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How to use getDefaultNetwork method of testcontainers Package

Best Testcontainers-go code snippet using testcontainers.getDefaultNetwork

docker.go

Source:docker.go

...620func (p *DockerProvider) CreateContainer(ctx context.Context, req ContainerRequest) (Container, error) {621	var err error622	// Make sure that bridge network exists623	// In case it is disabled we will create reaper_default network624	p.defaultNetwork, err = getDefaultNetwork(ctx, p.client)625	if err != nil {626		return nil, err627	}628	// If default network is not bridge make sure it is attached to the request629	// as container won't be attached to it automatically630	if p.defaultNetwork != Bridge {631		isAttached := false632		for _, net := range req.Networks {633			if net == p.defaultNetwork {634				isAttached = true635				break636			}637		}638		if !isAttached {639			req.Networks = append(req.Networks, p.defaultNetwork)640		}641	}642	exposedPortSet, exposedPortMap, err := nat.ParsePortSpecs(req.ExposedPorts)643	if err != nil {644		return nil, err645	}646	env := []string{}647	for envKey, envVar := range req.Env {648		env = append(env, envKey+"="+envVar)649	}650	if req.Labels == nil {651		req.Labels = make(map[string]string)652	}653	sessionID := uuid.New()654	var termSignal chan bool655	if !req.SkipReaper {656		r, err := NewReaper(ctx, sessionID.String(), p, req.ReaperImage)657		if err != nil {658			return nil, fmt.Errorf("%w: creating reaper failed", err)659		}660		termSignal, err = r.Connect()661		if err != nil {662			return nil, fmt.Errorf("%w: connecting to reaper failed", err)663		}664		for k, v := range r.Labels() {665			if _, ok := req.Labels[k]; !ok {666				req.Labels[k] = v667			}668		}669	}670	if err = req.Validate(); err != nil {671		return nil, err672	}673	var tag string674	var platform *specs.Platform675	if req.ShouldBuildImage() {676		tag, err = p.BuildImage(ctx, &req)677		if err != nil {678			return nil, err679		}680	} else {681		tag = req.Image682		if req.ImagePlatform != "" {683			p, err := platforms.Parse(req.ImagePlatform)684			if err != nil {685				return nil, fmt.Errorf("invalid platform %s: %w", req.ImagePlatform, err)686			}687			platform = &p688		}689		var shouldPullImage bool690		if req.AlwaysPullImage {691			shouldPullImage = true // If requested always attempt to pull image692		} else {693			image, _, err := p.client.ImageInspectWithRaw(ctx, tag)694			if err != nil {695				if client.IsErrNotFound(err) {696					shouldPullImage = true697				} else {698					return nil, err699				}700			}701			if platform != nil && (image.Architecture != platform.Architecture || image.Os != platform.OS) {702				shouldPullImage = true703			}704		}705		if shouldPullImage {706			pullOpt := types.ImagePullOptions{707				Platform: req.ImagePlatform, // may be empty708			}709			if req.RegistryCred != "" {710				pullOpt.RegistryAuth = req.RegistryCred711			}712			if err := p.attemptToPullImage(ctx, tag, pullOpt); err != nil {713				return nil, err714			}715		}716	}717	dockerInput := &container.Config{718		Entrypoint:   req.Entrypoint,719		Image:        tag,720		Env:          env,721		ExposedPorts: exposedPortSet,722		Labels:       req.Labels,723		Cmd:          req.Cmd,724		Hostname:     req.Hostname,725		User:         req.User,726	}727	// prepare mounts728	mounts := mapToDockerMounts(req.Mounts)729	hostConfig := &container.HostConfig{730		ExtraHosts:   req.ExtraHosts,731		PortBindings: exposedPortMap,732		Mounts:       mounts,733		Tmpfs:        req.Tmpfs,734		AutoRemove:   req.AutoRemove,735		Privileged:   req.Privileged,736		NetworkMode:  req.NetworkMode,737		Resources:    req.Resources,738	}739	endpointConfigs := map[string]*network.EndpointSettings{}740	// #248: Docker allows only one network to be specified during container creation741	// If there is more than one network specified in the request container should be attached to them742	// once it is created. We will take a first network if any specified in the request and use it to create container743	if len(req.Networks) > 0 {744		attachContainerTo := req.Networks[0]745		nw, err := p.GetNetwork(ctx, NetworkRequest{746			