Docker

Since Camel 2.15

Both producer and consumer are supported

Camel component for communicating with Docker.

The Docker Camel component leverages the docker-java via the Docker Remote API.

URI format

docker://[operation]?[options]

Where operation is the specific action to perform on Docker.

Configuring Options

Camel components are configured on two separate levels:

  • component level

  • endpoint level

Configuring Component Options

At the component level, you set general and shared configurations that are, then, inherited by the endpoints. It is the highest configuration level.

For example, a component may have security settings, credentials for authentication, urls for network connection and so forth.

Some components only have a few options, and others may have many. Because components typically have pre-configured defaults that are commonly used, then you may often only need to configure a few options on a component; or none at all.

You can configure components using:

  • the Component DSL.

  • in a configuration file (application.properties, *.yaml files, etc).

  • directly in the Java code.

Configuring Endpoint Options

You usually spend more time setting up endpoints because they have many options. These options help you customize what you want the endpoint to do. The options are also categorized into whether the endpoint is used as a consumer (from), as a producer (to), or both.

Configuring endpoints is most often done directly in the endpoint URI as path and query parameters. You can also use the Endpoint DSL and DataFormat DSL as a type safe way of configuring endpoints and data formats in Java.

A good practice when configuring options is to use Property Placeholders.

Property placeholders provide a few benefits:

  • They help prevent using hardcoded urls, port numbers, sensitive information, and other settings.

  • They allow externalizing the configuration from the code.

  • They help the code to become more flexible and reusable.

The following two sections list all the options, firstly for the component followed by the endpoint.

Component Options

The Docker component supports 21 options, which are listed below.

Name Description Default Type

configuration (common)

To use the shared docker configuration.

DockerConfiguration

email (common)

Email address associated with the user.

String

host (common)

Required Docker host.

localhost

String

port (common)

Docker port.

2375

Integer

requestTimeout (common)

Request timeout for response (in seconds).

Integer

bridgeErrorHandler (consumer)

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions (if possible) occurred while the Camel consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. Important: This is only possible if the 3rd party component allows Camel to be alerted if an exception was thrown. Some components handle this internally only, and therefore bridgeErrorHandler is not possible. In other situations we may improve the Camel component to hook into the 3rd party component and make this possible for future releases. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

false

boolean

lazyStartProducer (producer)

Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing.

false

boolean

autowiredEnabled (advanced)

Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as autowired) by looking up in the registry to find if there is a single instance of matching type, which then gets configured on the component. This can be used for automatic configuring JDBC data sources, JMS connection factories, AWS Clients, etc.

true

boolean

cmdExecFactory (advanced)

The fully qualified class name of the DockerCmdExecFactory implementation to use.

com.github.dockerjava.netty.NettyDockerCmdExecFactory

String

followRedirectFilter (advanced)

Whether to follow redirect filter.

false

boolean

loggingFilter (advanced)

Whether to use logging filter.

false

boolean

maxPerRouteConnections (advanced)

Maximum route connections.

100

Integer

maxTotalConnections (advanced)

Maximum total connections.

100

Integer

parameters (advanced)

Additional configuration parameters as key/value pairs.

Map

serverAddress (advanced)

Server address for docker registry.

https://index.docker.io/v1/

String

socket (advanced)

Socket connection mode.

true

boolean

certPath (security)

Location containing the SSL certificate chain.

String

password (security)

Password to authenticate with.

String

secure (security)

Use HTTPS communication.

false

boolean

tlsVerify (security)

Check TLS.

false

boolean

username (security)

User name to authenticate with.

String

Endpoint Options

The Docker endpoint is configured using URI syntax:

docker:operation

With the following path and query parameters:

Path Parameters (1 parameters)

Name Description Default Type

operation (common)

Required Which operation to use.

