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docker.go
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package testcontainers
import (
"archive/tar"
"bufio"
"bytes"
"context"
"encoding/base64"
"encoding/binary"
"encoding/json"
"errors"
"fmt"
"io"
"io/fs"
"net/url"
"os"
"path/filepath"
"regexp"
"strings"
"sync"
"time"
"github.com/cenkalti/backoff/v4"
"github.com/containerd/containerd/platforms"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/image"
"github.com/docker/docker/api/types/network"
"github.com/docker/docker/client"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/pkg/jsonmessage"
"github.com/docker/go-connections/nat"
"github.com/moby/term"
specs "github.com/opencontainers/image-spec/specs-go/v1"
tcexec "github.com/testcontainers/testcontainers-go/exec"
"github.com/testcontainers/testcontainers-go/internal/config"
"github.com/testcontainers/testcontainers-go/internal/core"
"github.com/testcontainers/testcontainers-go/wait"
)
// Implement interfaces
var _ Container = (*DockerContainer)(nil)
const (
Bridge = "bridge" // Bridge network name (as well as driver)
Podman = "podman"
ReaperDefault = "reaper_default" // Default network name when bridge is not available
packagePath = "github.com/testcontainers/testcontainers-go"
logStoppedForOutOfSyncMessage = "Stopping log consumer: Headers out of sync"
)
var createContainerFailDueToNameConflictRegex = regexp.MustCompile("Conflict. The container name .* is already in use by container .*")
// DockerContainer represents a container started using Docker
type DockerContainer struct {
// Container ID from Docker
ID string
WaitingFor wait.Strategy
Image string
isRunning bool
imageWasBuilt bool
// keepBuiltImage makes Terminate not remove the image if imageWasBuilt.
keepBuiltImage bool
provider *DockerProvider
sessionID string
terminationSignal chan bool
consumers []LogConsumer
raw *types.ContainerJSON
logProductionError chan error
// TODO: Remove locking and wait group once the deprecated StartLogProducer and
// StopLogProducer have been removed and hence logging can only be started and
// stopped once.
// logProductionWaitGroup is used to signal when the log production has stopped.
// This allows stopLogProduction to safely set logProductionStop to nil.
// See simplification in https://go.dev/play/p/x0pOElF2Vjf
logProductionWaitGroup sync.WaitGroup
logProductionStop chan struct{}
logProductionTimeout *time.Duration
logger Logging
lifecycleHooks []ContainerLifecycleHooks
healthStatus string // container health status, will default to healthStatusNone if no healthcheck is present
}
// SetLogger sets the logger for the container
func (c *DockerContainer) SetLogger(logger Logging) {
c.logger = logger
}
// SetProvider sets the provider for the container
func (c *DockerContainer) SetProvider(provider *DockerProvider) {
c.provider = provider
}
// SetTerminationSignal sets the termination signal for the container
func (c *DockerContainer) SetTerminationSignal(signal chan bool) {
c.terminationSignal = signal
}
func (c *DockerContainer) GetContainerID() string {
return c.ID
}
func (c *DockerContainer) IsRunning() bool {
return c.isRunning
}
// Endpoint gets proto://host:port string for the first exposed port
// Will returns just host:port if proto is ""
func (c *DockerContainer) Endpoint(ctx context.Context, proto string) (string, error) {
inspect, err := c.Inspect(ctx)
if err != nil {
return "", err
}
ports := inspect.NetworkSettings.Ports
// get first port
var firstPort nat.Port
for p := range ports {
firstPort = p
break
}
return c.PortEndpoint(ctx, firstPort, proto)
}
// PortEndpoint gets proto://host:port string for the given exposed port
// Will returns just host:port if proto is ""
func (c *DockerContainer) PortEndpoint(ctx context.Context, port nat.Port, proto string) (string, error) {
host, err := c.Host(ctx)
if err != nil {
return "", err
}
outerPort, err := c.MappedPort(ctx, port)
if err != nil {
return "", err
}
protoFull := ""
if proto != "" {
