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libmachine.go
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libmachine.go
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package libmachine
import (
"fmt"
"path/filepath"
"io"
"github.com/docker/machine/drivers/errdriver"
"github.com/docker/machine/libmachine/auth"
"github.com/docker/machine/libmachine/cert"
"github.com/docker/machine/libmachine/check"
"github.com/docker/machine/libmachine/drivers"
"github.com/docker/machine/libmachine/drivers/plugin/localbinary"
"github.com/docker/machine/libmachine/drivers/rpc"
"github.com/docker/machine/libmachine/engine"
"github.com/docker/machine/libmachine/host"
"github.com/docker/machine/libmachine/log"
"github.com/docker/machine/libmachine/mcnerror"
"github.com/docker/machine/libmachine/mcnutils"
"github.com/docker/machine/libmachine/persist"
"github.com/docker/machine/libmachine/provision"
"github.com/docker/machine/libmachine/ssh"
"github.com/docker/machine/libmachine/state"
"github.com/docker/machine/libmachine/swarm"
"github.com/docker/machine/libmachine/version"
)
type API interface {
io.Closer
NewHost(driverName string, rawDriver []byte) (*host.Host, error)
Create(h *host.Host) error
persist.Store
GetMachinesDir() string
}
type Client struct {
certsDir string
IsDebug bool
SSHClientType ssh.ClientType
GithubAPIToken string
*persist.Filestore
clientDriverFactory rpcdriver.RPCClientDriverFactory
}
func NewClient(storePath, certsDir string) *Client {
return &Client{
certsDir: certsDir,
IsDebug: false,
SSHClientType: ssh.External,
Filestore: persist.NewFilestore(storePath, certsDir, certsDir),
clientDriverFactory: rpcdriver.NewRPCClientDriverFactory(),
}
}
func (api *Client) NewHost(driverName string, rawDriver []byte) (*host.Host, error) {
driver, err := api.clientDriverFactory.NewRPCClientDriver(driverName, rawDriver)
if err != nil {
return nil, err
}
return &host.Host{
ConfigVersion: version.ConfigVersion,
Name: driver.GetMachineName(),
Driver: driver,
DriverName: driver.DriverName(),
HostOptions: &host.Options{
AuthOptions: &auth.Options{
CertDir: api.certsDir,
CaCertPath: filepath.Join(api.certsDir, "ca.pem"),
CaPrivateKeyPath: filepath.Join(api.certsDir, "ca-key.pem"),
ClientCertPath: filepath.Join(api.certsDir, "cert.pem"),
ClientKeyPath: filepath.Join(api.certsDir, "key.pem"),
ServerCertPath: filepath.Join(api.GetMachinesDir(), "server.pem"),
ServerKeyPath: filepath.Join(api.GetMachinesDir(), "server-key.pem"),
},
EngineOptions: &engine.Options{
InstallURL: drivers.DefaultEngineInstallURL,
StorageDriver: "overlay2",
TLSVerify: true,
},
SwarmOptions: &swarm.Options{
Host: "tcp://0.0.0.0:3376",
Image: "swarm:latest",
Strategy: "spread",
},
},
}, nil
}
func (api *Client) Load(name string) (*host.Host, error) {
h, err := api.Filestore.Load(name)
if err != nil {
return nil, err
}
d, err := api.clientDriverFactory.NewRPCClientDriver(h.DriverName, h.RawDriver)
if err != nil {
// Not being able to find a driver binary is a "known error"
if _, ok := err.(localbinary.ErrPluginBinaryNotFound); ok {
h.Driver = errdriver.NewDriver(h.DriverName)
return h, nil
}
return nil, err
}
if h.DriverName == "virtualbox" {
h.Driver = drivers.NewSerialDriver(d)
} else {
h.Driver = d
}
return h, nil
}
// Create is the wrapper method which covers all of the boilerplate around
// actually creating, provisioning, and persisting an instance in the store.
func (api *Client) Create(h *host.Host) error {
if err := cert.BootstrapCertificates(h.AuthOptions()); err != nil {
return fmt.Errorf("Error generating certificates: %s", err)
}
log.Info("Running pre-create checks...")
if err := h.Driver.PreCreateCheck(); err != nil {
return mcnerror.ErrDuringPreCreate{
Cause: err,
}
}
if err := api.Save(h); err != nil {
return fmt.Errorf("Error saving host to store before attempting creation: %s", err)
}
log.Info("Creating machine...")
if err := api.performCreate(h); err != nil {
return fmt.Errorf("Error creating machine: %s", err)
}
log.Debug("Reticulating splines...")
return nil
}
func (api *Client) performCreate(h *host.Host) error {
if err := h.Driver.Create(); err != nil {
return fmt.Errorf("Error in driver during machine creation: %s", err)
}
if err := api.Save(h); err != nil {
return fmt.Errorf("Error saving host to store after attempting creation: %s", err)
}
// TODO: Not really a fan of just checking "none" or "ci-test" here.
if h.Driver.DriverName() == "none" || h.Driver.DriverName() == "ci-test" {
return nil
}
log.Info("Waiting for machine to be running, this may take a few minutes...")
if err := mcnutils.WaitFor(drivers.MachineInState(h.Driver, state.Running)); err != nil {
return fmt.Errorf("Error waiting for machine to be running: %s", err)
}
log.Info("Detecting operating system of created instance...")
provisioner, err := provision.DetectProvisioner(h.Driver)
if err != nil {
return fmt.Errorf("Error detecting OS: %s", err)
}
log.Infof("Provisioning with %s...", provisioner.String())
if err := provisioner.Provision(*h.HostOptions.SwarmOptions, *h.HostOptions.AuthOptions, *h.HostOptions.EngineOptions); err != nil {
return fmt.Errorf("Error running provisioning: %s", err)
}
// We should check the connection to docker here
log.Info("Checking connection to Docker...")
if _, _, err = check.DefaultConnChecker.Check(h, false); err != nil {
return fmt.Errorf("Error checking the host: %s", err)
}
log.Info("Docker is up and running!")
return nil
}
func (api *Client) Close() error {
return api.clientDriverFactory.Close()
}