Ġestjoni ta' kontenituri Docker f'Go

Dokumentazzjoni!

Meta tiddeċiedi li tikteb ir-rota tiegħek stess biex taqbad il-ganċijiet mid-docker hub jew mir-reġistru biex taġġorna/tħaddem awtomatikament il-kontenituri fuq is-server, tista 'ssib id-Docker Cli utli, li tgħin biex timmaniġġja d-daemon Docker fis-sistema tiegħek.

Biex taħdem ser ikollok bżonn Go verżjoni mhux inqas minn 1.9.4

Jekk għadek ma bdiltx għal moduli, installa Cli bil-kmand li ġej:

go get github.com/docker/docker/client

Tmexxi kontenitur

L-eżempju li ġej juri kif tħaddem kontenitur bl-użu tal-API Docker. Fuq il-linja tal-kmand inti tuża l-kmand docker run, iżda nistgħu faċilment ilaħħqu ma 'dan il-kompitu fis-servizz tagħna.
Dan l-eżempju huwa ekwivalenti għat-tħaddim tal-kmand docker run alpine echo hello world

package main {
    ctx := context.Background()
    cli, err := client.NewEnvClient()
    if err != nil {
        panic(err)
    }

    // Делаем docker pull
    reader, err := cli.ImagePull(ctx, "docker.io/library/alpine", types.ImagePullOptions{})
    if err != nil {
        panic(err)
    }
    io.Copy(os.Stdout, reader)

    hostBinding := nat.PortBinding{
        HostIP:   "0.0.0.0",
        HostPort: "8000",
    }
    containerPort, err := nat.NewPort("tcp", "80")
    if err != nil {
        panic("Unable to get the port")
    }
    portBinding := nat.PortMap{containerPort: []nat.PortBinding{hostBinding}}

    // Создаем контейнер с заданной конфигурацией
    resp, err := cli.ContainerCreate(ctx, &container.Config{
        Image: "alpine",
        Cmd:   []string{"echo", "hello world"},
        Tty:   true,
    }, &container.HostConfig{
        PortBindings: portBinding,
    }, nil, "")
    if err != nil {
        panic(err)
    }

    // Запускаем контейнер
    if err := cli.ContainerStart(ctx, resp.ID, types.ContainerStartOptions{}); err != nil {
        panic(err)
    }

    // Получаем логи контейнера
    out, err := cli.ContainerLogs(ctx, resp.ID, types.ContainerLogsOptions{ShowStdout: true})
    if err != nil {
        panic(err)
    }
    io.Copy(os.Stdout, out)
}

Jkollna lista ta 'kontenituri li qed jaħdmu

Dan l-eżempju huwa ekwivalenti għat-tħaddim tal-kmand docker ps

package main

import (
    "context"
    "fmt"

    "github.com/docker/docker/api/types"
    "github.com/docker/docker/client"
)

func main() {
    cli, err := client.NewEnvClient()
    if err != nil {
        panic(err)
    }

    // Получение списка запуцщенных контейнеров(docker ps)
    containers, err := cli.ContainerList(context.Background(), types.ContainerListOptions{})
    if err != nil {
        panic(err)
    }

    // Вывод всех идентификаторов контейнеров
    for _, container := range containers {
        fmt.Println(container.ID)
    }
}

Twaqqaf il-kontenituri kollha li qed jaħdmu

Ladarba tkun tgħallimt kif toħloq u tħaddem kontenituri, wasal iż-żmien li titgħallem kif timmaniġġjahom. L-eżempju li ġej se jwaqqaf il-kontenituri kollha li qed jaħdmu.