protoFull = fmt.Sprintf("%s://", proto)
}
return fmt.Sprintf("%s%s:%s", protoFull, host, outerPort.Port()), nil
}
// Host gets host (ip or name) of the docker daemon where the container port is exposed
// Warning: this is based on your Docker host setting. Will fail if using an SSH tunnel
// You can use the "TC_HOST" env variable to set this yourself
func (c *DockerContainer) Host(ctx context.Context) (string, error) {
host, err := c.provider.DaemonHost(ctx)
if err != nil {
return "", err
}
return host, nil
}
// Inspect gets the raw container info, caching the result for subsequent calls
func (c *DockerContainer) Inspect(ctx context.Context) (*types.ContainerJSON, error) {
if c.raw != nil {
return c.raw, nil
}
jsonRaw, err := c.inspectRawContainer(ctx)
if err != nil {
return nil, err
}
return jsonRaw, nil
}
// MappedPort gets externally mapped port for a container port
func (c *DockerContainer) MappedPort(ctx context.Context, port nat.Port) (nat.Port, error) {
inspect, err := c.Inspect(ctx)
if err != nil {
return "", err
}
if inspect.ContainerJSONBase.HostConfig.NetworkMode == "host" {
return port, nil
}
ports := inspect.NetworkSettings.Ports
for k, p := range ports {
if k.Port() != port.Port() {
continue
}
if port.Proto() != "" && k.Proto() != port.Proto() {
continue
}
if len(p) == 0 {
continue
}
return nat.NewPort(k.Proto(), p[0].HostPort)
}
return "", errors.New("port not found")
}
// Deprecated: use c.Inspect(ctx).NetworkSettings.Ports instead.
// Ports gets the exposed ports for the container.
func (c *DockerContainer) Ports(ctx context.Context) (nat.PortMap, error) {
inspect, err := c.Inspect(ctx)
if err != nil {
return nil, err
}
return inspect.NetworkSettings.Ports, nil
}
// SessionID gets the current session id
func (c *DockerContainer) SessionID() string {
return c.sessionID
}
// Start will start an already created container
func (c *DockerContainer) Start(ctx context.Context) error {
err := c.startingHook(ctx)
if err != nil {
return err
}
if err := c.provider.client.ContainerStart(ctx, c.ID, container.StartOptions{}); err != nil {
return err
}
defer c.provider.Close()
err = c.startedHook(ctx)
if err != nil {
return err
}
c.isRunning = true
err = c.readiedHook(ctx)
if err != nil {
return err
}
return nil
}
// Stop will stop an already started container
//
// In case the container fails to stop
// gracefully within a time frame specified by the timeout argument,
// it is forcefully terminated (killed).
//
// If the timeout is nil, the container's StopTimeout value is used, if set,
// otherwise the engine default. A negative timeout value can be specified,
// meaning no timeout, i.e. no forceful termination is performed.
func (c *DockerContainer) Stop(ctx context.Context, timeout *time.Duration) error {
err := c.stoppingHook(ctx)
if err != nil {
return err
}
var options container.StopOptions
if timeout != nil {
timeoutSeconds := int(timeout.Seconds())
options.Timeout = &timeoutSeconds
}
if err := c.provider.client.ContainerStop(ctx, c.ID, options); err != nil {
return err
}
defer c.provider.Close()
c.isRunning = false
c.raw = nil // invalidate the cache, as the container representation will change after stopping
err = c.stoppedHook(ctx)
if err != nil {
return err
}
return nil
}
// Terminate is used to kill the container. It is usually triggered by as defer function.
func (c *DockerContainer) Terminate(ctx context.Context) error {
select {
// close reaper if it was created
case c.terminationSignal <- true:
default:
}
defer c.provider.client.Close()
errs := []error{
c.terminatingHook(ctx),
c.provider.client.ContainerRemove(ctx, c.GetContainerID(), container.RemoveOptions{
RemoveVolumes: true,
Force: true,
}),
c.terminatedHook(ctx),
}
if c.imageWasBuilt && !c.keepBuiltImage {
_, err := c.provider.client.ImageRemove(ctx, c.Image, image.RemoveOptions{
Force: true,
PruneChildren: true,
})
errs = append(errs, err)
}
c.sessionID = ""
c.isRunning = false
c.raw = nil // invalidate the cache here too
return errors.Join(errs...)
