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Posted to jira@kafka.apache.org by "Dave Sloan (Jira)" <ji...@apache.org> on 2023/04/03 15:52:00 UTC

[jira] [Resolved] (KAFKA-14871) Kafka Connect - TTL not respected for Config Provider-provided connector configurations

     [ https://issues.apache.org/jira/browse/KAFKA-14871?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dave Sloan resolved KAFKA-14871.
--------------------------------
    Resolution: Abandoned

After discussing with my colleagues, we have come to the conclusion that although the behaviour is incorrect there's not actually a good reason for defining the secret providers inside the connector configuration.  For security reasons it is better to define inside the environment (worker properties).

> Kafka Connect - TTL not respected for Config Provider-provided connector configurations
> ---------------------------------------------------------------------------------------
>
>                 Key: KAFKA-14871
>                 URL: https://issues.apache.org/jira/browse/KAFKA-14871
>             Project: Kafka
>          Issue Type: Bug
>          Components: KafkaConnect
>    Affects Versions: 3.3.2
>            Reporter: Dave Sloan
>            Priority: Major
>
> When defining a configuration provider using environment variables (eg via Docker), then a reload is scheduled according to the TTL of the returned configuration.
>  
> Here is an example:
>  
> |Environment Variable|Value|
> |CONNECT_CONFIG_PROVIDERS_VAULT_PARAM_VAULT_ENGINE_VERSION|2|
> |CONNECT_CONFIG_PROVIDERS_VAULT_PARAM_VAULT_TOKEN|9c08104f-98b7-4bce-ab86-4a6c63897ec4|
> |CONNECT_CONFIG_PROVIDERS|vault|
> |CONNECT_CONFIG_PROVIDERS_VAULT_PARAM_DEFAULT_TTL|30000|
> |CONNECT_CONFIG_PROVIDERS_VAULT_PARAM_VAULT_ADDR|http://vault:8200|
> |CONNECT_CONFIG_PROVIDERS_VAULT_PARAM_VAULT_AUTH_METHOD|token|
> |CONNECT_CONFIG_PROVIDERS_VAULT_PARAM_FILE_WRITE|false|
> |CONNECT_CONFIG_PROVIDERS_VAULT_CLASS|io.lenses.connect.secrets.providers.VaultSecretProvider|
>  
>  
> {code:java}
> {
>     "name": "testSink",
>     "config": {
>         "topics": "vaultTest",
>         "name": "testSink",
>         "key.converter": "org.apache.kafka.connect.storage.StringConverter",
>         "test.sink.secret.value": "${vault:rotate-test/myVaultSecretPath:myVaultSecretKey}",
>         "value.converter": "org.apache.kafka.connect.storage.StringConverter",
>         "tasks.max": 1,
>     }
> }{code}
> And this is what we see in the logs:
> {code:java}
> STDOUT: [2023-03-30 07:46:43,204] INFO Scheduling a restart of connector testSink in 4908 ms (org.apache.kafka.connect.runtime.WorkerConfigTransformer){code}
> However when we try and achieve the same via connector properties, no restart is scheduled
>  
>  
>  
> {code:java}
> {
>     "name": "testSink",
>     "config": {
>         "topics": "vaultTest",
>         "name": "testSink",
>         "key.converter": "org.apache.kafka.connect.storage.StringConverter",
>         "value.converter": "org.apache.kafka.connect.storage.StringConverter",
>         "tasks.max": 1,
>         "connector.class": "io.lenses.connect.secrets.test.TestSinkConnector",
>         "test.sink.secret.value": "${vault:rotate-test/myVaultSecretPath:myVaultSecretKey}",
>         "config.providers": "vault",
>         "config.providers.vault.class": "io.lenses.connect.secrets.providers.VaultSecretProvider",
>         "config.providers.vault.param.vault.engineversion": 2,
>         "config.providers.vault.param.vault.token": "9c08104f-98b7-4bce-ab86-4a6c63897ec4",
>         "config.providers.vault.param.default.ttl": 30000,
>         "config.providers.vault.param.vault.addr": "http://vault:8200",
>         "config.providers.vault.param.vault.auth.method": "token",
>         "config.providers.vault.param.file.write": false
>     }
> }{code}
>  
>  
> Upon looking deeper into the code I can see that on line 239 of AbstractConfig
> [https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/common/config/AbstractConfig.java#L539]
>  
> {code:java}
> ConfigTransformerResult result = configTransformer.transform(indirectVariables);{code}
> The result contains the TTLs.  However these are not used.
>  
> Expectation:
> TTLs should be used to schedule a restart of the connector so that the behaviour is the same as if using environment properties.
>  



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