forked from moby/swarmkit
/
update.go
90 lines (79 loc) · 2.11 KB
/
update.go
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package service
import (
"errors"
"fmt"
"github.com/docker/swarmkit/api"
"github.com/docker/swarmkit/cmd/swarmctl/common"
"github.com/spf13/cobra"
)
var (
updateCmd = &cobra.Command{
Use: "update <service ID>",
Short: "Update a service",
RunE: func(cmd *cobra.Command, args []string) error {
if len(args) == 0 {
return errors.New("service ID missing")
}
c, err := common.Dial(cmd)
if err != nil {
return err
}
service, err := getService(common.Context(cmd), c, args[0])
if err != nil {
return err
}
flags := cmd.Flags()
var spec *api.ServiceSpec
spec = &service.Spec
if flags.Changed("instances") {
instances, err := flags.GetUint64("instances")
if err != nil {
return err
}
switch t := spec.GetMode().(type) {
case *api.ServiceSpec_Replicated:
t.Replicated.Instances = instances
default:
return errors.New("instances has no meaning for this mode")
}
}
if len(args) > 1 {
spec.Task.GetContainer().Command = args[1:]
}
if flags.Changed("args") {
containerArgs, err := flags.GetStringSlice("args")
if err != nil {
return err
}
spec.Task.GetContainer().Args = containerArgs
}
if flags.Changed("env") {
env, err := flags.GetStringSlice("env")
if err != nil {
return err
}
spec.Task.GetContainer().Env = env
}
r, err := c.UpdateService(common.Context(cmd), &api.UpdateServiceRequest{
ServiceID: service.ID,
ServiceVersion: &service.Meta.Version,
Spec: spec,
})
if err != nil {
return err
}
fmt.Println(r.Service.ID)
return nil
},
}
)
func init() {
updateCmd.Flags().StringSlice("args", nil, "Args")
updateCmd.Flags().StringSlice("env", nil, "Env")
updateCmd.Flags().StringP("file", "f", "", "Spec to use")
// TODO(aluzzardi): This should be called `service-instances` so that every
// orchestrator can have its own flag namespace.
updateCmd.Flags().Uint64("instances", 0, "Number of instances for the service")
// TODO(vieux): This could probably be done in one step
updateCmd.Flags().Lookup("instances").DefValue = ""
}