Speaker: Ravi Mutyala When we started using Apache Accumulo on large scale, our key concern was on monitoring the health of the cluster. Accumulo exposes metrics through JMX. Ganglia and Nagios are the de-facto metrics and monitoring tools for hadoop clusters. We identified that integration with ganglia, nagios and Apache Ambari will provide ease of use both for monitoring and managing Accumulo clusters. We started with ganglia and nagios integration which helps reuse all the hadoop monitoring infrastructure for Accumulo. Our next target is Apache Ambari integration for Accumulo. In this talk, we focus on why we need to integrate and how this can be done. We will show a Hands On for ganglia and nagios integration and share the status of ambari integration.

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Monitoring Apache Accumulo

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Your Presenter
Ravi Mutyala
Systems Architect
Hortonworks

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Agenda
• Metrics
• Alerts
• Provisioning and Managing
• Q & A
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Metrics
• JMX
• Ganglia
• Jmxtrans
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Alerts
• Nagios
–Monitoring Ports/Processes
– TabletServers
– GC
– Tracer
– Masters
–Monitoring Metrics
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Hadoop Operations with Ambari
Provision: Simplified deployment across platforms
Manage: Consistent controls across the Stack
Monitor: Visibility into key cluster metrics
- Single pane of glass for Hadoop & System status
- Pre-configured metrics & alerts
- Single point for cluster operations
- Advanced configurations and host controls
- Wizard-driven cluster install experience
- Cloud, virtual and physical environments
Apache Ambari is a 100% open source framework for
provisioning, managing and monitoring Hadoop clusters

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100% Apache Open Source
• Active Community
• 60+ Contributors / 30+ Committers
• 200+ Ambari User Group Members
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2013
Oct
Apache Ambari 1.4.1 Released
Adds operations for Hadoop 2 Stack
Ambari Ambari 1.2.0 Released
Operations for Hadoop 1 Stack
2013
Jan
2013
Dec
Apache Ambari Graduates to Top Level Project

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Ambari Release Cadence
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Ambari 1.4.3
Jan 2014
Ambari 1.4.4
Feb 2014
Ambari 1.5.0
Apr 2014
Ambari 1.7.0
2H2014
Ambari 1.6.0
May 2014

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System Architecture
9
Ambari Server
Host
Agent
Host
Agent
Host
Agent
Ambari
Web
DB
/clusters
Host
Agent

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Ambari Server Architecture
10
DB
Orchestrator Monitoring
REST API
Request Dispatcher
Ambari
Web
Ambari
Server
Ambari
Agents
Metrics
Providers
AuthProvider
/clusters
User
Repo
java
python
JS
RDBMS
LDAP
REST API
Configurable
Auth Provider
Cluster
Configurations
and Topology
Web Client
AD

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Installing Ambari
• Install Ambari Server
• Setup Options
–JDK (Oracle JDK 6, Oracle JDK 7, Custom JDK)
–Database (PostgreSQL, MySQL or Oracle)
–Server Port and HTTPS
–User Authentication (Local, LDAP or AD)
–Server-Agent Two-way SSL
• Start Ambari Server
• Browse to Ambari Web for Cluster Install Wizard
• Install Ambari Agents
–Option #1: Automate via SSH
–Option #2: Manual
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Ambari Agent Registration
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Ambari Server Ambari Agent
11) Agent Heartbeat Begins
1) Connect on Handshake port 8441
4) Sign Agent Cert
2) Download Server Cert
6) Connect on Registration port 8440
7) Perform 2WAY auth using Agent Cert
10) Complete Host Registration
Agent Host
8) Get FQDN
9) Register host
8a)
Host
Script
3) Request to Sign Agent Cert
5) Download Agent Cert + Disconnect

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Extensibility Features
Ambari Stacks
Ambari Blueprints
Ambari Views
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Ambari Stacks
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Ambari Stacks
• Separate “the Stack” from “Ambari”
• Make it easier to bring more than a traditional
“Hadoop Stack” under Ambari management
• Defining a consistent Service lifecycle management
interface that can be extended
• Dynamically add Stacks + Services definitions
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Stack Details
• Stacks define Services + Repos
–What is in the Stack, and where to get the bits
• Each Service has a definition
–What Components are part of the Service
• Each Service has defined lifecycle commands
–start, stop, status, install, configure
• Lifecycle is controlled via command scripts
• Ability to define “custom” commands
• Ability to “extend” Stacks
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AMBARI
SERVER
Stack
Command
Scripts
Service
Definitions
AMBARI
AGENT/S
AMBARI
AGENT/S
AMBARI
AGENT/S
pythonxml
Repos

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Stack Mechanics
• Ambari Server reads Stack definitions on start
• Ambari Server sends a command to Agents
• Agents download Stack definition + command scripts
• Agent executes command
• If the Stack definition changes, Agent will request
latest Stack definition + command scripts
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Ambari Blueprints
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STACK HOSTS BLUEPRINT

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Automating Installs
• Blueprint defines a cluster layout and
component configuration for a Stack
• Provide Blueprint to Ambari to perform
cluster installation (no wizard required)
• Export Blueprint from existing cluster
BLUEPRINT
Ambari
Submit Blueprint
to Ambari Hadoop
Cluster
Ambari provisions
cluster
BLUEPRINT
<stack>
<host>
<service>
<component>
<config>
HOST
MANIFEST
<host>
<meta>
SERVICE
CONFIGS
<props>
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Ambari Views
• Goal: Customize the Ambari Web experience
• Views compliment Stack Extensibility
– Stack Extensibility makes custom Stack Services available to Ambari
– Views expose custom UI features for Services
• Ambari Admins can entitle “views” to Ambari Web users
– Entitlements framework for finer-grained permissions control for Ambari users
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View Usage
• Developer Creates a View
• Deploys View to Ambari Server
• Ambari Admin creates instances of Views
• Ambari Admin entitles Views to users
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Ambari Futures
• Operations
–Ambari Blueprints
–Component log access + search
–Ubuntu and Windows support
• Extensibility
–Finer-grain user entitlements
–Ambari Views
• Insight
–Troubleshooting + Performance Tuning
–Capacity Planning
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Learn More
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Resource Location
Apache Ambari Project Page http://ambari.apache.org
Ambari Project Wiki https://cwiki.apache.org/confluence/display/AMBARI
Ambari Project JIRA https://issues.apache.org/jira/browse/AMBARI

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Q & A
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