111 lines
2.3 KiB
Go
111 lines
2.3 KiB
Go
// Copyright 2015 CoreOS, Inc.
|
|
//
|
|
// 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 proc_cmdline
|
|
|
|
import (
|
|
"errors"
|
|
"io/ioutil"
|
|
"log"
|
|
"strings"
|
|
|
|
"github.com/vtolstov/cloudinit/datasource"
|
|
"github.com/vtolstov/cloudinit/pkg"
|
|
)
|
|
|
|
const (
|
|
ProcCmdlineLocation = "/proc/cmdline"
|
|
ProcCmdlineCloudConfigFlag = "cloud-config-url"
|
|
)
|
|
|
|
type procCmdline struct {
|
|
Location string
|
|
}
|
|
|
|
func NewDatasource() *procCmdline {
|
|
return &procCmdline{Location: ProcCmdlineLocation}
|
|
}
|
|
|
|
func (c *procCmdline) IsAvailable() bool {
|
|
contents, err := ioutil.ReadFile(c.Location)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
|
|
cmdline := strings.TrimSpace(string(contents))
|
|
_, err = findCloudConfigURL(cmdline)
|
|
return (err == nil)
|
|
}
|
|
|
|
func (c *procCmdline) AvailabilityChanges() bool {
|
|
return false
|
|
}
|
|
|
|
func (c *procCmdline) ConfigRoot() string {
|
|
return ""
|
|
}
|
|
|
|
func (c *procCmdline) FetchMetadata() (datasource.Metadata, error) {
|
|
return datasource.Metadata{}, nil
|
|
}
|
|
|
|
func (c *procCmdline) FetchUserdata() ([]byte, error) {
|
|
contents, err := ioutil.ReadFile(c.Location)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
cmdline := strings.TrimSpace(string(contents))
|
|
url, err := findCloudConfigURL(cmdline)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
client := pkg.NewHttpClient()
|
|
cfg, err := client.GetRetry(url)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return cfg, nil
|
|
}
|
|
|
|
func (c *procCmdline) Type() string {
|
|
return "proc-cmdline"
|
|
}
|
|
|
|
func findCloudConfigURL(input string) (url string, err error) {
|
|
err = errors.New("cloud-config-url not found")
|
|
for _, token := range strings.Split(input, " ") {
|
|
parts := strings.SplitN(token, "=", 2)
|
|
|
|
key := parts[0]
|
|
key = strings.Replace(key, "_", "-", -1)
|
|
|
|
if key != "cloud-config-url" {
|
|
continue
|
|
}
|
|
|
|
if len(parts) != 2 {
|
|
log.Printf("Found cloud-config-url in /proc/cmdline with no value, ignoring.")
|
|
continue
|
|
}
|
|
|
|
url = parts[1]
|
|
err = nil
|
|
}
|
|
|
|
return
|
|
}
|