123 lines
3.2 KiB
Go
123 lines
3.2 KiB
Go
// Copyright 2017 AMIS Technologies
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package container
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import (
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"context"
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"io"
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"log"
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"os"
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"time"
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"github.com/docker/docker/api/types"
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"github.com/docker/docker/api/types/container"
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"github.com/moby/moby/client"
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)
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func NewEthereum(imageName string, id string) *ethereum {
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client, err := client.NewEnvClient()
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if err != nil {
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log.Fatalf("Cannot connect to Docker daemon, err: %v", err)
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}
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return ðereum{
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id: id,
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imageName: imageName,
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client: client,
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}
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}
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type ethereum struct {
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id string
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containerID string
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imageName string
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client *client.Client
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}
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func (eth *ethereum) Start(showLog bool) error {
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_, err := eth.client.ImagePull(context.Background(), eth.imageName, types.ImagePullOptions{})
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if err != nil {
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log.Printf("Cannot pull %s, err: %v", eth.imageName, err)
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return err
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}
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resp, err := eth.client.ContainerCreate(context.Background(), &container.Config{
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Hostname: "geth-" + eth.id,
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Image: eth.imageName,
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AttachStdout: true,
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}, nil, nil, "")
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if err != nil {
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log.Printf("Failed to create container, err: %v", err)
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return err
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}
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defer func() {
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if showLog {
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go eth.showLog(context.Background())
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}
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}()
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eth.containerID = resp.ID
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return eth.client.ContainerStart(context.Background(), eth.containerID, types.ContainerStartOptions{})
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}
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func (eth *ethereum) Stop() error {
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timeout := 10 * time.Second
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err := eth.client.ContainerStop(context.Background(), eth.containerID, &timeout)
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if err != nil {
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return err
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}
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return eth.client.ContainerRemove(context.Background(), eth.containerID,
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types.ContainerRemoveOptions{
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Force: true,
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})
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}
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func (eth *ethereum) Wait(t time.Duration) error {
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ctx, cancel := context.WithTimeout(context.Background(), t)
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defer cancel()
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_, errCh := eth.client.ContainerWait(ctx, eth.containerID, "")
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return <-errCh
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}
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func (eth *ethereum) Running() bool {
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containers, err := eth.client.ContainerList(context.Background(), types.ContainerListOptions{})
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if err != nil {
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log.Printf("Failed to list containers, err: %v", err)
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return false
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}
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for _, c := range containers {
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if c.ID == eth.containerID {
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return true
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}
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}
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return false
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}
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func (eth *ethereum) showLog(context context.Context) {
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if readCloser, err := eth.client.ContainerLogs(context, eth.containerID,
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types.ContainerLogsOptions{ShowStderr: true, Follow: true}); err == nil {
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defer readCloser.Close()
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_, err = io.Copy(os.Stdout, readCloser)
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if err != nil && err != io.EOF {
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log.Fatal(err)
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}
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}
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}
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