}
// update container raw info
func (c *DockerContainer) inspectRawContainer(ctx context.Context) (*types.ContainerJSON, error) {
defer c.provider.Close()
inspect, err := c.provider.client.ContainerInspect(ctx, c.ID)
if err != nil {
return nil, err
}
c.raw = &inspect
return c.raw, nil
}
// Logs will fetch both STDOUT and STDERR from the current container. Returns a
// ReadCloser and leaves it up to the caller to extract what it wants.
func (c *DockerContainer) Logs(ctx context.Context) (io.ReadCloser, error) {
const streamHeaderSize = 8
options := container.LogsOptions{
ShowStdout: true,
ShowStderr: true,
}
rc, err := c.provider.client.ContainerLogs(ctx, c.ID, options)
if err != nil {
return nil, err
}
defer c.provider.Close()
pr, pw := io.Pipe()
r := bufio.NewReader(rc)
go func() {
lineStarted := true
for err == nil {
line, isPrefix, err := r.ReadLine()
if lineStarted && len(line) >= streamHeaderSize {
line = line[streamHeaderSize:] // trim stream header
lineStarted = false
}
if !isPrefix {
lineStarted = true
}
_, errW := pw.Write(line)
if errW != nil {
return
}
if !isPrefix {
_, errW := pw.Write([]byte("\n"))
if errW != nil {
return
}
}
if err != nil {
_ = pw.CloseWithError(err)
return
}
}
}()
return pr, nil
}
// Deprecated: use the ContainerRequest.LogConsumerConfig field instead.
func (c *DockerContainer) FollowOutput(consumer LogConsumer) {
c.followOutput(consumer)
}
// followOutput adds a LogConsumer to be sent logs from the container's
// STDOUT and STDERR
func (c *DockerContainer) followOutput(consumer LogConsumer) {
c.consumers = append(c.consumers, consumer)
}
// Deprecated: use c.Inspect(ctx).Name instead.
// Name gets the name of the container.
func (c *DockerContainer) Name(ctx context.Context) (string, error) {
inspect, err := c.Inspect(ctx)
if err != nil {
return "", err
}
return inspect.Name, nil
}
// State returns container's running state. This method does not use the cache
// and always fetches the latest state from the Docker daemon.
func (c *DockerContainer) State(ctx context.Context) (*types.ContainerState, error) {
inspect, err := c.inspectRawContainer(ctx)
if err != nil {
if c.raw != nil {
return c.raw.State, err
}
return nil, err
}
return inspect.State, nil
}
// Networks gets the names of the networks the container is attached to.
func (c *DockerContainer) Networks(ctx context.Context) ([]string, error) {
inspect, err := c.Inspect(ctx)
if err != nil {
return []string{}, err
}
networks := inspect.NetworkSettings.Networks
n := []string{}
for k := range networks {
n = append(n, k)
}
return n, nil
}
// ContainerIP gets the IP address of the primary network within the container.
func (c *DockerContainer) ContainerIP(ctx context.Context) (string, error) {
inspect, err := c.Inspect(ctx)
if err != nil {
return "", err
}
ip := inspect.NetworkSettings.IPAddress
if ip == "" {
// use IP from "Networks" if only single network defined
networks := inspect.NetworkSettings.Networks
if len(networks) == 1 {
for _, v := range networks {
ip = v.IPAddress
}
}
}
return ip, nil
}
// ContainerIPs gets the IP addresses of all the networks within the container.
