bee3972856
Check if there is a plugin socket first under `/run/docker/plugins/NAME.sock`. If there is no socket for a plugin, check `/etc/docker/plugins/NAME.spec` and `/usr/lib/docker/plugins/NAME.spec` for spec files. Signed-off-by: David Calavera <david.calavera@gmail.com>
100 lines
2 KiB
Go
100 lines
2 KiB
Go
package plugins
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import (
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"encoding/json"
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"errors"
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"fmt"
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"io/ioutil"
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"net/url"
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"os"
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"path/filepath"
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"strings"
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)
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var (
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ErrNotFound = errors.New("Plugin not found")
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socketsPath = "/run/docker/plugins"
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specsPaths = []string{"/etc/docker/plugins", "/usr/lib/docker/plugins"}
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)
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type Registry interface {
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Plugins() ([]*Plugin, error)
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Plugin(name string) (*Plugin, error)
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}
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type LocalRegistry struct{}
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func newLocalRegistry() LocalRegistry {
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return LocalRegistry{}
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}
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func (l *LocalRegistry) Plugin(name string) (*Plugin, error) {
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socketpaths := pluginPaths(socketsPath, name, ".sock")
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for _, p := range socketpaths {
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if fi, err := os.Stat(p); err == nil && fi.Mode()&os.ModeSocket != 0 {
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return newLocalPlugin(name, "unix://"+p), nil
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}
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}
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var txtspecpaths []string
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for _, p := range specsPaths {
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txtspecpaths = append(txtspecpaths, pluginPaths(p, name, ".spec")...)
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txtspecpaths = append(txtspecpaths, pluginPaths(p, name, ".json")...)
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}
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for _, p := range txtspecpaths {
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if _, err := os.Stat(p); err == nil {
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if strings.HasSuffix(p, ".json") {
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return readPluginJSONInfo(name, p)
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}
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return readPluginInfo(name, p)
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}
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}
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return nil, ErrNotFound
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}
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func readPluginInfo(name, path string) (*Plugin, error) {
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content, err := ioutil.ReadFile(path)
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if err != nil {
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return nil, err
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}
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addr := strings.TrimSpace(string(content))
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u, err := url.Parse(addr)
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if err != nil {
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return nil, err
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}
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if len(u.Scheme) == 0 {
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return nil, fmt.Errorf("Unknown protocol")
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}
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return newLocalPlugin(name, addr), nil
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}
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func readPluginJSONInfo(name, path string) (*Plugin, error) {
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f, err := os.Open(path)
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if err != nil {
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return nil, err
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}
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defer f.Close()
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var p Plugin
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if err := json.NewDecoder(f).Decode(&p); err != nil {
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return nil, err
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}
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p.Name = name
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if len(p.TLSConfig.CAFile) == 0 {
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p.TLSConfig.InsecureSkipVerify = true
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}
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return &p, nil
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}
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func pluginPaths(base, name, ext string) []string {
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return []string{
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filepath.Join(base, name+ext),
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filepath.Join(base, name, name+ext),
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}
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}
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