forked from canonical/lxd
/
remote.go
318 lines (259 loc) · 7.09 KB
/
remote.go
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package config
import (
"crypto/x509"
"encoding/pem"
"fmt"
"io/ioutil"
"net/url"
"os"
"runtime"
"strings"
"github.com/juju/persistent-cookiejar"
schemaform "gopkg.in/juju/environschema.v1/form"
"gopkg.in/macaroon-bakery.v2/httpbakery"
"gopkg.in/macaroon-bakery.v2/httpbakery/form"
"github.com/lxc/lxd/client"
"github.com/lxc/lxd/shared"
)
// Remote holds details for communication with a remote daemon
type Remote struct {
Addr string `yaml:"addr"`
AuthType string `yaml:"auth_type,omitempty"`
Domain string `yaml:"domain,omitempty"`
Project string `yaml:"project,omitempty"`
Protocol string `yaml:"protocol,omitempty"`
Public bool `yaml:"public"`
Global bool `yaml:"-"`
Static bool `yaml:"-"`
}
// ParseRemote splits remote and object
func (c *Config) ParseRemote(raw string) (string, string, error) {
result := strings.SplitN(raw, ":", 2)
if len(result) == 1 {
return c.DefaultRemote, raw, nil
}
_, ok := c.Remotes[result[0]]
if !ok {
// Attempt to play nice with snapshots containing ":"
if shared.IsSnapshot(raw) && shared.IsSnapshot(result[0]) {
return c.DefaultRemote, raw, nil
}
return "", "", fmt.Errorf("The remote \"%s\" doesn't exist", result[0])
}
return result[0], result[1], nil
}
// GetInstanceServer returns a InstanceServer struct for the remote
func (c *Config) GetInstanceServer(name string) (lxd.InstanceServer, error) {
// Handle "local" on non-Linux
if name == "local" && runtime.GOOS != "linux" {
return nil, ErrNotLinux
}
// Get the remote
remote, ok := c.Remotes[name]
if !ok {
return nil, fmt.Errorf("The remote \"%s\" doesn't exist", name)
}
// Quick checks.
if remote.Public || remote.Protocol == "simplestreams" {
return nil, fmt.Errorf("The remote isn't a private LXD server")
}
// Get connection arguments
args, err := c.getConnectionArgs(name)
if err != nil {
return nil, err
}
// Unix socket
if strings.HasPrefix(remote.Addr, "unix:") {
d, err := lxd.ConnectLXDUnix(strings.TrimPrefix(strings.TrimPrefix(remote.Addr, "unix:"), "//"), args)
if err != nil {
return nil, err
}
if remote.Project != "" && remote.Project != "default" {
d = d.UseProject(remote.Project)
}
if c.ProjectOverride != "" {
d = d.UseProject(c.ProjectOverride)
}
return d, nil
}
// HTTPs
if remote.AuthType != "candid" && (args.TLSClientCert == "" || args.TLSClientKey == "") {
return nil, fmt.Errorf("Missing TLS client certificate and key")
}
d, err := lxd.ConnectLXD(remote.Addr, args)
if err != nil {
return nil, err
}
if remote.Project != "" && remote.Project != "default" {
d = d.UseProject(remote.Project)
}
if c.ProjectOverride != "" {
d = d.UseProject(c.ProjectOverride)
}
return d, nil
}
// GetImageServer returns a ImageServer struct for the remote
func (c *Config) GetImageServer(name string) (lxd.ImageServer, error) {
// Handle "local" on non-Linux
if name == "local" && runtime.GOOS != "linux" {
return nil, ErrNotLinux
}
// Get the remote
remote, ok := c.Remotes[name]
if !ok {
return nil, fmt.Errorf("The remote \"%s\" doesn't exist", name)
}
// Get connection arguments
args, err := c.getConnectionArgs(name)
if err != nil {
return nil, err
}
// Unix socket
if strings.HasPrefix(remote.Addr, "unix:") {
d, err := lxd.ConnectLXDUnix(strings.TrimPrefix(strings.TrimPrefix(remote.Addr, "unix:"), "//"), args)
if err != nil {
return nil, err
}