Enum values:

  • events

  • stats

  • auth

  • info

  • ping

  • version

  • imagebuild

  • imagecreate

  • imageinspect

  • imagelist

  • imagepull

  • imagepush

  • imageremove

  • imagesearch

  • imagetag

  • containerattach

  • containercommit

  • containercopyfile

  • containercreate

  • containerdiff

  • inspectcontainer

  • containerkill

  • containerlist

  • containerlog

  • containerpause

  • containerrestart

  • containerremove

  • containerstart

  • containerstop

  • containertop

  • containerunpause

  • containerwait

  • execcreate

  • execstart

  • networkconnect

  • networkcreate

  • networkremove

DockerOperation

Query Parameters (21 parameters)

Name Description Default Type

email (common)

Email address associated with the user.

String

host (common)

Required Docker host.

localhost

String

port (common)

Docker port.

2375

Integer

requestTimeout (common)

Request timeout for response (in seconds).

Integer

bridgeErrorHandler (consumer (advanced))

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions (if possible) occurred while the Camel consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. Important: This is only possible if the 3rd party component allows Camel to be alerted if an exception was thrown. Some components handle this internally only, and therefore bridgeErrorHandler is not possible. In other situations we may improve the Camel component to hook into the 3rd party component and make this possible for future releases. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

false

boolean

exceptionHandler (consumer (advanced))

To let the consumer use a custom ExceptionHandler. Notice if the option bridgeErrorHandler is enabled then this option is not in use. By default the consumer will deal with exceptions, that will be logged at WARN or ERROR level and ignored.

ExceptionHandler

exchangePattern (consumer (advanced))

Sets the exchange pattern when the consumer creates an exchange.

Enum values:

  • InOnly

  • InOut

ExchangePattern

lazyStartProducer (producer (advanced))

Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing.

false

boolean

cmdExecFactory (advanced)

The fully qualified class name of the DockerCmdExecFactory implementation to use.

com.github.dockerjava.netty.NettyDockerCmdExecFactory

String

followRedirectFilter (advanced)

Whether to follow redirect filter.

false

boolean

loggingFilter (advanced)

Whether to use logging filter.

false

boolean

maxPerRouteConnections (advanced)

Maximum route connections.

100

Integer

maxTotalConnections (advanced)

Maximum total connections.

100

Integer

parameters (advanced)

Additional configuration parameters as key/value pairs.

Map

serverAddress (advanced)

Server address for docker registry.

https://index.docker.io/v1/

String

socket (advanced)

Socket connection mode.

true

boolean

certPath (security)

Location containing the SSL certificate chain.

String

password (security)

Password to authenticate with.

String

secure (security)

Use HTTPS communication.

false

boolean

tlsVerify (security)

Check TLS.

false

boolean

username (security)

User name to authenticate with.

String

Message Headers

The Docker component supports 82 message header(s), which is/are listed below:

Name Description Default Type

CamelDockerRequestTimeout (common)

Constant: DOCKER_API_REQUEST_TIMEOUT

The request timeout for response (in seconds).

Integer

CamelDockerCertPath (common)

Constant: DOCKER_CERT_PATH

The location containing the SSL certificate chain.

String

CamelDockerHost (common)

Constant: DOCKER_HOST

The docker host.

String

CamelDockerPort (common)

Constant: DOCKER_PORT

The docker port.

Integer

CamelDockerMaxPerRouteConnections (common)

Constant: DOCKER_MAX_PER_ROUTE_CONNECTIONS

The maximum route connections.

Integer

CamelDockerMaxTotalConnections (common)

Constant: DOCKER_MAX_TOTAL_CONNECTIONS

The maximum total connections.

Integer

CamelDockerSecure (common)

Constant: DOCKER_SECURE

Use HTTPS communication.

false

Boolean

CamelDockerTlsVerify (common)

Constant: DOCKER_TLSVERIFY

Check TLS.

false

Boolean

CamelDockerSocketEnabled (common)

Constant: DOCKER_SOCKET_ENABLED

Socket connection mode.

true

Boolean

CamelDockerCmdExecFactory (common)

Constant: DOCKER_CMD_EXEC_FACTORY

The fully qualified class name of the DockerCmdExecFactory implementation to use.

