Golang 本地或远程云服务器Docker操作
本地操作Docker
环境准备
安装 SDK
$ go get github.com/docker/docker/client
初始化客户端对象
使用如下方式直接连接本地的 Docker Daemon,不需要过多配置,直接用环境变量的参数初始化客户端即可。
// NewEnvClient 直接使用环境变量中的 DOCKER_HOST, DOCKER_TLS_VERIFY, DOCKER_CERT_PATH, DOCKER_API_VERSION 配置
c, err := client.NewEnvClient()
完整代码
开启一个MongoDB镜像容器,5s后删除该容器
package main
import (
"context"
"fmt"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/client"
"github.com/docker/go-connections/nat"
"time"
)
func main() {
c, err := client.NewEnvClient()
if err != nil {
panic(err)
}
ctx := context.Background()
resp, err := c.ContainerCreate(ctx,
&container.Config{
Image: "mongo:latest",
ExposedPorts: nat.PortSet{
"27017/tcp": {}, //要暴露的端口
},
},
&container.HostConfig{
PortBindings: nat.PortMap{
"27017/tcp": []nat.PortBinding{ //容器端口
{
HostIP: "0.0.0.0",
HostPort: "0", //宿主机端口, 0代表随机端口
},
},
},
}, nil, nil, "")
if err != nil {
panic(err)
}
err = c.ContainerStart(ctx, resp.ID, types.ContainerStartOptions{})
if err != nil {
panic(err)
}
fmt.Println("container started")
time.Sleep(5*time.Second)
inspectRes, err := c.ContainerInspect(ctx, resp.ID)
if err != nil {
panic(err)
}
fmt.Printf("listening at %+v\n",inspectRes.NetworkSettings.Ports["27017/tcp"][0])//查看当前所监听的IP端口信息
fmt.Println("killing container")
err = c.ContainerRemove(ctx, resp.ID, types.ContainerRemoveOptions{
Force: true, //停掉容器
}) //删除该Docker容器
if err != nil {
panic(err)
}
}
远程操作云服务器Docker
前提
远程操作前提下需要进行配置免密登录
,请参考我另一篇博客VSCode搭建远程服务器开发Ubuntu第一小节部分, 其次要先在云服务器上把镜像docker pull xxx
拉取下来
准备好以上重要操作,就可以进行下面的操作,否则会报错返回错误信息
环境准备
安装 SDK
$ go get github.com/docker/cli/cli/connhelper
$ go get github.com/docker/docker/client
初始化 Docker 客户端
不再使用环境变量默认的配置,而是通过配置参数的方式初始化 Docker 客户端,同时指定连接的 HTTP 客户端和上下文等信息。这样当尝试连接远程服务器的 Docker Daemon 时,connhelper 就会自动完成 ssh key 的验证操作
helper, _ := connhelper.GetConnectionHelper("ssh://Username@IP:22")
httpClient := &http.Client{
Transport: &http.Transport{
DialContext: helper.Dialer,
},
}
c, err := client.NewClientWithOpts(
client.WithHTTPClient(httpClient),
client.WithHost(helper.Host),
client.WithDialContext(helper.Dialer),
)
完整代码
开启一个MongoDB镜像容器,5s后删除该容器
package main
import (
"context"
"fmt"
"github.com/docker/cli/cli/connhelper"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/client"
"github.com/docker/go-connections/nat"
"net/http"
"time"
)
func main() {
helper, _ := connhelper.GetConnectionHelper("ssh://username@IP:22")
httpClient := &http.Client{
Transport: &http.Transport{
DialContext: helper.Dialer,
},
}
c, err := client.NewClientWithOpts(
client.WithHTTPClient(httpClient),
client.WithHost(helper.Host),
client.WithDialContext(helper.Dialer),
)
ctx := context.Background()
resp, err := c.ContainerCreate(ctx,
&container.Config{
Image: "mongo:latest",
ExposedPorts: nat.PortSet{
"27017/tcp": {}, //要暴露的端口
},
},
&container.HostConfig{
PortBindings: nat.PortMap{
"27017/tcp": []nat.PortBinding{ //容器端口
{
HostIP: "0.0.0.0",
HostPort: "0", //宿主机端口, 0代表随机端口
},
},
},
}, nil, nil, "")
if err != nil {
panic(err)
}
err = c.ContainerStart(ctx, resp.ID, types.ContainerStartOptions{})
if err != nil {
panic(err)
}
fmt.Println("container started")
time.Sleep(5*time.Second)
inspectRes, err := c.ContainerInspect(ctx, resp.ID)
if err != nil {
panic(err)
}
fmt.Printf("listening at %+v\n",inspectRes.NetworkSettings.Ports["27017/tcp"][0])//查看当前所监听的IP端口信息
fmt.Println("killing container")
err = c.ContainerRemove(ctx, resp.ID, types.ContainerRemoveOptions{
Force: true, //停掉容器
}) //删除该Docker容器
if err != nil {
panic(err)
}
}