Hashicorp Vault

Since Camel 3.18

Only producer is supported

The hashicorp-vault component that integrates Hashicorp Vault.

URI Format

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

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 Hashicorp Vault component supports 2 options, which are listed below.

Name Description Default Type

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

Endpoint Options

The Hashicorp Vault endpoint is configured using URI syntax:

hashicorp-vault:secretsEngine

With the following path and query parameters:

Path Parameters (1 parameters)

Name Description Default Type

secretsEngine (producer)

Vault Name to be used.

String

Query Parameters (8 parameters)

Name Description Default Type

host (producer)

Hashicorp Vault instance host to be used.

String

operation (producer)

Operation to be performed.

Enum values:

  • createSecret

  • getSecret

  • deleteSecret

  • listSecrets

HashicorpVaultOperation

port (producer)

Hashicorp Vault instance port to be used.

8200

String

scheme (producer)

Hashicorp Vault instance scheme to be used.

https

String

secretPath (producer)

Hashicorp Vault instance secret Path to be used.

String

vaultTemplate (producer)

Autowired Instance of Vault template.

VaultTemplate

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

token (security)

Token to be used.

String

Using Hashicorp Vault Property Function

To use this function, you’ll need to provide credentials for Hashicorp vault as environment variables:

export $CAMEL_VAULT_HASHICORP_TOKEN=token
export $CAMEL_VAULT_HASHICORP_HOST=host
export $CAMEL_VAULT_HASHICORP_PORT=port
export $CAMEL_VAULT_HASHICORP_SCHEME=http/https

You can also configure the credentials in the application.properties file such as:

camel.vault.hashicorp.token = token
camel.vault.hashicorp.host = host
camel.vault.hashicorp.port = port
camel.vault.hashicorp.scheme = scheme

At this point, you’ll be able to reference a property in the following way:

<camelContext>
    <route>
        <from uri="direct:start"/>
        <to uri="{{hashicorp:secret:route}}"/>
    </route>
</camelContext>

Where route will be the name of the secret stored in the Hashicorp Vault instance, in the 'secret' engine.

You could specify a default value in case the secret is not present on Hashicorp Vault instance:

<camelContext>
    <route>
        <from uri="direct:start"/>
        <to uri="{{hashicorp:secret:route:default}}"/>
    </route>
</camelContext>

In this case, if the secret doesn’t exist in the 'secret' engine, the property will fall back to "default" as value.

Also, you are able to get a particular field of the secret, if you have, for example, a secret named database of this form:

{
  "username": "admin",
  "password": "password123",
  "engine": "postgres",
  "host": "127.0.0.1",
  "port": "3128",
  "dbname": "db"
}

You’re able to do get single secret value in your route, in the 'secret' engine, like for example:

<camelContext>
    <route>
        <from uri="direct:start"/>
        <log message="Username is {{hashicorp:secret:database/username}}"/>
    </route>
</camelContext>

Or re-use the property as part of an endpoint.

You could specify a default value in case the particular field of secret is not present on Hashicorp Vault instance, in the 'secret' engine:

<camelContext>
    <route>
        <from uri="direct:start"/>
        <log message="Username is {{hashicorp:secret:database/username:admin}}"/>
    </route>
</camelContext>

In this case, if the secret doesn’t exist or the secret exists (in the 'secret' engine) but the username field is not part of the secret, the property will fall back to "admin" as value.

There is also the syntax to get a particular version of the secret for both the approach, with field/default value specified or only with secret:

<camelContext>
    <route>
        <from uri="direct:start"/>
        <to uri="{{hashicorp:secret:route@2}}"/>
    </route>
</camelContext>

This approach will return the RAW route secret with version '2', in the 'secret' engine.

<camelContext>
    <route>
        <from uri="direct:start"/>
        <to uri="{{hashicorp:route:default@2}}"/>
    </route>
</camelContext>

This approach will return the route secret value with version '2' or default value in case the secret doesn’t exist or the version doesn’t exist (in the 'secret' engine).

<camelContext>
    <route>
        <from uri="direct:start"/>
        <log message="Username is {{hashicorp:secret:database/username:admin@2}}"/>
    </route>
</camelContext>

This approach will return the username field of the database secret with version '2' or admin in case the secret doesn’t exist or the version doesn’t exist (in the 'secret' engine).

The only requirement is adding the camel-hashicorp-vault jar to your Camel application.

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