String

CamelDockerFilter (common)

Constant: DOCKER_FILTER

With label filter.

String

CamelDockerShowAll (common)

Constant: DOCKER_SHOW_ALL

With show all flag.

Boolean

CamelDockerContainerId (common)

Constant: DOCKER_CONTAINER_ID

The id of the container.

String

CamelDockerImageId (common)

Constant: DOCKER_IMAGE_ID

The Image ID.

String

CamelDockerEmail (common)

Constant: DOCKER_EMAIL

The email address associated with the user.

String

CamelDockerPassword (common)

Constant: DOCKER_PASSWORD

The password to authenticate with.

String

CamelDockerServerAddress (common)

Constant: DOCKER_SERVER_ADDRESS

The server address for docker registry.

String

CamelDockerUsername (common)

Constant: DOCKER_USERNAME

The user name to authenticate with.

String

CamelDockerRegistry (common)

Constant: DOCKER_REGISTRY

The registry.

String

CamelDockerRepository (common)

Constant: DOCKER_REPOSITORY

The repository.

String

CamelDockerTag (common)

Constant: DOCKER_TAG

The tag.

String

CamelDockerName (common)

Constant: DOCKER_NAME

The image name.

String

CamelDockerTerm (common)

Constant: DOCKER_TERM

The term to search.

String

CamelDockerForce (common)

Constant: DOCKER_FORCE

With force flag.

Boolean

CamelDockerNoPrune (common)

Constant: DOCKER_NO_PRUNE

With no prune flag.

Boolean

CamelDockerInitialRange (common)

Constant: DOCKER_INITIAL_RANGE

The initial range.

Long

CamelDockerBefore (common)

Constant: DOCKER_BEFORE

With before.

String

CamelDockerLimit (common)

Constant: DOCKER_LIMIT

With limit.

Integer

CamelDockerShowSize (common)

Constant: DOCKER_SHOW_SIZE

With show size flag.

Boolean

CamelDockerSince (common)

Constant: DOCKER_SINCE

With since.

String

CamelDockerRemoveVolumes (common)

Constant: DOCKER_REMOVE_VOLUMES

With remove volumes flag.

Boolean

CamelDockerFollowStream (common)

Constant: DOCKER_FOLLOW_STREAM

With follow stream flag.

Boolean

CamelDockerLogs (common)

Constant: DOCKER_LOGS

With logs flag.

Boolean

CamelDockerStdErr (common)

Constant: DOCKER_STD_ERR

With stdErr flag.

Boolean

CamelDockerStdOut (common)

Constant: DOCKER_STD_OUT

With stdOut flag.

Boolean

CamelDockerTimestamps (common)

Constant: DOCKER_TIMESTAMPS

With timestamps flag.

Boolean

CamelDockerTail (common)

Constant: DOCKER_TAIL

With Tail.

Integer

CamelDockerTailAll (common)

Constant: DOCKER_TAIL_ALL

With tail all flag.

Boolean

CamelDockerHostPath (common)

Constant: DOCKER_HOST_PATH

The host path.

String

CamelDockerResource (common)

Constant: DOCKER_RESOURCE

The resource.

String

CamelDockerContainerIdDiff (common)

Constant: DOCKER_CONTAINER_ID_DIFF

With container id for diff container request.

String

CamelDockerTimeout (common)

Constant: DOCKER_TIMEOUT

With timeout.

Integer

CamelDockerSignal (common)

Constant: DOCKER_SIGNAL

With signal.

String

CamelDockerPsArgs (common)

Constant: DOCKER_PS_ARGS

With ps args.

String

CamelDockerNoCache (common)

Constant: DOCKER_NO_CACHE

With no cache flag.

