/
docker.go
117 lines (98 loc) · 2.41 KB
/
docker.go
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package services
import (
"bytes"
"fmt"
"io"
"log"
"strings"
"github.com/CityOfZion/neo-local/cli/logger"
"github.com/CityOfZion/neo-local/cli/stack"
"github.com/docker/docker/api/types"
"github.com/docker/docker/client"
"golang.org/x/net/context"
)
// CheckDockerRunning pings the Docker client to check that it is running.
func CheckDockerRunning(ctx context.Context, cli *client.Client) bool {
response, err := cli.Ping(ctx)
if err != nil {
return false
}
return response.APIVersion != ""
}
// PullDockerImages pulls each Docker image required for the stack
// sequentially.
func PullDockerImages(ctx context.Context, cli *client.Client) error {
log.Println("Pulling Docker images")
services, err := stack.Services()
if err != nil {
return err
}
for _, service := range services {
prefix := fmt.Sprintf("↪ %s", service.ImageName())
s := logger.NewSpinner(prefix)
s.Start()
reader, err := cli.ImagePull(
ctx, service.ImageName(), types.ImagePullOptions{},
)
if err != nil {
return fmt.Errorf(
"Error when pulling Docker image '%s': %s",
service.ImageName(),
err,
)
}
var b bytes.Buffer
_, err = io.Copy(&b, reader)
if err != nil {
return fmt.Errorf(
"Error when pulling Docker image '%s': %s",
service.ImageName(),
err,
)
}
defer reader.Close()
s.Stop()
}
return nil
}
// FetchContainerReferences finds the container ID for each service within the
// stack.
func FetchContainerReferences(ctx context.Context, cli *client.Client) (map[string]string, error) {
containerReferences := map[string]string{}
containerNames, err := stack.ServiceContainerNames()
if err != nil {
return nil, err
}
for _, containerName := range containerNames {
containerReferences[containerName] = ""
}
containers, err := cli.ContainerList(
ctx,
types.ContainerListOptions{
All: true,
},
)
if err != nil {
return nil, err
}
for _, container := range containers {
var containerServiceName string
for _, name := range container.Names {
name = strings.Replace(name, "/", "", -1)
if strings.HasPrefix(name, stack.ContainerNamePrefix) {
containerServiceName = name
break
}
}
if containerServiceName == "" {
continue
}
for _, serviceName := range containerNames {
if containerServiceName == serviceName {
containerReferences[containerServiceName] = container.ID
break
}
}
}
return containerReferences, nil
}