// Info returns system-wide information, like the number of running containers.
//
// See http://goo.gl/LOmySw for more details.
func (c *Client) Info() (*engine.Env, error) {
body, _, err := c.do("GET", "/info", nil)
if err != nil {
return nil, err
}
var info engine.Env
err = info.Decode(bytes.NewReader(body))
if err != nil {
return nil, err
}
return &info, nil
}
func GetConnection(dockerSocket string) (*DockerClient, error) {
var (
client *gdocker.Client
err error
info *engine.Env
executionDriver string
)
client, err = gdocker.NewClient(dockerSocket)
if err != nil {
fmt.Println("Unable to connect to docker server:", err.Error())
return nil, err
}
if info, err = client.Info(); err != nil {
return nil, err
}
executionDriver = info.Get("ExecutionDriver")
return &DockerClient{client, executionDriver}, nil
}
func TestInfo(t *testing.T) {
body := `{
"Containers":11,
"Images":16,
"Debug":0,
"NFd":11,
"NGoroutines":21,
"MemoryLimit":1,
"SwapLimit":0
}`
fakeRT := FakeRoundTripper{message: body, status: http.StatusOK}
client := newTestClient(&fakeRT)
expected := engine.Env{}
expected.SetInt("Containers", 11)
expected.SetInt("Images", 16)
expected.SetBool("Debug", false)
expected.SetInt("NFd", 11)
expected.SetInt("NGoroutines", 21)
expected.SetBool("MemoryLimit", true)
expected.SetBool("SwapLimit", false)
info, err := client.Info()
if err != nil {
t.Fatal(err)
}
infoSlice := []string(*info)
expectedSlice := []string(expected)
sort.Strings(infoSlice)
sort.Strings(expectedSlice)
if !reflect.DeepEqual(expectedSlice, infoSlice) {
t.Errorf("Info(): Wrong result.\nWant %#v.\nGot %#v.", expected, *info)
}
req := fakeRT.requests[0]
if req.Method != "GET" {
t.Errorf("Info(): Wrong HTTP method. Want GET. Got %s.", req.Method)
}
u, _ := url.Parse(client.getURL("/info"))
if req.URL.Path != u.Path {
t.Errorf("Info(): Wrong request path. Want %q. Got %q.", u.Path, req.URL.Path)
}
}
