I am trying to access a remote docker daemon using ssh. I managed to do this using docker cli.
docker -H ssh://user@host images
Is there a way to do the same using Golang Docker SDK?
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be aware system intentionally blocks ability to launch containers onto remote host ... all launching and lifecycle actions need to get executed local to host ... hence motive for container orchestration tools to install an agent local to each host ... typically such agent reads from etcd instructions to issue the lifecycle commands ... in turn etcd is written to by some controller doing the actual decision makingJohn Scott Stensland– John Scott Stensland2025-10-02 14:14:57 +00:00Commented Oct 2 at 14:14
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1 Answer
After going through Docker CLI source code, I managed to do the above using Golang Docker SDK. Below is a code snippet.
package main
import (
"context"
"fmt"
"github.com/docker/cli/cli/connhelper"
"github.com/docker/docker/api/types"
"github.com/docker/docker/client"
"net/http"
"os"
)
func main(){
helper, err := connhelper.GetConnectionHelper("ssh://user@host:22")
if err != nil{
return
}
httpClient := &http.Client{
// No tls
// No proxy
Transport: &http.Transport{
DialContext: helper.Dialer,
},
}
var clientOpts []client.Opt
clientOpts = append(clientOpts,
client.WithHTTPClient(httpClient),
client.WithHost(helper.Host),
client.WithDialContext(helper.Dialer),
)
version := os.Getenv("DOCKER_API_VERSION")
if version != "" {
clientOpts = append(clientOpts, client.WithVersion(version))
} else {
clientOpts = append(clientOpts, client.WithAPIVersionNegotiation())
}
cl, err := client.NewClientWithOpts(clientOpts...)
if err != nil {
fmt.Println("Unable to create docker client")
panic(err)
}
fmt.Println(cl.ImageList(context.Background(), types.ImageListOptions{}))
}