Tħaddimx dan il-kodiċi fuq server ta' produzzjoni!

package main

import (
    "context"
    "fmt"

    "github.com/docker/docker/api/types"
    "github.com/docker/docker/client"
)

func main() {
    ctx := context.Background()
    cli, err := client.NewEnvClient()
    if err != nil {
        panic(err)
    }

    // Получение списка запуцщенных контейнеров(docker ps)
    containers, err := cli.ContainerList(ctx, types.ContainerListOptions{})
    if err != nil {
        panic(err)
    }

    for _, c := range containers {
        fmt.Print("Stopping container ", c.ID[:10], "... ")
        if err := cli.ContainerStop(ctx, c.ID, nil); err != nil {
            panic(err)
        }
        fmt.Println("Success")
    }
}

Wiri taz-zkuk għal kontenitur wieħed

Tista 'taħdem ma' kontenituri individwali. L-eżempju li ġej juri zkuk tal-kontenituri bl-identifikatur speċifikat. Qabel ma tibda, trid tibdel l-ID tal-kontenitur li z-zkuk tiegħu trid tirċievi.

package main

import (
    "context"
    "io"
    "os"

    "github.com/docker/docker/api/types"
    "github.com/docker/docker/client"
)

func main() {
    ctx := context.Background()
    cli, err := client.NewEnvClient()
    if err != nil {
        panic(err)
    }

    options := types.ContainerLogsOptions{ShowStdout: true}
    // Измените id контейнера здесь
    out, err := cli.ContainerLogs(ctx, "f1064a8a4c82", options)
    if err != nil {
        panic(err)
    }
    io.Copy(os.Stdout, out)
}

Getting lista ta 'immaġini

Dan l-eżempju huwa ekwivalenti għat-tħaddim tal-kmand docker image ls

package main

import (
    "context"
    "fmt"

    "github.com/docker/docker/api/types"
    "github.com/docker/docker/client"
)

func main() {
    cli, err := client.NewEnvClient()
    if err != nil {
        panic(err)
    }

    // Получение списка образов
    images, err := cli.ImageList(context.Background(), types.ImageListOptions{})
    if err != nil {
        panic(err)
    }

    for _, image := range images {
        fmt.Println(image.ID)
    }
}

Iġbed

Dan l-eżempju huwa ekwivalenti għat-tħaddim tal-kmand docker pull

package main

import (
    "context"
    "io"
    "os"

    "github.com/docker/docker/api/types"
    "github.com/docker/docker/client"
)

func main() {
    ctx := context.Background()
    cli, err := client.NewEnvClient()
    if err != nil {
        panic(err)
    }

    // docker pull alpine
    out, err := cli.ImagePull(ctx, "docker.io/library/alpine", types.ImagePullOptions{})
    if err != nil {
        panic(err)
    }
    defer out.Close()
    io.Copy(os.Stdout, out)
}

Tniżżil ta' immaġni bl-awtentikazzjoni tal-utent

Dan l-eżempju huwa ekwivalenti għat-tħaddim tal-kmand docker pull, bl-awtentikazzjoni.

Id-dejta tal-awtentikazzjoni tintbagħat f'test ċar. Ir-reġistru uffiċjali tad-docker juża HTTPS,
reġistri privati ​​jridu jiġu kkonfigurati wkoll biex jittrasferixxu data bl-użu ta' HTTPS.

package main

import (
    "context"
    "encoding/base64"
    "encoding/json"
    "io"
    "os"

    "github.com/docker/docker/api/types"
    "github.com/docker/docker/client"
)

func main() {
    ctx := context.Background()
    cli, err := client.NewEnvClient()
    if err != nil {
        panic(err)
    }

    // Создание конфига с данными для аутентификации
    authConfig := types.AuthConfig{
        Username: "username",
        Password: "password",
    }
    encodedJSON, err := json.Marshal(authConfig)
    if err != nil {
        panic(err)
    }
    authStr := base64.URLEncoding.EncodeToString(encodedJSON)

    out, err := cli.ImagePull(ctx, "docker.io/library/alpine", types.ImagePullOptions{RegistryAuth: authStr})
    if err != nil {
        panic(err)
    }

    defer out.Close()
    io.Copy(os.Stdout, out)
}

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