api: docker endpoints

internal/api/v1/dockerapi/info.go

@@ -0,0 +1,56 @@
+package dockerapi
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"sort"
+
+	dockerSystem "github.com/docker/docker/api/types/system"
+	"github.com/yusing/go-proxy/internal/gperr"
+	"github.com/yusing/go-proxy/internal/utils/strutils"
+)
+
+type dockerInfo dockerSystem.Info
+
+func (d *dockerInfo) MarshalJSON() ([]byte, error) {
+	return json.Marshal(map[string]any{
+		"name":    d.Name,
+		"version": d.ServerVersion,
+		"containers": map[string]int{
+			"total":   d.Containers,
+			"running": d.ContainersRunning,
+			"paused":  d.ContainersPaused,
+			"stopped": d.ContainersStopped,
+		},
+		"images": d.Images,
+		"n_cpu":  d.NCPU,
+		"memory": strutils.FormatByteSizeWithUnit(d.MemTotal),
+	})
+}
+
+func DockerInfo(w http.ResponseWriter, r *http.Request) {
+	serveHTTP[dockerInfo](w, r, GetDockerInfo)
+}
+
+func GetDockerInfo(ctx context.Context, dockerClients DockerClients) ([]dockerInfo, gperr.Error) {
+	errs := gperr.NewBuilder("failed to get docker info")
+	dockerInfos := make([]dockerInfo, len(dockerClients))
+
+	i := 0
+	for name, dockerClient := range dockerClients {
+		info, err := dockerClient.Info(ctx)
+		if err != nil {
+			errs.Add(err)
+			continue
+		}
+		info.Name = name
+		dockerInfos[i] = dockerInfo(info)
+		i++
+	}
+
+	sort.Slice(dockerInfos, func(i, j int) bool {
+		return dockerInfos[i].Name < dockerInfos[j].Name
+	})
+	return dockerInfos, errs.Error()
+}