b949697a9c
This adds nvidia gpu support via the libnvidia-container project and `nvidia-container-cli`. Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
137 lines
2.8 KiB
Go
137 lines
2.8 KiB
Go
/*
|
|
Copyright The containerd 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 command
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/json"
|
|
"io"
|
|
"os"
|
|
"path/filepath"
|
|
"syscall"
|
|
"text/template"
|
|
|
|
specs "github.com/opencontainers/runtime-spec/specs-go"
|
|
"github.com/urfave/cli"
|
|
)
|
|
|
|
var ociHook = cli.Command{
|
|
Name: "oci-hook",
|
|
Usage: "provides a base for OCI runtime hooks to allow arguments to be injected.",
|
|
Action: func(context *cli.Context) error {
|
|
state, err := loadHookState(os.Stdin)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
var (
|
|
ctx = newTemplateContext(state)
|
|
args = []string(context.Args())
|
|
env = os.Environ()
|
|
)
|
|
if err := newList(&args).render(ctx); err != nil {
|
|
return err
|
|
}
|
|
if err := newList(&env).render(ctx); err != nil {
|
|
return err
|
|
}
|
|
return syscall.Exec(args[0], args, env)
|
|
},
|
|
}
|
|
|
|
func loadHookState(r io.Reader) (*specs.State, error) {
|
|
var s specs.State
|
|
if err := json.NewDecoder(r).Decode(&s); err != nil {
|
|
return nil, err
|
|
}
|
|
return &s, nil
|
|
}
|
|
|
|
func newTemplateContext(state *specs.State) *templateContext {
|
|
t := &templateContext{
|
|
state: state,
|
|
}
|
|
t.funcs = template.FuncMap{
|
|
"id": t.id,
|
|
"bundle": t.bundle,
|
|
"rootfs": t.rootfs,
|
|
"pid": t.pid,
|
|
"annotation": t.annotation,
|
|
"status": t.status,
|
|
}
|
|
return t
|
|
}
|
|
|
|
type templateContext struct {
|
|
state *specs.State
|
|
funcs template.FuncMap
|
|
}
|
|
|
|
func (t *templateContext) id() string {
|
|
return t.state.ID
|
|
}
|
|
|
|
func (t *templateContext) bundle() string {
|
|
return t.state.Bundle
|
|
}
|
|
|
|
func (t *templateContext) rootfs() string {
|
|
return filepath.Join(t.state.Bundle, "rootfs")
|
|
}
|
|
|
|
func (t *templateContext) pid() int {
|
|
return t.state.Pid
|
|
}
|
|
|
|
func (t *templateContext) annotation(k string) string {
|
|
return t.state.Annotations[k]
|
|
}
|
|
|
|
func (t *templateContext) status() string {
|
|
return t.state.Status
|
|
}
|
|
|
|
func render(ctx *templateContext, source string, out io.Writer) error {
|
|
t, err := template.New("oci-hook").Funcs(ctx.funcs).Parse(source)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return t.Execute(out, ctx)
|
|
}
|
|
|
|
func newList(l *[]string) *templateList {
|
|
return &templateList{
|
|
l: l,
|
|
}
|
|
}
|
|
|
|
type templateList struct {
|
|
l *[]string
|
|
}
|
|
|
|
func (l *templateList) render(ctx *templateContext) error {
|
|
buf := bytes.NewBuffer(nil)
|
|
for i, s := range *l.l {
|
|
buf.Reset()
|
|
if err := render(ctx, s, buf); err != nil {
|
|
return err
|
|
}
|
|
(*l.l)[i] = buf.String()
|
|
}
|
|
buf.Reset()
|
|
return nil
|
|
}
|