if remote.Project != "" && remote.Project != "default" {
d = d.UseProject(remote.Project)
}
if c.ProjectOverride != "" {
d = d.UseProject(c.ProjectOverride)
}
return d, nil
}
// HTTPs (simplestreams)
if remote.Protocol == "simplestreams" {
d, err := lxd.ConnectSimpleStreams(remote.Addr, args)
if err != nil {
return nil, err
}
return d, nil
}
// HTTPs (public LXD)
if remote.Public {
d, err := lxd.ConnectPublicLXD(remote.Addr, args)
if err != nil {
return nil, err
}
return d, nil
}
// HTTPs (private LXD)
d, err := lxd.ConnectLXD(remote.Addr, args)
if err != nil {
return nil, err
}
if remote.Project != "" && remote.Project != "default" {
d = d.UseProject(remote.Project)
}
if c.ProjectOverride != "" {
d = d.UseProject(c.ProjectOverride)
}
return d, nil
}
func (c *Config) getConnectionArgs(name string) (*lxd.ConnectionArgs, error) {
remote, _ := c.Remotes[name]
args := lxd.ConnectionArgs{
UserAgent: c.UserAgent,
AuthType: remote.AuthType,
}
if args.AuthType == "candid" {
args.AuthInteractor = []httpbakery.Interactor{
form.Interactor{Filler: schemaform.IOFiller{}},
httpbakery.WebBrowserInteractor{
OpenWebBrowser: func(uri *url.URL) error {
if remote.Domain != "" {
query := uri.Query()
query.Set("domain", remote.Domain)
uri.RawQuery = query.Encode()
}
return httpbakery.OpenWebBrowser(uri)
},
},
}
if c.cookieJars == nil || c.cookieJars[name] == nil {
if !shared.PathExists(c.ConfigPath("jars")) {
err := os.MkdirAll(c.ConfigPath("jars"), 0700)
if err != nil {
return nil, err
}
}
if !shared.PathExists(c.CookiesPath(name)) {
if shared.PathExists(c.ConfigPath("cookies")) {
err := shared.FileCopy(c.ConfigPath("cookies"), c.CookiesPath(name))
if err != nil {
return nil, err
}
}
}
jar, err := cookiejar.New(
&cookiejar.Options{
Filename: c.CookiesPath(name),
})
if err != nil {
return nil, err
}
if c.cookieJars == nil {
c.cookieJars = map[string]*cookiejar.Jar{}
}
c.cookieJars[name] = jar
}
args.CookieJar = c.cookieJars[name]
}
// Stop here if no TLS involved
if strings.HasPrefix(remote.Addr, "unix:") {
return &args, nil
}
// Server certificate
if shared.PathExists(c.ServerCertPath(name)) {
content, err := ioutil.ReadFile(c.ServerCertPath(name))
if err != nil {
return nil, err
}
args.TLSServerCert = string(content)
}
// Stop here if no client certificate involved
if remote.Protocol == "simplestreams" || remote.AuthType == "candid" {
return &args, nil
}
// Client certificate
if shared.PathExists(c.ConfigPath("client.crt")) {
content, err := ioutil.ReadFile(c.ConfigPath("client.crt"))
if err != nil {
return nil, err
}
args.TLSClientCert = string(content)
}
// Client CA
if shared.PathExists(c.ConfigPath("client.ca")) {
content, err := ioutil.ReadFile(c.ConfigPath("client.ca"))
if err != nil {
return nil, err
}
args.TLSCA = string(content)
}
// Client key
if shared.PathExists(c.ConfigPath("client.key")) {
content, err := ioutil.ReadFile(c.ConfigPath("client.key"))
if err != nil {
return nil, err
}
pemKey, _ := pem.Decode(content)
if x509.IsEncryptedPEMBlock(pemKey) {
if c.PromptPassword == nil {
return nil, fmt.Errorf("Private key is password protected and no helper was configured")
}
password, err := c.PromptPassword("client.crt")
if err != nil {
return nil, err
}
derKey, err := x509.DecryptPEMBlock(pemKey, []byte(password))
if err != nil {
return nil, err
}
content = pem.EncodeToMemory(&pem.Block{Type: "RSA PRIVATE KEY", Bytes: derKey})
}
args.TLSClientKey = string(content)
}
return &args, nil
}