Boolean

CamelDockerQuiet (common)

Constant: DOCKER_QUIET

With quiet flag.

Boolean

CamelDockerRemove (common)

Constant: DOCKER_REMOVE

With remove flag.

Boolean

CamelDockerAttachStdErr (common)

Constant: DOCKER_ATTACH_STD_ERR

With attach StdErr flag.

Boolean

CamelDockerAttachStdIn (common)

Constant: DOCKER_ATTACH_STD_IN

With attach StdIn flag.

Boolean

CamelDockerAttachStdOut (common)

Constant: DOCKER_ATTACH_STD_OUT

With attach StdOut flag.

Boolean

CamelDockerAuthor (common)

Constant: DOCKER_AUTHOR

The author.

String

CamelDockerCmd (common)

Constant: DOCKER_CMD

With cmd.

String or String[]

CamelDockerDisableNetwork (common)

Constant: DOCKER_DISABLE_NETWORK

With disable network flag.

Boolean

CamelDockerEnv (common)

Constant: DOCKER_ENV

With env.

String or String[]

CamelDockerExposedPorts (common)

Constant: DOCKER_EXPOSED_PORTS

The exposed ports.

ExposedPorts or ExposedPorts[]

CamelDockerHostname (common)

Constant: DOCKER_HOSTNAME

The hostname.

String

CamelDockerMessage (common)

Constant: DOCKER_MESSAGE

The message.

String

CamelDockerMemory (common)

Constant: DOCKER_MEMORY

With memory.

Integer

CamelDockerMemorySwap (common)

Constant: DOCKER_MEMORY_SWAP

With memory swap.

Long or Integer

CamelDockerOpenStdIn (common)

Constant: DOCKER_OPEN_STD_IN

With open StdIn flag.

Boolean

CamelDockerPause (common)

Constant: DOCKER_PAUSE

With pause flag.

Boolean

CamelDockerPortSpecs (common)

Constant: DOCKER_PORT_SPECS

With port specs.

String or String[]

CamelDockerStdInOnce (common)

Constant: DOCKER_STD_IN_ONCE

With StdIn in once flag.

Boolean

CamelDockerTty (common)

Constant: DOCKER_TTY

With TTY flag.

Boolean

CamelDockerUser (common)

Constant: DOCKER_USER

With user.

String

CamelDockerVolumes (common)

Constant: DOCKER_VOLUMES

With volumes.

Volume or Volume[]

CamelDockerWorkingDir (common)

Constant: DOCKER_WORKING_DIR

With working directory.

String

CamelDockerCpuShares (common)

Constant: DOCKER_CPU_SHARES

With CPU shares.

Integer

CamelDockerDns (common)

Constant: DOCKER_DNS

With dns.

String or String[]

CamelDockerEntryPoint (common)

Constant: DOCKER_ENTRYPOINT

With entrypoint.

String or String[]

CamelDockerHostConfig (common)

Constant: DOCKER_HOST_CONFIG

With host config.

HostConfig

CamelDockerImage (common)

Constant: DOCKER_IMAGE

The docker image.

String

CamelDockerMemoryLimit (common)

Constant: DOCKER_MEMORY_LIMIT

With memory limit.

Long

CamelDockerStdInOpen (common)

Constant: DOCKER_STD_IN_OPEN

With StdIn in open flag.

Boolean

CamelDockerVolumesFrom (common)

Constant: DOCKER_VOLUMES_FROM

With volumes from.

VolumesFrom or VolumesFrom[]

CamelDockerDomainName (common)

Constant: DOCKER_DOMAIN_NAME

With domain name.

String

CamelDockerBinds (common)

Constant: DOCKER_BINDS

With binds.

Bind or Bind[]

CamelDockerCapAdd (common)

Constant: DOCKER_CAP_ADD

With cap add.

Capability or Capability[]

CamelDockerCapDrop (common)

Constant: DOCKER_CAP_DROP

With cap drop.

