fixed loadbalancer with idlewatcher, fixed reload issue

internal/docker/list_containers.go

@@ -0,0 +1,45 @@
+package docker
+
+import (
+	"context"
+	"errors"
+	"time"
+
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/api/types/container"
+	"github.com/docker/docker/client"
+	E "github.com/yusing/go-proxy/internal/error"
+)
+
+var listOptions = container.ListOptions{
+	// created|restarting|running|removing|paused|exited|dead
+	// Filters: filters.NewArgs(
+	// 	filters.Arg("status", "created"),
+	// 	filters.Arg("status", "restarting"),
+	// 	filters.Arg("status", "running"),
+	// 	filters.Arg("status", "paused"),
+	// 	filters.Arg("status", "exited"),
+	// ),
+	All: true,
+}
+
+func ListContainers(clientHost string) ([]types.Container, E.Error) {
+	dockerClient, err := ConnectClient(clientHost)
+	if err.HasError() {
+		return nil, E.FailWith("connect to docker", err)
+	}
+	defer dockerClient.Close()
+
+	ctx, cancel := context.WithTimeoutCause(context.Background(), 3*time.Second, errors.New("list containers timeout"))
+	defer cancel()
+
+	containers, err := E.Check(dockerClient.ContainerList(ctx, listOptions))
+	if err.HasError() {
+		return nil, E.FailWith("list containers", err)
+	}
+	return containers, nil
+}
+
+func IsErrConnectionFailed(err error) bool {
+	return client.IsErrConnectionFailed(err)
+}