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vmware_amd64.go
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vmware_amd64.go
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// 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 vmware
import (
"io/ioutil"
"log"
"os"
"github.com/coreos/coreos-cloudinit/pkg"
"github.com/sigma/vmw-guestinfo/rpcvmx"
"github.com/sigma/vmw-guestinfo/vmcheck"
"github.com/sigma/vmw-ovflib"
)
type ovfWrapper struct {
env *ovf.OvfEnvironment
}
func (ovf ovfWrapper) readConfig(key string) (string, error) {
return ovf.env.Properties["guestinfo."+key], nil
}
func NewDatasource(fileName string) *vmware {
// read from provided ovf environment document (typically /media/ovfenv/ovf-env.xml)
if fileName != "" {
log.Printf("Using OVF environment from %s\n", fileName)
ovfEnv, err := ioutil.ReadFile(fileName)
if err != nil {
ovfEnv = make([]byte, 0)
}
return &vmware{
ovfFileName: fileName,
readConfig: getOvfReadConfig(ovfEnv),
urlDownload: urlDownload,
}
}
// try to read ovf environment from VMware tools
data, err := readConfig("ovfenv")
if err == nil && data != "" {
log.Printf("Using OVF environment from guestinfo\n")
return &vmware{
readConfig: getOvfReadConfig([]byte(data)),
urlDownload: urlDownload,
}
}
// if everything fails, fallback to directly reading variables from the backdoor
log.Printf("Using guestinfo variables\n")
return &vmware{
readConfig: readConfig,
urlDownload: urlDownload,
}
}
func (v vmware) IsAvailable() bool {
if v.ovfFileName != "" {
_, err := os.Stat(v.ovfFileName)
return !os.IsNotExist(err)
}
return vmcheck.IsVirtualWorld()
}
func readConfig(key string) (string, error) {
data, err := rpcvmx.NewConfig().String(key, "")
if err == nil {
log.Printf("Read from %q: %q\n", key, data)
} else {
log.Printf("Failed to read from %q: %v\n", key, err)
}
return data, err
}
func getOvfReadConfig(ovfEnv []byte) readConfigFunction {
env := &ovf.OvfEnvironment{}
if len(ovfEnv) != 0 {
env = ovf.ReadEnvironment(ovfEnv)
}
wrapper := ovfWrapper{env}
return wrapper.readConfig
}
func urlDownload(url string) ([]byte, error) {
client := pkg.NewHttpClient()
return client.GetRetry(url)
}