mirror of https://github.com/docker/cli.git
67 lines
1.3 KiB
Go
67 lines
1.3 KiB
Go
package containerized
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import (
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"encoding/json"
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"io/ioutil"
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"os"
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"path/filepath"
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)
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var (
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proxydir = "/etc/containerd-proxy"
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)
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type proxyConfig struct {
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ID string `json:"-"`
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Namespace string `json:"namespace"`
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Image string `json:"image"`
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ImagePath string `json:"imagePath"`
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Args []string `json:"args"`
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Scope string `json:"scope"`
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}
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func updateConfig(name, newImage string) error {
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cfg, err := loadConfig(name)
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if err != nil && os.IsNotExist(err) {
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return nil
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}
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if err != nil {
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return err
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}
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cfg.Image = newImage
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cfg.ImagePath = ""
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return storeConfig(name, cfg)
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}
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func loadConfig(name string) (*proxyConfig, error) {
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configFile := filepath.Join(proxydir, name+".json")
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data, err := ioutil.ReadFile(configFile)
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if err != nil {
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return nil, err
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}
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var cfg proxyConfig
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err = json.Unmarshal(data, &cfg)
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if err != nil {
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return nil, err
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}
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return &cfg, nil
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}
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// storeConfig will write out the config only if it already exists
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func storeConfig(name string, cfg *proxyConfig) error {
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configFile := filepath.Join(proxydir, name+".json")
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fd, err := os.OpenFile(configFile, os.O_RDWR, 0644)
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if err != nil && os.IsNotExist(err) {
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return nil
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}
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if err != nil {
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return err
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}
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err = fd.Truncate(0)
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if err != nil {
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return err
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}
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enc := json.NewEncoder(fd)
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return enc.Encode(cfg)
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}
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