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package docker
import (
"errors"
"fmt"
"net/http"
)
// RestartPolicy represents the policy for automatically restarting a container.
//
// Possible values are:
//
// - always: the docker daemon will always restart the container
// - on-failure: the docker daemon will restart the container on failures, at
// most MaximumRetryCount times
// - unless-stopped: the docker daemon will always restart the container except
// when user has manually stopped the container
// - no: the docker daemon will not restart the container automatically
type RestartPolicy struct {
Name string `json:"Name,omitempty" yaml:"Name,omitempty" toml:"Name,omitempty"`
MaximumRetryCount int `json:"MaximumRetryCount,omitempty" yaml:"MaximumRetryCount,omitempty" toml:"MaximumRetryCount,omitempty"`
}
// AlwaysRestart returns a restart policy that tells the Docker daemon to
// always restart the container.
func AlwaysRestart() RestartPolicy {
return RestartPolicy{Name: "always"}
}
// RestartOnFailure returns a restart policy that tells the Docker daemon to
// restart the container on failures, trying at most maxRetry times.
func RestartOnFailure(maxRetry int) RestartPolicy {
return RestartPolicy{Name: "on-failure", MaximumRetryCount: maxRetry}
}
// RestartUnlessStopped returns a restart policy that tells the Docker daemon to
// always restart the container except when user has manually stopped the container.
func RestartUnlessStopped() RestartPolicy {
return RestartPolicy{Name: "unless-stopped"}
}
// NeverRestart returns a restart policy that tells the Docker daemon to never
// restart the container on failures.
func NeverRestart() RestartPolicy {
return RestartPolicy{Name: "no"}
}
// RestartContainer stops a container, killing it after the given timeout (in
// seconds), during the stop process.
//
// See https://goo.gl/MrAKQ5 for more details.
func (c *Client) RestartContainer(id string, timeout uint) error {
path := fmt.Sprintf("/containers/%s/restart?t=%d", id, timeout)
resp, err := c.do(http.MethodPost, path, doOptions{})
if err != nil {
var e *Error
if errors.As(err, &e) && e.Status == http.StatusNotFound {
return &NoSuchContainer{ID: id}
}
return err
}
resp.Body.Close()
return nil
}
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