/
preparer.go
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/
preparer.go
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// Copyright © 2016 Asteris, LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// +build !solaris
package image
import (
"time"
"github.com/asteris-llc/converge/load/registry"
"github.com/asteris-llc/converge/resource"
"github.com/asteris-llc/converge/resource/docker"
"golang.org/x/net/context"
)
// Preparer for docker images
//
// Image is responsible for pulling Docker images. It assumes that there is
// already a Docker daemon running on the system.
// *Note: docker resources are not currently supported on Solaris.*
type Preparer struct {
// name of the image to pull
Name string `hcl:"name" required:"true" nonempty:"true"`
// tag of the image to pull. default: latest
Tag string `hcl:"tag"`
// the amount of time to wait after a period of inactivity. The timeout is
// reset each time new data arrives.
InactivityTimeout time.Duration `hcl:"inactivity_timeout"`
}
// Prepare a new docker image
func (p *Preparer) Prepare(ctx context.Context, render resource.Renderer) (resource.Task, error) {
dockerClient, err := docker.NewDockerClient()
if err != nil {
return nil, err
}
dockerClient.PullInactivityTimeout = p.InactivityTimeout
image := &Image{
Name: p.Name,
Tag: p.Tag,
}
image.SetClient(dockerClient)
return image, nil
}
func init() {
registry.Register("docker.image", (*Preparer)(nil), (*Image)(nil))
}