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docs/libmachine/drivers/utils.go
Nathan LeClaire b5927f10c4 Make libmachine usable by outside world
- Clear out some cruft tightly coupling libmachine to filestore

- Comment out drivers other than virtualbox for now

- Change way too many things

- Mostly, break out the code to be more modular.

- Destroy all traces of "provider" in its current form.  It will be
brought back as something more sensible, instead of something which
overlaps in function with both Host and Store.

- Fix mis-managed config passthru

- Remove a few instances of state stored in env vars

- This should be explicitly communicated in Go-land, not through the
shell.

- Rename "store" module to "persist"

- This is done mostly to avoid confusion about the fact that a concrete
instance of a "Store" interface is oftentimes referred to as "store" in
the code.

- Rip out repetitive antipattern for getting store

- This replaces the previous repetive idiom for getting the cert info, and
consequently the store, with a much less repetitive idiom.

- Also, some redundant methods in commands.go for accessing hosts have
either been simplified or removed entirely.

- First steps towards fixing up tests

- Test progress continues

- Replace unit tests with integration tests

- MAKE ALL UNIT TESTS PASS YAY

- Add helper test files

- Don't write to disk in libmachine/host

- Heh.. coverage check strikes again

- Fix remove code

- Move cert code around

- Continued progress: simplify Driver

- Fixups and make creation work with new model

- Move drivers module inside of libmachine

- Move ssh module inside of libmachine

- Move state module to libmachine

- Move utils module to libmachine

- Move version module to libmachine

- Move log module to libmachine

- Modify some constructor methods around

- Change Travis build dep structure

- Boring gofmt fix

- Add version module

- Move NewHost to store

- Update some boring cert path infos to make API easier to use

- Fix up some issues around the new model

- Clean up some cert path stuff

- Don't use shady functions to get store path :D

- Continue artifact work

- Fix silly machines dir bug

- Continue fixing silly path issues

- Change up output of vbm a bit

- Continue work to make example go

- Change output a little more

- Last changes needed to make create finish properly

- Fix config.go to use libmachine

- Cut down code duplication and make both methods work with libmachine

- Add pluggable logging implementation

- Return error when machine already in desired state

- Update example to show log method

- Fix file:// bug

- Fix Swarm defaults

- Remove unused TLS settings from Engine and Swarm options

- Remove spurious error

- Correct bug detecting if migration was performed

- Fix compilation errors from tests

- Fix most of remaining test issues

- Fix final silly bug in tests

- Remove extraneous debug code

- Add -race to test command

- Appease the gofmt

- Appease the generate coverage

- Making executive decision to remove Travis coverage check

In the early days I thought this would be a good idea because it would
encourage people to write tests in case they added a new module.  Well,
in fact it has just turned into a giant nuisance and made refactoring
work like this even more difficult.

- Move Get to Load
- Move HostListItem code to CLI

Signed-off-by: Nathan LeClaire <nathan.leclaire@gmail.com>
2015-09-23 12:30:15 -07:00

92 lines
2.0 KiB
Go

package drivers
import (
"fmt"
"strings"
"github.com/docker/machine/libmachine/log"
"github.com/docker/machine/libmachine/mcnutils"
"github.com/docker/machine/libmachine/ssh"
)
const (
ErrExitCode255 = "255"
)
func GetSSHClientFromDriver(d Driver) (ssh.Client, error) {
addr, err := d.GetSSHHostname()
if err != nil {
return nil, err
}
port, err := d.GetSSHPort()
if err != nil {
return nil, err
}
auth := &ssh.Auth{
Keys: []string{d.GetSSHKeyPath()},
}
client, err := ssh.NewClient(d.GetSSHUsername(), addr, port, auth)
return client, err
}
func isErr255Exit(err error) bool {
return strings.Contains(err.Error(), ErrExitCode255)
}
func RunSSHCommandFromDriver(d Driver, command string) (string, error) {
client, err := GetSSHClientFromDriver(d)
if err != nil {
return "", err
}
log.Debugf("About to run SSH command:\n%s", command)
output, err := client.Output(command)
log.Debugf("SSH cmd err, output: %v: %s", err, output)
if err != nil && !isErr255Exit(err) {
log.Error("SSH cmd error!")
log.Errorf("command: %s", command)
log.Errorf("err : %v", err)
log.Fatalf("output : %s", output)
}
return output, err
}
func sshAvailableFunc(d Driver) func() bool {
return func() bool {
log.Debug("Getting to WaitForSSH function...")
hostname, err := d.GetSSHHostname()
if err != nil {
log.Debugf("Error getting IP address waiting for SSH: %s", err)
return false
}
port, err := d.GetSSHPort()
if err != nil {
log.Debugf("Error getting SSH port: %s", err)
return false
}
if err := ssh.WaitForTCP(fmt.Sprintf("%s:%d", hostname, port)); err != nil {
log.Debugf("Error waiting for TCP waiting for SSH: %s", err)
return false
}
if _, err := RunSSHCommandFromDriver(d, "exit 0"); err != nil {
log.Debugf("Error getting ssh command 'exit 0' : %s", err)
return false
}
return true
}
}
func WaitForSSH(d Driver) error {
if err := mcnutils.WaitFor(sshAvailableFunc(d)); err != nil {
return fmt.Errorf("Too many retries. Last error: %s", err)
}
return nil
}