Name: attachContainerTo,747		})748		if err == nil {749			endpointSetting := network.EndpointSettings{750				Aliases:   req.NetworkAliases[attachContainerTo],751				NetworkID: nw.ID,752			}753			endpointConfigs[attachContainerTo] = &endpointSetting754		}755	}756	networkingConfig := network.NetworkingConfig{757		EndpointsConfig: endpointConfigs,758	}759	resp, err := p.client.ContainerCreate(ctx, dockerInput, hostConfig, &networkingConfig, platform, req.Name)760	if err != nil {761		return nil, err762	}763	// #248: If there is more than one network specified in the request attach newly created container to them one by one764	if len(req.Networks) > 1 {765		for _, n := range req.Networks[1:] {766			nw, err := p.GetNetwork(ctx, NetworkRequest{767				Name: n,768			})769			if err == nil {770				endpointSetting := network.EndpointSettings{771					Aliases: req.NetworkAliases[n],772				}773				err = p.client.NetworkConnect(ctx, nw.ID, resp.ID, &endpointSetting)774				if err != nil {775					return nil, err776				}777			}778		}779	}780	c := &DockerContainer{781		ID:                resp.ID,782		WaitingFor:        req.WaitingFor,783		Image:             tag,784		imageWasBuilt:     req.ShouldBuildImage(),785		sessionID:         sessionID,786		provider:          p,787		terminationSignal: termSignal,788		skipReaper:        req.SkipReaper,789		stopProducer:      make(chan bool),790		logger:            p.Logger,791	}792	return c, nil793}794// attemptToPullImage tries to pull the image while respecting the ctx cancellations.795// Besides, if the image cannot be pulled due to ErrorNotFound then no need to retry but terminate immediately.796func (p *DockerProvider) attemptToPullImage(ctx context.Context, tag string, pullOpt types.ImagePullOptions) error {797	var (798		err  error799		pull io.ReadCloser800	)801	err = backoff.Retry(func() error {802		pull, err = p.client.ImagePull(ctx, tag, pullOpt)803		if err != nil {804			if _, ok := err.(errdefs.ErrNotFound); ok {805				return backoff.Permanent(err)806			}807			Logger.Printf("Failed to pull image: %s, will retry", err)808			return err809		}810		return nil811	}, backoff.WithContext(backoff.NewExponentialBackOff(), ctx))812	if err != nil {813		return err814	}815	defer pull.Close()816	// download of docker image finishes at EOF of the pull request817	_, err = ioutil.ReadAll(pull)818	return err819}820// Health measure the healthiness of the provider. Right now we leverage the821// docker-client ping endpoint to see if the daemon is reachable.822func (p *DockerProvider) Health(ctx context.Context) (err error) {823	_, err = p.client.Ping(ctx)824	return825}826// RunContainer takes a RequestContainer as input and it runs a container via the docker sdk827func (p *DockerProvider) RunContainer(ctx context.Context, req ContainerRequest) (Container, error) {828	c, err := p.CreateContainer(ctx, req)829	if err != nil {830		return nil, err831	}832	if err := c.Start(ctx); err != nil {833		return c, fmt.Errorf("%w: could not start container", err)834	}835	return c, nil836}837// daemonHost gets the host or ip of the Docker daemon where ports are exposed on838// Warning: this is based on your Docker host setting. Will fail if using an SSH tunnel839// You can use the "TC_HOST" env variable to set this yourself840func (p *DockerProvider) daemonHost(ctx context.Context) (string, error) {841	if p.hostCache != "" {842		return p.hostCache, nil843	}844	host, exists := os.LookupEnv("TC_HOST")845	if exists {846		p.hostCache = host847		return p.hostCache, nil848	}849	// infer from Docker host850	url, err := url.Parse(p.client.DaemonHost())851	if err != nil {852		return "", err853	}854	switch url.Scheme {855	case "http", "https", "tcp":856		p.hostCache = url.Hostname()857	case "unix", "npipe":858		if inAContainer() {859			ip, err := p.GetGatewayIP(ctx)860			if err != nil {861				// fallback to getDefaultGatewayIP862				ip, err = getDefaultGatewayIP()863				if err != nil {864					ip = "localhost"865				}866			}867			p.hostCache = ip868		} else {869			p.hostCache = "localhost"870		}871	default:872		return "", errors.New("Could not determine host through env or docker host")873	}874	return p.hostCache, nil875}876// CreateNetwork