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ping docker daemon on startup [ci skip]

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This commit is contained in:
Brad Rydzewski
2019-10-22 16:00:56 -07:00
parent cb17765779
commit 3e003391ae
2 changed files with 44 additions and 22 deletions
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29
engine/engine_impl.go
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@@ -17,17 +17,18 @@ import (
"docker.io/go-docker/api/types/volume"
)
type engine struct {
// Docker implements a Docker pipeline engine.
type Docker struct {
client docker.APIClient
}
// New returns a new engine.
func New(client docker.APIClient) Engine {
return &engine{client}
func New(client docker.APIClient) *Docker {
return &Docker{client}
}
// NewEnv returns a new Engine from the environment.
func NewEnv() (Engine, error) {
func NewEnv() (*Docker, error) {
cli, err := docker.NewEnvClient()
if err != nil {
return nil, err
@@ -35,8 +36,14 @@ func NewEnv() (Engine, error) {
return New(cli), nil
}
// Ping pings the Docker daemon.
func (e *Docker) Ping(ctx context.Context) error {
_, err := e.client.Ping(ctx)
return err
}
// Setup the pipeline environment.
func (e *engine) Setup(ctx context.Context, spec *Spec) error {
func (e *Docker) Setup(ctx context.Context, spec *Spec) error {
// creates the default temporary (local) volumes
// that are mounted into each container step.
for _, vol := range spec.Volumes {
@@ -68,7 +75,7 @@ func (e *engine) Setup(ctx context.Context, spec *Spec) error {
}
// Destroy the pipeline environment.
func (e *engine) Destroy(ctx context.Context, spec *Spec) error {
func (e *Docker) Destroy(ctx context.Context, spec *Spec) error {
removeOpts := types.ContainerRemoveOptions{
Force: true,
RemoveLinks: false,
@@ -109,7 +116,7 @@ func (e *engine) Destroy(ctx context.Context, spec *Spec) error {
}
// Run runs the pipeline step.
func (e *engine) Run(ctx context.Context, spec *Spec, step *Step, output io.Writer) (*State, error) {
func (e *Docker) Run(ctx context.Context, spec *Spec, step *Step, output io.Writer) (*State, error) {
// create the container
err := e.create(ctx, spec, step, output)
if err != nil {
@@ -133,7 +140,7 @@ func (e *engine) Run(ctx context.Context, spec *Spec, step *Step, output io.Writ
// emulate docker commands
//
func (e *engine) create(ctx context.Context, spec *Spec, step *Step, output io.Writer) error {
func (e *Docker) create(ctx context.Context, spec *Spec, step *Step, output io.Writer) error {
// parse the docker image name. We need to extract the
// image domain name and match to registry credentials
// stored in the .docker/config.json object.
@@ -212,13 +219,13 @@ func (e *engine) create(ctx context.Context, spec *Spec, step *Step, output io.W
}
// helper function emulates the `docker start` command.
func (e *engine) start(ctx context.Context, id string) error {
func (e *Docker) start(ctx context.Context, id string) error {
return e.client.ContainerStart(ctx, id, types.ContainerStartOptions{})
}
// helper function emulates the `docker wait` command, blocking
// until the container stops and returning the exit code.
func (e *engine) wait(ctx context.Context, id string) (*State, error) {
func (e *Docker) wait(ctx context.Context, id string) (*State, error) {
wait, errc := e.client.ContainerWait(ctx, id, "")
select {
case <-wait:
@@ -243,7 +250,7 @@ func (e *engine) wait(ctx context.Context, id string) (*State, error) {
// helper function emulates the `docker logs -f` command, streaming
// all container logs until the container stops.
func (e *engine) tail(ctx context.Context, id string, output io.Writer) error {
func (e *Docker) tail(ctx context.Context, id string, output io.Writer) error {
opts := types.ContainerLogsOptions{
Follow: true,
ShowStdout: true,