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/*
Copyright 2020 The Kubernetes Authors.
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
http://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 nodeimage
import (
"fmt"
"net/url"
"os"
"runtime"
"sigs.k8s.io/kind/pkg/build/nodeimage/internal/kube"
"sigs.k8s.io/kind/pkg/errors"
"sigs.k8s.io/kind/pkg/internal/version"
"sigs.k8s.io/kind/pkg/log"
)
// Build builds a node image using the supplied options
func Build(options ...Option) error {
// default options
ctx := &buildContext{
image: DefaultImage,
baseImage: DefaultBaseImage,
logger: log.NoopLogger{},
arch: runtime.GOARCH,
}
// apply user options
for _, option := range options {
if err := option.apply(ctx); err != nil {
return err
}
}
// verify that we're using a supported arch
if !supportedArch(ctx.arch) {
ctx.logger.Warnf("unsupported architecture %q", ctx.arch)
}
if ctx.buildType == "" {
ctx.buildType = detectBuildType(ctx.kubeParam)
if ctx.buildType != "" {
ctx.logger.V(0).Infof("Detected build type: %q", ctx.buildType)
}
}
if ctx.buildType == "url" {
ctx.logger.V(0).Infof("Building using URL: %q", ctx.kubeParam)
builder, err := kube.NewURLBuilder(ctx.logger, ctx.kubeParam)
if err != nil {
return err
}
ctx.builder = builder
}
if ctx.buildType == "file" {
ctx.logger.V(0).Infof("Building using local file: %q", ctx.kubeParam)
if info, err := os.Stat(ctx.kubeParam); err == nil && info.Mode().IsRegular() {
builder, err := kube.NewTarballBuilder(ctx.logger, ctx.kubeParam)
if err != nil {
return err
}
ctx.builder = builder
}
}
if ctx.buildType == "release" {
ctx.logger.V(0).Infof("Building using release %q artifacts", ctx.kubeParam)
kubever, err := version.ParseSemantic(ctx.kubeParam)
if err == nil {
builder, err := kube.NewReleaseBuilder(ctx.logger, "v"+kubever.String(), ctx.arch)
if err != nil {
return err
}
ctx.builder = builder
} else {
if _, err := os.Stat(ctx.kubeParam); err != nil {
ctx.logger.V(0).Infof("%s is not a valid kubernetes version", ctx.kubeParam)
return fmt.Errorf("%s is not a valid kubernetes version", ctx.kubeParam)
}
}
}
if ctx.builder == nil {
// locate sources if no kubernetes source was specified
if ctx.kubeParam == "" {
kubeRoot, err := kube.FindSource()
if err != nil {
return errors.Wrap(err, "error finding kuberoot")
}
ctx.kubeParam = kubeRoot
}
ctx.logger.V(0).Infof("Building using source: %q", ctx.kubeParam)
// initialize bits
builder, err := kube.NewDockerBuilder(ctx.logger, ctx.kubeParam, ctx.arch)
if err != nil {
return err
}
ctx.builder = builder
}
// do the actual build
return ctx.Build()
}
// detectBuildType detect the type of build required based on the param passed in the following order
// url: if the param is a valid http or https url
// file: if the param refers to an existing regular file
// source: if the param refers to an existing directory
// release: if the param is a semantic version expression (does this require the v preprended?
func detectBuildType(param string) string {
u, err := url.ParseRequestURI(param)
if err == nil {
if u.Scheme == "http" || u.Scheme == "https" {
return "url"
}
}
if info, err := os.Stat(param); err == nil {
if info.Mode().IsRegular() {
return "file"
}
if info.Mode().IsDir() {
return "source"
}
}
_, err = version.ParseSemantic(param)
if err == nil {
return "release"
}
return ""
}
func supportedArch(arch string) bool {
switch arch {
default:
return false
// currently we nominally support building node images for these
case "amd64":
case "arm64":
}
return true
}
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