returns the object representing a new network identified by its name877func (p *DockerProvider) CreateNetwork(ctx context.Context, req NetworkRequest) (Network, error) {878	var err error879	// Make sure that bridge network exists880	// In case it is disabled we will create reaper_default network881	p.defaultNetwork, err = getDefaultNetwork(ctx, p.client)882	if req.Labels == nil {883		req.Labels = make(map[string]string)884	}885	nc := types.NetworkCreate{886		Driver:         req.Driver,887		CheckDuplicate: req.CheckDuplicate,888		Internal:       req.Internal,889		EnableIPv6:     req.EnableIPv6,890		Attachable:     req.Attachable,891		Labels:         req.Labels,892	}893	sessionID := uuid.New()894	var termSignal chan bool895	if !req.SkipReaper {896		r, err := NewReaper(ctx, sessionID.String(), p, req.ReaperImage)897		if err != nil {898			return nil, fmt.Errorf("%w: creating network reaper failed", err)899		}900		termSignal, err = r.Connect()901		if err != nil {902			return nil, fmt.Errorf("%w: connecting to network reaper failed", err)903		}904		for k, v := range r.Labels() {905			if _, ok := req.Labels[k]; !ok {906				req.Labels[k] = v907			}908		}909	}910	response, err := p.client.NetworkCreate(ctx, req.Name, nc)911	if err != nil {912		return &DockerNetwork{}, err913	}914	n := &DockerNetwork{915		ID:                response.ID,916		Driver:            req.Driver,917		Name:              req.Name,918		terminationSignal: termSignal,919		provider:          p,920	}921	return n, nil922}923// GetNetwork returns the object representing the network identified by its name924func (p *DockerProvider) GetNetwork(ctx context.Context, req NetworkRequest) (types.NetworkResource, error) {925	networkResource, err := p.client.NetworkInspect(ctx, req.Name, types.NetworkInspectOptions{926		Verbose: true,927	})928	if err != nil {929		return types.NetworkResource{}, err930	}931	return networkResource, err932}933func (p *DockerProvider) GetGatewayIP(ctx context.Context) (string, error) {934	// Use a default network as defined in the DockerProvider935	if p.defaultNetwork == "" {936		var err error937		p.defaultNetwork, err = getDefaultNetwork(ctx, p.client)938		if err != nil {939			return "", err940		}941	}942	nw, err := p.GetNetwork(ctx, NetworkRequest{Name: p.defaultNetwork})943	if err != nil {944		return "", err945	}946	var ip string947	for _, config := range nw.IPAM.Config {948		if config.Gateway != "" {949			ip = config.Gateway950			break951		}952	}953	if ip == "" {954		return "", errors.New("Failed to get gateway IP from network settings")955	}956	return ip, nil957}958func inAContainer() bool {959	// see https://github.com/testcontainers/testcontainers-java/blob/3ad8d80e2484864e554744a4800a81f6b7982168/core/src/main/java/org/testcontainers/dockerclient/DockerClientConfigUtils.java#L15960	if _, err := os.Stat("/.dockerenv"); err == nil {961		return true962	}963	return false964}965// deprecated966// see https://github.com/testcontainers/testcontainers-java/blob/main/core/src/main/java/org/testcontainers/dockerclient/DockerClientConfigUtils.java#L46967func getDefaultGatewayIP() (string, error) {968	// see https://github.com/testcontainers/testcontainers-java/blob/3ad8d80e2484864e554744a4800a81f6b7982168/core/src/main/java/org/testcontainers/dockerclient/DockerClientConfigUtils.java#L27969	cmd := exec.Command("sh", "-c", "ip route|awk '/default/ { print $3 }'")970	stdout, err := cmd.Output()971	if err != nil {972		return "", errors.New("Failed to detect docker host")973	}974	ip := strings.TrimSpace(string(stdout))975	if len(ip) == 0 {976		return "", errors.New("Failed to parse default gateway IP")977	}978	return string(ip), nil979}980func getDefaultNetwork(ctx context.Context, cli *client.Client) (string, error) {981	// Get list of available networks982	networkResources, err := cli.NetworkList(ctx, types.NetworkListOptions{})983	if err != nil {984		return "", err985	}986	reaperNetwork := ReaperDefault987	reaperNetworkExists := false988	for _, net := range networkResources {989		if net.Name == Bridge {990			return Bridge, nil991		}992		if net.Name == reaperNetwork {993			reaperNetworkExists = true994		}...