func (c *DockerContainer) ContainerIPs(ctx context.Context) ([]string, error) {
ips := make([]string, 0)
inspect, err := c.Inspect(ctx)
if err != nil {
return nil, err
}
networks := inspect.NetworkSettings.Networks
for _, nw := range networks {
ips = append(ips, nw.IPAddress)
}
return ips, nil
}
// NetworkAliases gets the aliases of the container for the networks it is attached to.
func (c *DockerContainer) NetworkAliases(ctx context.Context) (map[string][]string, error) {
inspect, err := c.Inspect(ctx)
if err != nil {
return map[string][]string{}, err
}
networks := inspect.NetworkSettings.Networks
a := map[string][]string{}
for k := range networks {
a[k] = networks[k].Aliases
}
return a, nil
}
// Exec executes a command in the current container.
// It returns the exit status of the executed command, an [io.Reader] containing the combined
// stdout and stderr, and any encountered error. Note that reading directly from the [io.Reader]
// may result in unexpected bytes due to custom stream multiplexing headers.
// Use [tcexec.Multiplexed] option to read the combined output without the multiplexing headers.
// Alternatively, to separate the stdout and stderr from [io.Reader] and interpret these headers properly,
// [github.com/docker/docker/pkg/stdcopy.StdCopy] from the Docker API should be used.
func (c *DockerContainer) Exec(ctx context.Context, cmd []string, options ...tcexec.ProcessOption) (int, io.Reader, error) {
cli := c.provider.client
processOptions := tcexec.NewProcessOptions(cmd)
// processing all the options in a first loop because for the multiplexed option
// we first need to have a containerExecCreateResponse
for _, o := range options {
o.Apply(processOptions)
}
response, err := cli.ContainerExecCreate(ctx, c.ID, processOptions.ExecConfig)
if err != nil {
return 0, nil, err
}
hijack, err := cli.ContainerExecAttach(ctx, response.ID, types.ExecStartCheck{})
if err != nil {
return 0, nil, err
}
processOptions.Reader = hijack.Reader
// second loop to process the multiplexed option, as now we have a reader
// from the created exec response.
for _, o := range options {
o.Apply(processOptions)
}
var exitCode int
for {
execResp, err := cli.ContainerExecInspect(ctx, response.ID)
if err != nil {
return 0, nil, err
}
if !execResp.Running {
exitCode = execResp.ExitCode
break
}
time.Sleep(100 * time.Millisecond)
}
return exitCode, processOptions.Reader, nil
}
type FileFromContainer struct {
underlying *io.ReadCloser
tarreader *tar.Reader
}
func (fc *FileFromContainer) Read(b []byte) (int, error) {
return (*fc.tarreader).Read(b)
}
func (fc *FileFromContainer) Close() error {
return (*fc.underlying).Close()
}
func (c *DockerContainer) CopyFileFromContainer(ctx context.Context, filePath string) (io.ReadCloser, error) {
r, _, err := c.provider.client.CopyFromContainer(ctx, c.ID, filePath)
if err != nil {
return nil, err
}
defer c.provider.Close()
tarReader := tar.NewReader(r)
// if we got here we have exactly one file in the TAR-stream
// so we advance the index by one so the next call to Read will start reading it
_, err = tarReader.Next()
if err != nil {
return nil, err
}
ret := &FileFromContainer{
underlying: &r,
tarreader: tarReader,
}
return ret, nil
}
// CopyDirToContainer copies the contents of a directory to a parent path in the container. This parent path must exist in the container first
// as we cannot create it
func (c *DockerContainer) CopyDirToContainer(ctx context.Context, hostDirPath string, containerParentPath string, fileMode int64) error {
dir, err := isDir(hostDirPath)
if err != nil {
return err
}
if !dir {
// it's not a dir: let the consumer to handle an error
return fmt.Errorf("path %s is not a directory", hostDirPath)
}
buff, err := tarDir(hostDirPath, fileMode)
if err != nil {
return err
}
// create the directory under its parent
parent := filepath.Dir(containerParentPath)
err = c.provider.client.CopyToContainer(ctx, c.ID, parent, buff, types.CopyToContainerOptions{})
if err != nil {
return err
}
defer c.provider.Close()
return nil
}
func (c *DockerContainer) CopyFileToContainer(ctx context.Context, hostFilePath string, containerFilePath string, fileMode int64) error {
dir, err := isDir(hostFilePath)
if err != nil {
return err
}
if dir {
return c.CopyDirToContainer(ctx, hostFilePath, containerFilePath, fileMode)
}
f, err := os.Open(hostFilePath)
if err != nil {
return err
}
defer f.Close()
info, err := f.Stat()
if err != nil {
return err
}
// In Go 1.22 os.File is always an io.WriterTo. However, testcontainers
// currently allows Go 1.21, so we need to trick the compiler a little.
