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Cloudera Edge Management Introduction


Using CEM - Adding a Processor to a Flow

Looking at Events From CEM

Designing a Java Flow

Configure A Stream Execution


Event Details



Example Apache NiFi Receiver 

CEM Design - Open Flow Screen


Configure a PutFile Processor




If you want to revert your current changes to a previous version


     An Example Flow Java Agent




An Example CPP Flow




Example of Data received in NiFi from CPP Agent


                          How to simulate data in GenerateDataFlow



Receiving Agent Data


Agent Logs Showing C2 Activities



Publish Flow to Agents



CEM

You can download CEM and NiFi Registry from Cloudera.   You need the Registry to be able to save and version the flows you will be deploying.

For a simple proof of concept, development test, you can setup both without needing a full fledged database.   You can use the H2 database for learning how to use the system.

I installed CEM on a few versions of Ubuntu and on Centos 7.

First thing you need to do is to install NiFi Registry, run it and create a bucket for EFM to use.

CEM Configuration Basics

conf/efm.properties   - turn on nifi registry
Create a bucket


EFM Settings
# Web Server Properties
#  address: the hostname or ip address of the interface to bind to; to bind to all, use 0.0.0.0
efm.server.address=0.0.0.0
efm.server.port=10080

efm.server.servlet.contextPath=/efm



New Features in MiniFi 0.6.0 C++ Agent

Python Processors

These are great, but first you will need to make sure you have Python installed and know where your Python modules are:

python -c "import site; print(site.getsitepackages())"python -m sitepython -m site --user-site


You will need a precompiled C++ agent for your environment or build it yourself.   You can also choose the Java agent if you do not wish to compile C++.   The C++ agent is smaller with a smaller footprint.

Configuring a MiNiFi Java Agent to Talk to EFM
(bootstrap.conf)

# MiNiFi Command & Control Configuration
# C2 Properties
# Enabling C2 Uncomment each of the following options
# define those with missing options
nifi.c2.enable=true
## define protocol parameters
nifi.c2.rest.url=http://server:10080/efm/api/c2-protocol/heartbeat
nifi.c2.rest.url.ack=http://server:10080/efm/api/c2-protocol/acknowledge
## heartbeat in milliseconds.  defaults to once a second
nifi.c2.agent.heartbeat.period=1000
## define parameters about your agent
nifi.c2.agent.class=centos7java
# Optional.  Defaults to a hardware based unique identifier
nifi.c2.agent.identifier=princeton0java
## Define TLS security properties for C2 communications

Configuring a MiNiFi C++ Agent to Talk to EFM
(minifi.properties)

nifi.c2.enable=true
nifi.c2.agent.protocol.class=RESTSender
nifi.c2.rest.url=http://server:10080/efm/api/c2-protocol/heartbeat
nifi.c2.rest.url.ack=http://server:10080/efm/api/c2-protocol/acknowledge
nifi.c2.root.classes=DeviceInfoNode,AgentInformation,FlowInformation
nifi.c2.agent.heartbeat.period=2000
nifi.c2.agent.class=centos7cpp
nifi.c2.agent.identifier=princeton0cpp

Code:



EFM Ports

EFM Server UI 10080
NiFi Registry 18080
CoAP 8989


EFM REST API

http://server:10080/efm/api/events

{"elements":[],"links":{"last":{"href":"events?filter=created%3Alte%3A1556648075461&pageNum=-1","rel":"last"},"first":{"href":"events?filter=created%3Alte%3A1556648075461&pageNum=0","rel":"first"},"new":{"href":"events?filter=created%3A-lte%3A1556648075461","rel":"new"},"self":{"href":"events?filter=created%3Alte%3A1556648075461&pageNum=0","rel":"self"}},"page":{"size":0,"number":0,"totalElements":0,"totalPages":0}}

http://server:10080/efm/api/events/fields

http://server:10080/efm/api/access

http://server:10080/efm/api/agent-classes

[{"name":"centos7java","agentManifests":["agent-manifest-id"]},{"name":"macjava","agentManifests":["agent-manifest-id"]},{"name":"centos7cpp","agentManifests":["UWcV4yk6ooO5CMMnSGcu7ift"]}]


http://server:10080/efm/api/c2-configuration

http://server:10080/efm/api/c2-configuration/nifi-registry

http://server:10080/efm/api/agents

[{"identifier":"princeton0java","agentClass":"centos7java","agentManifestId":"agent-manifest-id","status":{"uptime":1555621345767},"firstSeen":1555515050675,"lastSeen":1555621345821},{"identifier":"hw13125.local","agentClass":"macjava","agentManifestId":"agent-manifest-id","status":{"uptime":1555677981910},"firstSeen":1555535371415,"lastSeen":1555677983254},{"identifier":"princeton0cpp","agentClass":"centos7cpp","agentManifestId":"UWcV4yk6ooO5CMMnSGcu7ift","status":{"uptime":205159,"repositories":{"flowfile":{"size":0},"provenance":{"size":0}},"components":{"FlowController":{"running":false},"ListenHTTP":{"running":false},"SentimentAnalysis":{"running":false},"AppendHostInfo":{"running":false},"35ad349d-016a-1000-6b25-04742c52dff2":{"running":false}}},"firstSeen":1555678448409,"lastSeen":1555683502395}]

http://server:10080/efm/api/agent-manifests

http://server:10080/efm/api/designer/flows

http://server:10080/efm/api/designer/client-id

http://server:10080/efm/api/designer/flows/summaries

http://server:10080/efm/api/flow-mappings

http://server:10080/efm/api/flows

http://server:10080/efm/api/operations


You will also want an Apache NiFi 1.9.x server to receive calls from the MiNiFi Agents.

References:

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