139 lines
4.0 KiB
Go
139 lines
4.0 KiB
Go
/*
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Copyright 2019 the Velero contributors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package builder
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import (
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"strings"
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corev1api "k8s.io/api/core/v1"
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)
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// ContainerBuilder builds Container objects
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type ContainerBuilder struct {
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object *corev1api.Container
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}
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// ForContainer is the constructor for ContainerBuilder.
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func ForContainer(name, image string) *ContainerBuilder {
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return &ContainerBuilder{
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object: &corev1api.Container{
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Name: name,
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Image: image,
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},
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}
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}
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// ForPluginContainer is a helper builder specifically for plugin init containers
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func ForPluginContainer(image string, pullPolicy corev1api.PullPolicy) *ContainerBuilder {
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volumeMount := ForVolumeMount("plugins", "/target").Result()
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return ForContainer(getName(image), image).PullPolicy(pullPolicy).VolumeMounts(volumeMount)
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}
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// getName returns the 'name' component of a docker
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// image that includes the entire string except the registry name, and transforms the combined
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// string into a RFC-1123 compatible name.
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func getName(image string) string {
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slashIndex := strings.Index(image, "/")
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slashCount := 0
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if slashIndex >= 0 {
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slashCount = strings.Count(image[slashIndex:], "/")
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}
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start := 0
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if slashCount > 1 || slashIndex == 0 {
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// always start after the first slash when there is a registry name
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// or if the string starts with a slash.
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start = slashIndex + 1
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}
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// If the image spec is by digest, remove the digest.
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// If it is by tag, remove the tag.
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// Otherwise (implicit :latest) leave it alone.
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end := len(image)
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atIndex := strings.LastIndex(image, "@")
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if atIndex > 0 {
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end = atIndex
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} else {
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colonIndex := strings.LastIndex(image, ":")
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if colonIndex > 0 {
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end = colonIndex
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}
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}
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// https://github.com/distribution/distribution/blob/main/docs/spec/api.md#overview
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// valid repository names match the regex [a-z0-9]+(?:[._-][a-z0-9]+)*
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// image repository names can container [._] but [._] are not allowed in RFC-1123 labels.
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// replace '/', '_' and '.' with '-'
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re := strings.NewReplacer("/", "-",
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"_", "-",
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".", "-")
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return re.Replace(image[start:end])
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}
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// Result returns the built Container.
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func (b *ContainerBuilder) Result() *corev1api.Container {
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return b.object
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}
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// Args sets the container's Args.
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func (b *ContainerBuilder) Args(args ...string) *ContainerBuilder {
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b.object.Args = append(b.object.Args, args...)
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return b
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}
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// VolumeMounts sets the container's VolumeMounts.
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func (b *ContainerBuilder) VolumeMounts(volumeMounts ...*corev1api.VolumeMount) *ContainerBuilder {
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for _, v := range volumeMounts {
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b.object.VolumeMounts = append(b.object.VolumeMounts, *v)
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}
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return b
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}
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// Resources sets the container's Resources.
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func (b *ContainerBuilder) Resources(resources *corev1api.ResourceRequirements) *ContainerBuilder {
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b.object.Resources = *resources
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return b
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}
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// SecurityContext sets the container's SecurityContext.
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func (b *ContainerBuilder) SecurityContext(securityContext *corev1api.SecurityContext) *ContainerBuilder {
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b.object.SecurityContext = securityContext
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return b
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}
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func (b *ContainerBuilder) Env(vars ...*corev1api.EnvVar) *ContainerBuilder {
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for _, v := range vars {
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b.object.Env = append(b.object.Env, *v)
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}
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return b
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}
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func (b *ContainerBuilder) PullPolicy(pullPolicy corev1api.PullPolicy) *ContainerBuilder {
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b.object.ImagePullPolicy = pullPolicy
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return b
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}
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func (b *ContainerBuilder) Command(command []string) *ContainerBuilder {
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if b.object.Command == nil {
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b.object.Command = []string{}
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}
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b.object.Command = append(b.object.Command, command...)
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return b
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}
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