mirror of https://github.com/k3s-io/k3s
79 lines
2.3 KiB
Go
79 lines
2.3 KiB
Go
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/*
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Copyright 2016 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 dockershim
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import (
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"fmt"
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dockerapiversion "github.com/docker/engine-api/types/versions"
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runtimeApi "k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
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)
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// apiVersion implements kubecontainer.Version interface by implementing
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// Compare() and String(). It uses the compare function of engine-api to
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// compare docker apiversions.
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type apiVersion string
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func (v apiVersion) String() string {
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return string(v)
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}
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func (v apiVersion) Compare(other string) (int, error) {
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if dockerapiversion.LessThan(string(v), other) {
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return -1, nil
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} else if dockerapiversion.GreaterThan(string(v), other) {
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return 1, nil
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}
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return 0, nil
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}
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// generateEnvList converts KeyValue list to a list of strings, in the form of
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// '<key>=<value>', which can be understood by docker.
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func generateEnvList(envs []*runtimeApi.KeyValue) (result []string) {
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for _, env := range envs {
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result = append(result, fmt.Sprintf("%s=%s", env.GetKey(), env.GetValue()))
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}
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return
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}
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// generateMountBindings converts the mount list to a list of strings that
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// can be understood by docker.
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// Each element in the string is in the form of:
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// '<HostPath>:<ContainerPath>', or
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// '<HostPath>:<ContainerPath>:ro', if the path is read only, or
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// '<HostPath>:<ContainerPath>:Z', if the volume requires SELinux
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// relabeling and the pod provides an SELinux label
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func generateMountBindings(mounts []*runtimeApi.Mount) (result []string) {
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// TODO: resolve podHasSELinuxLabel
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for _, m := range mounts {
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bind := fmt.Sprintf("%s:%s", m.GetHostPath(), m.GetContainerPath())
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readOnly := m.GetReadonly()
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if readOnly {
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bind += ":ro"
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}
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if m.GetSelinuxRelabel() {
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if readOnly {
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bind += ",Z"
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} else {
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bind += ":Z"
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}
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}
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result = append(result, bind)
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}
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return
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}
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