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moby--moby/client
Ian Campbell 61a234d562
client: do not fallback to GET if HEAD on _ping fail to connect
When we see an `ECONNREFUSED` (or equivalent) from an attempted `HEAD` on the
`/_ping` endpoint there is no point in trying again with `GET` since the server
is not responding/available at all.

Once vendored into the cli this will partially mitigate https://github.com/docker/cli/issues/1739
("Docker commands take 1 minute to timeout if context endpoint is unreachable")
by cutting the effective timeout in half.

Signed-off-by: Ian Campbell <ijc@docker.com>
(cherry picked from commit 8c8457b0f2)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2019-05-13 15:17:51 -07:00
..
testdata
build_cancel.go
build_prune.go
checkpoint_create.go
checkpoint_create_test.go
checkpoint_delete.go
checkpoint_delete_test.go
checkpoint_list.go
checkpoint_list_test.go
client.go
client_deprecated.go
client_mock_test.go
client_test.go
client_unix.go
client_windows.go
config_create.go
config_create_test.go
config_inspect.go
config_inspect_test.go
config_list.go
config_list_test.go
config_remove.go
config_remove_test.go
config_update.go
config_update_test.go
container_attach.go
container_commit.go
container_commit_test.go
container_copy.go
container_copy_test.go
container_create.go
container_create_test.go
container_diff.go
container_diff_test.go
container_exec.go
container_exec_test.go
container_export.go
container_export_test.go
container_inspect.go
container_inspect_test.go
container_kill.go
container_kill_test.go
container_list.go
container_list_test.go
container_logs.go
container_logs_test.go
container_pause.go
container_pause_test.go
container_prune.go
container_prune_test.go
container_remove.go
container_remove_test.go
container_rename.go
container_rename_test.go
container_resize.go
container_resize_test.go
container_restart.go
container_restart_test.go
container_start.go
container_start_test.go
container_stats.go
container_stats_test.go
container_stop.go
container_stop_test.go
container_top.go
container_top_test.go
container_unpause.go
container_unpause_test.go
container_update.go
container_update_test.go
container_wait.go
container_wait_test.go
disk_usage.go
disk_usage_test.go
distribution_inspect.go
distribution_inspect_test.go
errors.go
events.go
events_test.go
hijack.go
hijack_test.go
image_build.go
image_build_test.go
image_create.go
image_create_test.go
image_history.go
image_history_test.go
image_import.go
image_import_test.go
image_inspect.go
image_inspect_test.go
image_list.go
image_list_test.go
image_load.go
image_load_test.go
image_prune.go
image_prune_test.go
image_pull.go
image_pull_test.go
image_push.go
image_push_test.go
image_remove.go
image_remove_test.go
image_save.go
image_save_test.go
image_search.go
image_search_test.go
image_tag.go
image_tag_test.go
info.go
info_test.go
interface.go
interface_experimental.go
interface_stable.go
login.go
network_connect.go
network_connect_test.go
network_create.go
network_create_test.go
network_disconnect.go
network_disconnect_test.go
network_inspect.go
network_inspect_test.go
network_list.go
network_list_test.go
network_prune.go
network_prune_test.go
network_remove.go
network_remove_test.go
node_inspect.go
node_inspect_test.go
node_list.go
node_list_test.go
node_remove.go
node_remove_test.go
node_update.go
node_update_test.go
options.go
options_test.go
ping.go
ping_test.go
plugin_create.go
plugin_disable.go
plugin_disable_test.go
plugin_enable.go
plugin_enable_test.go
plugin_inspect.go
plugin_inspect_test.go
plugin_install.go
plugin_list.go
plugin_list_test.go
plugin_push.go
plugin_push_test.go
plugin_remove.go
plugin_remove_test.go
plugin_set.go
plugin_set_test.go
plugin_upgrade.go
README.md
request.go
request_test.go
secret_create.go
secret_create_test.go
secret_inspect.go
secret_inspect_test.go
secret_list.go
secret_list_test.go
secret_remove.go
secret_remove_test.go
secret_update.go
secret_update_test.go
service_create.go
service_create_test.go
service_inspect.go
service_inspect_test.go
service_list.go
service_list_test.go
service_logs.go
service_logs_test.go
service_remove.go
service_remove_test.go
service_update.go
service_update_test.go
swarm_get_unlock_key.go
swarm_get_unlock_key_test.go
swarm_init.go
swarm_init_test.go
swarm_inspect.go
swarm_inspect_test.go
swarm_join.go
swarm_join_test.go
swarm_leave.go
swarm_leave_test.go
swarm_unlock.go
swarm_unlock_test.go
swarm_update.go
swarm_update_test.go
task_inspect.go
task_inspect_test.go
task_list.go
task_list_test.go
task_logs.go
transport.go
utils.go
version.go
volume_create.go
volume_create_test.go
volume_inspect.go
volume_inspect_test.go
volume_list.go
volume_list_test.go
volume_prune.go
volume_remove.go
volume_remove_test.go

Go client for the Docker Engine API

The docker command uses this package to communicate with the daemon. It can also be used by your own Go applications to do anything the command-line interface does  running containers, pulling images, managing swarms, etc.

For example, to list running containers (the equivalent of docker ps):

package main

import (
	"context"
	"fmt"

	"github.com/docker/docker/api/types"
	"github.com/docker/docker/client"
)

func main() {
	cli, err := client.NewClientWithOpts(client.FromEnv)
	if err != nil {
		panic(err)
	}

	containers, err := cli.ContainerList(context.Background(), types.ContainerListOptions{})
	if err != nil {
		panic(err)
	}

	for _, container := range containers {
		fmt.Printf("%s %s\n", container.ID[:10], container.Image)
	}
}

Full documentation is available on GoDoc.