/
docker.go
172 lines (151 loc) · 3.54 KB
/
docker.go
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package docker
import (
"context"
"encoding/json"
"fmt"
"io"
"log"
"net"
"sort"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/network"
"github.com/docker/docker/client"
"github.com/matematik7/didcj/models"
"github.com/matematik7/didcj/utils"
"github.com/pkg/errors"
)
type Docker struct {
cli *client.Client
ctx context.Context
image string
}
func New() *Docker {
return &Docker{
image: "matematik7/didcj",
}
}
func (docker *Docker) Init() error {
cli, err := client.NewEnvClient()
if err != nil {
return err
}
docker.cli = cli
docker.ctx = context.Background()
return nil
}
func (docker *Docker) Start(n int) error {
filters, err := filters.ParseFlag(fmt.Sprintf("reference=%s", docker.image), filters.NewArgs())
if err != nil {
return errors.Wrap(err, "could not parse image filter params")
}
imgs, err := docker.cli.ImageList(docker.ctx, types.ImageListOptions{
Filters: filters,
})
if err != nil {
return errors.Wrap(err, "could not list images")
}
if len(imgs) <= 0 {
reader, err := docker.cli.ImagePull(docker.ctx, docker.image, types.ImagePullOptions{})
if err != nil {
return errors.Wrap(err, "could not pull image")
}
err = docker.handleOutput(reader)
if err != nil {
return errors.Wrap(err, "could not handle output pull image")
}
}
config := &container.Config{
Image: docker.image,
Labels: make(map[string]string),
}
config.Labels["didcj"] = "didcj"
hostConfig := &container.HostConfig{}
networkingConfig := &network.NetworkingConfig{}
for i := 0; i < n; i++ {
name := utils.GetName(i)
container, err := docker.cli.ContainerCreate(
docker.ctx,
config,
hostConfig,
networkingConfig,
name,
)
if err != nil {
return err
}
err = docker.cli.ContainerStart(
docker.ctx,
container.ID,
types.ContainerStartOptions{},
)
if err != nil {
return err
}
log.Println("Started", name)
}
return nil
}
func (docker *Docker) Stop() error {
args := filters.NewArgs()
args.Add("label", "didcj=didcj")
containers, err := docker.cli.ContainerList(docker.ctx, types.ContainerListOptions{
All: true,
Filters: args,
})
if err != nil {
return err
}
for _, container := range containers {
err = docker.cli.ContainerRemove(
docker.ctx,
container.ID,
types.ContainerRemoveOptions{Force: true},
)
if err != nil {
return err
}
fmt.Println("Removed", container.Names[0])
}
return nil
}
func (docker *Docker) Get() ([]*models.Server, error) {
args := filters.NewArgs()
args.Add("label", "didcj=didcj")
containers, err := docker.cli.ContainerList(docker.ctx, types.ContainerListOptions{
All: true,
Filters: args,
})
if err != nil {
return nil, err
}
servers := make([]*models.Server, 0, len(containers))
for _, container := range containers {
servers = append(servers, &models.Server{
Name: container.Names[0],
IP: net.ParseIP(container.NetworkSettings.Networks["bridge"].IPAddress),
PrivateIP: net.ParseIP(container.NetworkSettings.Networks["bridge"].IPAddress),
Username: "root",
})
}
sort.Sort(models.ServerByName(servers))
return servers, nil
}
func (docker *Docker) handleOutput(reader io.ReadCloser) error {
defer reader.Close()
status := &struct {
Status string `json:"status"`
}{}
decoder := json.NewDecoder(reader)
for {
err := decoder.Decode(status)
if err == io.EOF {
break
} else if err != nil {
return err
}
log.Println(status.Status)
}
return nil
}