Location of Nifi Registry's provider.xml on Cloudera Manager

[#1]

Hello everyone,

Does anybody know where I can configure a new flow persistence provider for Nifi Registry using Cloudera Manager? I tried the escape valve for staging/providers.xml, but I get a validation error if I enter the required value to integrate NiFi Registry with Git:

<flowPersistenceProvider>

<class>org.apache.nifi.registry.provider.flow.git.GitFlowPersistenceProvider</class>

<property name="Flow Storage Directory">{{nifi_registry_internal_dir}}/git/perso-recognition-nifi-flows</property>

<property name="Remote To Push">origin</property>

<property name="Remote Access User">paulvid</property>

<property name="Remote Access Password">[your_key]</property>

</flowPersistenceProvider>

I'm following this guide to configure Nifi Registry with Git: https://community.hortonworks.com/articles/222365/how-to-configure-git-for-nifi-registry-in-hdf-32.h... , but the xml configuration differs from Ambari to Cloudera Manager.

Thanks in advance.

[#2]

I was able to make CM generate the correct providers.xml by using the properties below:

Which results on the following providers.xml:

[root@nifi1 399-nifiregistry-NIFI_REGISTRY_SERVER]# cat providers.xml

<providers>

    <flowPersistenceProvider>
    <class>org.apache.nifi.registry.provider.flow.FileSystemFlowPersistenceProvider</class>
    <property name="Flow Storage Directory">/var/lib/nifiregistry/flow_storage</property>

</flowPersistenceProvider>

    <flowPersistenceProvider>
    <class>org.apache.nifi.registry.provider.flow.git.GitFlowPersistenceProvider</class>
    <property name="Remote Access User">yyy</property>
    <property name="Flow Storage Directory">/var/lib/nifi-registry/git/nifi_registry_demo</property>
    <property name="Remote Access Password">xxx</property>
    <property name="Remote to Push">origin</property>

</flowPersistenceProvider>

But now I'm getting this error starting the Nifi service:

...

Caused by: org.apache.nifi.registry.provider.ProviderFactoryException: Unable to load the providers configuration file at: /run/cloudera-scm-agent/process/398-nifiregistry-NIFI_REGISTRY_SERVER/providers.xml
	at org.apache.nifi.registry.provider.StandardProviderFactory.initialize(StandardProviderFactory.java:112) ~[na:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_192]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_192]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_192]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_192]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:366) ~[na:na]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:309) ~[na:na]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:136) ~[na:na]
	... 78 common frames omitted
Caused by: javax.xml.bind.UnmarshalException: null
	at javax.xml.bind.helpers.AbstractUnmarshallerImpl.createUnmarshalException(AbstractUnmarshallerImpl.java:335) ~[na:1.8.0_192]
	at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.createUnmarshalException(UnmarshallerImpl.java:563) ~[na:1.8.0_192]
	at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:249) ~[na:1.8.0_192]
	at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:221) ~[na:1.8.0_192]
	at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:276) ~[na:1.8.0_192]
	at org.apache.nifi.registry.provider.StandardProviderFactory.initialize(StandardProviderFactory.java:109) ~[na:na]
	... 85 common frames omitted
Caused by: org.xml.sax.SAXParseException: cvc-complex-type.2.4.a: Invalid content was found starting with element 'flowPersistenceProvider'. One of '{eventHookProvider}' is expected.
...

[#3]

Hi - It looks like this error is being caused by having two persistence providers in the providers.xml. You may need to add the file-based provider properties (providers.flowPersistenceProvider.file-provider.property.Flow Storage Directory and xml.providers.flowPersistenceProvider.file-provider.class) to the nifi.registry.providers.ignored list so that they are not added to the xml file when CM generates it.

Here is an article detailing the process:

https://community.cloudera.com/t5/Community-Articles/Configuring-the-Git-Persistence-Provider-for-th...