var file fs.File = f
return c.copyToContainer(ctx, func(tw io.Writer) error {
// Attempt optimized writeTo, implemented in linux
if wt, ok := file.(io.WriterTo); ok {
_, err := wt.WriteTo(tw)
return err
}
_, err := io.Copy(tw, f)
return err
}, info.Size(), containerFilePath, fileMode)
}
// CopyToContainer copies fileContent data to a file in container
func (c *DockerContainer) CopyToContainer(ctx context.Context, fileContent []byte, containerFilePath string, fileMode int64) error {
return c.copyToContainer(ctx, func(tw io.Writer) error {
_, err := tw.Write(fileContent)
return err
}, int64(len(fileContent)), containerFilePath, fileMode)
}
func (c *DockerContainer) copyToContainer(ctx context.Context, fileContent func(tw io.Writer) error, fileContentSize int64, containerFilePath string, fileMode int64) error {
buffer, err := tarFile(containerFilePath, fileContent, fileContentSize, fileMode)
if err != nil {
return err
}
err = c.provider.client.CopyToContainer(ctx, c.ID, "/", buffer, types.CopyToContainerOptions{})
if err != nil {
return err
}
defer c.provider.Close()
return nil
}
type LogProductionOption func(*DockerContainer)
// WithLogProductionTimeout is a functional option that sets the timeout for the log production.
// If the timeout is lower than 5s or greater than 60s it will be set to 5s or 60s respectively.
func WithLogProductionTimeout(timeout time.Duration) LogProductionOption {
return func(c *DockerContainer) {
c.logProductionTimeout = &timeout
}
}
// Deprecated: use the ContainerRequest.LogConsumerConfig field instead.
func (c *DockerContainer) StartLogProducer(ctx context.Context, opts ...LogProductionOption) error {
return c.startLogProduction(ctx, opts...)
}
// startLogProduction will start a concurrent process that will continuously read logs
// from the container and will send them to each added LogConsumer.
// Default log production timeout is 5s. It is used to set the context timeout
// which means that each log-reading loop will last at least the specified timeout
// and that it cannot be cancelled earlier.
// Use functional option WithLogProductionTimeout() to override default timeout. If it's
// lower than 5s and greater than 60s it will be set to 5s or 60s respectively.
