamReader: &manifestreader.StreamManifestReader{
ReaderName: "airship",
Reader: buffer,
ReaderOptions: opts,
},
}
}
// ManifestBundleReader implements manifestreader interface that to transform bundle to slice
// of *resource.Info objects using Read() method.
type ManifestBundleReader struct {
Bundle document.Bundle
StreamReader *manifestreader.StreamManifestReader
writer io.Writer
}
func (mbr *ManifestBundleReader) Read() ([]*unstructured.Unstructured, error) {
err := mbr.Bundle.Write(mbr.writer)
if err != nil {
return nil, err
}
return mbr.StreamReader.Read()
}