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metadata: Simplify the GCP SSH code

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Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
This commit is contained in:
Rolf Neugebauer 2017-04-12 16:19:24 +01:00
parent 45c2921c7c
commit 105cb48ad6
1 changed files with 35 additions and 27 deletions
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62
pkg/metadata/provider_gcp.go
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@ -48,35 +48,10 @@ func (p *ProviderGCP) Extract() ([]byte, error) {
return nil, fmt.Errorf("GCP: Failed to write hostname: %s", err) return nil, fmt.Errorf("GCP: Failed to write hostname: %s", err)
} }
// SSH keys: if err := p.handleSSH(); err != nil {
// TODO also retrieve the instance keys and respect block log.Printf("GCP: Failed to get ssh data: %s", err)
// project keys see:
// https://cloud.google.com/compute/docs/instances/ssh-keys
// The keys have usernames attached, but as a simplification
// we are going to add them all to one root file
// TODO split them into individual user files and make the ssh
// container construct those users
sshKeys, err := gcpGet(project + "attributes/sshKeys")
if err == nil {
if err := os.Mkdir(path.Join(ConfigPath, SSH), 0755); err != nil {
log.Printf("Failed to create %s: %s", SSH, err)
goto ErrorSSH
}
rootKeys := ""
for _, line := range strings.Split(string(sshKeys), "\n") {
parts := strings.SplitN(line, ":", 2)
// ignoring username for now
if len(parts) == 2 {
rootKeys = rootKeys + parts[1] + "\n"
}
}
err = ioutil.WriteFile(path.Join(ConfigPath, SSH, "authorized_keys"), []byte(rootKeys), 0600)
if err != nil {
log.Printf("GCP: Failed to write ssh keys: %s", err)
}
} }
ErrorSSH:
// Generic userdata // Generic userdata
userData, err := gcpGet(instance + "attributes/userdata") userData, err := gcpGet(instance + "attributes/userdata")
if err != nil { if err != nil {
@ -112,3 +87,36 @@ func gcpGet(url string) ([]byte, error) {
} }
return body, nil return body, nil
} }
// SSH keys:
// TODO also retrieve the instance keys and respect block
// project keys see:
// https://cloud.google.com/compute/docs/instances/ssh-keys
// The keys have usernames attached, but as a simplification
// we are going to add them all to one root file
// TODO split them into individual user files and make the ssh
// container construct those users
func (p *ProviderGCP) handleSSH() error {
sshKeys, err := gcpGet(project + "attributes/sshKeys")
if err != nil {
return fmt.Errorf("Failed to get sshKeys: %s", err)
}
if err := os.Mkdir(path.Join(ConfigPath, SSH), 0755); err != nil {
return fmt.Errorf("Failed to create %s: %s", SSH, err)
}
rootKeys := ""
for _, line := range strings.Split(string(sshKeys), "\n") {
parts := strings.SplitN(line, ":", 2)
// ignoring username for now
if len(parts) == 2 {
rootKeys = rootKeys + parts[1] + "\n"
}
}
err = ioutil.WriteFile(path.Join(ConfigPath, SSH, "authorized_keys"), []byte(rootKeys), 0600)
if err != nil {
return fmt.Errorf("Failed to write ssh keys: %s", err)
}
return nil
}