compose_provider.go

Source:compose_provider.go

...312func (p *DockerProvider) GetGatewayIP(ctx context.Context) (string, error) {313	// Use a default network as defined in the DockerProvider314	var err error315	if p.defaultNetwork == "" {316		p.defaultNetwork, err = getDefaultNetwork(ctx, p.client)317		if err != nil {318			return "", err319		}320	}321	nw, err := p.GetNetwork(ctx, NetworkRequest{Name: p.defaultNetwork})322	if err != nil {323		return "", err324	}325	var ip string326	for _, config := range nw.IPAM.Config {327		if config.Gateway != "" {328			ip = config.Gateway329			break330		}331	}332	if ip == "" {333		return "", errors.New("failed to get gateway IP from network settings")334	}335	return ip, nil336}337func inAContainer() bool {338	if _, err := os.Stat("/.dockerenv"); err == nil {339		return true340	}341	return false342}343// deprecated344func getDefaultGatewayIP() (string, error) {345	cmd := exec.Command("sh", "-c", "ip route|awk '/default/ { print $3 }'")346	stdout, err := cmd.Output()347	if err != nil {348		return "", errors.New("failed to detect docker host")349	}350	ip := strings.TrimSpace(string(stdout))351	if ip == "" {352		return "", errors.New("failed to parse default gateway IP")353	}354	return ip, nil355}356func getDefaultNetwork(ctx context.Context, cli *client.Client) (string, error) {357	// Get list of available networks358	networkResources, err := cli.NetworkList(ctx, types.NetworkListOptions{})359	if err != nil {360		return "", err361	}362	reaperNetwork := ReaperDefault363	reaperNetworkExists := false364	for inx := range networkResources {365		if networkResources[inx].Name == Bridge {366			return Bridge, nil367		}368		if networkResources[inx].Name == reaperNetwork {369			reaperNetworkExists = true370		}...

getDefaultNetwork

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	req := testcontainers.ContainerRequest{5		ExposedPorts: []string{"80/tcp"},6		WaitingFor:   wait.ForListeningPort("80/tcp"),7	}8	container, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{9	})10	if err != nil {11		panic(err)12	}13	network, err := testcontainers.DefaultNetwork(ctx)14	if err != nil {15		panic(err)16	}17	err = network.Connect(ctx, req, container)18	if err != nil {19		panic(err)20	}21	ip, err := container.Host(ctx)22	if err != nil {23		panic(err)24	}25	fmt.Println(ip)26}27import (28func main() {29	ctx := context.Background()30	req := testcontainers.ContainerRequest{31		ExposedPorts: []string{"80/tcp"},32		WaitingFor:   wait.ForListeningPort("80/tcp"),33	}34	container, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{35	})36	if err != nil {37		panic(err)38	}39	network, err := testcontainers.DefaultNetwork(ctx)

getDefaultNetwork

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	req := testcontainers.ContainerRequest{5		ExposedPorts: []string{"6379/tcp"},6		WaitingFor:   wait.ForListeningPort("6379/tcp"),7	}8	redis, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{9	})10	if err != nil {11		panic(err)12	}13	defer redis.Terminate(ctx)14	ip, err := redis.Host(ctx)15	if err != nil {16		panic(err)17	}18	port, err := redis.MappedPort(ctx, "6379")19	if err != nil {20		panic(err)21	}22	fmt.Printf("Redis is available at %s:%s", ip, port.Port())23}24import (25func main() {26	ctx := context.Background()27	req := testcontainers.ContainerRequest{28		ExposedPorts: []string{"6379/tcp"},29		WaitingFor:   wait.ForListeningPort("6379/tcp"),30	}31	redis, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{32	})33	if err != nil {34		panic(err)35	}36	defer redis.Terminate(ctx)37	ip, err := redis.Host(ctx)38	if err != nil {39		panic(err)40	}41	port, err := redis.MappedPort(ctx, "6379")42	if err != nil {43		panic(err)44	}45	fmt.Printf("Redis is available at %s:%s", ip, port.Port())46}47import (48func main() {49	ctx := context.Background()

getDefaultNetwork

Using AI Code Generation

1import (2func main() {3	network, _ := testcontainers.GenericNetwork(testcontainers.GenericNetworkRequest{4		NetworkRequest: testcontainers.NetworkRequest{5		},6	})7	fmt.Println(network)8}9import (10func main() {11	network, _ := testcontainers.GenericNetwork(testcontainers.GenericNetworkRequest{12		NetworkRequest: testcontainers.NetworkRequest{13		},14	})15	fmt.Println(network)16}17import (18func main() {19	network, _ := testcontainers.GenericNetwork(testcontainers.GenericNetworkRequest{20		NetworkRequest: testcontainers.NetworkRequest{21		},22	})23	fmt.Println(network)24}25import (26func main() {27	network, _ := testcontainers.GenericNetwork(testcontainers.GenericNetworkRequest{28		NetworkRequest: testcontainers.NetworkRequest{29		},30	})31	fmt.Println(network)32}33import (34func main() {35	network, _ := testcontainers.GenericNetwork(testcontainers.GenericNetworkRequest{36		NetworkRequest: testcontainers.NetworkRequest{37		},38	})39	fmt.Println(network)40}41import (42func main() {43	network, _ := testcontainers.GenericNetwork(testcontainers.GenericNetworkRequest{44		NetworkRequest: testcontainers.NetworkRequest{45		},

