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controller: use unique files per buildx version

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This ensures that we should never accidentally connect to a server with
a mismatched version, while also allowing us to run multiple buildx
servers at a time.

Signed-off-by: Justin Chadwell <me@jedevc.com>
This commit is contained in:
Justin Chadwell 2023-02-10 14:24:55 +00:00
parent d0d29168a5
commit ed9ea2476d
1 changed files with 29 additions and 23 deletions
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52
controller/remote/controller.go
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@ -35,6 +35,12 @@ const (
serveCommandName = "_INTERNAL_SERVE"
)
var (
defaultLogFilename = fmt.Sprintf("buildx.%s.log", version.Revision)
defaultSocketFilename = fmt.Sprintf("buildx.%s.sock", version.Revision)
defaultPIDFilename = fmt.Sprintf("buildx.%s.pid", version.Revision)
)
type serverConfig struct {
// Specify buildx server root
Root string `toml:"root"`
@ -55,7 +61,7 @@ func NewRemoteBuildxController(ctx context.Context, dockerCli command.Cli, opts
// connect to buildx server if it is already running
ctx2, cancel := context.WithTimeout(ctx, 1*time.Second)
c, err := newBuildxClientAndCheck(ctx2, filepath.Join(serverRoot, "buildx.sock"))
c, err := newBuildxClientAndCheck(ctx2, filepath.Join(serverRoot, defaultSocketFilename))
cancel()
if err != nil {
if !errors.Is(err, context.DeadlineExceeded) {
@ -66,28 +72,28 @@ func NewRemoteBuildxController(ctx context.Context, dockerCli command.Cli, opts
}
// start buildx server via subcommand
logrus.Info("no buildx server found; launching...")
launchFlags := []string{}
if opts.ServerConfig != "" {
launchFlags = append(launchFlags, "--config", opts.ServerConfig)
}
logFile, err := getLogFilePath(dockerCli, opts.ServerConfig)
if err != nil {
return nil, err
}
wait, err := launch(ctx, logFile, append([]string{serveCommandName}, launchFlags...)...)
if err != nil {
return nil, err
}
go wait()
logrus.Info("no buildx server found; launching...")
launchFlags := []string{}
if opts.ServerConfig != "" {
launchFlags = append(launchFlags, "--config", opts.ServerConfig)
}
logFile, err := getLogFilePath(dockerCli, opts.ServerConfig)
if err != nil {
return nil, err
}
wait, err := launch(ctx, logFile, append([]string{serveCommandName}, launchFlags...)...)
if err != nil {
return nil, err
}
go wait()
// wait for buildx server to be ready
ctx2, cancel = context.WithTimeout(ctx, 10*time.Second)
c, err = newBuildxClientAndCheck(ctx2, filepath.Join(serverRoot, "buildx.sock"))
c, err = newBuildxClientAndCheck(ctx2, filepath.Join(serverRoot, defaultSocketFilename))
cancel()
if err != nil {
return nil, errors.Wrap(err, "cannot connect to the buildx server")
}
if err != nil {
return nil, errors.Wrap(err, "cannot connect to the buildx server")
}
return &buildxController{c, serverRoot}, nil
}
@ -124,7 +130,7 @@ func serveCmd(dockerCli command.Cli) *cobra.Command {
if err != nil {
return err
}
pidF := filepath.Join(root, "pid")
pidF := filepath.Join(root, defaultPIDFilename)
if err := os.WriteFile(pidF, []byte(fmt.Sprintf("%d", os.Getpid())), 0600); err != nil {
return err
}
@ -141,7 +147,7 @@ func serveCmd(dockerCli command.Cli) *cobra.Command {
defer b.Close()
// serve server
addr := filepath.Join(root, "buildx.sock")
addr := filepath.Join(root, defaultSocketFilename)
if err := os.Remove(addr); err != nil && !os.IsNotExist(err) { // avoid EADDRINUSE
return err
}
@ -199,7 +205,7 @@ func getLogFilePath(dockerCli command.Cli, configPath string) (string, error) {
if err != nil {
return "", err
}
return filepath.Join(root, "log"), nil
return filepath.Join(root, defaultLogFilename), nil
}
return config.LogFile, nil
}
@ -267,7 +273,7 @@ type buildxController struct {
}
func (c *buildxController) Kill(ctx context.Context) error {
pidB, err := os.ReadFile(filepath.Join(c.serverRoot, "pid"))
pidB, err := os.ReadFile(filepath.Join(c.serverRoot, defaultPIDFilename))
if err != nil {
return err
}