mirror of https://github.com/kubernetes/kops.git
76 lines
2.3 KiB
Go
76 lines
2.3 KiB
Go
/*
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Copyright 2019 The Kubernetes Authors.
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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 kubemanifest
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import (
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v1 "k8s.io/api/core/v1"
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)
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// MapEtcHosts maps the /etc/hosts file into the pod (useful for gossip DNS)
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func MapEtcHosts(pod *v1.Pod, container *v1.Container, readOnly bool) {
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mapping := AddHostPathMapping(pod, container, "hosts", "/etc/hosts").WithType(v1.HostPathFile)
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mapping.VolumeMount.ReadOnly = readOnly
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}
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// HostPathMapping allows fluent construction of a hostpath mount
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type HostPathMapping struct {
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VolumeMount *v1.VolumeMount
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Volume *v1.Volume
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}
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// AddHostPathMapping is a helper function for mapping a host path into a container
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// It returns a HostPathMapping for tweaking the defaults (which are notably read-only)
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func AddHostPathMapping(pod *v1.Pod, container *v1.Container, name, path string) *HostPathMapping {
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pod.Spec.Volumes = append(pod.Spec.Volumes, v1.Volume{
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Name: name,
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VolumeSource: v1.VolumeSource{
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HostPath: &v1.HostPathVolumeSource{
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Path: path,
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},
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},
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})
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container.VolumeMounts = append(container.VolumeMounts, v1.VolumeMount{
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Name: name,
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MountPath: path,
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ReadOnly: true,
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})
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return &HostPathMapping{
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Volume: &pod.Spec.Volumes[len(pod.Spec.Volumes)-1],
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VolumeMount: &container.VolumeMounts[len(container.VolumeMounts)-1],
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}
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}
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// WithReadWrite changes the hostpath mapping to be read-write (the default is read-only)
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func (m *HostPathMapping) WithReadWrite() *HostPathMapping {
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m.VolumeMount.ReadOnly = false
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return m
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}
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// WithType changes the hostpath mount type
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func (m *HostPathMapping) WithType(t v1.HostPathType) *HostPathMapping {
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m.Volume.VolumeSource.HostPath.Type = &t
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return m
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}
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// WithHostPath changes the hostpath path
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func (m *HostPathMapping) WithHostPath(p string) *HostPathMapping {
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m.Volume.VolumeSource.HostPath.Path = p
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return m
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}
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