getDefaultNetwork

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	req := testcontainers.ContainerRequest{5		ExposedPorts: []string{"22/tcp"},6		WaitingFor:   wait.ForListeningPort("22/tcp"),7	}8	network, err := testcontainers.GenericNetwork(ctx, testcontainers.GenericNetworkRequest{9	})10	if err != nil {11		log.Println(err)12	}13	container, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{14	})15	if err != nil {16		log.Println(err)17	}18	time.Sleep(10 * time.Second)19}

getDefaultNetwork

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	req := testcontainers.ContainerRequest{5		ExposedPorts: []string{"6379/tcp"},6		WaitingFor:   wait.ForListeningPort("6379/tcp"),7	}8	redisC, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{9	})10	if err != nil {11		log.Fatalf("Could not start container: %v", err)12	}13	defer redisC.Terminate(ctx)14	ip, err := redisC.Host(ctx)15	if err != nil {16		log.Fatalf("Could not get container IP: %v", err)17	}18	port, err := redisC.MappedPort(ctx, "6379")19	if err != nil {20		log.Fatalf("Could not get container port: %v", err)21	}22	fmt.Println(ip)23	fmt.Println(port.Int())24}

getDefaultNetwork

Using AI Code Generation

1import (2func main() {3	network, err := testcontainers.GenericNetwork(context.Background(), testcontainers.GenericNetworkRequest{4		NetworkRequest: testcontainers.NetworkRequest{5		},6	})7	if err != nil {8		log.Fatal(err)9	}10	defer network.Terminate(context.Background())11	fmt.Println("Network Name: ", network.Name())12}13import (14func main() {15	network, err := testcontainers.GenericNetwork(context.Background(), testcontainers.GenericNetworkRequest{16		NetworkRequest: testcontainers.NetworkRequest{17		},18	})19	if err != nil {20		log.Fatal(err)21	}22	defer network.Terminate(context.Background())23	fmt.Println("Network Name: ", network.Name())24	network, err = testcontainers.GenericNetwork(context.Background(), testcontainers.GenericNetworkRequest{25		NetworkRequest: testcontainers.NetworkRequest{26		},27	})28	if err != nil {29		log.Fatal(err)30	}31	fmt.Println("Network Name: ", network.Name())32}33import (34func main() {35	network, err := testcontainers.GenericNetwork(context.Background(), testcontainers.GenericNetworkRequest{36		NetworkRequest: testcontainers.NetworkRequest{37		},38	})39	if err != nil {40		log.Fatal(err)41	}42	defer network.Terminate(context.Background())43	fmt.Println("Network Name: ", network.Name())44	network, err = testcontainers.GenericNetwork(context.Background(), testcontainers.GenericNetworkRequest{45		NetworkRequest: testcontainers.NetworkRequest{

getDefaultNetwork

Using AI Code Generation

1import (2func TestContainer(t *testing.T) {3	ctx := context.Background()4	req := testcontainers.ContainerRequest{5		ExposedPorts: []string{"5432/tcp"},6		WaitingFor:   wait.ForListeningPort("5432/tcp"),7	}8	postgresContainer, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{9	})10	if err != nil {11		log.Fatalf("Could not start container: %s", err)12	}13	defer postgresContainer.Terminate(ctx)14	ip, err := postgresContainer.Host(ctx)15	if err != nil {16		log.Fatalf("Could not get container IP: %s", err)17	}18	port, err := postgresContainer.MappedPort(ctx, "5432")19	if err != nil {20		log.Fatalf("Could not get container port: %s", err)21	}22	fmt.Printf("Container IP: %s, Container Port: %s", ip, port.Port())23}

getDefaultNetwork

Using AI Code Generation

1import (2func main() {3        network, _ := testcontainers.GenericNetwork(testcontainers.GenericNetworkRequest{4        })5        network.Create()6        fmt.Println("Network created")7        network.Remove()8        fmt.Println("Network removed")9}10import (11func main() {12        ctx := context.Background()13        req := testcontainers.ContainerRequest{14                Cmd:          []string{"sh", "-c", "while true; do sleep 1; done"},15        }16        container, _ := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{17        })18        ipAddress, _ := container.Host(ctx)19        fmt.Println("IP Address of the container: " + ipAddress)20        container.Terminate(ctx)21}

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