func (c *DockerContainer) startLogProduction(ctx context.Context, opts ...LogProductionOption) error {
c.logProductionStop = make(chan struct{}, 1) // buffered channel to avoid blocking
c.logProductionWaitGroup.Add(1)
for _, opt := range opts {
opt(c)
}
minLogProductionTimeout := time.Duration(5 * time.Second)
maxLogProductionTimeout := time.Duration(60 * time.Second)
if c.logProductionTimeout == nil {
c.logProductionTimeout = &minLogProductionTimeout
}
if *c.logProductionTimeout < minLogProductionTimeout {
c.logProductionTimeout = &minLogProductionTimeout
}
if *c.logProductionTimeout > maxLogProductionTimeout {
c.logProductionTimeout = &maxLogProductionTimeout
}
c.logProductionError = make(chan error, 1)
go func() {
defer func() {
close(c.logProductionError)
c.logProductionWaitGroup.Done()
}()
since := ""
// if the socket is closed we will make additional logs request with updated Since timestamp
BEGIN:
options := container.LogsOptions{
ShowStdout: true,
ShowStderr: true,
Follow: true,
Since: since,
}
ctx, cancel := context.WithTimeout(ctx, *c.logProductionTimeout)
defer cancel()
r, err := c.provider.client.ContainerLogs(ctx, c.GetContainerID(), options)
if err != nil {
c.logProductionError <- err
return
}
defer c.provider.Close()
for {
select {
case <-c.logProductionStop:
c.logProductionError <- r.Close()
return
default:
h := make([]byte, 8)
_, err := io.ReadFull(r, h)
if err != nil {
// proper type matching requires https://go-review.googlesource.com/c/go/+/250357/ (go 1.16)
if strings.Contains(err.Error(), "use of closed network connection") {
now := time.Now()
since = fmt.Sprintf("%d.%09d", now.Unix(), int64(now.Nanosecond()))
goto BEGIN
}
if errors.Is(err, context.DeadlineExceeded) || errors.Is(err, context.Canceled) {
// Probably safe to continue here
continue
}
_, _ = fmt.Fprintf(os.Stderr, "container log error: %+v. %s", err, logStoppedForOutOfSyncMessage)
// if we would continue here, the next header-read will result into random data...
return
}
count := binary.BigEndian.Uint32(h[4:])
if count == 0 {
continue
}
logType := h[0]
if logType > 2 {
_, _ = fmt.Fprintf(os.Stderr, "received invalid log type: %d", logType)
// sometimes docker returns logType = 3 which is an undocumented log type, so treat it as stdout
logType = 1
}
// a map of the log type --> int representation in the header, notice the first is blank, this is stdin, but the go docker client doesn't allow following that in logs
logTypes := []string{"", StdoutLog, StderrLog}
b := make([]byte, count)
_, err = io.ReadFull(r, b)
if err != nil {
// TODO: add-logger: use logger to log out this error
_, _ = fmt.Fprintf(os.Stderr, "error occurred reading log with known length %s", err.Error())
if errors.Is(err, context.DeadlineExceeded) || errors.Is(err, context.Canceled) {
// Probably safe to continue here
continue
}
// we can not continue here as the next read most likely will not be the next header
_, _ = fmt.Fprintln(os.Stderr, logStoppedForOutOfSyncMessage)
return
}
for _, c := range c.consumers {
c.Accept(Log{
LogType: logTypes[logType],
Content: b,
})
}
}
}
}()
return nil
}
// Deprecated: it will be removed in the next major release.
func (c *DockerContainer) StopLogProducer() error {
return c.stopLogProduction()
}
// stopLogProduction will stop the concurrent process that is reading logs
// and sending them to each added LogConsumer
func (c *DockerContainer) stopLogProduction() error {
// signal the log production to stop
c.logProductionStop <- struct{}{}
c.logProductionWaitGroup.Wait()
return <-c.logProductionError
}
// GetLogProductionErrorChannel exposes the only way for the consumer
// to be able to listen to errors and react to them.
func (c *DockerContainer) GetLogProductionErrorChannel() <-chan error {
return c.logProductionError
}
// DockerNetwork represents a network started using Docker
type DockerNetwork struct {
ID string // Network ID from Docker
Driver string
Name string
provider *DockerProvider
terminationSignal chan bool
}
// Remove is used to remove the network. It is usually triggered by as defer function.
