ArcGIS for Server Reference Implementations. An ArcGIS Server s architecture tour

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ArcGIS for Server

Reference Implementations

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Basic Single Machine Site

GIS Server

http:6080 Manager Server Directories & Configuration Store ArcGIS Site Client

Data

(Files)

• Uses

: • Development • Intranets

• Advantages

• Easy to setup

• Fast performance (keep file resources local)

• To keep in mind

• No HA • Security

• Admin end-points exposed to clients

(Consider restricting IPs)

• Only Esri’s token based authentication • No http standard ports used

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Firewall

Forces all access to your GIS Server Through your Proxy

Firewall

DMZ

Single Machine Site

with Proxy

GIS Server

Manager Server Directories & Configuration Store ArcGIS Site Client

Data

(Files)

Data

(DBs) Proxy http:80

Hides your GIS Server machine, and ports Block your admin end-points

http://acme.com/context/admin http://acme.com/context/manager

Administration through 6080

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• Uses

:

• Intranets / Internet access

• Advantages

• Fast performance (keep file resources local) • Enhanced security

• To keep in mind

• No HA

• Token authentication only

GIS Server

Data

(Files)

Data

(DBs) Proxy http:80 Firewall

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The ArcGIS Web Adaptor

• An Esri proxy implementation for ArcGIS Server • Runs on your web server

• IIS, Java

• Helps you leverage your third party web server security features

Including Web Tier Authentication

GIS Server

Data

(Files)

Data

(DBs) Web Adaptor http:80 Firewall

• Automatically handles GIS Servers in your site*

* Will see later

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ArcGIS site

with Multiple Web Adaptors

GIS Server

http:6080 Manager Server Directories & Configuration Store ArcGIS Site

Data

(Files)

Data

(DBs) Firewall Web Adaptor (Private) http:80 Client

Web Adaptor configured to block anonymous access

(Users can see

private and public services)

Client

Web Adaptor

(Public)

http:80

Web Adaptor configured to allow anonymous access (Users can see public services)

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Multi-Machine Sites

GIS Server

http:6080 Server Directories & Configuration Store ArcGIS Site

GIS Server

http:6080

• Two or more machines sharing

single config-store & server directories • Pool of machines using ports 4000-4005+

Internall use only. Clients cannot use

• Data strategies: As usual. Keep local if you can Note: Map caches can’t be local

If you share, share for all

4000…

• All GIS Servers kept in sync for you update one GIS Server…

all other nodes in the pool updated*

* Unless using ‘Clusters’. We will see later

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Multi-Machine Site

With Load Balancer

GIS Server

http:6080

• Typical configuration to support applications • Load balancer fronts a pool of GIS Servers

4000…

• For High Capacity or HA

with simplified administration Client

Load Balancer

• Typically Load Balancer acts as or

is complemented by a proxy + firewall

Firewall

• If not using Web Adaptor, can’t use Web Tier authentication

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GIS Server

http:6080

• A variation of the previous configuration • Supports Web Tier Authentication

4000…

Client

Web Adaptor

Firewall

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GIS Server

http:6080

• A HA variation of the previous configuration • Requires third party load balancer or

web farm clustering

4000…

Client Web Adaptor

Firewall

Web Adaptor

• As in all HA configurations: Must consider HA implications for Server Directories, Config-Store and Data tier

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• ArcGIS Server components

• Single Machine Sites

• Basic

• With Proxy

• With Web Adaptor

• Multi Machine Sites

• Concepts

• Basic (without a load balancer)

• With Load Balancer

• With Web Adaptor

• With redundant Web Adaptors

• Load Balanced Sites

• Concepts

• Active-Passive Fail Over

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Load balanced ArcGIS Site

Concepts

Client

GIS Server

ArcGIS Site

aka Siloed Architecture

Load-Balancer/Proxy or Web Adaptor

GIS Server

_{GIS Server}

Server Directories &

Configuration Store

GIS Server

ArcGIS Site Load-Balancer/Proxy

or Web Adaptor

GIS Server

_{GIS Server}

Server Directories & Configuration Store Proxy/Load Balancer

Use Cases

: • High Availability • High Capacity

Keep in mind:

• Sites are not aware of each other • You must keep Data, Security and

Services in sync

• Must leverage third party load balancers

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• ArcGIS Server components

• Single Machine Sites

• Basic

• With Proxy

• With Web Adaptor

• Multi Machine Sites

• Concepts

• Basic (without a load balancer)

• With Load Balancer

• With Web Adaptor

• With redundant Web Adaptors

• Load Balanced Sites

• Concepts

• Active-Passive Fail Over

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Load Balanced ArcGIS Sites

Active-Active

Client

GIS Server

or Web Adaptor

GIS Server

_{GIS Server}

Configuration Store

GIS Server

or Web Adaptor

GIS Server

_{GIS Server}

Active

Use Cases

: • High Availability • High Capacity

Notes:

• Supports distribution of sites across separate data centers

• Must keep Sites in sync!

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• ArcGIS Server components

• Single Machine Sites

• Basic

• With Proxy

• With Web Adaptor

• Multi Machine Sites

• Concepts

• Basic (without a load balancer)

• With Load Balancer

• With Web Adaptor

• With redundant Web Adaptors

• Load Balanced Sites

• Concepts

• Active-Passive Fail Over

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Load Balanced ArcGIS Sites

Active-Passive Fail-Over

Client

GIS Server

or Web Adaptor

GIS Server

_{GIS Server}

Configuration Store

GIS Server

or Web Adaptor

GIS Server

_{GIS Server}

Active

Use Cases

:

• High Availability with Fail-Over Licensing

Notes:

• No additional licensing cost for Fail-Over sites • Supports distribution of sites across separate

data centers

• Must keep Sites in sync!

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Concept: ‘Clusters’

GIS Server

http:6080 Server Directories & Configuration Store Cluster A

GIS Server

http:6080 4000… _{4000 +1}

_{GIS Server}

Cluster B http:6080 Site

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Concept: ‘Clusters’

GIS Server

http:6080 4000… _{4000 +1}

_{GIS Server}

Cluster B http:6080 Site 4 4 ₂

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GIS Server

http:6080 4000… _{4000 +1}

_{GIS Server}

Cluster B http:6080 Site 2 2 ₄

Total instances (assuming 2 per GIS server)

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Moving services from cluster to cluster

GIS Server

http:6080 4000… _{4000 +1}

_{GIS Server}

Cluster B http:6080 Site 2 4 ₄

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