Capability or Capability[]

CamelDockerNetwork (common)

Constant: DOCKER_NETWORK

The network name.

String

CamelDockerDetach (common)

Constant: DOCKER_DETACH

With detach flag.

Boolean

CamelDockerExecId (common)

Constant: DOCKER_EXEC_ID

The Exec ID.

String

Usage

Header Strategy

All URI options can be passed as Header properties. Values found in a message header take precedence over URI parameters. A header property takes the form of a URI option prefixed with CamelDocker as shown below

URI Option Header Property

containerId

CamelDockerContainerId

Examples

The following example consumes events from Docker:

from("docker://events?host=192.168.59.103&port=2375").to("log:event");

The following example queries Docker for system-wide information

from("docker://info?host=192.168.59.103&port=2375").to("log:info");

Dependencies

To use Docker in your Camel routes, you need to add a dependency on camel-docker, which implements the component.

If you use Maven, you can add the following to your pom.xml, substituting the version number for the latest and greatest release (see the download page for the latest versions).

<dependency>
  <groupId>org.apache.camel</groupId>
  <artifactId>camel-docker</artifactId>
  <version>x.x.x</version>
</dependency>

Spring Boot Auto-Configuration

When using docker with Spring Boot make sure to use the following Maven dependency to have support for auto configuration:

<dependency>
  <groupId>org.apache.camel.springboot</groupId>
  <artifactId>camel-docker-starter</artifactId>
  <version>x.x.x</version>
  <!-- use the same version as your Camel core version -->
</dependency>

The component supports 22 options, which are listed below.

Name Description Default Type

camel.component.docker.autowired-enabled

Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as autowired) by looking up in the registry to find if there is a single instance of matching type, which then gets configured on the component. This can be used for automatic configuring JDBC data sources, JMS connection factories, AWS Clients, etc.

true

Boolean

camel.component.docker.bridge-error-handler

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions (if possible) occurred while the Camel consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. Important: This is only possible if the 3rd party component allows Camel to be alerted if an exception was thrown. Some components handle this internally only, and therefore bridgeErrorHandler is not possible. In other situations we may improve the Camel component to hook into the 3rd party component and make this possible for future releases. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

false

Boolean

camel.component.docker.cert-path

Location containing the SSL certificate chain.

String

camel.component.docker.cmd-exec-factory

The fully qualified class name of the DockerCmdExecFactory implementation to use.

com.github.dockerjava.netty.NettyDockerCmdExecFactory

String

camel.component.docker.configuration

To use the shared docker configuration. The option is a org.apache.camel.component.docker.DockerConfiguration type.

DockerConfiguration

camel.component.docker.email

Email address associated with the user.

String

camel.component.docker.enabled

Whether to enable auto configuration of the docker component. This is enabled by default.

Boolean

camel.component.docker.follow-redirect-filter

Whether to follow redirect filter.

false

Boolean

camel.component.docker.host

Docker host.

localhost

String

camel.component.docker.lazy-start-producer

Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing.

false

Boolean

camel.component.docker.logging-filter

Whether to use logging filter.

false

Boolean

camel.component.docker.max-per-route-connections

Maximum route connections.

100

Integer

camel.component.docker.max-total-connections

Maximum total connections.

100

Integer

camel.component.docker.parameters

Additional configuration parameters as key/value pairs.

Map

camel.component.docker.password

Password to authenticate with.

String

camel.component.docker.port

Docker port.

2375

Integer

camel.component.docker.request-timeout

Request timeout for response (in seconds).

Integer

camel.component.docker.secure

Use HTTPS communication.

false

Boolean

camel.component.docker.server-address

Server address for docker registry.

https://index.docker.io/v1/

String

camel.component.docker.socket

Socket connection mode.

true

Boolean

camel.component.docker.tls-verify

Check TLS.

false

Boolean

camel.component.docker.username

User name to authenticate with.

String
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