func (n *DockerNetwork) Remove(ctx context.Context) error {
select {
// close reaper if it was created
case n.terminationSignal <- true:
default:
}
defer n.provider.Close()
return n.provider.client.NetworkRemove(ctx, n.ID)
}
func (n *DockerNetwork) SetTerminationSignal(signal chan bool) {
n.terminationSignal = signal
}
// DockerProvider implements the ContainerProvider interface
type DockerProvider struct {
*DockerProviderOptions
client client.APIClient
host string
hostCache string
config TestcontainersConfig
}
// Client gets the docker client used by the provider
func (p *DockerProvider) Client() client.APIClient {
return p.client
}
// Close closes the docker client used by the provider
func (p *DockerProvider) Close() error {
if p.client == nil {
return nil
}
return p.client.Close()
}
// SetClient sets the docker client to be used by the provider
func (p *DockerProvider) SetClient(c client.APIClient) {
p.client = c
}
var _ ContainerProvider = (*DockerProvider)(nil)
// BuildImage will build and image from context and Dockerfile, then return the tag
func (p *DockerProvider) BuildImage(ctx context.Context, img ImageBuildInfo) (string, error) {
buildOptions, err := img.BuildOptions()
var buildError error
var resp types.ImageBuildResponse
err = backoff.Retry(func() error {
resp, err = p.client.ImageBuild(ctx, buildOptions.Context, buildOptions)
if err != nil {
buildError = errors.Join(buildError, err)
if isPermanentClientError(err) {
return backoff.Permanent(err)
}
Logger.Printf("Failed to build image: %s, will retry", err)
return err
}
defer p.Close()
return nil
}, backoff.WithContext(backoff.NewExponentialBackOff(), ctx))
if err != nil {
return "", errors.Join(buildError, err)
}
if img.ShouldPrintBuildLog() {
termFd, isTerm := term.GetFdInfo(os.Stderr)
err = jsonmessage.DisplayJSONMessagesStream(resp.Body, os.Stderr, termFd, isTerm, nil)
if err != nil {
return "", err
}
}
// need to read the response from Docker, I think otherwise the image
// might not finish building before continuing to execute here
buf := new(bytes.Buffer)
_, err = buf.ReadFrom(resp.Body)
if err != nil {
return "", err
}
_ = resp.Body.Close()
// the first tag is the one we want
return buildOptions.Tags[0], nil
}
// CreateContainer fulfills a request for a container without starting it
func (p *DockerProvider) CreateContainer(ctx context.Context, req ContainerRequest) (Container, error) {
var err error
// defer the close of the Docker client connection the soonest
defer p.Close()
// Make sure that bridge network exists
// In case it is disabled we will create reaper_default network
if p.DefaultNetwork == "" {
p.DefaultNetwork, err = p.getDefaultNetwork(ctx, p.client)
if err != nil {
return nil, err
}
}
// If default network is not bridge make sure it is attached to the request
// as container won't be attached to it automatically
// in case of Podman the bridge network is called 'podman' as 'bridge' would conflict
if p.DefaultNetwork != p.defaultBridgeNetworkName {
isAttached := false
for _, net := range req.Networks {
if net == p.DefaultNetwork {
isAttached = true
break
}
}
if !isAttached {
req.Networks = append(req.Networks, p.DefaultNetwork)
}
}
imageName := req.Image
env := []string{}
for envKey, envVar := range req.Env {
env = append(env, envKey+"="+envVar)
}
if req.Labels == nil {
req.Labels = make(map[string]string)
}
tcConfig := p.Config().Config
var termSignal chan bool
// the reaper does not need to start a reaper for itself
isReaperContainer := strings.HasSuffix(imageName, config.ReaperDefaultImage)
if !tcConfig.RyukDisabled && !isReaperContainer {
r, err := reuseOrCreateReaper(context.WithValue(ctx, core.DockerHostContextKey, p.host), core.SessionID(), p)
if err != nil {
return nil, fmt.Errorf("%w: creating reaper failed", err)
}
termSignal, err = r.Connect()
if err != nil {
return nil, fmt.Errorf("%w: connecting to reaper failed", err)
}
}
// Cleanup on error, otherwise set termSignal to nil before successful return.
defer func() {
if termSignal != nil {
termSignal <- true