wiki/amazon-ec2.md
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@@ -26,7 +26,25 @@ In addition to having a password and MFA set for one user one can activate "Acce
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## EC2 Server Architecture for Sailing Analytics
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-The architecture is divided into 3 logical tiers. These are represented by firewall configurations (Security Groups).
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+The architecture is divided into 3 logical tiers. These are represented by firewall configurations (Security Groups) that can be associated to Instances. The following image depicts the parts of the architecture.
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+
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+<img src="/wiki/images/amazon/EC2Architecture.JPG" width="100%" height="100%"/>
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+
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+### Instances
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+
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+<table>
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+<tr>
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+<td><b>Name</b></td>
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+<td><b>Access Key(s)</b></td>
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+<td><b>Security Group</b></td>
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+<td><b>Description</b></td>
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+</tr>
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+<tr>
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+<td>Webserver</td>
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+<td>Administrator</td>
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+<td>Webserver</td>
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+<td>This tier holds one instance that has one public Elastic IP associated. This instance manages all domains and subdomains associated with this project. It also contains the public GIT repository.</td>
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+</table>
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## Creating a new application instance
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